Analysis on Effect of Mixed PP Fiber on Properties of Alkali Slag Concrete
Traditional cement concrete is replaced by alkali slag concrete and PP fiber is added to explore the effects of single coarse PP fiber and mixed coarse and fine PP fiber on flow properties,mechanical properties,splitting tensile properties and shrinkage properties of alkali slag concrete.The results show that the addition of PP fiber has a negative effect on the fluidity of concrete,but the mechanical properties and splitting tensile properties are improved in different degrees.Under the mixing condition,the maximum splitting tensile strength of 7 days and 28 days was increased by 19.41％and 23.30％,respectively.The shrinkage and creep of group B2 at 7 days and 28 days were decreased by 14.29％and 20.58％compared with control group,respectively.Mixing PP fiber can effectively improve the mechanical properties of alkali slag concrete and alleviate the shrinkage cracking in the early strength development process.
国家科技期刊平台
NSTL
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