辉绿岩取代石灰岩的可行性研究

Study on the Feasibility of Replacing Limestone with Diabase

本着"因地制宜,就地取材"原则,结合桥梁钢桥面铺装工程,探讨辉绿岩作为细集料取代石灰岩的可行性。目前,辉绿岩作为SMA粗集料取代玄武岩已在国内工程中多次应用,实践证明是可行的。本文以辉绿岩为粗集料,对比辉绿岩和石灰岩作为细集料的SMA混合料体积特性、马歇尔稳定度及抗车辙性能等方面,结果表明辉绿岩作为SMA细集料明显降低混合料抗车辙性能,不宜取代石灰岩。

At present,diabase as SMA coarse aggregate instead of basalt has been used in many domestic projects,which has been proved feasible in practice.The diabase is used as coarse aggregate in this paper,and the volume characteristics,Marshall Stability and rutting resistance of SMA mixture with diabase and limestone as fine aggregate are compared.The results show that diabase can significantly reduce the rutting resistance of mixture as SMA fine aggregate,and is not suitable to replace limestone.