After the top construction chemical company in India, smoked lime and pozzolana were significantly reduced until the technique was all forgotten until the 14th century.
These papers explain in some detail what is green concrete
Presented by my dear wife in her graduate studies I loved to share with you to benefit everyone
Thanks to my wife(Ashwaq Mahmoud) for this effort
a brief research about permeability & durability of concrete with helpful images for civil engineering students
fully made by Amira Abdullah (civil engineering student in Ismailia - Egypt)
A brief overview on Non conventional concrete technologies like Self compacting concrete,Green concrete etc.
A good topic for technical presentation on Civil Engg.
These papers explain in some detail what is green concrete
Presented by my dear wife in her graduate studies I loved to share with you to benefit everyone
Thanks to my wife(Ashwaq Mahmoud) for this effort
a brief research about permeability & durability of concrete with helpful images for civil engineering students
fully made by Amira Abdullah (civil engineering student in Ismailia - Egypt)
A brief overview on Non conventional concrete technologies like Self compacting concrete,Green concrete etc.
A good topic for technical presentation on Civil Engg.
Cellular Light Weight Concrete Blocks Machine- Manufacturers & Suppliers
Our proficient and dedicated professionals make the utmost use of these facilities and work round the clock with a client centric approach to meet the industrial requirements. These professionals are well versed and have updated knowledge on the latest technology which ensures hassle free and efficient procurement and storage. We have been highly benefited by our facilities, this being one of the reasons for establishing ourselves as a prominent organization.
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Permeability of concrete, chemical attack, acid attack, efflorescence, Corrosion in concrete. Thermal conductivity, thermal diffusivity, specific heat. Alkali Aggregate Reaction
Green concrete for sustainable constructioneSAT Journals
Abstract There are many choices in regard to selection of materials in any type of constructions. Due to growing interest in sustainable construction, engineers and architects are motivated to choose the materials which are more sustainable. Green concrete capable for sustainable construction is characterized by application of industrial wastes to reduce consumption of natural resources and energy and pollution of the environment. Replacement of materials over nominal concrete is what makes green concrete more environmental friendly concrete. Marble sludge powder, quarry rocks, crushed concrete and fly ashes are some of the materials used for making green concrete, a sustainable construction. Keywords: Construction Industry, Environmental Impact, Geo-polymer concrete, Green Concrete, Recycled Materials, Sustainable Construction, Virgin Material.
Hii sir good morning to all
this Ppt is prepared for to protect the environment from co2 gasses could you please read it understand
i hope we are all use the green concrete ....
thank you friends
have a nice day
Role of Additives in Mortars: Historic PrecedentsIJERA Editor
The use of lime in building construction began at least 10,000 years ago, where there are numerous evidence of its earlier uses. This research is an attempt to provide a review of the history of lime as a building material in based on available literature resources. The origin significance and sustainability of lime mortars and their use in architectural conservation is discussed. Large scale use of additives in historic buildings in India and abroad is highlighted in order to put forth their physio-chemical and aesthetical properties. Use of sustainable additives in mortar is stressed. The analysis presented is supposed to help architectural conservation experts in their efforts to safeguard the intrinsic qualities Indian cultural heritage for posterity.
Designing, Specifying & Constructing with Modern ConcreteLiving Online
This manual deals with the manufacture, design and maintenance of concrete, including details about ingredients and how quality and quantity affects the final product. Other areas covered are: concrete specifications standards and codes concepts such as ready-mix, precast and prestressed concrete and their applications suggestions for best practice for protection and maintenance of concrete
http://www.idc-online.com/content/designing-specifying-and-constructing-modern-concrete-27?id=27
Cellular Light Weight Concrete Blocks Machine- Manufacturers & Suppliers
Our proficient and dedicated professionals make the utmost use of these facilities and work round the clock with a client centric approach to meet the industrial requirements. These professionals are well versed and have updated knowledge on the latest technology which ensures hassle free and efficient procurement and storage. We have been highly benefited by our facilities, this being one of the reasons for establishing ourselves as a prominent organization.
www.clcblockmachine.in, www.clcplant.com
Permeability of concrete, chemical attack, acid attack, efflorescence, Corrosion in concrete. Thermal conductivity, thermal diffusivity, specific heat. Alkali Aggregate Reaction
Green concrete for sustainable constructioneSAT Journals
Abstract There are many choices in regard to selection of materials in any type of constructions. Due to growing interest in sustainable construction, engineers and architects are motivated to choose the materials which are more sustainable. Green concrete capable for sustainable construction is characterized by application of industrial wastes to reduce consumption of natural resources and energy and pollution of the environment. Replacement of materials over nominal concrete is what makes green concrete more environmental friendly concrete. Marble sludge powder, quarry rocks, crushed concrete and fly ashes are some of the materials used for making green concrete, a sustainable construction. Keywords: Construction Industry, Environmental Impact, Geo-polymer concrete, Green Concrete, Recycled Materials, Sustainable Construction, Virgin Material.
Hii sir good morning to all
this Ppt is prepared for to protect the environment from co2 gasses could you please read it understand
i hope we are all use the green concrete ....
thank you friends
have a nice day
Role of Additives in Mortars: Historic PrecedentsIJERA Editor
The use of lime in building construction began at least 10,000 years ago, where there are numerous evidence of its earlier uses. This research is an attempt to provide a review of the history of lime as a building material in based on available literature resources. The origin significance and sustainability of lime mortars and their use in architectural conservation is discussed. Large scale use of additives in historic buildings in India and abroad is highlighted in order to put forth their physio-chemical and aesthetical properties. Use of sustainable additives in mortar is stressed. The analysis presented is supposed to help architectural conservation experts in their efforts to safeguard the intrinsic qualities Indian cultural heritage for posterity.
Designing, Specifying & Constructing with Modern ConcreteLiving Online
This manual deals with the manufacture, design and maintenance of concrete, including details about ingredients and how quality and quantity affects the final product. Other areas covered are: concrete specifications standards and codes concepts such as ready-mix, precast and prestressed concrete and their applications suggestions for best practice for protection and maintenance of concrete
http://www.idc-online.com/content/designing-specifying-and-constructing-modern-concrete-27?id=27
18. Identify (at least 5) and explain their meanings of reducing ble.pdfarihantplastictanksh
18. Identify (at least 5) and explain their meanings of reducing bleeding in concrete? 19. Identify
and explain the early year of Portland cement. When was it first produced in the US?
20. Aggregates are usually divided into how many groups?
21. Name and describe three chemical admixtures in concrete?
22. What are the major reasons for using chemical admixtures in concrete mixtures?
23. Why is concrete so widely used?
24. How can we produce air-entraining concrete?
25. What are concrete components?
26. What are footings? Name two types and show how they relate to the building?
27. What are two types of Concrete Buildings Systems?
28. What are the six categories of concrete wall systems in current use?
Solution
18) Bleeding in fresh concrete refers to the process where free water in the mix is pushed upward
to the surface due to the settlement of heavier solid particles such as cement and water. Some
bleeding is normal but excessive bleeding can be problematic. The way you work that bleed
water can affect the durability of your products.
The biggest factor in bleed water rates is the water-to-cement ratio. A higher ratio can lead to
excessive bleeding. The cement type and fine aggregates can play a role in determining the bleed
rate. The fewer fines you have in your mix, the more bleeding will occur. Factors also include
concrete height and pressure. The relationship between bleed water and concrete heights starts
off as linear, but eventually becomes nonlinear at increased heights.
Ways to reduce bleeding in concrete include:
19) Portland cement is a basic cement mixture and a fundamental ingredient for many common
cement applications. Because Portland cement is very common, it is also often called “Ordinary
Portland Cement” or simply “OPC.” Since the early 20th century, Portland cement has been used
internationally for a wide variety of applications including concrete projects, mortar pastes,
stucco decorations, and grout fillings
Roman cement was the predecessor to ordinary Portland cement. A crude form of Roman cement
was rediscovered by English engineer John Smeaton in 1756. The formula for Roman cement
was refined and patented in 1796 by James Parker.
Around 1811, James Frost developed British cement: a new way of processing cement that
became instrumental in making Portland cement. In 1824, the first form of Portland cement was
patented by English cement manufacturer Joseph Aspdin. Aspdin’s version of Portland cement
was further refined by his son, William, in 1843, and it closely resembled the ordinary Portland
cement we know today.
The United States imported Portland cement from Germany and England as early as 1868.
Between the 1970s and 1980s, the United States began manufacturing their Portland cement in
Michigan and Pennsylvania. Within a few years, most of the Portland cement used in the United
States was produced locally.
20) For a good concrete mix, aggregates need to be clean, hard, strong particles free of absorbed
chemicals o.
STUDY ON DURABILITY OF CONCRETE WHEN BLENDED WITH MICRO SILICA AND FLYASHIjripublishers Ijri
The environment in some concrete structures can become very acidic due to formation of sulphuric acid converted
from hydrogen sulphide by bacterial action. Significant deteriation of concrete in such harsh environments has
been reported world wide. Deteriotation of sewer system may result in serious problem such as the loss of ability to
transport sewerage, contamaniation of ground and ground water, excessive ground settelements.
Cement, one of the most essential building materials, is a compulsory agent that sets and hardens to hold to building units such as stones, bricks, tiles etc. Cement is a combination of composites consisting mainly of silicates and aluminates of calcium produced out of silica, calcium oxide, aluminum oxide and iron oxide. We can affirm that cement is a hydraulic substance made by finely crushing clinker together with Gypsum and other additives such as slag, and fly ash etc.
Latest Contemporary Construction Techniques and Materialsanishanaidu13
Please contact at anisha13naidu@gmail.com for the ppt and I will send it to you.
Latest building materials and technologies being used in development of hitech buildings in contemporary architecture of cities today
It consists of required concrete ingredients such as Cement, Fine Aggregate, coarse aggregate and water. Steps to reduce carbon footprint,Hydration of cement and M-sand introduction.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Damian Trevor is well known as a respected founder of Team Sun Construction Company which is based in Rancho Mirage, California.
According to Damian Trevor -
Homogeneous and perfect mixture of portland cement concrete and water gives strength and durability. Water quality must be good for that. Curing is also must homogeneous.
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Investing In The US As A Canadian… And How To Do It RIGHT!! (feat. Erwin Szet...Volition Properties
=== Investing In The US As A Canadian… And How To Do It RIGHT!! (feat. Erwin Szeto) ===
Ever been curious about Real Estate Investing in the US?? At Volition, for the past 14 years, we have been focused on helping investors invest in over $250M of real estate and generate $100M of wealth in the Toronto market, but we are always open to learning more about other business models and learning from other investors.
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2. Concrete is by far the most versatile and most widely used construction material worldwide. The
Romans are generally credited as being the first concrete engineers, but archaeological evidence says
otherwise. They had found a type of concrete dating to 6500 B.C. when stone-age Syrians used
permanent fire pits for heating and cooking. These fire pits showed a primitive form of calcining on the
exterior faces of the limestone rocks that lined the fire pits and led to the accidental discovery of lime as
a fundamental building material.
By 200 BC, the Romans were building very successfully using concrete, but it wasn’t like the concrete we
use today. It was not a plastic, flowing material poured into forms but more like cemented rubble. They
built large structures, such as the Roman Baths, the Pantheon, and the Colosseum, which still stands
today. As admixtures, they used animal fat, milk, and blood — materials that reflect very rudimentary
methods. After the top construction chemical company in India, smoked lime and pozzolana were
significantly reduced until the technique was all forgotten until the 14th century. From the 14th century
to the mid-18th century, the use of cement gradually returned. Finally, in 1824, Joseph Aspdin of
England invented Portland cement. Reinforced concrete was created in 1849 by Joseph Monier.
Classification
There are five different chemical admixtures: air-entraining, water-reducing, retarding, accelerating, and
plasticizers (superplasticizers). All other admixtures fall into the specialty category of concrete
admixture manufacturers, whose functions include corrosion inhibition, shrinkage reduction, alkali-
silica reactivity reduction, workability enhancement, damp proofing, and coloring.
3. Air-entraining admixtures are used to place microscopic air bubbles into the concrete purposely.
Water-reducing admixture usually reduces the required water content for a concrete mixture by about
5 to 10 percent. Consequently, construction material manufacturers containing a water-reducing
admixture need less water to reach a critical slump than untreated concrete. The treated concrete can
have a lower water-cement ratio. This usually indicates that it can produce a higher-strength concrete
without increasing the amount of cement.
Recent advancements in construction chemical suppliers have led to the development of mid-range
water reducers. These admixtures reduce water content by at least 8 percent and tend to be more
stable over a broader range of temperatures. In addition, mid-range water reducers provide more
consistent setting times than standard water reducers.
Retarding admixtures, which reduce the frame rate of concrete, prevent the accelerating impact of hot
weather on the concrete setting. High temperatures mostly create an enhanced rate of crystallization,
which performs placing and closing difficult. Retarders grasp concretely useful through placement and
delay the first set of concrete. Most retarders also function as water reducers and may entrain some air
in concrete.
Accelerating admixtures double the speed of initial strength development, decrease the time needed
for proper curing and stability, and advance the start of ending operations. Accelerating admixtures are
particularly helpful for changing the characteristics of concrete in cold weather.