旧料掺量对温拌再生沥青混合料耐久性的影响分析
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摘要
为了研究旧料掺量对温拌再生沥青混合料耐久性的影响,采用冻融劈裂与水损坏敏感试验(MIST)研究混合料抗水损害性能,采用半圆弯曲试验研究混合料抗裂性能,采用标准贯入试验(SPT)研究混合料动态模型变化趋势。结果表明:随着回收沥青路面材料(RAP)含量的增加,水处理后沥青混合料弹性模量比逐渐提高,水对弹性模量的衰减程度影响相对较低;混合料破坏时的耗散徐变应变能DCSEf先增加后减少,温拌再生沥青混合料中存在一个最佳的RAP含量;旧料的增加在一定程度上降低了沥青混合料的抗开裂能力,使混合料向脆化方向发展,当旧料掺量达到一定水平后,再生沥青混凝土的抗裂性能将不再降低;同等条件下,RAP掺量越大,再生混合料动态模量越大,混合料表现出更多的刚性,更趋于脆性,随着试验温度的提升,温拌再生沥青混合料的动态模量更多地显现出黏弹性特征;相同RAP含量时,热再生沥青混合料浸水后抗变形能力、抗裂能力及动态模量均高于同等条件下的温拌再生混合料;热再生条件下能融化RAP料表面旧沥青的数量比温拌条件时多,使混合料更密实,其体积特征的变化带来了性能的差异。
To study the effect of old material content on durability of warm-mix recycled asphalt mixture,the water resistance performance of mixtures were studied by freeze-thaw splitting test and moisture-induced sensitivity test(MIST),the anti-cracking performance of asphalt mixtures were studied by semi-circular bending test,the change trend of the dynamic modulus of the mixture.were studied by simple performance tester(SPT).The results show that,with an increase in recycled asphalt product(RAP)content,the dynamic modulus ratio of the asphalt mixture increases gradually after water treatment,the influence attenuation of water to the dynamic modulus is relatively low.The dissipated creep strain energy(DCSEf)of the warmmixed asphalt first increases and then decreases.an optimum RAP content in warm mix recycledasphalt mixture.There is an increase in RAP reduces the anti-cracking ability of the asphalt mixture to a certain extent and causes the mixture to develop brittleness.When the RAP content reaches a certain level,the cracking resistance performance of the recycled asphalt is no longer reduced.Under the same conditions,the greater the RAP content,the greater the dynamic modulus of the regenerated mixture,the greater the stiffness,and the more brittle the mixture.With an increase in test temperature,the dynamic modulus of the warm-mixed asphalt shows more viscoelastic characteristics.In a comparison between hot-mixed and warm-mixed asphalts with the same RAP content,the resistance to deformation,crack resistance,and dynamic modulus of the hot recycled asphalt mixture were higher than those under similar conditions.Under the condition of hot regeneration,The amount of old asphalt that RAP material is more than that of warm mix,under conditions of thermal regeneration.The higher density of the mixture and the change in volume characteristics lead to differences in performance.
To study the effect of old material content on durability of warm-mix recycled asphalt mixture,the water resistance performance of mixtures were studied by freeze-thaw splitting test and moisture-induced sensitivity test(MIST),the anti-cracking performance of asphalt mixtures were studied by semi-circular bending test,the change trend of the dynamic modulus of the mixture.were studied by simple performance tester(SPT).The results show that,with an increase in recycled asphalt product(RAP)content,the dynamic modulus ratio of the asphalt mixture increases gradually after water treatment,the influence attenuation of water to the dynamic modulus is relatively low.The dissipated creep strain energy(DCSEf)of the warmmixed asphalt first increases and then decreases.an optimum RAP content in warm mix recycledasphalt mixture.There is an increase in RAP reduces the anti-cracking ability of the asphalt mixture to a certain extent and causes the mixture to develop brittleness.When the RAP content reaches a certain level,the cracking resistance performance of the recycled asphalt is no longer reduced.Under the same conditions,the greater the RAP content,the greater the dynamic modulus of the regenerated mixture,the greater the stiffness,and the more brittle the mixture.With an increase in test temperature,the dynamic modulus of the warm-mixed asphalt shows more viscoelastic characteristics.In a comparison between hot-mixed and warm-mixed asphalts with the same RAP content,the resistance to deformation,crack resistance,and dynamic modulus of the hot recycled asphalt mixture were higher than those under similar conditions.Under the condition of hot regeneration,The amount of old asphalt that RAP material is more than that of warm mix,under conditions of thermal regeneration.The higher density of the mixture and the change in volume characteristics lead to differences in performance.
引文
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[17]李祖仲,陈拴发,廖卫东,等.改性沥青应力吸收层混合料低温抗裂性能评价[J].中国公路学报,2012,25(4):29-35.LI Zu-zhong,CHEN Shuan-fa,LIAO Wei-dong,et al.Evaluation of anti-cracking performance of modified HMA in stress absorbing layers under low temperature[J].China Journal of Highway and Transport,2012,25(4):29-35.
[18]季节,索智,许鹰,等.SMA温拌再生沥青混合料性能试验[J].中国公路学报,2013,26(5):28-33.JI Jie,SUO Zhi,XU Ying,et al.Experimental research on performance of warm-recycled mixture asphalt with SMA[J].China Journal of Highway and Transport,2013,26(5):28-33.
[19]刘唐志,朱洪洲,李佳坤,等.温拌再生沥青混合料水稳定性研究[J].武汉理工大学学报,2013,35(3):54-58.LIU Tang-zhi,ZHU Hong-zhou,LI Jia-kun,et al.Research on water stability of warm-recycled asphalt mixture[J].Journal of Wuhan University of Technology,2013,35(3):54-58.
[20]徐鸥明,韩森,高世君.沥青混合料疲劳耐久极限研究[J].武汉理工大学学报,2010,32(8):45-48.XU Ou-ming,HAN Sen,GAO Shi-jun.Research on the fatigue endurance limit of hot-mix asphalt concrete[J].Journal of Wuhan University of Technology,2010,32(8):45-48.
[21]汤文,盛晓军,谢旭飞,等.回收料掺量对温拌再生沥青混合料性能的影响[J].建筑材料学报,2016,19(1):204-208.TANG Wen,SHEN Xiao-jun,XIE Xu-fei,et al.Performance of warm mix asphalt mixture containing different RAP contents[J].Journal of Building Materials,2016,19(1):204-208.
[22]陈静云,马强.温拌-再生改性沥青SMA混合料性能研究[J].沈阳建筑大学学报:自然科学版,2012,28(2):286-291.CHEN Jing-yun,MA Qiang.Properties of warm mixrecycled modified asphalt SMA mixture[J].Journal of Shenyang Jianzhu University:Natural Science,2012,28(2):286-291.
[23]付欣,刘秋,陈拴发.基于ANSYS的带切口半圆弯曲试验参数分析[J].公路交通科技,2012,29(2):13-17.FU Xin,LIU Qiu,CHEN Shuan-fa.Parameter analysis of semi-circular bending test on notched specimen based on ANSYS[J].Journal of Highway and Transportation Research and Development,2012,29(2):13-17.
[2]李庆伟,陈雄丽.热再生沥青技术在公路路面大修工程中的应用[J].城市建设理论研究,2012(8):1-12.LI Qing-wei,CHEN Xiong-li.Application of hot recycling asphalt technology in highway pavement overhaul engineering[J].Theoretical Research on Urban Construction,2012(8):1-12.
[3]杨媛媛.浅谈沥青路面再生技术的选择与应用[J].科技创新与应用,2015(34):237-238.YANG Yuan-yuan.Selection and application of asphalt pavement regeneration technology[J].Technological Innovation and Application,2015(34):237-238.
[4]陈永建.贵州山区高速公路乳化沥青冷再生混合料技术性能及施工技术研究[D].重庆:重庆交通大学,2016.CHEN Yong-jian.Technical performance and construction technology of emulsified asphalt cold recycled mixture in Guizhou mountainous area[D].Chongqing:Chongqing Jiaotong University,2016.
[5]张东方.再生剂在热再生过程中的作用机理及评价方法[D].重庆:重庆交通大学,2017.ZHANG Dong-fang.Study on the subgrade diseases in permafrost of Qinghai-Tibet[D].Chongqing:Chongqing Jiaotong University,2017.
[6]赵永利.沥青混合料热拌再生质量控制的若干问题[R].南京:东南大学,2014.ZHAO Yong-li.Some problems in quality control of hot mix recycling for asphalt pavement[R].Nanjing:Southeast University,2014.
[7]牟柏松.高等沥青路面再生剂的研制[J].今日科苑,2007(16):157-157.MOU Bai-song.Development of recycling agent for asphalt pavement[J].Modern Science,2007(16):157-157.
[8]叶志刚.沥青路面现场热再生技术[J].北方交通,2005(12):28-29.YE Zhi-gang.On site hot recycling technology of asphalt pavement[J].Northern Communications,2005(12):28-29.
[9]季节,索智,石越峰,等.热拌及温拌再生SMA沥青混合料疲劳性能分析[J].建筑材料学报,2015,18(6):1095-1098.JI Jie,SUO Zhi,SHI Yue-feng,et al.Analysis on fatigue behaviors of hot and warm recycled SMA asphalt mixture[J].Journal of Building Materials,2015,18(6):1095-1098.
[10]杨丽英,谭忆秋,董雨明,等.热拌及温拌再生SMA沥青混合料疲劳性能分析[J].公路交通科技,2012,29(10):7-11.YANG Li-ying,TAN Yi-qiu,DONG Yu-ming,et al.Fatigue performance of warm recycled asphalt mixture[J].Journal of Highway and Transportation Research,2012,29(10):7-11.
[11]朱媚媚,王军,刘云峰,等.沥青路面就地冷再生技术在公路养护大中修工程的应用[J].科技创新导报,2010(21):134-135.ZHU Mei-mei,WANG Jun,LIU Yun-feng,et al.Application of cold recycling technology of asphalt pavement in large and medium maintenance works of highway maintenance[J].Science and Technology Innovation Guide,2010(21):134-135.
[12]刘德旺.冷再生工艺在大修工程中的应用[J].交通世界,2005(10):74-75.LIU De-wang.Application of cold recycling technology in overhaul engineering[J].Transpo World,2005(10):74-75.
[13]韦琴.旧沥青路面再生利用技术研究[D].重庆:重庆大学,2006.WEI Qin.Recycling technology of aged asphalt pavement[D].Chongqing:Chongqing University,2006.
[14] VALDES G,PEREZ-JIMENEZ F,MIRO R,et al.Experimental study of recycled asphalt mixtures with high percentages of reclaimed asphalt pavement(RAP)[J].Construction and Building Materials,2011,25(3):1289-1297.
[15] ZHAO S,BOWERS B,HUANG B,et al.Characterizing rheological properties of binder and blending efficiency of asphalt paving mixtures containing RAS through GPC[J].Journal of Materials in Civil Engineering,2014,26(5):941-946.
[16]郭乃胜,尤占平,赵颖华,等.温拌再生沥青混合料耐久性能[J].中国公路学报,2014,27(8):17-22.GUO Nai-sheng,YOU Zhan-ping,ZHAO Ying-hua,et al.Durability of warm mix asphalt containing recycled asphalt mixtures[J].China Journal of Highway and Transport,2014,27(8):17-22.
[17]李祖仲,陈拴发,廖卫东,等.改性沥青应力吸收层混合料低温抗裂性能评价[J].中国公路学报,2012,25(4):29-35.LI Zu-zhong,CHEN Shuan-fa,LIAO Wei-dong,et al.Evaluation of anti-cracking performance of modified HMA in stress absorbing layers under low temperature[J].China Journal of Highway and Transport,2012,25(4):29-35.
[18]季节,索智,许鹰,等.SMA温拌再生沥青混合料性能试验[J].中国公路学报,2013,26(5):28-33.JI Jie,SUO Zhi,XU Ying,et al.Experimental research on performance of warm-recycled mixture asphalt with SMA[J].China Journal of Highway and Transport,2013,26(5):28-33.
[19]刘唐志,朱洪洲,李佳坤,等.温拌再生沥青混合料水稳定性研究[J].武汉理工大学学报,2013,35(3):54-58.LIU Tang-zhi,ZHU Hong-zhou,LI Jia-kun,et al.Research on water stability of warm-recycled asphalt mixture[J].Journal of Wuhan University of Technology,2013,35(3):54-58.
[20]徐鸥明,韩森,高世君.沥青混合料疲劳耐久极限研究[J].武汉理工大学学报,2010,32(8):45-48.XU Ou-ming,HAN Sen,GAO Shi-jun.Research on the fatigue endurance limit of hot-mix asphalt concrete[J].Journal of Wuhan University of Technology,2010,32(8):45-48.
[21]汤文,盛晓军,谢旭飞,等.回收料掺量对温拌再生沥青混合料性能的影响[J].建筑材料学报,2016,19(1):204-208.TANG Wen,SHEN Xiao-jun,XIE Xu-fei,et al.Performance of warm mix asphalt mixture containing different RAP contents[J].Journal of Building Materials,2016,19(1):204-208.
[22]陈静云,马强.温拌-再生改性沥青SMA混合料性能研究[J].沈阳建筑大学学报:自然科学版,2012,28(2):286-291.CHEN Jing-yun,MA Qiang.Properties of warm mixrecycled modified asphalt SMA mixture[J].Journal of Shenyang Jianzhu University:Natural Science,2012,28(2):286-291.
[23]付欣,刘秋,陈拴发.基于ANSYS的带切口半圆弯曲试验参数分析[J].公路交通科技,2012,29(2):13-17.FU Xin,LIU Qiu,CHEN Shuan-fa.Parameter analysis of semi-circular bending test on notched specimen based on ANSYS[J].Journal of Highway and Transportation Research and Development,2012,29(2):13-17.