Study on Normative Standards of Hard Asphalt for highway engineering in China

Abstract

Hard asphalt has been applied and studied on Chinese highway asphalt pavement for nearly 20 years. Although it has excellent road performance, it has not been applied on a large scale. The main reason is that there is no clear technical standard and technical system for hard asphalt, which restricts the popularization and application of hard asphalt as a good material in the highway engineering. Therefore, it is urgent to formulate standards for hard asphalt products of highway engineering in China. In order to promote the large-scale application of hard asphalt for asphalt pavement in China, a draft definition of hard asphalt for highway use and a draft technical standard for engineering are proposed through a large number of tests and research analysis of various samples, drawing lessons from the current technical specifications and relevant international standards for hard asphalt.