水泥稳定碎石基层压实度影响因素分析

Analysis of Influence Factors of Cement Stabilized Crushed Stone Base Layer Compaction Degree

水泥稳定碎石基层以良好的水稳定性及足够的强度等特点,被广泛地应用于道路的新建与改扩建工程。水泥稳定碎石基层施工压实度控制因素较多,施工中如果不重视这些因素并采取有效措施,会导致工程范围内水泥稳定碎石基层施工压实质量存在差别,进而影响道路整体的使用寿命。本文从室内试验及施工角度详细研究了矿料级配、松铺系数、碾压工艺对水泥稳定碎石基层压实度的影响,并确定了最佳的施工工艺和参数。结果发现,骨架型矿料级配、较好的碾压工艺及适宜的松铺系数可以保证水泥稳定碎石基层具有一定的匀质性,且提升其压实度,压实后的基层厚度保持在18cm较为适宜,为控制水泥稳定碎石基层的施工质量提供了指导与帮助。

Cement-stabilized crushed stone base layer is widely used in road construction,reconstruction and expansion projects due to its excellent water stability and sufficient strength.There are many control factors for the compaction degree of cement-stabilized crushed stone base layer construction,if they are not considered seriously and appropriate measurements are not taken accordingly during the construction,differences will be caused in the compaction quality within the project scope and further affects the overall service life of the road.In this paper,the influence of three factors on the compaction degree of cement-stabilized crushed stone base layer was studied in detail from the perspectives of indoor and construction,ie mineral material gradation,loose paving coefficient and rolling technology,and the best construction technology and factors were determined.It was found that the skeleton type mineral grading,better rolling process and appropriate loose lay coefficient could ensure the cement-stabilized crushed stone base layer a certain homogeneity.And if improve its compaction degree,additionally,the suitable thickness of the compacted base was kept at 18cm.The results could provide a guidance for controlling the construction quality of the cement-stabilized crushed stone base layer.