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低标号硬质沥青具有针入度小、软化点高、粘度大的特点,其混合料高温稳定性及水稳定性优越、低温抗裂性略差。本文采用高模量沥青混合料配合比设计方法对HMAC-20C及HMAC-20F两种级配20号硬质沥青混合料的高温稳定性、低温抗裂性、水稳定性及动态模量进行了试验研究,结果表明20号沥青混合料各项路用性能均满足规范要求,且动态模量满足高模量沥青混合料的技术指标要求。
Low-grade hard bitumen has the characteristics of small penetration, high softening point and high viscosity. The mixture has high temperature stability and water stability, and the low temperature cracking resistance is slightly worse. In this paper, the high temperature stability, low temperature crack resistance, water stability and dynamic modulus of 20 grades of hard grade asphalt mixture HMAC-20C and HMAC-20F Experimental results show that the road performance of No. 20 asphalt mixture meets the requirements of the specification and the dynamic modulus meets the technical requirements of the high modulus asphalt mixture.