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继《沥青针入度测定法》(GB/T4509-1998)颁布后,我国又颁布了《沥青软化点测定法(环球法)》(GB/T4507-1999)和《沥青延度测定法》(GB/T4508-1999),以代替原1984年颁布的标准。现将新标准的修订内容介绍如下。一、沥青软化点测定法的修改内容
Following the promulgation of “Determination of Asphalt Penetration” (GB / T4509-1998), China also promulgated the “Determination of Asphalt Softening Point (Global Law)” (GB / T4507-1999) and the Determination of Asphalt Ductility ( GB / T4508-1999), to replace the original standard promulgated in 1984. Now the revised standards of the new standards are as follows. First, the modified content of asphalt softening point determination method