摘要
Abstract
In order to promote the application of hot in-place recycling technology in expressway asphalt pavement maintenance,a study was conducted based on the expressway maintenance projects in Jiangxi province,in terms of the quality control points of asphalt mixture ratio design and construction temperature.Firstly,based on the Marshall design theory and the technical properties of raw materials,the mixture ratio was designed,among which the gradation of asphalt mixture and the number of new asphalt binders,regenerators,and new aggregates were determined.Subsequently,based on rutting,immersion Marshall,freeze-thaw splitting and low-temperature bending tests,the high-temperature rutting resistance,water damage resistance,and low-temperature crack resistance of the asphalt mixtures at the designed material composition were verified.Finally,based on engineering applications and pavement construction quality inspection,the key points of temperature control during construction were demonstrated.The research results show that a reasonable material composition design and construction temperature control are strong assurances for the quality of hot in-place recycling projects.关键词
高速公路养护/就地热再生/配合比设计/路用性能Key words
expressway maintenance/hot in-place recycling/asphalt mixture design/performance分类
交通运输
