Mechanical properties of ultra-lightweight cement composite at low temperatures of 0 to −60 °C

Liu, Xuemei, Zhang, Min-Hong, Chia, Kok Seng, Yan, Jiabao, & Liew, J.Y. Richard (2016) Mechanical properties of ultra-lightweight cement composite at low temperatures of 0 to −60 °C. Cement and Concrete Composites, 73, pp. 289-298.

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Abstract

This paper presents an experimental study on mechanical properties of an innovative ultra-lightweight cement composite (ULCC) at low temperatures down to −60 °C in comparison with those at ambient temperature. Those properties include stress-strain curve, ultimate strength, elastic modulus, Poisson ratio, and flexural tensile behavior. Effect of curing condition is also evaluated. In addition, the performance of the ULCC is compared with that of a normal weight concrete (NWC) and a lightweight concrete (LWC) with similar 28-day compressive strength. The cylindrical compressive strength of the NWC and LWC was increased generally with the reduction in temperature. However, the same phenomenon was not observed for the ULCC. The elastic modulus of the ULCC did not change much, whereas the elastic modulus of the NWC increased significantly with the reduction of temperature from 30 °C to −60 °C. Strain of the ULCC at the peak load was generally much higher than that of the NWC and LWC, and was generally not affected by the temperature. The flexural strength of the three concretes was increased with the reduction in temperature. Duration of the moist curing did not affect the performance of the ULCC under compression significantly, but influenced its flexural strength significantly.

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ID Code: 98310
Item Type: Journal Article
Refereed: Yes
Keywords: Ultra-lightweight cement composite, Concrete, Arctic offshore structure, Stress, Strain, Strength, Low temperature
DOI: 10.1016/j.cemconcomp.2016.05.014
ISSN: 0958-9465
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Structural Engineering (090506)
Divisions: Current > Schools > School of Civil Engineering & Built Environment
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Funding:
  • ASTAR/0921420044
Copyright Owner: Copyright 2016 Elsevier Ltd.
Deposited On: 25 Aug 2016 22:17
Last Modified: 28 Aug 2016 22:30

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