Fundamental behavior of recycled aggregate concrete - Overview I: Strength and deformation

Jianzhuang Xiao, Chi Sun Poon, Yuyin Wang, Yuxi Zhao, Tao Ding, Yue Geng, Taohua Ye, Long Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

Recycled aggregate concrete (RAC) has received huge attention in the past two decades. However, there are still many critical problems about fundamental behaviors of RAC which need to be figured out and otherwise limit its further sustainable popularization. Therefore, this series of two overviews re-think fundamental behaviors of RAC based on the latest literatures. In this overview (Part 1), the strength development and its mechanism as well as failure patterns of RAC under static and dynamic loadings are explored. Then, the influencing factors and prediction models of elastic modulus, shrinkage, and creep of RAC are intensively discussed. It is found that compared with natural aggregate concrete (NAC), the 28-day compressive strength of RAC is lower, whereas long-term compressive strength of RAC may be higher, which partly depends on the strength of parent concrete. Furthermore, because the elastic modulus of RAC is often decreased, the drying shrinkage and creep of RAC are always increased. However, the autogenous shrinkage of RAC can be decreased, and also it generally develops for above 60 days. Finally, some models have been summarized to better predict the elastic modulus and long-term deformation of RAC.

Original languageEnglish
JournalMagazine of Concrete Research
DOIs
Publication statusAccepted/In press - 2022

Keywords

  • Compressive strength
  • Concrete with recycled aggregates
  • Deformation
  • Recycled concrete aggregate

ASJC Scopus subject areas

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

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