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Evaluation of Coarse Recycled Concrete Aggregates Effect on the Properties of Fresh and Hardened Concrete by Adem Ait Mohamed Amer; Karim Ezziane; M’Hamed Adjoudj is a Engineering article available to read on EtoBox.

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This study presented is interested to identify the influence of the use of recycled concrete aggregates (RCA) on mechanical properties (compressive strength, tensile and Modulus of elasticity), rheological properties (workability, yield stress, and plastic viscosity), and total shrinkage of concrete. Coarse ordinary aggregates (COA) are partially substituted with RCA and an amount of superplasticizer has been added to keep the same workability. The results obtained indicate a positive effect of the recycled aggregates on the mechanical strengths. This effect is closely linked to the w/c ratio, the dosage of superplasticizer, and the percentage of substitution. Concrete mixtures with RCA record the highest values of rheological properties and large values of total shrinkage which depends on the w/c ratio. Correlations and mathematical relationships are proposed to express the variation in mechanical properties and those of total shrinkage as a function of the concrete composition.

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Author

Adem Ait Mohamed Amer; Karim Ezziane; M’Hamed Adjoudj

Publisher

Springer Science and Business Media LLC

Published

2021

Language

EN

Field

Engineering (Physical Sciences)