Abstract: Alkali-activated slag geopolymers have some weaknesses, such as high brittleness, poor toughness, and easy to crack. In this study, fiber/hybrid fibers were used to modify the slag geopolymer. The flexural strength and flexural toughness of the fiber slag geopolymer composites were taken as an index to analyze the reinforcing and toughening effect of three single fibers and two kinds of hybrid fibers on the slag geopolymers. The results indicate that the reinforcing effect of carbon fiber is better than that of steel fiber and basalt fiber, and the toughening effect of steel fiber is better than the others, whereas basalt fiber has relatively poor performance in both reinforcing and toughening effect.Mixing carbon fiber and steel fiber can give full play to the reinforcing effect of carbon fiber and the toughening effect of steel fiber, and adding appropriate amount of mixed fiber will make the materials better in both strength and toughness than the single fiber; The unit weight difference between fiber and slurry has an important effect on the homogenization of the slag geopolymer. The mixture of carbon fiber and steel fiber can significantly reduce the flexural strength and flexural toughness of slag geopolymers under different loading directions.
宋学锋,王骏,王艳. 纤维/混杂纤维-矿渣地质聚合物复合材料的弯曲强度与弯曲韧性*[J]. 材料导报编辑部, 2017, 31(22): 121-124.
SONG Xuefeng, WANG Jun, WANG Yan. Flexural Strength and Flexural Toughness of Fiber/Hybrid Fibers and Slag geopolymers Composites. Materials Reports, 2017, 31(22): 121-124.
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2017, Vol. 31 
