二灰稳定碎石半刚性基层性能的试验研究

由于结构设计不当,半刚性基层的优越性往往不能充分发挥,从而导致路面的早期破坏;同时由于其早期强度低,使得施工养护难度增大。文章对二灰稳定碎石半刚性基层两种结构进行材料选择和配合比的优化设计,试验表明在二灰稳定碎石半刚性基层材料中加入适量的水泥能提高混合料的早期强度和总体强度,而且能减少混合料的干缩、温缩裂缝。

Experimental research on the performance of lime-flyash stabilized macadam semi-rigid base course

The improper design of the structure of the semi-rigid base course usually result in early damage to the pavement so that the advantage of such base course can not be brought into full play,and the difficulty in the construction and maintenance increases due to its low intension at the early stage. In this paper, the two structures of the lime-flyash stabilized macadam semi-rigid base course are investigated in regard to the choice of materials and the mixture ratio,and an optimized design is obtained. The test results indicate that if an appropriate amount of cement is added to the base course materials,the early and whole intension of the mixture will be improved, and the cracks due to drying shrinkage and thermal contraction decrease.