Effect of Straw Fiber on Frost Resistance of Concrete Composites
This paper explores the frost resistance of straw fiber reinforced concrete under freeze-thaw cycle damage,and selects composite Portland cement,silica fume,water reducer,rape straw and other raw materials to prepare straw fiber,and the straw fiber content is 2.5%,5.0%and 7.5%,respectively,to prepare straw fiber reinforced concrete specimens,and the compressive strength,mass loss rate and dynamic elastic modulus of the specimens are tested under different freeze-thaw cycles.The results show that the number of freeze-thaw cycles affects the compressive strength,mass loss rate and dynamic elastic modulus of the specimen.With the increase of freeze-thaw cycles,the compressive strength and dynamic elastic modulus of straw fiber reinforced concrete decrease significantly with the increase of the number of freeze-thaw cycles,and the smaller the straw fiber content,the higher the mass loss rate of the specimen.
Straw fiberConcreteFreeze-thaw cycle damageCompressive strengthQuality loss rate
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