低剂量水泥、石粉煤灰稳定碎石的路用性能研究.pdf

Road Performance of Low-Dose Cement and Lime fly ash Stabilized Aggregate A Dissertation Submitted for the Degree of Master Candidate：Huang Hai Supervisor：Prof. Wang Zhenjun Chang’an University, Xi’an, China 摘 要 半刚性基层材料虽在我国已使用多年，但其固有的早期损坏问题仍未得到彻底解 决。路面病害的产生严重影响了路面美观、行车安全以及行车舒适，因此开展减少半刚 性基层开裂、冲刷、抗冻性能的研究很有必要。为解决半刚性基层的病害问题，其他路 面结构类型如全柔性基层沥青路面、级配碎石柔性基层沥青路面、半刚性加柔性复合基 层沥青路面等结构类型的研究与应用也得到了一定的发展，但总的来说半刚性基层沥青 路面仍然是目前最主要的沥青路面结构形式。 本文进行了几个配合比的试验评价并对比了低剂量水泥粉煤灰稳定碎石和低剂量 石灰的石灰粉煤灰稳定碎石的路用性能。本文采用不同的水泥：粉煤灰和石灰：粉煤灰 比例，对低剂量粘结料粉煤灰稳定碎石的组成设计以及路用性能进行分析。 通过低剂量水泥、石灰粉煤灰稳定碎石的力学性能试验，对比分析了低剂量水泥、 石灰粉煤灰稳定碎石材料的无侧限抗压强度、劈裂强度、抗压回弹模量等指标，并参考 规范要求提出了其适用范围；通过低剂量水泥、石灰粉煤灰稳定碎石的抗冻系数及水稳 系数试验，考察了其抗冻性能和水稳定性；并分别采用机械法和电测法对低剂量水泥、 石灰粉煤灰稳定碎石的干燥收缩性能和温度收缩性能进行了试验和评价。为低剂量水 泥、石灰粉煤灰稳定碎石的半刚性基层的应用提供指导。 关键词：低剂量；粉煤灰；稳定碎石；路用性能 i ABSTRACT Semi-rigid base material has been used for many years in our country, but its inherent early damage problems have not been completely resolved. Pavement diseases have serious impact on the pavement beauty, traffic safety and traffic comfort, so research in reducing the semi-rigid crack, scour, anti-freezing performance is necessary. To solve the disease problem of semi-rigid base, many pavement structure types such as full soft asphalt pavement, graded gravel soft asphalt pavement, half rigid and soft composite base asphalt pavement structure have been used, but the asphalt pavement with semi-rigid base is still the main form of asphalt pavement structure. In this paper several determination of the test evaluation and compared with low dosage of fly ash cement stabilized macadam and low dose lime fly ash stabilized stone road performance. This paper adopts different cement, fly ash and lime: fly