Experimental study on CO2curing for enhancement of recycled aggregate properties

Baojian Zhan, Chi Sun Poon, Qiong Liu, Shicong Kou, Caijun Shi

Research output: Journal article publicationJournal articleAcademic researchpeer-review

114 Citations (Scopus)

Abstract

In this paper, the results of an experimental program on studying the use of a carbonation process to enhance the properties of recycled aggregates are presented. Hardened concretes prepared by using different water-to-cement ratios in the laboratory, were crushed to produce recycled aggregates with different particle sizes. Before and after the laboratory carbonation process, the physical properties of the recycled aggregate, including water absorption and density were determined. The extent of CO2curing of the recycled aggregate was quantified by assessing the carbonation percentage of the aggregates. Carbonation resulted in reduction in water absorption values and increase in density and these showed that the properties of recycled aggregate were improved. The factors influencing the CO2curing process, including curing time, particle size and moisture contents of the recycled aggregate, were investigated.
Original languageEnglish
Pages (from-to)3-7
Number of pages5
JournalConstruction and Building Materials
Volume67
DOIs
Publication statusPublished - 1 Jan 2014

Keywords

  • CO curing 2
  • Improvement
  • Properties
  • Recycled aggregate

ASJC Scopus subject areas

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

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