辉绿岩替代型沥青磨耗层的试验研究

Experimental Investigation on Asphalt Wearing Course Substituted by Diabase

摘要: 近期由于浙江沿海限制生态功能保护区和自然保护区内的矿产资源开采，导致温岭地区集料供应紧缺，为了实现市政道路造价和性能双优，在设计阶段进行相关集料替代研究，经必选确定辉绿岩进行玄武岩的替代，本研究结合工程案例，选取了构造深度和摆值两个指标，以辉绿岩沥青磨耗层的抗滑和耐磨性能进行分析。首先以为了实现更好的抗磨耗性能，以及后期的抗滑效为原则，选取了磨耗层专用级配，对原材料进行了检测，同时对配合比设计进行了研究，确定了适用的矿料级配，确定了最佳沥青用量；混合料方面进行了辉绿岩和玄武岩所制备的沥青混合料的性能对比，并拟合其抗滑性能的衰减曲线；最后通过室内外试验分析施工现场沥青路面构造深度和摆值的检测结果，结果显示辉绿岩沥青磨耗层是满足路面抗滑要求的。

Abstract: Recently, due to the limited exploitation of mineral resources in the ecological function reserve and nature reserve along the coast of Zhejiang Province, the aggregate supply in Wenling area is in short supply. In order to achieve the double optimization of municipal road cost and performance, relevant aggregate substitution research is carried out at the design stage. After selection, diabase is selected to replace basalt. In this study, combined with engineering cases, structural depth and swing value are selected as two indicators. This paper focuses on the research on the skid resistance and wear resistance of the anti sliding pavement of diabase asphalt pavement. Firstly, in order to achieve better anti wear performance and later anti slip effect, a special grading for the wearing layer was selected, and raw materials were tested. At the same time, the mix design was studied to determine the suitable mineral aggregate grading and the optimal asphalt dosage; In the aspect of mixture, the performance of asphalt mixture prepared by diabase and basalt is compared, and the attenuation curve of its anti sliding performance is fitted; Finally, through indoor and outdoor tests to analyze the detection results of the construction site asphalt pavement structure depth and swing value, the results show that the diabase asphalt wearing course meets the requirements of pavement anti sliding.