纤维微表处性能及影响因素探究

Experimental Study on Fiber Micro-surfacing Performance and Its Influence Factors

从集料级配间断与否、胶乳类型、纤维的长度这三个因素出发,对纤维微表处的性能进行研究。对于混合料的低温性能,则采用自行设计的小梁弯曲试验,以位移-力曲线下的能量积分作为衡量指标进行评价,其值越大混合料的低温抗弯拉性能越好。结果表明:在间断级配中加入纤维可以改善混合料的路用性能;胶乳B与混合料配伍性更好;纤维长度对混合料抗车辙能力影响不大,而对混合料低温抗弯拉性能影响较大,且长度的增加有利于混合料低温性能的提高。

The performance of fiber micro-surfacing mixture has been studied from the three aspects of aggregate gradation with or without interruption, latex type and the length of the fiber. For resistance of mixture to low tem-perature, the energy integral under the curve of force and displacement is used as evaluation indicators, which is obtained by self-designed trabecular bending test. It finds out that the greater the value is, the better the perfor-mance of mixture is. Results show that：the addition of fiber in the gap-graded mixture can improve road perfor-mance; latex B has better compatibility with mixtures; the length of fiber has a little influence on rutting resis-tance, but has a greater influence on the bending tensile performance of mixture;and the increase of the length is beneficial to the improvement of the low temperature performance of mixture.