The early damage of asphalt concrete pavement in China is mainly caused by pavement cracks,and the polymer surface repairing material has a good function of repairing cracks.Based on this,asphalt surface repair material composed of polyurethane,epoxy acrylic polyester,2,4-dimethylaniline,1,4-butanediol and benzoyl peroxide was prepared.Laboratory tests were carried out to analyze the influence of polyurethane mixture ratio on compressive strength,aging resistance,water stability and low temperature performance of asphalt surface repair material,and the optimal polyurethane mixture ratio was given.The results show that:(1)The compressive strength of asphalt surface repair material decreases with the increase of polyurethane content.(2)The tensile strength of asphalt surface repair material decreases with the increase of aging time.(3)From the perspective of water stability and low temperature characteristics of asphalt surface repair materials,the optimal polyurethane content is 24％.
维普
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