THE CHARACTERISTICS OF BRICK AGGREGATE CONCRETE ON A BASIS OF DRY DENSITY AND DURABILITY
DOI:
https://doi.org/10.11113/mjce.v28.15704Keywords:
Concrete, density, absorption, void, compressive strength, aggregate, water cement ratio, water permeability, RCPTAbstract
The most remarkable building material-concrete is generally designed to carry compressive loading. Concrete must be sufficiently durable in order to prevent penetration of corrosive elements through its surface. The mechanical properties of concrete are highly influenced by its density. A denser concrete generally provides higher strength and fewer amount of voids and porosity. Smaller the voids in concrete, it becomes less permeable to water and soluble elements. So water absorption will also be less and better durability is expected from this type of concrete. Water, containing harmful elements leads to corrosion of reinforcement embedded in concrete. Water itself is also vulnerable to embedded steel within concrete. A minimum water cement ratio is desired to maintain appropriate strength and durability of concrete. In this paper an experimental program conducting on compressive strength, density, absorption capacity and percent voids of hardened concrete is described. The variation of these properties with maturity of concrete was main focus of this experiment. Also, water and chloride permeability of commonly practiced concrete mixes are also evaluated through this paper. Comparison is made between two types of concrete’s property test results. One of them is lightweight concrete made with crushed brick (BC) as primary coarse aggregate. Crushed brick is a locally available construction material in Indian subcontinent. Another type of concrete is a denser one, made with crushed stone (SC) as primary coarse aggregate. The comparisons on test results are presented with respect to time and water cement ratios. It was observed from the experiment that, strength and density increases with maturity of concrete and percent void and absorption capacity decreases with time. Better results were obtained from stone aggregate concrete than brick aggregate concrete in cases of all of the tests. A minimum water cement ratio is also recommended to ensure minimum level of durability through this paper.References
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