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采用抗折试验、摆锤式冲击试验以及动态抗开裂性试验研究了胶粉、聚丙烯纤维对微表处稀浆混合料抗裂性能的影响。结果表明:随着胶粉掺量的增大,混合料的抗折强度和抗冲击强度先增大后减小;随着纤维掺量的增大,混合料的抗折强度和抗冲击强度逐渐增大;动态开裂试验显示混合料的裂缝最大宽度和裂缝数量均随胶粉和纤维掺量的增加而降低;胶粉和纤维混掺比单一掺加胶粉或纤维对混合料抗裂性能的改善效果更显著。
The effects of crumb rubber and polypropylene fiber on the crack resistance of the slurry mixture at the micro-surfacing site were studied by flexural test, pendulum impact test and dynamic cracking resistance test. The results show that the flexural strength and impact strength of the mixture first increase and then decrease with the increase of the content of the rubber powder. With the increase of fiber content, the flexural strength and impact strength of the mixture gradually The dynamic cracking test shows that the maximum width of cracks and the number of cracks in the mixture decrease with the increase of the content of the rubber powder and fiber; the mixing ratio of the rubber powder and the fiber is better than that of the single mixed powder or fiber Improve the effect of more significant.