Stress-Strain Properties of Engineered Cementitious Composites (ECC) Exposed to Sulfate Dry-Wet Cycle

Abstract:

The brittleness and easiness to crack expose marine concrete to serious durability issues. Engineered Cementitious Composites (ECC), as a new generation of ultra high performance concrete, is expected to overcome the strain-softening properties of traditional concrete and realize function of crack-width control. In this paper, the sulfate erosion of ECC under drying-wetting cycles was modelled in laboratory test. And the compression test on cylinders after exposure to different erosion cycles was implemented to obtain the stress-strain properties. The results disclose that sulfate erosion imposes significant influence on both the nonlinear ascending and descending portions of the stress-strain properties of ECC. As the erosion period extended, ECC strength undergoes an obvious increase. And the descending section of the eroded ECC shows a significant stress drop, which is quite different from that before erosion. Additionally, a simple analytical model was proposed to provide satisfactory prediction of the stress-strain properties of ECC exposed to sulfate erosion.

• Periodical: Key Engineering Materials (Volume 858)
• Pages: 182-187
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.858.182
• Online since: August 2020
• Authors: Yu Dong Han, Zhen Bo Wang*, Zi Jie Hong, Jian Ping Zuo, Chang Liu, Zi Shan Zhang
• Keywords: Drying-Wetting Cycles, Engineered Cementitious Composites, Stress-Strain, Sulfate Attack

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