集料特性对SMA沥青混合料中VMA指标的影响研究

Research on Influence of Aggregate Characteristics on VMA of SMA Asphalt Mixture

针对集料特性对SMA沥青混合料中VMA值的影响问题,在理论分析其影响规律的基础上,通过马歇尔试验,研究了VMA值随集料针片状含量、粗糙度、棱角性、磨耗值、集料密度和吸水率等变化的增减规律,再综合考虑石料的吸水率作用,以确定用于SMA沥青路面的集料的合适相对密度、吸水率等特性值。

Aimed at the influence of aggregate characteristics on VMA value of SMA asphalt mixture, the Marshall Test was carried out to study the changing rule of VMA value following the changes of amount of flaky particles, roughness, angularity, wear value, aggregate density and water absorption based on the theoretical analysis of the influential rule. The water absorption of gravel was also considered, in order to determine applicable relative density, water absorption for SMA asphalt mixture.