Novachi(R)超薄磨耗层沥青混合料使用性能评价

摘要

通过实验室试验,进行了密级配AC-13C、半开级配Novachip(R) Type C、开级配OGFC-13三种沥青混合料配合比设计,比较了3种沥青混合料的高温稳定性、水稳定性、低温抗裂性能等重要使用性能.试验结果及分析显示,沥青混合料的结构类型对动稳定度有很大影响,在高温稳定性方面,半开级配Novachip(R) Type C型超薄磨耗层要优于密级配AC-13C及开级配OGFC-13沥青混合料；混合料的级配及由此产生的空隙率差别对水稳定性及低温抗裂性能影响很大,随着空隙率的增加,水稳定性和低温抗裂性能降低.半开级配Novachip(R) Type C超薄磨耗层水稳定性、低温性能低于密级配AC-13C沥青混合料,但较开级配OGFC-13沥青混合料要好.%The dense gradation AC-13C, semi-open gradation Novachip甌ype C and open grada- . Tion OGFC-13 asphalt mixtures design are completed by laboratory tests. The paper compares the performance of three mixtures which are the high temperature stability, low temperature cracking resistance and moisture stability. The results and analysis show the structure type of asphalt mixture has a significant effects in dynamic stability. The semi-open gradation Novachip(R)Type C is better than dense gradation AC-13C and open gradation OGFC-13 in the high temperature performance. The gradation and incidental porosity of mixture difference affects the moisture stability and low temperature cracking resistance of asphalt mixture. With the increase of porosity, the moisture stability and low temperature cracking resistance of asphalt mixture decrease. The semi-open gradation Novachip(R)Type C is worse than AC-13C but better than OGFC-13 in moisture stability and low temperature cracking resistance.