骨架密实型稳定碎石基层收缩性能变化规律

Viable Contraction Regulatory on Stablized Macadam in Dense Skeleton Type

通过对不同曝光时间下的3种不同级配水泥稳定碎石在干缩性能试验以及不同温度条件下的温缩性能试验,分析了3种级配水泥稳定碎石收缩性能在不同影响因素下的变化规律。试验结果表明:在失水率方面中值级配干缩性能影响较小,优于其它两组级配;3种级配水泥稳定碎石温缩性能随着温度的变化有一定的变化规律;当龄期增长到一定程度时,中值级配温缩性能最优。

Through shrinkage performance test with three different gradation levels of cement stabi- lized crushed stone concrete under the different exposure time and different temperature conditions, we analyzed the variable rules of the three cement stabilized crushed stone concrete shrink performance under the different factors. The results showed that ： in terms of the rate of water loss medial gradation group has smaller effect on dry shrinkage, than the other two groups; temperature contraction performance of ce- ment stabilized macadam of three kinds of gradation gradation has certain regularity with the change of temperature; when the age grows to a certain extent, the median grade has the most optimized tempera- ture shrinkage performance.