Research on the Apparent Thermal Expansion Coefficient of Concrete Subject to Freeze-Thaw Cycles and Chloride Salt Attack

Abstract:

The aim of the research is to determine the strain-temperature rate and investigate the apparent thermal expansion coefficient of three kinds of concrete (ATEC). The strain of concrete with the dimension of 100mm×100mm×100mm subject to freeze-thaw cycles and chloride salt attack were measured using an embedded strain gauge. The ATEC was calculated from the strain-temperature rate using linear regression. The results show that the absolute value of ATEC of specimen saturated by 3.5 wt. % chloride salt solution was reducing with the progress of freeze-thaw cycles. However, the ATEC of the dried specimen subject to heating and cooling is independent from water to cement ratio, and approximately maintains the same level during the whole heating and cooling cycle, and the ATEC of air-entrained specimen is constant within 20 cycles. Overall, deterioration of concrete matrix can be evaluated by apparent thermal expansion coefficient besides weight loss and dynamic elastic modulus.

• Periodical: Advanced Materials Research (Volumes 446-449)
• Pages: 3304-3310
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.446-449.3304
• Online since: January 2012
• Authors: Zhen Di Wang, Yan Yao, Ling Wang
• Keywords: Apparent Thermal Expansion Coefficient, Chloride Salt, Freeze-Thaw Cycle

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