Effects of Recycled Aggregates on Water-Cement Ratio for Concrete

Author:

Choong Wee Kang1,Leong Lau Teck1,Sin Choon Seng1,Ali Mohamed Abdullahi1

Affiliation:

1. University of Nottingham Malaysia Campus

Abstract

Recycled aggregate differs from primary aggregate in that it constitutes of two types of materials: the primary aggregate and the attaching cement mortar. This study was conducted in order to investigate the effects on water-cement ratio for concrete cast with recycled aggregates derived from different origins (hollow blocks & structural concrete elements) and different mixed proportions of recycled aggregate contents. The outcomes of test indicate that higher water cement ratios are required for concrete cast with recycled aggregates as compare to those cast with primary aggregates. Also there appear no obvious relationships or consistencies that can be drawn among types of recycled aggregate.

Publisher

Trans Tech Publications, Ltd.

Reference6 articles.

1. T.C. Hansen and H. Narud: Strength of Recycled Concrete Made from Crushed Concrete Coarse Aggregate, (2003).

2. S. Hasaba, M. Kawamura, K. Torik, K. Takemoto: Dry Shrinkage and Durability of Concrete Made from Recycled Aggregate (Transactions of the Japan Concrete Institute, 3, 1981, pp.55-60).

3. A.M. Neville: Properties of Concrete, 4th ed., (2002).

4. C.S. Poon, Z.H. Shui, L. Lam, H. Fok & S.C. Kou: Influence of moisture states of natural & RA on the slump & compressive strength of concrete, Cement and Concrete Research 34(2004) pp.31-36.

5. T. Mukai and H. Koizumi: Study on Reuse of Waste Concrete for Aggregate of Concrete, Japan-US Cooperative Service Programme, San Francisco, (1979).

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