石灰粉煤灰类基层延迟碾压可行性分析

Anlysis of Feasibility of Delayed-compaction for Lime Fly-ash Mixture Base Course

室内外试验证实石灰粉煤灰类基层材料具有显著的施工碾压可延迟特性 ,延迟后的二灰材料在强度、密度和含水量等方面都会产生一定的变化。理论分析认为这种特性的形成在于粉煤灰的结构相对稳定与石灰反应的程度初期缓慢所致。

Experiments in lab and site prove that the lime fly-ash mixture used as a base course material has an obvious construction characteristic of delayed-compaction,which causes some changes of the mixture in strength,density and moisture content after delayed compaction.Theoretical analyses consider that this property of the mixture is caused by the relatively higher stability of the fly-ash structure and the slower reaction of fly-ash with the lime at initial stage.