黄石粉作为一种路基填料的试验及应用研究

Test & Application Research of Yellowstone Powder as Subgrade Filling

研究产于广东清远地区的黄石粉作为路基填料的可行性及其路用性能。通过室内试验,确定黄石粉的工程分类和物理力学参数;通过铺筑路基试验段,获取一系列施工参数,并总结路基填筑的质量控制措施。研究结果表明:黄石粉为砂类土,可通过调整细粒组的含量优化黄石粉的级配;级配良好的黄石粉适合作为路基填料,同等施工条件下其压实度、CBR强度等指标优于普通路基填料;黄石粉路基兼具填砂和填土路基的优点,推广使用。

The feasibility & pavement performance of the yellowstone powder produced in Qingyuan area of Guangdong as roadbed filler are studied in this paper. Through laboratory tests, the engineering classification & physical mechanical parameters of the yellowstone powder are determined, and a series of construction parameters are obtained by paving the test section of the roadbed, and the quality control measures of roadbed filling are summarized. The results show that the yellowstone powder is sandy soil, and its gradation can be optimized by adjusting the content of fine-grained groups;the yellowstone powder with good gradation is suitable for roadbed filling, and its compactness & CBR strength are better than ordinary roadbed filling under the same construction conditions;the yellow stone powder roadbed has the advantages of both sand filling & soil filling roadbed.