Abstract
This paper adopts panel constraint method to research the influence of different mixing amount of polyacrylonitrile fiber on plastic cracking of mortar. The research result shows that polyacrylonitrile fiber can prevent cracking and refine the cracks, and the effect will become more obvious with increase of its mixed amount. When the mixed fiber in mortar is more than 1.0kg/m3, the crack can be reduced to more than 90%. The best mixed amount of polyacrylonitrile fiber in mortar is 1~1.5kg/m3. This experimental result can provide theoretical basis for improving anti-cracking performance of mortar or concrete.
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