不同击实方式和击实次数对马歇尔指标的影响

Impact of various compaction methods and compaction times upon Marshall index

基于我国沥青混合料配合比设计采用的马歇尔试验方法,探究了成型方式和击实次数对体积指标影响,分析了其对体积指标影响的相关性,指出AC结构混合料,在表面碎石击实破碎不较重的情况下,改变击实功的单面成型也难以达到标准成型的体积指标,双面成型的试件,增加大于标准的击数,指标无明显变化,反之,随次数减少,变化显著。

Based on Marshall testing method adopted in domestic asphalt mixture mixing proportion design,the article studies the impact of forming methods and compaction times upon volume index,analyzes the relativity for volume index,and finally points out that： AC structure asphalt mixture,under light surface gravel compaction conditions,its single forming is hard to achieve forming volume index,increasing standard times,double-surface forming model index has no obvious change,otherwise,with the times reducing,the alteration increasing.