Use of wastes derived from earthquakes for the production of concrete masonry partition wall blocks

Zhao Xiao, Tung Chai Ling, Shi Cong Kou, Qingyuan Wang, Chi Sun Poon

Research output: Journal article publicationJournal articleAcademic researchpeer-review

57 Citations (Scopus)


Utilization of construction and demolition (C&D) wastes as recycled aggregates in the production of concrete and concrete products have attracted much attention in recent years. However, the presence of large quantities of crushed clay brick in some the C&D waste streams (e.g. waste derived collapsed masonry buildings after an earthquake) renders the recycled aggregates unsuitable for high grade use. One possibility is to make use of the low grade recycled aggregates for concrete block production. In this paper, we report the results of a comprehensive study to assess the feasibility of using crushed clay brick as coarse and fine aggregates in concrete masonry block production. The effects of the content of crushed coarse and fine clay brick aggregates (CBA) on the mechanical properties of non-structural concrete block were quantified. From the experimental test results, it was observed that incorporating the crushed clay brick aggregates had a significant influence on the properties of blocks. The hardened density and drying shrinkage of the block specimens decreased with an increase in CBA content. The use of CBA increased the water absorption of block specimens. The results suggested that the amount of crushed clay brick to be used in concrete masonry blocks should be controlled at less than 25% (coarse aggregate) and within 50-75% for fine aggregates.
Original languageEnglish
Pages (from-to)1859-1866
Number of pages8
JournalWaste Management
Issue number8
Publication statusPublished - 1 Aug 2011


  • Construction and demolition waste
  • Crushed clay brick
  • Partition wall blocks
  • Recycled concrete aggregate
  • Strength

ASJC Scopus subject areas

  • Waste Management and Disposal


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