【摘要】 为研究老化对泡沫温拌沥青混合料性能的影响,采用体积指标法确定泡沫温拌Sup-20混合料的适宜成型温度,分别对不同老化时间下的泡沫温拌沥青混合料的体积指标以及原样混合料、短期老化后和长期老化后的热拌沥青混合料和泡沫温拌沥青混合料的高温性能、低温性能和水稳定性能进行研究。结果表明:泡沫温拌Sup-20混合料适宜的压实温度为110℃左右,拌和温度为125℃左右。泡沫温拌Sup-20混合料的高温抗车辙性能、低温抗裂性能和水稳定性能均稍弱于相应的热拌沥青混合料,并且泡沫温拌Sup-20混合料的路用性能衰减程度大于热拌混合料,其抗老化性能弱于热拌混合料。更多还原

【Abstract】 In order to study the effect of aging on properties of foamed warm-mixed asphalt mixture,volume index method was used to determine the optimum forming temperature of the foamed asphalt mixture.Road performance of original hot-mixed asphalt mixture and the foamed warm-mixed asphalt mixture under different conditions(original,short term aging,long term aging)was investigated through laboratory tests.Test results show that the optimal compaction temperature of Sup-20 foamed asphalt mixture is about 110℃,and the mixing temperature is about 125℃.High temperature performance,low temperature crack resistance and water stability of Sup-20 foamed asphalt mixture are weaker than that of hot-mixed asphalt mixture,the attenuation of road performance of Sup-20 foamed asphalt mixture is higher than that of hot-mixed asphalt mixture,and its aging resistance is lower than that of hot-mixed asphalt mixture.更多还原