Cracking susceptibility of concrete made with coarse recycled concrete aggregates

Matthew P. Adams, Tengfei Fu, Adal Guerra Cabrera, Monica Morales, Jason H. Ideker, O. Burkan Isgor

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)802-810
Number of pages9
JournalConstruction and Building Materials
Volume102
DOIs
StatePublished - Jan 2016

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

Keywords

  • Aggregate
  • Concrete
  • Drying shrinkage
  • Recycled concrete aggregate
  • Restrained cracking
  • Sustainable construction

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