USE OF LCA AS A TOOL TO MEASURE CARBON DIOXIDE AND ASSIST IN DECISIONS ABOUT ...Victor Barbosa
This study presents a simulation of two masonry systems, with two different mortar and four different systems of materials transportation in a construction site, materials like bricks and mortar, for the same building shape and size, in order to quantify carbon dioxide emissions, one of the greenhouse gases, for each one of the possible combinations.
Concrete is one of the most versatile materials used in infrastructural development. It plays a critical role in in construction industry and making it sustainable is of paramount importance. How do we do it? Let us look here!!
Concrete Industry Sustainable Construction StrategyVikki Jacobs
The concrete industry in the UK has committed to a strategy for sustainable construction. The strategy has four objectives: 1) agree on a common framework, 2) improve environmental profiles, 3) enable clients to achieve sustainability, and 4) communicate progress. Key 2012 targets include increasing certified environmental management systems to 85%, reducing waste to landfill by 15%, and reducing CO2 emissions by 17% from 1990 levels. The strategy aims to make the UK concrete industry a leader in sustainable construction by 2012.
Commercialisation of geopolymer concrete as part of FP7 SUS-CON projectQUBGeopolymer
The document discusses the development of geopolymer concrete using waste materials as part of an EU research project. It provides background on geopolymer research and describes the goals of developing new sustainable concrete binders from waste streams to reduce environmental impacts. The project aims to commercialize geopolymer concrete by optimizing mixtures using various waste materials as aggregates and alkali activators and understanding the reaction mechanisms.
Ecocem green economyexpopresentation 20may-ver2aDamian Connon
This document discusses the significance of embodied carbon emissions in construction. It notes that embodied carbon accounts for 11% of global emissions and can be as high as 62% of a building's total lifetime emissions. While the SEAI's strategy has focused on reducing operational emissions, the document argues that embodied emissions should be part of the current 5-year strategy. Concrete contributes substantially to embodied emissions, and using GGBS cement can significantly reduce a home's embodied carbon footprint. Increasing GGBS usage represents an opportunity to cost-effectively abate up to 600,000 tons of emissions annually in Ireland. Green procurement policies and building standards that consider both operational and embodied emissions are needed to realize this opportunity.
Design of geopolymers integration of economic & enviromentalTran Nam
This document discusses methods for sustainably designing geopolymers by integrating economic and environmental considerations in the early stages of material development. It presents two multi-criteria decision analysis methods - a compensatory method using weighted indicators and an objectives hierarchy, and a non-compensatory dominance concept - for screening raw material options for geopolymers. 58 raw materials were screened using these methods to select the most promising ones for further evaluation based on technical, economic and environmental criteria. The results demonstrate that introducing life cycle thinking early in material development is possible and that screening is an important step to downselect options without losing valuable alternatives.
Development of Recycled Aggregates In The Implementation ofthe Concrete:Liter...IJERA Editor
Civil engineering is rapidly evolving with the natural, political and environmental development. Due to
a shortage of natural resources, to sustainable development and environmental certificationsrequirements,
recycling of aggregates is increasingly valued.Research is done everywhere in the world (in 2016, more
than a hundred doctoral subjects were proposed in this sense) in order to normalize the use of recycled aggregates,
specify the domain and restrictionsof using concrete constructions design protocols based on recycled
aggregates.Since the 80s, researches are based on the type of the recycled (concrete aggregates,
remains aggregates , glass, rubbers…) and the percentage of it compared to natural aggregates to
study the influence on the basic characteristics of concrete..
The main characteristics studied are the porosity of the concrete, the tensile strength and the compressive
strength. In comparison with natural aggregates, concrete based on recycled aggregates has
lower resistance values of approximately 20% but has better thermal characteristics than about 5% .These
characteristics are basic for the dimensioning especially of the carrier elements so they are demanding
bettertechnical and experimental studies to determine the optimum proportion of recycled aggregates for use in
the preparation of concrete.
In Morocco, recycled aggregates, does not have any specific standards, and is used mainly in roads
and pavements construction. Even if it’s not normalized this use is not recent, in 1999 during the rehabilitation
of the expressway road from Casablanca which was severely damaged on both channels,
the authorities have opted for the reuse of aggregates instead of reloading the existing pavement with
a new one.
The chosen alternative combinesthe replacement of existing material by a bituminous mixture and a
cold instead reprocessing depending of differences of damage and requirement on the structural capacity for
slow and fast lanes.This paper, part of my doctoral research, discusses different aspects of the problem beginning
with a brief description of the advantages of recycling in all of the levels: social, economic… and a review
of the international and national standards in terms of construction and demolition waste generated, recycled
aggregates producedand their utilization in concrete. It also gives a benchmarking of the engineering properties
of recycled aggregates and concludes by proposing some market opportunities and development paths and potential
uses of recycled aggregates
USE OF LCA AS A TOOL TO MEASURE CARBON DIOXIDE AND ASSIST IN DECISIONS ABOUT ...Victor Barbosa
This study presents a simulation of two masonry systems, with two different mortar and four different systems of materials transportation in a construction site, materials like bricks and mortar, for the same building shape and size, in order to quantify carbon dioxide emissions, one of the greenhouse gases, for each one of the possible combinations.
Concrete is one of the most versatile materials used in infrastructural development. It plays a critical role in in construction industry and making it sustainable is of paramount importance. How do we do it? Let us look here!!
Concrete Industry Sustainable Construction StrategyVikki Jacobs
The concrete industry in the UK has committed to a strategy for sustainable construction. The strategy has four objectives: 1) agree on a common framework, 2) improve environmental profiles, 3) enable clients to achieve sustainability, and 4) communicate progress. Key 2012 targets include increasing certified environmental management systems to 85%, reducing waste to landfill by 15%, and reducing CO2 emissions by 17% from 1990 levels. The strategy aims to make the UK concrete industry a leader in sustainable construction by 2012.
Commercialisation of geopolymer concrete as part of FP7 SUS-CON projectQUBGeopolymer
The document discusses the development of geopolymer concrete using waste materials as part of an EU research project. It provides background on geopolymer research and describes the goals of developing new sustainable concrete binders from waste streams to reduce environmental impacts. The project aims to commercialize geopolymer concrete by optimizing mixtures using various waste materials as aggregates and alkali activators and understanding the reaction mechanisms.
Ecocem green economyexpopresentation 20may-ver2aDamian Connon
This document discusses the significance of embodied carbon emissions in construction. It notes that embodied carbon accounts for 11% of global emissions and can be as high as 62% of a building's total lifetime emissions. While the SEAI's strategy has focused on reducing operational emissions, the document argues that embodied emissions should be part of the current 5-year strategy. Concrete contributes substantially to embodied emissions, and using GGBS cement can significantly reduce a home's embodied carbon footprint. Increasing GGBS usage represents an opportunity to cost-effectively abate up to 600,000 tons of emissions annually in Ireland. Green procurement policies and building standards that consider both operational and embodied emissions are needed to realize this opportunity.
Design of geopolymers integration of economic & enviromentalTran Nam
This document discusses methods for sustainably designing geopolymers by integrating economic and environmental considerations in the early stages of material development. It presents two multi-criteria decision analysis methods - a compensatory method using weighted indicators and an objectives hierarchy, and a non-compensatory dominance concept - for screening raw material options for geopolymers. 58 raw materials were screened using these methods to select the most promising ones for further evaluation based on technical, economic and environmental criteria. The results demonstrate that introducing life cycle thinking early in material development is possible and that screening is an important step to downselect options without losing valuable alternatives.
Development of Recycled Aggregates In The Implementation ofthe Concrete:Liter...IJERA Editor
Civil engineering is rapidly evolving with the natural, political and environmental development. Due to
a shortage of natural resources, to sustainable development and environmental certificationsrequirements,
recycling of aggregates is increasingly valued.Research is done everywhere in the world (in 2016, more
than a hundred doctoral subjects were proposed in this sense) in order to normalize the use of recycled aggregates,
specify the domain and restrictionsof using concrete constructions design protocols based on recycled
aggregates.Since the 80s, researches are based on the type of the recycled (concrete aggregates,
remains aggregates , glass, rubbers…) and the percentage of it compared to natural aggregates to
study the influence on the basic characteristics of concrete..
The main characteristics studied are the porosity of the concrete, the tensile strength and the compressive
strength. In comparison with natural aggregates, concrete based on recycled aggregates has
lower resistance values of approximately 20% but has better thermal characteristics than about 5% .These
characteristics are basic for the dimensioning especially of the carrier elements so they are demanding
bettertechnical and experimental studies to determine the optimum proportion of recycled aggregates for use in
the preparation of concrete.
In Morocco, recycled aggregates, does not have any specific standards, and is used mainly in roads
and pavements construction. Even if it’s not normalized this use is not recent, in 1999 during the rehabilitation
of the expressway road from Casablanca which was severely damaged on both channels,
the authorities have opted for the reuse of aggregates instead of reloading the existing pavement with
a new one.
The chosen alternative combinesthe replacement of existing material by a bituminous mixture and a
cold instead reprocessing depending of differences of damage and requirement on the structural capacity for
slow and fast lanes.This paper, part of my doctoral research, discusses different aspects of the problem beginning
with a brief description of the advantages of recycling in all of the levels: social, economic… and a review
of the international and national standards in terms of construction and demolition waste generated, recycled
aggregates producedand their utilization in concrete. It also gives a benchmarking of the engineering properties
of recycled aggregates and concludes by proposing some market opportunities and development paths and potential
uses of recycled aggregates
This document discusses the future of fly ash use in concrete. Globally, there is not enough fly ash available, while locally some areas have too much. Reducing CO2 emissions will increase the value of "clean" fly ash. Utilities that market fly ash will need to carefully consider their path forward regarding issues like mercury, carbon/sorbents, and trona/sodium bicarbonate. Fly ash provides benefits when used in concrete like improved properties and reduced costs and carbon footprint, though it can reduce strength and air entraining. Cement production accounts for 4-7% of global anthropogenic CO2 emissions, so substituting fly ash for clinker in cement can help reduce those emissions. Careful planning
B&i2013 donderdag 15.45_zaal_b_low-carbon concretes using novel mineral binde...Bouwmaterialen_Innovatie
The document discusses low carbon concretes that use novel mineral binders as cement substitutes to reduce greenhouse gas emissions from concrete production. It introduces bifam, a zero-carbon cement substitute made from industrial byproducts that can replace cement in concrete at rates from 30-100%. Bifam has binding properties similar to cement and can lower the carbon footprint of concrete products by up to 94% compared to conventional cement. Initial applications in paving blocks and masonry blocks show bifam can increase product quality while reducing production costs. A production plant is planned to begin supplying bifam in 2014.
Green cement is an environmentally friendly alternative to ordinary Portland cement (OPC) that uses optimized recycled materials. It produces 0-0.1 tons of CO2 compared to 1 ton from OPC, uses sustainable raw materials, and allows for raw material reuse. Types include those made from fly ash, magnesium oxide, steel/glass waste, and those that sequester carbon or use lower temperature processes. The global green cement market is growing rapidly, led by countries like the US and companies including LafargeHolcim. Production in India is also increasing to reduce the carbon footprint of the cement industry.
Sustainable lightweight design on vehilesAlbert Ruby
Presentation on what are the factor to check in mind while designing a car.and materials for parts, sustainability factor. embodied energy for different materials.
The document summarizes research presented at an international conference on the partial replacement of cement in geopolymer quarry rock dust concrete under different curing conditions. It includes objectives to study the effects of different fly ash and cement mixtures cured through normal, steam, and hot air oven methods. Results showed that compressive and flexural strength generally increased with higher curing temperatures and cement content. Steam curing produced the highest strengths across mixture designs. The research aims to address sustainability challenges in concrete production by exploring geopolymer alternatives.
Concrete is a major contributor to greenhouse gas emissions and other environmental problems due to the materials used in its production. Green concrete aims to address these issues by using recycled concrete waste and other industrial byproducts as aggregate materials instead of traditional virgin sources, making the concrete production process more environmentally friendly.
Using Recycled & Lightweight Material in Construction - Cost & Environmental Benefits. From the session on 'Environmental Impact' at 'Saint-Gobain Days' held at Yas Island, Abu Dhabi on 14th and 15th April, 2015. Presented by Jason Hird, Senior Technical Development Manager - Gyproc Middle East and Daniel Easter, Plant Manager - Gyproc Middle East.
The green benefits of cement and concrete are hidden due to the vast quantities consumed around the globe. Therefore, despite the low carbon footprint, cement and concrete are often given low marks for sustainability. The presentation attempts to set the record straight.
This document summarizes research on geopolymer concrete as an alternative to traditional Portland cement concrete. Geopolymer concrete is made through a chemical reaction of aluminosilicate materials like fly ash with an alkaline solution, forming a three dimensional polymeric chain structure. It offers benefits over Portland cement like lower CO2 emissions in production, higher strength and durability, and the ability to utilize industrial waste materials. Some potential applications highlighted include use in coastal and cold weather construction for its chloride resistance, as well as airport runways and highways due to its heat resistance.
Sustainability challenge of the aluminum industry: transforming wastes into p...Marcelo Suster
The work that follows is a contribution to the aluminum industry’s sustainability. It deals with the critical issue of solid wastes accruing to that sector. By-products from aluminum refining are solid wastes, liquid effluents and gaseous emissions. Each kilogram of metal produced is accompanied by three and a half kilograms of bauxite residue, commonly known as red mud. Current practice is to use decantation lagoons that are built with elaborate precautions for preventing environmental contamination. The aim of the present work is to investigate this pollutant within the perspective of current solid industrial waste technologies, and to study the practicalities for utilization and new processes. The very high ratio residue/end product provides a strong incentive insofar as the residue concerned does in fact offer numerous commercial opportunities. Thus the feasibility of converting the residue into a raw material is a real alternative to landfill disposal. Numerous industrial processes and technologies have been considered in relation to environmental legislation, industrial marketing, competitive processes and other factors. In conclusion the subject paper recommends a series of activities that would achieve transformation of red mud into valuable substances and substitute other existing raw materials without adversely affecting quality and the environment.
Presentation by
Primary Information Services
www.primaryinfo.com
mailto:primaryinfo@gmail.com
Download PDF Version at
https://www.slideshare.net/thorapadi/presentations
See You tube Channel
https://www.youtube.com/user/ch600091/videos?view_as=subscriber
Guideline for Calculating CO2 Emission from Ready Mixed Concrete Production a...Piti Sukontasukkul
This document provides guidelines for calculating CO2 emissions from ready mixed concrete production and construction activities. It discusses environmental issues in the concrete sector and past international actions addressing climate change. The document then presents the Thai Cement Association's manual for calculating CO2 emissions from concrete production processes, including inventory data on materials, production types, transportation, and energies. Finally, it provides two case studies applying the manual to calculate emissions from ready mixed concrete production and prefabricated house construction.
The document discusses geopolymer cement concretes as an alternative to traditional Portland cement concretes. Geopolymer cement concretes utilize industrial byproducts like fly ash and blast furnace slag instead of Portland cement, reducing CO2 emissions by around 80%. The cement industry contributes significantly to global CO2 emissions, so finding alternatives like geopolymer cement could help mitigate climate change issues. Geopolymer cement concretes form polymeric bonds between silica and alumina instead of calcium-silicate hydrates like Portland cement, but can achieve similar structural strength.
This document discusses green concrete as an alternative to traditional OPC concrete that can help address issues of global warming and pollution. It defines green concrete as any concrete that reduces carbon dioxide emissions, saves energy, and uses eco-friendly materials by partially or fully replacing OPC with industrial wastes like fly ash, rice husk ash, or slag. Green concretes like geopolymer concrete provide advantages over OPC concrete such as lower CO2 emissions, reduced energy needs, and superior strength and durability properties. The use of green concrete can thus benefit both the environment and economy.
Introduction and sustainable development in concrete technologyKathan Sindhvad
The document discusses sustainable development practices in concrete technology. It covers several topics:
1. Concrete has high embodied energy due to cement production, but has potential to be efficient over its long lifespan. Supplementary cementing materials and reducing cement content can lower environmental impacts.
2. Concrete's thermal mass allows it to reduce operational energy usage in buildings through passive heating and cooling. It also enables more efficient radiant heating systems.
3. Recycled concrete aggregate can be used in new concrete, reducing waste and costs while maintaining durability. This supports sustainable development goals.
This document summarizes information presented on the US cement industry and environmental regulations. It discusses EPA enforcement initiatives since 2008 to reduce air pollution from cement plants. Key results include emissions reductions of over 2,000 tons/year and $40 million in penalties. The document also outlines cement kiln regulations and required pollution control technologies. Emerging issues like alternative fuels and CO2 capture technologies are reviewed. In conclusion, cement plants should prepare for potential EPA enforcement and develop strategies to address regulations and emerging issues.
This document summarizes a study on the properties of fly ash bricks prepared in Bangladesh. Fly ash is a byproduct of coal combustion and its improper disposal poses environmental issues. The study aims to utilize fly ash as a partial replacement for clay in making bricks. Bricks with 0%, 20%, 30%, 40%, and 50% fly ash replacement were prepared and tested. Results showed that up to 20% fly ash replacement can produce bricks meeting size and strength requirements, while increasing water absorption. The study demonstrates the potential for more sustainable brick production and fly ash disposal in Bangladesh.
D2 (B4) Claus Vestergaard Nielsen - Green concrete - Cement mixed with limest...Svenska Betongföreningen
This document summarizes research on developing green concrete mixtures using cement with limestone and calcined clay additions. The research was conducted in Denmark from 2014-2019 and aimed to reduce the carbon dioxide emissions of concrete by at least 50% by 2030. One outcome was a new cement called FutureCem, containing 30% less CO2 than conventional cement. FutureCem has been allowed for most building applications in Denmark but further research is underway to improve durability, especially sulfate resistance and freeze-thaw performance, to expand allowed uses.
D2 (B4) Katarina Malaga - BETCRETE 2.0 - how Swedish cement- and concrete pro...Svenska Betongföreningen
1) The document discusses BETCRETE 2.0, a project in Sweden that aims to help cement and concrete producers implement climate neutral concrete practices by 2022. It involves 21 organizations led by RISE, the Research Institutes of Sweden.
2) The project is developing roadmaps and guidance for the cement and concrete industries to reduce their carbon emissions through methods like using alternative cement types, optimized concrete mixtures, biofuels and carbon capture technologies.
3) BETCRETE 2.0 is also creating an EPD database and tool to help select lower carbon concretes, studying carbon uptake through concrete carbonation, and exploring an environmental marking system for concrete. The overall goal is to commercialize climate neutral
This document discusses the future of fly ash use in concrete. Globally, there is not enough fly ash available, while locally some areas have too much. Reducing CO2 emissions will increase the value of "clean" fly ash. Utilities that market fly ash will need to carefully consider their path forward regarding issues like mercury, carbon/sorbents, and trona/sodium bicarbonate. Fly ash provides benefits when used in concrete like improved properties and reduced costs and carbon footprint, though it can reduce strength and air entraining. Cement production accounts for 4-7% of global anthropogenic CO2 emissions, so substituting fly ash for clinker in cement can help reduce those emissions. Careful planning
B&i2013 donderdag 15.45_zaal_b_low-carbon concretes using novel mineral binde...Bouwmaterialen_Innovatie
The document discusses low carbon concretes that use novel mineral binders as cement substitutes to reduce greenhouse gas emissions from concrete production. It introduces bifam, a zero-carbon cement substitute made from industrial byproducts that can replace cement in concrete at rates from 30-100%. Bifam has binding properties similar to cement and can lower the carbon footprint of concrete products by up to 94% compared to conventional cement. Initial applications in paving blocks and masonry blocks show bifam can increase product quality while reducing production costs. A production plant is planned to begin supplying bifam in 2014.
Green cement is an environmentally friendly alternative to ordinary Portland cement (OPC) that uses optimized recycled materials. It produces 0-0.1 tons of CO2 compared to 1 ton from OPC, uses sustainable raw materials, and allows for raw material reuse. Types include those made from fly ash, magnesium oxide, steel/glass waste, and those that sequester carbon or use lower temperature processes. The global green cement market is growing rapidly, led by countries like the US and companies including LafargeHolcim. Production in India is also increasing to reduce the carbon footprint of the cement industry.
Sustainable lightweight design on vehilesAlbert Ruby
Presentation on what are the factor to check in mind while designing a car.and materials for parts, sustainability factor. embodied energy for different materials.
The document summarizes research presented at an international conference on the partial replacement of cement in geopolymer quarry rock dust concrete under different curing conditions. It includes objectives to study the effects of different fly ash and cement mixtures cured through normal, steam, and hot air oven methods. Results showed that compressive and flexural strength generally increased with higher curing temperatures and cement content. Steam curing produced the highest strengths across mixture designs. The research aims to address sustainability challenges in concrete production by exploring geopolymer alternatives.
Concrete is a major contributor to greenhouse gas emissions and other environmental problems due to the materials used in its production. Green concrete aims to address these issues by using recycled concrete waste and other industrial byproducts as aggregate materials instead of traditional virgin sources, making the concrete production process more environmentally friendly.
Using Recycled & Lightweight Material in Construction - Cost & Environmental Benefits. From the session on 'Environmental Impact' at 'Saint-Gobain Days' held at Yas Island, Abu Dhabi on 14th and 15th April, 2015. Presented by Jason Hird, Senior Technical Development Manager - Gyproc Middle East and Daniel Easter, Plant Manager - Gyproc Middle East.
The green benefits of cement and concrete are hidden due to the vast quantities consumed around the globe. Therefore, despite the low carbon footprint, cement and concrete are often given low marks for sustainability. The presentation attempts to set the record straight.
This document summarizes research on geopolymer concrete as an alternative to traditional Portland cement concrete. Geopolymer concrete is made through a chemical reaction of aluminosilicate materials like fly ash with an alkaline solution, forming a three dimensional polymeric chain structure. It offers benefits over Portland cement like lower CO2 emissions in production, higher strength and durability, and the ability to utilize industrial waste materials. Some potential applications highlighted include use in coastal and cold weather construction for its chloride resistance, as well as airport runways and highways due to its heat resistance.
Sustainability challenge of the aluminum industry: transforming wastes into p...Marcelo Suster
The work that follows is a contribution to the aluminum industry’s sustainability. It deals with the critical issue of solid wastes accruing to that sector. By-products from aluminum refining are solid wastes, liquid effluents and gaseous emissions. Each kilogram of metal produced is accompanied by three and a half kilograms of bauxite residue, commonly known as red mud. Current practice is to use decantation lagoons that are built with elaborate precautions for preventing environmental contamination. The aim of the present work is to investigate this pollutant within the perspective of current solid industrial waste technologies, and to study the practicalities for utilization and new processes. The very high ratio residue/end product provides a strong incentive insofar as the residue concerned does in fact offer numerous commercial opportunities. Thus the feasibility of converting the residue into a raw material is a real alternative to landfill disposal. Numerous industrial processes and technologies have been considered in relation to environmental legislation, industrial marketing, competitive processes and other factors. In conclusion the subject paper recommends a series of activities that would achieve transformation of red mud into valuable substances and substitute other existing raw materials without adversely affecting quality and the environment.
Presentation by
Primary Information Services
www.primaryinfo.com
mailto:primaryinfo@gmail.com
Download PDF Version at
https://www.slideshare.net/thorapadi/presentations
See You tube Channel
https://www.youtube.com/user/ch600091/videos?view_as=subscriber
Guideline for Calculating CO2 Emission from Ready Mixed Concrete Production a...Piti Sukontasukkul
This document provides guidelines for calculating CO2 emissions from ready mixed concrete production and construction activities. It discusses environmental issues in the concrete sector and past international actions addressing climate change. The document then presents the Thai Cement Association's manual for calculating CO2 emissions from concrete production processes, including inventory data on materials, production types, transportation, and energies. Finally, it provides two case studies applying the manual to calculate emissions from ready mixed concrete production and prefabricated house construction.
The document discusses geopolymer cement concretes as an alternative to traditional Portland cement concretes. Geopolymer cement concretes utilize industrial byproducts like fly ash and blast furnace slag instead of Portland cement, reducing CO2 emissions by around 80%. The cement industry contributes significantly to global CO2 emissions, so finding alternatives like geopolymer cement could help mitigate climate change issues. Geopolymer cement concretes form polymeric bonds between silica and alumina instead of calcium-silicate hydrates like Portland cement, but can achieve similar structural strength.
This document discusses green concrete as an alternative to traditional OPC concrete that can help address issues of global warming and pollution. It defines green concrete as any concrete that reduces carbon dioxide emissions, saves energy, and uses eco-friendly materials by partially or fully replacing OPC with industrial wastes like fly ash, rice husk ash, or slag. Green concretes like geopolymer concrete provide advantages over OPC concrete such as lower CO2 emissions, reduced energy needs, and superior strength and durability properties. The use of green concrete can thus benefit both the environment and economy.
Introduction and sustainable development in concrete technologyKathan Sindhvad
The document discusses sustainable development practices in concrete technology. It covers several topics:
1. Concrete has high embodied energy due to cement production, but has potential to be efficient over its long lifespan. Supplementary cementing materials and reducing cement content can lower environmental impacts.
2. Concrete's thermal mass allows it to reduce operational energy usage in buildings through passive heating and cooling. It also enables more efficient radiant heating systems.
3. Recycled concrete aggregate can be used in new concrete, reducing waste and costs while maintaining durability. This supports sustainable development goals.
This document summarizes information presented on the US cement industry and environmental regulations. It discusses EPA enforcement initiatives since 2008 to reduce air pollution from cement plants. Key results include emissions reductions of over 2,000 tons/year and $40 million in penalties. The document also outlines cement kiln regulations and required pollution control technologies. Emerging issues like alternative fuels and CO2 capture technologies are reviewed. In conclusion, cement plants should prepare for potential EPA enforcement and develop strategies to address regulations and emerging issues.
This document summarizes a study on the properties of fly ash bricks prepared in Bangladesh. Fly ash is a byproduct of coal combustion and its improper disposal poses environmental issues. The study aims to utilize fly ash as a partial replacement for clay in making bricks. Bricks with 0%, 20%, 30%, 40%, and 50% fly ash replacement were prepared and tested. Results showed that up to 20% fly ash replacement can produce bricks meeting size and strength requirements, while increasing water absorption. The study demonstrates the potential for more sustainable brick production and fly ash disposal in Bangladesh.
D2 (B4) Claus Vestergaard Nielsen - Green concrete - Cement mixed with limest...Svenska Betongföreningen
This document summarizes research on developing green concrete mixtures using cement with limestone and calcined clay additions. The research was conducted in Denmark from 2014-2019 and aimed to reduce the carbon dioxide emissions of concrete by at least 50% by 2030. One outcome was a new cement called FutureCem, containing 30% less CO2 than conventional cement. FutureCem has been allowed for most building applications in Denmark but further research is underway to improve durability, especially sulfate resistance and freeze-thaw performance, to expand allowed uses.
D2 (B4) Katarina Malaga - BETCRETE 2.0 - how Swedish cement- and concrete pro...Svenska Betongföreningen
1) The document discusses BETCRETE 2.0, a project in Sweden that aims to help cement and concrete producers implement climate neutral concrete practices by 2022. It involves 21 organizations led by RISE, the Research Institutes of Sweden.
2) The project is developing roadmaps and guidance for the cement and concrete industries to reduce their carbon emissions through methods like using alternative cement types, optimized concrete mixtures, biofuels and carbon capture technologies.
3) BETCRETE 2.0 is also creating an EPD database and tool to help select lower carbon concretes, studying carbon uptake through concrete carbonation, and exploring an environmental marking system for concrete. The overall goal is to commercialize climate neutral
D2 (B4) Wolfgang Kunther - Short term chloride binding and biofouling.pdfSvenska Betongföreningen
This document summarizes research on the short-term chloride binding, biofouling, and microstructural changes of different cementitious binders exposed to the Øresund strait environment. Three binders were tested: 100% Portland cement (CEM I-100), a calcined clay and limestone blend similar to CEM II/B (CEM II/B-65), and a blend with higher clay replacement outside of CEM II/B standards (CEM II/C-56). After 28 days of exposure, the CEM I binder had more diatom growth and gastropod grazing compared to the CEM II blends. The CEM II blends showed lower chloride ingress
D1 (A3) Johan Silfwerbrand - Design by testing - Lessons learned from full-sc...Svenska Betongföreningen
This document summarizes lessons learned from full-scale loading tests on industrial fiber concrete floors. Design by testing according to Eurocodes allows including unknown beneficial effects but has disadvantages like difficulties performing a sufficient number of tests and risk of major cracks. Loading tests in Sweden combined a test at a suitable location with coring a large number of cores to estimate properties. While loading tests cannot be the sole design method due to challenges, combinations with coring show promise as an alternative quality assurance approach. Further research is needed on hidden factors that influence load-carrying capacity.
HeidelbergCement is accelerating its efforts to become carbon neutral. Its Slite cement plant in Sweden aims to produce climate-positive cement by 2030 through carbon capture and storage. A pre-feasibility study identified amine-based carbon capture technology as the best option. The project would increase electricity demand by 200 MW and require an investment of around 10 billion SEK. An upcoming feasibility study will optimize energy and transport solutions to minimize environmental impact and pave the way for climate-positive cement production in Sweden.
Concrete durability is influenced by many factors including mix design, structural design, application, and curing. Standards like EN 206-1 provide exposure classes and minimum requirements for cement content and w/c ratio depending on environmental aggressiveness to ensure durability. Proper mix design with adequate cement content and low w/c ratio, along with proper application and curing, are essential for achieving durable concrete.
FUTURECEM is a patented cement technology developed by Aalborg Portland that enables reduced clinker content in concrete compared to conventional concrete. It is based on the synergistic effect of mixing limestone and calcined clay with Portland clinker, which results in higher strength than expected. The technology was developed over multiple projects from 1990-2019 and has been introduced commercially. It can reduce the CO2 footprint of concrete by up to 27% and has been used in several construction projects in Denmark. The CALLISTE project aims to further develop FUTURECEM to meet more applications and achieve higher CO2 reduction.
study of self-compacting concrete for economical constructionTejas6957
topic is to prove that self-compacting concrete[SCC] is more cheaper than ordinary concrete in mass concrete. and we PROVED that SCC is cheaper then ordinary concrete. yes, goal is achieved.........
The document discusses two fly ash samples from different coal sources that will be evaluated for their performance in cement. Fly ash properties are influenced by the coal type and boiler conditions. Key performance indicators for good fly ashes include high fineness, low carbon content, and high concentrations of reactive silica and calcium. The second sample, from hard coal, is identified as performing better because it has a higher concentration of reactive silica, lower carbon content, and finer particle size distribution despite a lower bulk density. These factors indicate it will have higher reactivity and better pozzolanic performance in cement.
1. BALINIT® Diamond coatings are used in a wide range of applications including graphite molds, composites, aerospace, automotive, and more due to their extreme hardness and wear resistance.
2. Two types of BALINIT® Diamond coatings are offered: Classic, which has a crystalline structure and is best for graphite machining, and Plus, which has a nanocrystalline structure and is well-suited for composites like carbon fiber reinforced plastics.
3. Oerlikon Balzers in Luxembourg is a world-leading center of competence for BALINIT® Diamond and ta-C coatings, accredited to meet the stringent quality standards of the aerospace industry
BALINIT® Diamond coatings provide excellent wear resistance and are used in a variety of applications ranging from machining graphite molds to composites and carbon fiber reinforced plastics. The coating is available in two technologies: BALINIT® Diamond Classic, which has a crystalline structure and is well-suited for graphite machining, and BALINIT® Diamond Plus, which has a nanocrystalline structure and precision suitable for composites and carbon fiber reinforced plastics machining. Oerlikon Balzers in Luxembourg is the center of competence for BALINIT® Diamond coatings and is NADCAP accredited.
IRJET- Study on Behaviour of Sea Water Concrete with Fly Ash and Sugar SolutionIRJET Journal
The document summarizes a study on the suitability of using sea water in concrete. The researchers conducted experiments with concrete mixes using sea water instead of fresh water, and added various percentages of fly ash and sugar solution as admixtures. They tested the compressive strength and split tensile strength of sea water concrete cubes and cylinders cured in sea water, and found that with optimal admixture proportions, the durability of sea water concrete can be improved and its strength values come close to that of conventional concrete made with fresh water. The study aims to encourage the use of sea water in construction to conserve fresh water resources.
Challenges in managing structural asset portfolios in the Middle EastFaiz Mohammed Khan
Asset owners are troubled by the premature deterioration of structural assets in the Arabian Gulf. This presentation looks in to the problem and helps understand the causes and consequences with recommendations for minimizing risks and optimizing whole lifecycle costs.
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Grøn betong II – Ett danskt projekt om klimatreducerad betong - Claus Vestergaard, Teknologisk Institut.
1. Claus Vestergaard Nielsen, Svensk Betongdagen, 2019-11-21
Danish Innovation Consortium (2014-2018)
Green Transition of Cement and Concrete
Production in Denmark
2. Claus Vestergaard Nielsen, Svensk Betongdagen, 2019-11-21
Companies
Aalborg Portland A/S
Sweco A/S
Rambøll Danmark A/S
MT Højgaard A/S
Unicon A/S
Dansk Beton Fabriksbetonforeningen
A/S Ikast Betonvarefabrik
Betonværket Brønderslev A/S
DK Beton A/S
Frejlev Cementstøberi A/S
Gammelrand Beton A/S
IBF Beton Nordvestjylland A/S
K.G. Beton A/S
NCC Roads, Bornholms Betonværk A/S
Skagen Cementstøberi A/S
Thisted-Fjerritslev Cementvarefabrik A/S
Unicon A/S
VK Beton og Byggemarked A/S
Wewers Belægningssten A/S
Participants
Knowledge and dissemination
Teknologisk Institut (DTI)
Københavns Erhvervsakademi
Erhvervsakademi Sjælland
Erhvervsakademiet Lillebælt
Via University College – Campus Horsens
Center for Betonuddannelse (AMU
Nordjylland)
Academia (Research)
DTU Byg
Other
Energistyrelsen
InnoBYG network
Building owners
Vejdirektoratet
Banedanmark
Femern A/S
3. Claus Vestergaard Nielsen, Svensk Betongdagen, 2019-11-21
Purpose and motivation
Denmark has a long tradition for Green Concrete
since the late 1990ies
Cement manufacturer under pressure to develop
new green binder materials
General lack of SCM’s in the market
Sustainability is getting high on the agenda
Need to collaborate across the “specifier –
designer – producer – supplier” chain
4. Claus Vestergaard Nielsen, Svensk Betongdagen, 2019-11-21
Activities
Test and demonstrate new binder systems in full scale
Development of transport model for concrete (DTU)
for durability modelling
Develop and apply the methodology for the use of
performance-based specifications/requirements
instead of deemed-to-satisfy requirements
…
5. Claus Vestergaard Nielsen, Svensk Betongdagen, 2019-11-21
Activities …cont.
Assess the potential for CO2 reductions
Full-scale demonstration projects
(three bridges and an indoor wall)
Establish exposure sites for long-term observations
Workshops for concrete students
6. Claus Vestergaard Nielsen, Svensk Betongdagen, 2019-11-21
Danish concrete branch organisation has
launched a sustainability initiative:
50 % reduction of CO2 footprint per unit concrete
in 2030 compared with today (2019)
Aalborg Portland is working on new cement
type for 2020
Based on CEM II/B-M (LL-Q)
Danish EN 206 DK NA has opened up for more
use of bio-coal-FA and limestone filler
What is next step ?
7. Claus Vestergaard Nielsen, Svensk Betongdagen, 2019-11-21
Marine exposure sites and a highway between traffic lanes
Exposure sites for long-term
durability data
Hirtshals, West Coast Rødby near Femern
9. Claus Vestergaard Nielsen, Svensk Betongdagen, 2019-11-21
Funktionsbaseret optimering
Motorway bridge – Rødby, 2016
Trial castings. Unicon, MT Højgaard
Bridge elements to be lifted in place
Extension of railway bridge
10. Claus Vestergaard Nielsen, Svensk Betongdagen, 2019-11-21
XC2, XC3, XC4 + XF1 (air entrainment), V/C < 0.55
Requirement on min. strength class C30/37
Danish requirements on binder
Cement C
(EN 197-1)
SCM’s
(if used)
Limitations when
calculating V/C
Other remarks
CEM I (min.
42.4 MPa)
+ FA + MS
k = 0.5 and 2.0
FA/C ≤ 0.33
MS/C ≤ 0.11
Normal approach in DK.
Clinker ratio typically > 80%
CEM II/A-V
CEM II/B-V
+ MS
k = 2.0
MS/C ≤ 0.11 Normally not used
CEM II/A-L
CEM II/A-LL
+ FA + MS
k = 0.5 and 2.0
FA/C ≤ 0.33
MS/C ≤ 0.11
CEM II/A-LL is used in DK precast
Clinker ratio as low as 60 %
CEM I (min.
52.5 MPa)
+ GCC type A
+ GCC type B
GCC/C ≤ 0.25 (k = 1.0)
GCC/C ≤ 0.10 (k = 1.0)
GCC = Ground limestone filler
(fulfilling certain requirements)
11. Claus Vestergaard Nielsen, Svensk Betongdagen, 2019-11-21
XD2, XD3, XS3, V/C < 0.40 and strength class C40/50
For XF4 air void structure shall be good
For XA3 sulphate resistant cement, CEM I - SR5
Danish requirements on binder
Cement C
(EN 197-1)
SCM’s
(if used)
Limitations when
calculating V/C
Other remarks
CEM I (min.
42.4 MPa)
+ FA + MS
k = 0.5 and 2.0
FA/C ≤ 0.33
MS/C ≤ 0.11
Normal approach in DK.
Clinker ratio typically > 80%
CEM II/A-V
+ MS
k = 2.0
MS/C ≤ 0.11 Normally not used.
CEM II/A-L
CEM II/A-LL
+ FA + MS
k = 0.5 and 2.0
FA/C ≤ 0.33
MS/C ≤ 0.11
Only for XD3 without frost.
Clinker ratio as low as 60 %
Normally not used.
12. Claus Vestergaard Nielsen, Svensk Betongdagen, 2019-11-21
Two concrete applications
Bridge concrete XD3, XS3, XF4, XA3 - C35/40
Indoor concrete XC1, C25/30, SCC
Compare the candidate concretes with
reference mix designs
CEM I 42.5 SR5, Fly ash FA/C = 0.15 for the
bridge application, V/C = 0.37, C40/50
CEM I 52.5 N, Fly ash FA/C = 0.25 for the
building application, V/C = 0.69, C25/30, SCC
How did we investigate ?
13. Claus Vestergaard Nielsen, Svensk Betongdagen, 2019-11-21
Performance-based development for hardened
concrete:
Strength and E-modulus
Freeze-thaw resistance (only for bridge)
Chloride migration at different times up to
one year (only for bridge)
Carbonation resistance (only for indoor)
Fresh properties:
Slump/flow, air content
Viscosity, stickiness
How did we investigate ?
14. Claus Vestergaard Nielsen, Svensk Betongdagen, 2019-11-21
For the bridge applications CEM I 52.5 N was used:
FA/C = 0.8. Clinker only 55% of binder.
FA/C = 0.5 and LL/C = 0.35. Clinker only 54%.
FA/C = 0.5 and no LL. up to 0.8. Clinker 67%.
Mixes with limestone and calcined clay:
CEM I / LL / Q = 86% / 2% / 12% CEM II/A-M (Q-LL)
CEM I / LL / Q = 86% / 6% / 8% CEM II/A-M (Q-LL)
Plus mixes with FA addition 10 to 20% of binder
For the building application
CEM I / LL / Q = 65% / 14% / 21% CEM II/B-M (Q-LL)
Resulting mixes
15. Claus Vestergaard Nielsen, Svensk Betongdagen, 2019-11-21
www.gronbeton.dk
www.baeredygtigbeton.dk
CLN@DTI.dk
Questions… ?
More information