摘要
为研究沥青混凝土水稳定性的影响因素,选取了孔隙率、填料类型、沥青用量3个影响因素,进行了浸水马歇尔稳定度试验和水稳定性试验。结果表明,随着试件孔隙率的增大,马歇尔残留稳定度逐渐降低,当试件孔隙率大于规范3.0%的要求时,残留稳定度损失较快。以水泥为填料制备的沥青混凝土,水稳定系数随着浸水时间的增长,水稳定系数不断增大,且均大于1.0。以石粉为填料制备的沥青混凝土,水稳定系数随浸水时间的增长不断减小,当浸水时间为240h时,水稳定系数为0.86,不满足规范要求。不同沥青用量条件下的沥青混凝土,水稳定系数变化不大,表明沥青用量对沥青混凝土水稳定性的影响较小。
In order to study the influencing factors on water stability of core wall asphalt concrete,the porosity,filler type and asphalt dosage were chosen for Marshall stability test and water stability test.The results indicated that Marshall residual stability decreased with the increase of the porosity,and when the porosity was 3.0%,Marshall residual stability decreased rapidly.The water stability value of asphalt concrete mix by cement filler was increased with growth of immersion time,and all the values were overtop 1.0.The water stability value of asphalt concrete by limestone filler decreased with immersion time,and when the immersion time was 240 h,the water stability value was 0.86,which told us that it did not meet the requirements of specification.The water stability values of asphalt concrete showed no change sign with different asphalt dosages.This demonstrates that there is no significance effect on water stability values of asphalt concrete with different asphalt dosages.
出处
《新疆农业大学学报》
CAS
北大核心
2016年第6期495-499,共5页
Journal of Xinjiang Agricultural University
基金
新疆水利水电工程重点学科基金项目(xjzdxk-2010-02-12)
关键词
沥青混凝土
水稳定性
孔隙率
沥青用量
asphalt concrete
water stability
porosity
asphalt dosage
