Fly ash lightweight aggregates in high performance concrete

Lightweight aggregates have been manufactured by sintering fly ash and crushing the product into suitable sizes. These aggregates possess unique characteristics that make them suitable for high strength and high performance concrete. Concrete produced using these aggregates is around 22% lighter and...

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Published in:Construction & building materials 2008-12, Vol.22 (12), p.2393-2399
Main Author: Kayali, O.
Format: Article
Language:English
Subjects:
Aggregates
Composition
Concrete
Durability
Fly ash
High strength
Lightweight
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description Lightweight aggregates have been manufactured by sintering fly ash and crushing the product into suitable sizes. These aggregates possess unique characteristics that make them suitable for high strength and high performance concrete. Concrete produced using these aggregates is around 22% lighter and at the same time 20% stronger than normal weight aggregate concrete. Drying shrinkage is around 33% less than that of normal weight concrete. Moreover, the aggregates possess high durability characteristics required in high performance structures. The importance of the new aggregates lies mostly in the fact that superior qualities are achieved without having to increase the cement content. Thus it is possible to reduce the amount of cement by as much as 20% without affecting the required strength. Weight reduction may reduce precast concrete transportation costs as well as provide slender and spacious construction. Utilising fly ash to produce quality aggregates should yield significant environmental benefits.
doi_str_mv 10.1016/j.conbuildmat.2007.09.001
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source ScienceDirect Journals
subjects Aggregates
Composition
Concrete
Durability
Fly ash
High strength
Lightweight
title Fly ash lightweight aggregates in high performance concrete
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