Cracking susceptibility of concrete made with coarse recycled concrete aggregates

Document Type

Article

Publication Date

1-15-2016

Abstract

This study tested the hypothesis that concrete produced with recycled concrete aggregate (RCA) has increased cracking resistance compared to concrete incorporating natural aggregates. Two sources of RCA were used: (1) a laboratory created RCA produced by crushing previously produced laboratory concrete; and (2) a field RCA obtained from a demolished airfield pavement. Mechanical properties, and shrinkage and cracking due to drying of concrete produced with RCA replacement were studied. Adequate compressive strength (39.3-43.4 MPa), splitting tensile strength (3.7-4.4 MPa), and modulus of elasticity (27.2-28.3 GPa) were obtained in mixtures including coarse RCA, even at 100% replacement levels. The use of RCA did not significantly increase the drying shrinkage of concrete. It was shown that the use of RCA significantly reduced the cracking risk of concrete from "high" to "moderate-high" when incorporated into a high cracking risk mixture.

Identifier

84947062345 (Scopus)

Publication Title

Construction and Building Materials

External Full Text Location

https://doi.org/10.1016/j.conbuildmat.2015.11.022

ISSN

09500618

First Page

802

Last Page

810

Volume

102

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