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一、国内外概况近30年来,美国、日本、俄罗斯、加拿大、瑞典、韩国、芬兰等国已成功地应用胶粉改性沥青修筑高速公路或高等级公路。然而我国应用胶粉改性沥青修建公路仍处于试验阶段。近年来,我国用于修公路的沥青每年高达500万~800万吨(不包括公路的
I. Overview at home and abroad Nearly 30 years, the United States, Japan, Russia, Canada, Sweden, South Korea, Finland and other countries have successfully applied rubber powder modified asphalt to build expressways or highways. However, the application of rubber powder modified asphalt road construction is still in the experimental phase. In recent years, the bitumen used in road repair in our country is as high as 5 million to 8 million tons per year (excluding road