高粘改性沥青胶浆粘弹特性研究

发布时间：2018-10-23 09:45

【摘要】：为分析矿粉在高粘改性沥青中的作用机理,对不同粉胶比下的高粘改性沥青胶浆进行布氏粘度试验和重复蠕变试验。从粘弹性角度分析了粉胶比和试验温度对胶浆粘度和粘温指数|VTS|的影响,以及粉胶比对胶浆蠕变劲度的粘性部分GV、累积变形量和变形恢复能力γL/γP等粘弹性指标的影响。结果表明:随着粉胶比的增大,粘度和GV值急剧增大,累计变形量和γL/γP逐渐减小,而|VTS|随粉胶比的增大先减小后增大;当粉胶比小于1.2时,增大粉胶比能显著改善沥青胶浆的感温性及高温抗变形能力,当粉胶比大于1.4时继续增加矿粉的用量会显著影响沥青胶浆的变形恢复能力。综合考虑,粉胶比的合适范围在1.0~1.4之间。
[Abstract]:In order to analyze the action mechanism of mineral powder in high viscosity modified asphalt, Brinell viscosity test and repeated creep test of high viscosity modified asphalt mortar with different powder / binder ratio were carried out. The effects of powder / binder ratio and test temperature on viscosity and viscosity index (VTS) of slurry were analyzed from the viscoelastic point of view. The effects of powder / binder ratio on viscosity partial GV, cumulative deformation and deformation recovery capacity (纬 L / 纬 P) of mortar creep stiffness were also analyzed. The results showed that the viscosity and GV value increased sharply with the increase of powder / binder ratio, and the cumulative deformation and 纬 L / 纬 P decreased gradually, while VTS decreased first and then increased with the increase of powder / gel ratio, and when the powder / gel ratio was less than 1. 2, Increasing the powder / binder ratio can significantly improve the temperature sensitivity and high temperature deformation resistance of asphalt mortar. When the powder / binder ratio is greater than 1.4, increasing the amount of mineral powder will significantly affect the deformation recovery ability of asphalt mortar. Considering comprehensively, the suitable range of powder / binder ratio is between 1.0 and 1.4.
【作者单位】：长安大学交通铺面材料教育部工程研究中心;长安大学材料科学与工程学院;长安大学公路学院;
【基金】：“十二五”国家科技支撑计划(2011BAE27B04)
【分类号】：U414

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