不同沥青结合料的浇注式沥青混合料性能对比分析
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摘要
针对我国钢桥面浇注式沥青混合料用聚合物复合改性沥青、湖沥青复合改性沥青及硬质沥青改性沥青所存在的性能差异,对3种沥青结合料的基本性能以及其混合料的流动性、高温稳定性及疲劳耐久性等进行试验对比研究,全面分析其性能差异。实验结果表明:浇注式沥青混合料的性能与其结合料类型存在一致性。采用聚合物复合改性沥青成型的混合料综合性能具有明显优势:当温度达到70℃,该混合料静态贯入度较其它两种混合料低9.0%和28.4%;低温弯拉极限应变较湖沥青复合改性沥青、硬质沥青改性沥青混合料依次高出22.8%、60.2%;在600με控制条件下的四点弯曲疲劳次数,聚合物复合改性沥青超过100万次,湖沥青复合改性沥青约32.5万次,硬质沥青改性沥青在加载初期即出现破坏。
Aiming at the performance differences of polymer composite modified asphalt,lake asphalt compound modified asphalt,and hard modified asphalt for steel bridge deck gussasphalt in China,the basic properties of the three asphalt binders and their fluidity,high temperature stability and fatigue durability were tested and compared,and their performance differences were comprehensively analyzed. The experimental results show that the performance of the gussasphalt is consistent with its binder type. The comprehensive performance of the mixture formed by polymer composite modified asphalt has obvious advantages. The static penetration of the mixture formed by polymer composite modified asphalt is 9. 0% and28.4% lower than that of the other two mixtures when the temperature reaches 70 ℃. Its ultimate strain at low temperature is22.8% and 60.2% higher than that of lake asphalt composite modified asphalt and hard asphalt modified asphalt mixture respectively. Under 600 με control,the four-point bending fatigue times of polymer composite modified asphalt are more than 1 million times,those of lake asphalt composite modified asphalt are about 325 000 times. Hard asphalt modified asphalt is damaged at the beginning of loading.
Aiming at the performance differences of polymer composite modified asphalt,lake asphalt compound modified asphalt,and hard modified asphalt for steel bridge deck gussasphalt in China,the basic properties of the three asphalt binders and their fluidity,high temperature stability and fatigue durability were tested and compared,and their performance differences were comprehensively analyzed. The experimental results show that the performance of the gussasphalt is consistent with its binder type. The comprehensive performance of the mixture formed by polymer composite modified asphalt has obvious advantages. The static penetration of the mixture formed by polymer composite modified asphalt is 9. 0% and28.4% lower than that of the other two mixtures when the temperature reaches 70 ℃. Its ultimate strain at low temperature is22.8% and 60.2% higher than that of lake asphalt composite modified asphalt and hard asphalt modified asphalt mixture respectively. Under 600 με control,the four-point bending fatigue times of polymer composite modified asphalt are more than 1 million times,those of lake asphalt composite modified asphalt are about 325 000 times. Hard asphalt modified asphalt is damaged at the beginning of loading.
引文
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[3]章登精.浇注式硬质直馏沥青混凝土钢桥面铺装设计和施工技术研究[J].公路,2015(7):21-29.ZHANG Dengjing. Design and construction for steel deck pavement of hard straight gussasphalt concrete[J]. Highway,2015(7):21-29.
[4]冉雪,王旭龙,熊齐海,等.沥青用量对浇注式沥青混凝土路面性能影响的研究[J].中外公路,2016,36(5):54-58.RAN Xue,WANG Xulong,XIONG Qihai,et al.Study on the effect of asphalt dosage on the performance of cast asphalt pavement[J]. Journal of China&Foreign Highway,2016,36(5):54-58.
[5]薛昕,王民,高博,等.复合改性沥青浇筑式混凝土性能研究[J].重庆交通大学学报(自然科学版),2010,29(3):387-390.XUE Xin,WANG Min,GAO Bo,et al. Study on the performance of compound modified bitumen guss asphalt[J].Journal of Chongqing Jiaotong University(Natural Science),2010,29(3):387-390.
[6]盛兴跃,李璐,李睿.运输时间对浇注式沥青混合料性能的影响[J].公路工程,2015,40(2):97-99.SHENG Xingyue, LI Wu, LI Rui. Effect of transport time of gussasphalt mixture performance[J]. Highway Engineering,2015,40(2):97-99.
[7]陈剑华,张肖宁,邹桂莲,等.超热老化对浇注式沥青混合料高温性能影响研究[J].科学技术与工程,2014,14(25):131-134.CHEN Jianhua, ZHANG Xiaoning, ZOU Guilian, et al. Hightemperature performance of mastic asphalt on ultra-heat aging impact[J].Science Technology and Engineering,2014,14(25):131-134.
[8]杨吉昌,刘立春,杨立森,等.浇注式沥青混凝土路用性能研究[J].北方交通,2006(10):3-6.YANG Jichang,LIU Lichun,YANG Lisen,et al. Research on road usage performance of guss asphalt concrete[J]. Northern Communications,2006(10):3-6.
[9]宋宽彬,沈菊男.水发泡沥青温拌性能试验研究[J].公路,2016(7):244-250.SONG Kuanbin,SHEN Ju'nan. Performance of water-foaming warm mix asphalt[J]. Highway,2016(7):244-250.
[10]郝增恒,吴文军,盛兴跃,等.基于不同超热温度的浇注式沥青混合料高温性能[J].公路交通科技,2013,30(1):17-21.HAO Zengheng, WU Wenjun, SHENG Xingyue, et al. High temperature performance of gussasphalt based on different epithermal temperatures[J]. Journal of Highway and Transportation Research and Development,2013,30(1):17-21.