Preparation and Crack Resistance Test of High Performance Concrete with Fiber Hybrid and Micro Expansion Freezing Shaft Lining

Preparation and Crack Resistance Test of High Performance Concrete with Fiber Hybrid and Micro Expansion Freezing Shaft Lining

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To solve the leakage problem of concrete cracking and seepage in the freezing shaft lining of deep topsoil, it is proposed to use hybrid fibers and micro expansion high-performance concrete.Based on the normal concrete mix ratio of the frozen shaft lining, the orthogonal test method was used to investigate the effect of the water-to-binder ratio, the amount of expansion agent, the amount click here of polyvinyl alcohol fiber and the amount of imitation steel fiber on the compressive strength and splitting tensile strength of fiber hybrid and micro expansion high performance concrete.Comprehensive balance determines that the best mix ratio of this test is water: cement: NF-F: expansion agent: polyvinyl alcohol fiber: polypropylene imitation steel fiber: sand: basalt grandpas best gravel =166.112:410:130:32.

8:1.092:5:615.992:1 095.096.

The crack resistance test results show that the fiber hybrid and expansion agent composite concrete has excellent crack resistance.