Effect of lightweight aggregates on the mechanical properties and brittleness of lightweight aggregate concrete

H. Z. Cui, Tommy Yiu Lo, Shazim Ali Memon, Weiting Xu

Research output: Contribution to journalArticle

86 Citations (Scopus)

Abstract

The influence of volume fraction and aggregate properties on the mechanical performance of lightweight aggregate concrete (LWAC) were studied. A new Shape Index that described the shape characteristics of lightweight aggregate (LWA) has been proposed and its effects on resulting LWAC were evaluated. Test results substantiate that the proposed Shape Index had a great influence on the mechanical properties of LWAC. Crack development, failure characteristics and stress strain curves of LWAC were studied and the concept of the proportional strain ratio was introduced to evaluate the brittleness of LWAC. Test results showed that higher volume content of LWA resulted in a more brittle failure. It was also found out that for similar concrete strengths, LWAC was comparatively brittle than normal weight concrete (NWC).

Original languageEnglish
Pages (from-to)149-158
Number of pages10
JournalConstruction and Building Materials
Volume35
DOIs
Publication statusPublished - Oct 1 2012
Externally publishedYes

Keywords

  • Compressive strength
  • Lightweight aggregate concrete
  • Proportional strain ratio
  • Shape Index
  • Young's modulus

ASJC Scopus subject areas

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

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