This document discusses a study on the effects of partially replacing aggregate with reclaimed asphalt pavement (RAP) material in dense bituminous macadam (DBM) design for flexible pavements. The study aims to promote more sustainable pavement construction by recycling RAP. Physical properties of mixtures containing different proportions of RAP aggregate are tested, including water absorption, stripping value, aggregate gradation, specific gravity, penetration, and Marshall stability. Test results indicate that replacing up to 30% of natural aggregate with RAP can meet design specifications and standards, offering potential cost savings while sustainably reusing demolition waste. The study concludes that RAP materials can successfully be used in flexible pavement bases and subbases when blended to achieve proper
To Study the Behaviour of use Bituminous Pavement Wastes in Cement Concreteijtsrd
Generally, aggregate prepare 60 to 75 of total concrete amount, therefore the aggregate choice is crucial, and additionally they regulate concrete qualities. Aggregate offer wear resistance as well as strength. So, the aggregate selection, as well as proportioning, must need more attention. The aggregate is usually crushed rocks for example limestone, coarse gravel, maybe granite as well as good aggregate like sand or maybe stone dust. Aggregate formed Bulk pavement structure. This research paper represents a review on the utilization of bituminous pavement wastes. This can assist in obtaining economic climate in construction of road along with preserving environment friendly degradation in term of decreased amount of pollution as well as mining. Gulshan | Nitin Thakur "To Study the Behaviour of use Bituminous Pavement Wastes in Cement Concrete" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd28042.pdfPaper URL: https://www.ijtsrd.com/engineering/civil-engineering/28042/to-study-the-behaviour-of-use-bituminous-pavement-wastes-in-cement-concrete/gulshan
Effect of partial replacement of natural sand with crushed sand along with su...eSAT Journals
Abstract
The effect of partial replacement of natural sand (NS) by crushed sand (CS) and partial replacement of cement by supplementary cementing material have been investigated. All the trials have been taken at actual construction site and tested at site laboratory. Supplementary Cementing materials (SCM) Fly Ash and GGBS have been used and cement has been replaced by three combination of Fly ash (15%, 20%, 25%) and two combinations of GGBS (40% & 50%). In both the cases , 50% natural sand have been replaced by crushed sand .Both the materials have shown good compatible results when used and it is found that use of SCM gives better result in terms of compressive strength and workability due to reduction in w/c ratio. This paper puts forward the applications of crushed sand and supplementary cementing materials as an attempt towards sustainable development. It will help to find viable solution to the declining availability of natural sand to make eco-balance.
Keywords: Crushed Sand (CS), Natural Sand (NS), Fly Ash (FA), Ground Granulated Blast Furnace Slag (GGBS), Admixture.
To Study the Behaviour of use Bituminous Pavement Wastes in Cement Concreteijtsrd
Generally, aggregate prepare 60 to 75 of total concrete amount, therefore the aggregate choice is crucial, and additionally they regulate concrete qualities. Aggregate offer wear resistance as well as strength. So, the aggregate selection, as well as proportioning, must need more attention. The aggregate is usually crushed rocks for example limestone, coarse gravel, maybe granite as well as good aggregate like sand or maybe stone dust. Aggregate formed Bulk pavement structure. This research paper represents a review on the utilization of bituminous pavement wastes. This can assist in obtaining economic climate in construction of road along with preserving environment friendly degradation in term of decreased amount of pollution as well as mining. Gulshan | Nitin Thakur "To Study the Behaviour of use Bituminous Pavement Wastes in Cement Concrete" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd28042.pdfPaper URL: https://www.ijtsrd.com/engineering/civil-engineering/28042/to-study-the-behaviour-of-use-bituminous-pavement-wastes-in-cement-concrete/gulshan
Effect of partial replacement of natural sand with crushed sand along with su...eSAT Journals
Abstract
The effect of partial replacement of natural sand (NS) by crushed sand (CS) and partial replacement of cement by supplementary cementing material have been investigated. All the trials have been taken at actual construction site and tested at site laboratory. Supplementary Cementing materials (SCM) Fly Ash and GGBS have been used and cement has been replaced by three combination of Fly ash (15%, 20%, 25%) and two combinations of GGBS (40% & 50%). In both the cases , 50% natural sand have been replaced by crushed sand .Both the materials have shown good compatible results when used and it is found that use of SCM gives better result in terms of compressive strength and workability due to reduction in w/c ratio. This paper puts forward the applications of crushed sand and supplementary cementing materials as an attempt towards sustainable development. It will help to find viable solution to the declining availability of natural sand to make eco-balance.
Keywords: Crushed Sand (CS), Natural Sand (NS), Fly Ash (FA), Ground Granulated Blast Furnace Slag (GGBS), Admixture.
Dave Aver, City of Santa Rosa, and Greg Reader, George Reed Inc., deliver a presentation on Superpave Mix Designs, test methods and how the results are incorporated in the final Job Mix Formula. Presentation delivered on Nov. 7, 2019 at the California Asphalt Pavement Association Fall Asphalt Pavement Conference in Sacramento, Calif.
A comparative study between traditional method and mix design with industrial...Premier Publishers
Generally bituminous pavements face problems like cracks, rutting, depression and corrugation during it’s period of service. In this paper, we attempted various method of experiments both in traditional and mix design with bi products and therefore a comparative study has been made for extracting the finest results for the betterment of highway pavements (flexible) and for that our key elements were fly ash, geo-polymer and pieces of waste conveyer belt, added to bitumen for increasing the strength and overall capacity of pavements. Fly ash added to bitumen in the penetration test has shown improvement of 52 mm which was 40mm traditionally. Whereas, geo polymer and bitumen give the result of 74mm penetration. Ductility test with fly ash showed 37.23cm, very rigid. But geo-polymer and bitumen gave the result of 75.77cm. For increasing the bearing capacity of base soil we added pieces of waste conveyer belts and CBR value has shown the increment of 35% from 30%. So, those results convey that, the waste materials and bi products have enough quality to increase the strength and flexibility of pavements which will further help to the construction workers and engineers for maintaining and repairing flexible pavements which last long.
Compatibility study of slag cement with PCE based admixturesAbdulRazakBH
Abstract - Admixture-Cement interaction in concrete is a complex blend of chemical and physical mechanism that are independent. Every admixture at optimum dosage gives better results when used with cement. The proposed research work is aimed at testing compatibility of slag cement at different dosages with PCE based admixtures. It was found that The Combination 80% Cement With 20% GGBS Are More Compatible Compared To All The Optimum Dosage Combinations.
Key Words: GGBS, PCE based admixture, Compatibility
Dave Aver, City of Santa Rosa, and Greg Reader, George Reed Inc., deliver a presentation on Superpave Mix Designs, test methods and how the results are incorporated in the final Job Mix Formula. Presentation delivered on Nov. 7, 2019 at the California Asphalt Pavement Association Fall Asphalt Pavement Conference in Sacramento, Calif.
A comparative study between traditional method and mix design with industrial...Premier Publishers
Generally bituminous pavements face problems like cracks, rutting, depression and corrugation during it’s period of service. In this paper, we attempted various method of experiments both in traditional and mix design with bi products and therefore a comparative study has been made for extracting the finest results for the betterment of highway pavements (flexible) and for that our key elements were fly ash, geo-polymer and pieces of waste conveyer belt, added to bitumen for increasing the strength and overall capacity of pavements. Fly ash added to bitumen in the penetration test has shown improvement of 52 mm which was 40mm traditionally. Whereas, geo polymer and bitumen give the result of 74mm penetration. Ductility test with fly ash showed 37.23cm, very rigid. But geo-polymer and bitumen gave the result of 75.77cm. For increasing the bearing capacity of base soil we added pieces of waste conveyer belts and CBR value has shown the increment of 35% from 30%. So, those results convey that, the waste materials and bi products have enough quality to increase the strength and flexibility of pavements which will further help to the construction workers and engineers for maintaining and repairing flexible pavements which last long.
Compatibility study of slag cement with PCE based admixturesAbdulRazakBH
Abstract - Admixture-Cement interaction in concrete is a complex blend of chemical and physical mechanism that are independent. Every admixture at optimum dosage gives better results when used with cement. The proposed research work is aimed at testing compatibility of slag cement at different dosages with PCE based admixtures. It was found that The Combination 80% Cement With 20% GGBS Are More Compatible Compared To All The Optimum Dosage Combinations.
Key Words: GGBS, PCE based admixture, Compatibility
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Vaccine management system project report documentation..pdfKamal Acharya
The Division of Vaccine and Immunization is facing increasing difficulty monitoring vaccines and other commodities distribution once they have been distributed from the national stores. With the introduction of new vaccines, more challenges have been anticipated with this additions posing serious threat to the already over strained vaccine supply chain system in Kenya.
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
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