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IJSTR >> Volume 2- Issue 6, June 2013 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



Waste And By-Products Recycled For Concrete

[Full Text]

 

AUTHOR(S)

Bourmatte Nadjoua, Houari Hacene

 

KEYWORDS

Keywords : recycled aggregates, waste, brick,concrete demolition, recycled aggregate concrete

 

ABSTRACT

Abstract: The industry of building materials is always accompanied by secondary products or waste which have an incidence on the environment. The management of solid waste is one of main environmental concerns in the world. With the rarity of the space of discharge, the use of waste became an interesting alternative in the elimination ; the research is led on the use of waste and concrete products, it is not only economic, but also help to reduce the problems of elimination, the research program thus includes the works concerning the valuation of the waste of construction/demolition and under products, as well as on the development of new materials and products : mortar or concrete with these recycled aggregates. We present in this article the results of a vast experimental program dedicated to the study of a variety of mortars and concretes with substitution aggregates waste (of construction / demolition) and under products. We chose as basic parameters: • The origin of the waste (of bricks) or of (concrete of demolition) • The substitution rate recycled aggregates : 0% - 25% - 50% - 100% • The variation of the dosage in cement: 250 - 350 and 450 Kg / m³. By studying these parameters, we were able to observe the behaviour to the state of fresh and hardened various materials developed with the recycled aggregates. The recycled concrete aggregates are generally more absorbent and less dense than the ordinary aggregates.the shape of aggregates is similar to that of the crushed stone. Concretes made with aggregates resulting from the recycling present good qualities of handiness, durability and resistance in the action of the freeze-thaw. the compressive strength varies according to the initial resistance and the relationship water/cement of the new concrete. As for any new source of aggregates, it is necessary to control the durability, the sise grading and the properties of aggregates.

 

REFERENCES

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