摘要
针对我国重载交通沥青路面情况和工程需要,提出了一种骨架嵌挤型粗粒式高模量沥青混凝土(HMAC25)配合比设计方法。选择针入度为30(0.1 mm)左右的AH-30低标号硬质沥青作为高模量沥青混凝土的胶结材料,选择粗集料最大公称粒径不小于26.5 mm的石料,采用了基于最紧密状态的沥青混合料设计方法确定混合料的油石比。通过室内试验验证表明:使用本方法设计的骨架嵌挤型粗粒式高模量沥青混凝土HMAC25的高温稳定性与相关规范要求值相比提高了7倍之多,20℃抗压回弹模量与相关规范推荐的最大值提高了近30%,低温抗裂性能和水稳定性也能够满足规范的要求。
In view of heavy traffic situation of asphalt pavement and the project needs in China, a kind of mix design method of coarse graded high modulus asphalt concrete （ HMAC25 ） with skeleton embedded structure was proposed. A kind of low labeled hard asphalt with penetration degree of 30 （0. 1 ram） （ AH - 30 ） was used as the cementing material of high modulus asphalt concrete, and the nominal maximum aggregate size is no smaller than 26.5 ram. The asphalt-aggregate ratio of the asphalt mixture was determined by using the design method of asphalt mixture based on aggregate closest compact condition. The result of laboratory test indicates that （1） compared with the required value in the related specification, the high temperature stability of high modulus asphalt concrete made with the proposed method improved by more than 7 times; （2） compared with the maximum value recommended in the related specification, the compression resilient modulus at 20 ~C increased by nearly 30% ; （3） the low temperature anti-cracking performance and moisture stability can also meet the requirements of the specification.
出处
《公路交通科技》
CAS
CSCD
北大核心
2012年第10期28-32,共5页
Journal of Highway and Transportation Research and Development
关键词
道路工程
高模量沥青混凝土
油石比
SMA
紧密状态
road engineering
high modulus asphalt concrete
asphalt-aggregate ratio
SMA
closestcompact condition
