Research on Mix Proportion of ECC with Low Drying Shrinkage

YAO Zhongyong

doi:10.13204/j.gyjzG20110912

Volume 52 Issue 3

Jul. 2022

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YAO Zhongyong. Research on Mix Proportion of ECC with Low Drying Shrinkage[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(3): 171-176,215. doi: 10.13204/j.gyjzG20110912

Citation:

YAO Zhongyong. Research on Mix Proportion of ECC with Low Drying Shrinkage[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(3): 171-176,215. doi: 10.13204/j.gyjzG20110912

YAO Zhongyong. Research on Mix Proportion of ECC with Low Drying Shrinkage[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(3): 171-176,215. doi: 10.13204/j.gyjzG20110912

Citation:

YAO Zhongyong. Research on Mix Proportion of ECC with Low Drying Shrinkage[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(3): 171-176,215. doi: 10.13204/j.gyjzG20110912

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Research on Mix Proportion of ECC with Low Drying Shrinkage

doi: 10.13204/j.gyjzG20110912

YAO Zhongyong

Urban and Rural Construction and Transportation Service Center in Pingtan Comprehensive Experimental Zone, Fuzhou 350400, China

Received Date: 2020-11-09

Abstract

Abstract

In order to reduce the drying shrinkage strain of traditional ECC and the shrinkage difference between concrete and ECC, firstly the paper determined the water-binder ratio and sand-rubber ratio, so that the ECC’s dimensional change rate was coordinated with the concrete deformation; secondly, the effects of fly ash content, mineral powder content and PVA fiber content on ECC drying shrinkage rate were studied based on orthogonal method, the drying shrinkage value was further optimized. Finally, the tensile, compression, and bending properties of the ECC were studied to ensure the mechanical properties of structural members. The results showed that the shrinkage strain of ECC increased with the increase of water-binder ratio and sand-rubber ratio, and the effect of water-binder ratio on drying shrinkage was much greater than that of sand-rubber ratio; in addition, the shrinkage value decreased with the increase of fly ash content, mineral powder content and PVA fiber content. Among them, fly ash had the best inhibitory effect on drying shrinkage, followed by mineral powder, and PVA fiber had the smallest effect on it. The compressive strength of the ECC with low drying shrinkage could reach 44.5 MPa, and the tensile and flexural strengths reached 2.5 MPa and 10 MPa respectively, and the ultimate tensile strain was stable more than 3%.
- ECC,
- drying shrinkage,
- mix proportion,
- orthogonal method,
- mechanical properties

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References(20)

References

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