Constitutive relations of coral aggregate concrete under uniaxial and triaxial compression. (10th August 2020)

• Record Type: Journal Article
• Authors: Zhou, Wen; Feng, Peng; Lin, Hongwei
• Is Part Of: Construction & building materials. Volume 251(2020)
• Publication Date: 2020-08-10
• Subjects: fc uniaxial compressive strength of prism concrete specimen with a geometrical size of 100 mm×100 mm×300 mm -- fco uniaxial compressive strength of cylinder concrete specimen with a geometrical size of Φ50 mm×100 mm -- fcu uniaxial compressive strength of cubic concrete specimen with a geometrical size of 100 mm×100 mm×100 mm -- fl lateral pressure applied to concrete specimen in conventional compression test -- fcc compressive strength of concrete specimen under lateral pressure; Coral aggregate concrete -- Uniaxial compression -- Triaxial compression -- Constitutive model -- Failure criterion; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2020.118957
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Porous and low strength nature of coral result in special properties of CAC. Constitutive models were suggested for CAC under uniaxial and triaxial compression. A failure criterion for LAC was proved to be applicable to CAC under compression. Abstract: Coral aggregates can replace natural aggregates in marine construction, substantially reducing construction costs and shortening construction period. This paper investigates the compression behavior of coral aggregate concrete (CAC) under uniaxial and triaxial loading, wherein lightweight aggregate concrete (LAC) and normal aggregate concrete (NAC) are used for comparison. The investigated variables include concrete type, concrete strength, lateral pressure and principal stress ratios. The results indicated that the compression behaviors of CAC were different from those of NAC but similar to those of LAC because coral aggregates are more porous and have lower strength than normal aggregates. Based on the test results from this paper and literature studies, constitutive models were suggested for CAC under uniaxial and conventional triaxial compression. Moreover, a failure criterion for LAC proposed in the literature was deemed applicable to CAC under active or passive confinement. The suggested models correlated well with the test results.