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Matrix design for waterproof Engineered Cementitious Composites (ECCs)
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DOI：10.1016/j.conbuildmat.2017.02.076.png)
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摘要
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The excellent crack control capability of Engineered Cementitious Composites (ECCs) is exceedingly beneficial for waterproofing applications. To design a suitable ECC matrix for waterproofing applications, waterproofing admixture (WPA) was added to improve the wetting property and reduce the sorptivity, and shrinkage-reducing admixture (SRA) together with calcium sulfoaluminate cement (SAC) were introduced to control the drying shrinkage. A comprehensive experimental program was conducted to optimize the use of WPA, SRA and SAC. Moreover, the water permeability of both un-cracked and cracked ECCs were examined. This work finally developed a kind of waterproof ECC, with 28-day compressive strength around 35 MPa, ultimate tensile strain over 4%, a water contact angle larger than 110 degree, 28-day drying shrinkage about 2/3 the value of the typical ECC (M45), a water absorption rate around 5 x 10(-5) mm/s(1/2) and a water permeability coefficient about 8 x 10(-12) m/s. The findings of this research should be rewarding for the design of ECCs for waterproofing applications. (C) 2017 Elsevier Ltd. All rights reserved.
Keyword:
ECC
Matrix
Waterproofing
Wetting property
Sorptivity
Water permeability
Drying Shrinkage
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8
论文数:
4.5W
被引数:
27.9W
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