Materials characteristics affecting CO2curing of concrete blocks containing recycled aggregates

Bao Jian Zhan, Chi Sun Poon, Cai Jun Shi

Research output: Journal article publicationJournal articleAcademic researchpeer-review

59 Citations (Scopus)

Abstract

In order to enhance the CO2curing efficiency of concrete block prepared with recycled aggregates, several material characteristics of the concrete block including moisture content, bulk density, aggregate to cement ratio, recycled aggregate content and types of binders, were studied experimentally to assess their effects on the CO2curing process. The results indicated that, during 2 h of CO2curing period, the moisture content and aggregate to cement ratio of the prepared blocks had significant effects on the CO2curing degree and the compressive strength. Appropriate pre-drying of the block specimens before CO2curing enabled the maximum curing degree, and the compressive strength attained was comparable or superior to that of the 6 h steam cured blocks. The bulk density and recycled aggregate content of the prepared blocks would also influence the CO2curing degree, but their effects on compressive strength were more complex. It was confirmed that the presence of recycled aggregate in the concrete blocks can promote the CO2curing efficiency.
Original languageEnglish
Pages (from-to)50-59
Number of pages10
JournalCement and Concrete Composites
Volume67
DOIs
Publication statusPublished - 1 Mar 2016

Keywords

  • CO2 curing
  • Concrete block
  • Curing degree
  • Recycled aggregate
  • Strength

ASJC Scopus subject areas

  • Building and Construction
  • Materials Science(all)

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