粉煤灰对水泥稳定类基层材料性能改善的机理探讨

Discussion About Mechanism of Fly-Ash on Improving Performance of Cement Stabilized Road Base Material

针对粉煤灰对水泥稳定类基层材料性能改善机理不够完善、不够系统以至水泥粉煤灰稳定类基层材料无法很好地进行推广应用的问题,从材料的组成、结构决定材料的性能的原理入手,通过分析探讨粉煤灰对水泥稳定类基层材料的微观与宏观结构组成、化学与材料组成以及力学参数等方面的改性,提出粉煤灰通过填充作用、活性作用、接触形式改善作用、微集料作用以及改善力学参数作用对水泥稳定类基层材料的性能进行改善,为水泥粉煤灰稳定类基层材料的设计与应用提供了相应的理论支持。

To counter the problems, which cement fly-ash stabilized road base material can＇t be used well because the mechanism on improving cement stabilized material hasn＇t been researched completely and systemically enough, the paper analyzes the influence of fly-ash on macro- and micro- structure of cement stabilized road base material, on chemic and substantial composition and on mechanical parameter based the principle that structure and composition of material determines its performance, and brings forward that fly-ash improves the performance of cement stabilized material through the action of filling, activity, changing of contacting form, mini-aggregate and changing of mechanical parameter, which can provide theoretic support on design and application of cement-fly ash stabilized road base material.