Bulletin of the Chinese Ceramic Society, Volume. 42, Issue 11, 3836(2023)
Effect of SAP on Properties of High Performance Engineered Cementitious Composites
High shrinkage is one of the bottlenecks limiting the large-scale engineering application of high performance engineered cementitious composites (HP-ECC). This work alleviated the shrinkage of HP-ECC by introducing superabsorbent polymers (SAP). The effects of different amounts of SAP on the compressive strengthflexural strengthtensile propertiesautogenous shrinkage and dry shrinkage properties of HP-ECC were investigated. Scanning electron microscopy (SEM) was used to observe the changes in fiber surface morphology after stretching of HP-ECC caused by SAP. The results show that the addition of SAP reduces the compressive strength and flexural strength of HP-ECC and alleviates autogenous shrinkage and dry shrinkageand the autogenous shrinkage and dry shrinkage decreases with the increase of SAP content. MoreoverSAP reduces the tensile strength of HP-ECC and increases the tensile strain of HP-ECC. The incorporation of SAP reduces the fracture toughness of the matrixmaking it more prone to microcracksthereby improving the strain hardening behavior and multiple cracking of HP-ECC. It is observed that with the increase of SAP contentthe surface morphology of the fibers as they are pulled out of the matrix becomes smootherindicating a decreasing in fiber matrix interface adhesion.
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JIANG Aiguo, YANG Weibin, CAI Jie. Effect of SAP on Properties of High Performance Engineered Cementitious Composites[J]. Bulletin of the Chinese Ceramic Society, 2023, 42(11): 3836
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Received: Jun. 25, 2023
Accepted: --
Published Online: Dec. 11, 2023
The Author Email: Aiguo JIANG (707441997@qq.com)
CSTR:32186.14.