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

doi:10.1016/j.conbuildmat.2012.02.053

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 journal › Article

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 language	English
Pages (from-to)	149-158
Number of pages	10
Journal	Construction and Building Materials
Volume	35
DOIs	https://doi.org/10.1016/j.conbuildmat.2012.02.053
Publication status	Published - Oct 1 2012
Externally published	Yes

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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10.1016/j.conbuildmat.2012.02.053

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Cui, H. Z., Lo, T. Y., Memon, S. A., & Xu, W. (2012). Effect of lightweight aggregates on the mechanical properties and brittleness of lightweight aggregate concrete. Construction and Building Materials, 35, 149-158. https://doi.org/10.1016/j.conbuildmat.2012.02.053

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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).",

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