Specifications exist that strictly define the composition and properties of the material which is usually made available in three grades, LPG propane, LPG butane and LPG mixture.
规范通常将LPG分为三个等级：LPG丙烷、LPG丁烷和LPG混合物，对它们的组成和性质有严格的定义。简称液化气。
Results of retained Marshall Stability (MS0) and Tensile Strength Ratio (TSR) indicate that without additive, the moisture damage resistance of basalt asphalt mixture may not meet the specifications.
马歇尔试验残留稳定度（MS0）与冻融劈裂试验残留强度比（TSR）结果显示，无添加剂玄武岩沥青混合料的水稳定性不一定能够满足规范要求；
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