Mechanical properties of sea sand recycled aggregate concrete under axial compression. (30th June 2018)

• Record Type: Journal Article
• Authors: Huang, Yijie; He, Xujia; Wang, Qing; Sun, Yuedong
• Is Part Of: Construction & building materials. Volume 175(2018)
• Page Start: 55
• Page End: 63
• Publication Date: 2018-06-30
• Subjects: Sea sand recycled aggregate concrete -- Recycled coarse aggregate (RCA) -- Sea sand -- Mechanical behavior -- Stress-strain curve; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2018.04.136
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: The failure process of SSRAC was influenced by the RCA and SS. The compressive strength of SSRAC was higher than that of ordinary concrete. The effect of SS Cl − on the elastic modulus decreased with increasing RCA content. Expressions for the stress-strain relation of SSRAC were obtained. Abstract: The properties of axially loaded sea sand recycled aggregate concrete (SSRAC) were experimentally and theoretically investigated in this paper. The main parameters in the test are the sea sand chloride ions (Cl − ) content and the recycled coarse aggregate (RCA) replacement percentage. The influences of sea sand Cl − and RCA content on the compressive strength, stress-strain relation and failure pattern of SSRAC were studied. Test results showed that both the strength and deformation of specimen changed with the variation of sea sand Cl − content and RCA replacement percentage. The compressive strength of SSRAC was higher than that of ordinary concrete. The elastic modulus increased, while the peak strain decreased due to the effect of sea sand. It was also indicated that the influence of recycled coarse aggregate replacement percentage on the properties of SSRAC decreased with increasing sea sand Cl − content. The Poisson's ratio and stress-strain curve of SSRAC were similar to those of ordinary concrete. Finally, a numerical expression for the stress-strain curves of SSRAC under axial loading was presented, which could be used in the theoretical and practical studies.