In order to improve the workability and crack resistance of abrasion resistant concrete,and prolong the service life of lining concrete of spillway building,a new type of anti-crack viscosity reducer is selected.Taking the con-crete mixed with silica fume,fiber and HF agent as the comparison object,the working performance,mechanical proper-ties,abrasion resistance and crack resistance of four kinds of concrete are compared and analyzed.The results show that the plastic viscosity of abrasion-resistant concrete can be greatly reduced and the construction performance of concrete can be improved by adding anti-crack and viscosity reducer.On the whole,the compressive strength and tensile strength of concrete mixed with silica fume and anti-crack and viscosity reducer are better than those of other concrete,and the abra-sion resistance is 40%higher than that of HF concrete.As far as cracking resistance is concerned,silica fume+fiber con-crete>silica fume+anti-cracking viscosity reducer concrete>HF concrete.Therefore,the anti-cracking and viscosity reducer can effectively reduce the viscosity of abrasion-resistant concrete,improve the mechanical properties and abrasion-resistant strength,and reduce the risk of early cracking.
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