泡沫沥青用量和矿料级配对混合料拌和用水量影响

为了研究泡沫沥青用量和矿料级配对泡沫沥青混合料所需合理拌和用水量的影响，设计了3种矿料级配组成OA1、OA2和OA3，通过变化4种沥青用量2％、3％、4％、5％（相对于矿料干重的百分比），5种拌和用水量，即混合料最佳击实含水率（OMC）的60％、70％、80％、90％、100％，将各组合下制备成的泡沫沥青混合料成型试件，测定其间接拉伸强度和干密度．结果表明：不同的矿料级配、泡沫沥青用量和拌和用水量条件下制备的泡沫沥青混合料具有不同的间接拉伸强度和干密度．不同的矿料级配和不同的混合料拌和用水量存在最佳泡沫沥青用量3％．综合推荐出泡沫沥青混合料OA1、OA2和OA3适宜的拌和用水量范围分别为65％～80％OMC、70％～85％OMC和75％～85％OMC．通过试验路的铺筑观测发现，使用状况良好，验证了此研究结果是合理的．

Influence of Foamed Asphalt Content and Aggregate Gradation on Mixing Moisture Content of Mixture

The reasonable water consumption of foamed asphalt mixture is influenced by the content of foamed asphalt and mineral aggregate gradation.This paper studied the indirect tensile strength and dry density of foamed asphalt mixture model using three types of mineral aggregate gradation,four different asphalt contents and five kinds of optimum compaction water content.The results show that the foamed asphalt mixture has different indirect tensile strengths and dry densities with various mineral aggregate gradations,foamed asphalt contents and water consumptions.The optimum content of foamed asphalt is determined by 3% according to different gradations and water consumptions of asphalt mixture.The tests indicate that appropriate water consumption ranges are 65%-80%OMC,70%-85%OMC and 70%-85%OMC for asphalt mixture OA1,OA2 and OA3,respectively.The conclusions are verified by a lot of test results.