高速公路路面基层水泥稳定土配比及性能试验方法

Test Method for Ratio and Performance of Cement Stabilized Soil of Highway Pavement Base

基于重型击实试验,从最优含水率、最大干密度两个方面确定在不同配合比时水泥稳定土的性能表现;基于无侧限抗压强度试验,确定水泥和添加剂的合适掺量。结果表明:无论最优含水率还是最大干密度,受添加剂掺量的影响均较小;随着水泥掺量的增加,实测7 d无侧限抗压强度有增加的变化趋势,路面结构更具稳定性,不易出现强度薄弱区。根据研究结果,建议在高速公路的建设中,参照12.00%的剂量要求选用水泥材料,并取水泥质量的2.00%作为添加剂掺量,这种材料用量比例能够充分发挥出材料的性能优势。

Based on heavy compaction test, the performance of cement-stabilized soil was determined from two aspects of optimal water content and maximum dry density at different mixing ratios. Based on unconfined compressive strength test, the appropriate dosage of cement and additives was determined. The results show that both the optimal water content and the maximum dry density are less affected by the additive content. With the increase of cement content, the measured 7 d unconfined compressive strength has an increasing trend, and the pavement structure is more stable, and the weakness zone is not easy to appear. According to the research results, it is suggested that in the construction of expressways, cement material should be selected according to the dosage requirement of 12.00%, and 2.00% of cement quality should be taken as additive content, which can give full play to the performance advantages of materials under the proportion of material dosage.