| PPA对改性沥青及其混合料低温性能影响 |
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| 引用本文： | 莫定成,黄卫东,吕泉,张家伟,关维阳.PPA对改性沥青及其混合料低温性能影响[J].石油沥青,2021(1):6-11. |
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| 作者姓名： | 莫定成 黄卫东 吕泉 张家伟 关维阳 |
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| 作者单位： | 同济大学道路与交通工程教育部重点实验室;中国建筑第八工程局有限公司 |
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| 基金项目： | 胶粉改性沥青与集料界面粘附的失效机制与提升方法研究,中国博士后科学基金面上一等资助(第66批);胶粉改性沥青粘附性的机理解析与性能评价研究,国家自然科学基金青年基金项目(51908426);高掺量SBS改性沥青的老化机理、模拟与性能评价,国家自然科学基金面上项目(51978518);沥青与集料界面粘附性自愈合的机理、评价与增强,国家自然科学基金面上项目(51778481)。 |
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| 摘 要： | 分别通过弯曲梁流变试验(BBR)和半圆弯拉试验(SCB)分析多聚磷酸(PPA)对改性沥青/沥青混合料低温性能的影响.结果表明:PPA的加入改善了基质沥青及其混合料的低温性能,掺量宜为0.8％-1.6％;0.4％掺量PPA对TB复合SBS改性沥青及其混合料的低温有较好的改善效果;PPA对于沥青低温性能的提升能力随着温度降...
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| 关 键 词： | 道路工程 低温性能 半圆弯拉试验 多聚磷酸 复合改性 |
Effect of PPAon the Low-temperature Performance of Modified Asphalt and Its Mixture |
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| MO Dingcheng,HUANG Weidong,LYN Quan,ZHANG Jiawei,GUAN Weiyang.Effect of PPAon the Low-temperature Performance of Modified Asphalt and Its Mixture[J].Petroleum Asphalt,2021(1):6-11. |
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| Authors: | MO Dingcheng HUANG Weidong LYN Quan ZHANG Jiawei GUAN Weiyang |
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| Affiliation: | (Road and Traffic Engineering Key Laboratory of Ministry of Education,Tongji University,Shanghai 201804;China Construction Eighth Engineering Division Co.,Ltd.,Shanghai 200135) |
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| Abstract: | The effect of polyphosphoric acid(PPA)on the low-temperature performance of modified asphalt/asphalt mixture is analyzed by bending beam rheological test and semi-circular bending test.The results show that the addition of PPA improve the low temperature performance of matrix asphalt and its mixture,and the appropriate dosage PPA is 0.8~1.6%.0.4% PPA can well improve the low temperature of TB composite SBS modified asphalt and its mixture.The ability of PPA in improving the low temperature performance of asphalt is more significant as the temperature decreases,and the low temperature performance of different types of PPA modified asphalt is mainly controlled by the creep rate.The low temperature continuous grading temperature T is highly correlated with Gf and JC values of SCB test,which can mutually confirm the low temperature performance of asphalt and mixture. |
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| Keywords: | road engineering low temperature performance semi-circular bending test polyphosphoric acid composite modification |
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