Enhancing Early-age Properties of Self-Curing Recycled Aggregate Concrete

Document Type : Original Article

Authors

1 Civil Engineer

2 Civil Engineering department, faculty of Engineering, Menoufia University, Shebeen El-koom, Menoufia, Egypt.

3 Civil Engineering department, faculty of Engineering, Menoufia University, Shebeen El-koom, Menoufia, Egypt

Abstract

Recycled aggregate self-curing concrete is one of the new concrete types. It does not need to be cured using traditional curing techniques. Rather than using traditional natural coarse aggregates, it is composed of coarse recycled aggregates. To build water supply reservoirs in the concrete and continue the hydration process, some recycled aggregates can hold large amounts of water that are not included in the mixing water. This research aims to enhance self-curing recycled aggregate concrete's early-age properties. The early-age properties of concrete are discussed in terms of slump values, plastic shrinkage settlement test, and plastic shrinkage panel test. The hardened concrete properties are noted in terms of compressive strength, tensile splitting strength, flexural strength, and bond strength (7, 28, and 56 days). Test results indicated that, in comparison to concrete cast using dolomite as natural aggregate, using recycled aggregate minimizes plastic shrinkage and plastic shrinkage cracks. Using polyethylene glycol (PEG400) and super absorbent polymer (SAP) as chemical curing agents also reduces plastic shrinkage and plastic shrinkage cracks in concrete.

Keywords

ERJ. Engineering Research Journal

Articles in Press, Accepted Manuscript
Available Online from 18 July 2024

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