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机构地区:[1]郑州大学新型建材与结构研究中心,河南郑州450002 [2]开封大学土木建筑工程学院,河南开封475004
出 处:《郑州大学学报(工学版)》2010年第4期1-5,共5页Journal of Zhengzhou University(Engineering Science)
基 金:国家自然科学基金资助项目(50678159)
摘 要:通过变化三种级配、两种纤维及每一纤维用量下至少变化三种油石比进行试验,研究级配组成、油石比及纤维沥青胶浆对SMA混合料体积参数的影响.结果表明,混合料的矿料级配对SMA混合料的体积参数影响显著.随4.75 mm筛孔通过率的增加,矿料间隙率VMA和空隙率VV均显著降低,而粗集料骨架间隙率VCAmix和沥青饱和度VFA则明显变大;随油石比的增加,由于沥青的填充作用,导致空隙率VV逐渐降低,沥青饱和度VFA增加.在级配一定情况下,纤维的"微集料"及填充作用,使SMA混合料的空隙率VV随纤维沥青胶浆含量的增大而减小,矿料间隙率VMA、沥青饱和度VFA及粗集料骨架间隙率VCAmix逐渐增大.Through the tests of changing three kinds of aggregate grading and two kinds of fiber and more than three kinds of asphalt contents at every sort and quantity of fiber,the effect of aggregate grading,content of asphalt and the paste composed of fiber and asphalt on volume parameters of Stone Matrix Asphalt are analyzed.The results indicate that the aggregate grading has a remarkable influence on volume parameters of SMA.With the increase of the passing percent of 4.75mm sieve pore,the voids in mineral aggregate(VMA) and percentage of void(VV) decrease obviously,while the voids in coarse aggregate(VCAmix) and voids filled by asphalt(VFA) increase greatly.Due to the filling function of asphalt,with the increase of asphalt content,percentage of void(VV) decreases gradually and voids filled by asphalt(VFA) increases on the other hand.As a result of tiny aggregate effect of fiber,with the increase of the paste composed of fiber and asphalt,the percentage of void(VV) declines evidently,however,voids in mineral aggregate(VMA) and voids in coarse aggregate(VCAmix) and voids filled by asphalt(VFA) increase.
分 类 号:U414[交通运输工程—道路与铁道工程]
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