WG-Ⅰ温拌剂对水工沥青混凝土性能的影响
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摘要
通过研究WG-Ⅰ温拌剂对水工沥青以及沥青混凝土性能的影响,得到了温拌剂的应用条件及方式;通过检测不同掺量WG-Ⅰ温拌剂对水工90号沥青的黏度、三大指标(针入度、软化点、延度)、密度的影响,确定采用温拌剂掺量为4%对不同老化次数后的沥青性能进行试验,研究沥青的抗老化性能。采用温差拌合法,制备不同温拌剂掺量的沥青混凝土马歇尔试件进行劈裂性能试验,确定采用2%的温拌剂掺量制备温拌沥青混凝土试件进行弯曲、拉伸、压缩试验,并与常规沥青混凝土进行性能试验对比。研究表明:WG-Ⅰ温拌剂有助于降低沥青的黏度,提升沥青三大指标及高温抗老化能力;温拌沥青混凝土在性能方面表现良好,应变能力有大幅度提高,有利于提升沥青混凝土适应变形及自愈的能力。因此,WG-Ⅰ温拌剂可作为水工沥青混凝土的温拌材料,达到节省工程成本、缩短工期以及保护环境的目的。
The effects of WG-Ⅰ warm mix additive(WMA) on the performance of hydraulic asphalt and asphalt concrete are investigated. First of all, the effects of adding different dosages of WMA on three indicators(needle penetration, softening temperature, and ductility) and viscosity as well as density of No. 90 hydraulic asphalt are inspected, and the influence of WMA as of 4% dosage at different aging times on the performance of asphalt is also examined. Furthermore, Marshall specimens of asphalt concrete mixed with different dosages of WMA are prepared for splitting test to obtain a proper WMA content as 2%. Subsequently, the asphalt concrete specimens with 2% WMA are used for bending test, tensile test, and compression test. Ordinary asphalt concrete specimens are also tested for comparison. Research findings demonstrate that WG-1 WMA is conducive to reducing the viscosity of asphalt, and in the meantime enhancing the aforementioned three indicators. Asphalt concrete mixed with WMA is of good performances with strain capacity improving remarkably, favorable for asphalt's ability of self-healing and adapting to deformation of asphalt. In conclusion, WG-1 WMA can be used as a warm mix material for hydraulic asphalt concrete in the purpose of saving cost, shortening construction period, and protecting environment.
The effects of WG-Ⅰ warm mix additive(WMA) on the performance of hydraulic asphalt and asphalt concrete are investigated. First of all, the effects of adding different dosages of WMA on three indicators(needle penetration, softening temperature, and ductility) and viscosity as well as density of No. 90 hydraulic asphalt are inspected, and the influence of WMA as of 4% dosage at different aging times on the performance of asphalt is also examined. Furthermore, Marshall specimens of asphalt concrete mixed with different dosages of WMA are prepared for splitting test to obtain a proper WMA content as 2%. Subsequently, the asphalt concrete specimens with 2% WMA are used for bending test, tensile test, and compression test. Ordinary asphalt concrete specimens are also tested for comparison. Research findings demonstrate that WG-1 WMA is conducive to reducing the viscosity of asphalt, and in the meantime enhancing the aforementioned three indicators. Asphalt concrete mixed with WMA is of good performances with strain capacity improving remarkably, favorable for asphalt's ability of self-healing and adapting to deformation of asphalt. In conclusion, WG-1 WMA can be used as a warm mix material for hydraulic asphalt concrete in the purpose of saving cost, shortening construction period, and protecting environment.
引文
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[11] 张泽宇,李传强,肖婷婷,等.RPR型温拌剂对沥青性能影响的研究[J].设计与试验,2016,33(1):67-70.
[12] 魏毅,戴跃玲.灰色系统理论在研究沥青老化中的应用[J].抚顺石油学院学报,2002,22(3):4-7.
[13] 戴咏川,戴承远.石油沥青的软化点和化学族组成之间的关联关系探究[J].石油沥青,2003,17(2):50-53.
[14] 王永刚,廖克俭,丛玉风,等.沥青化学组成与其使用性能间的灰熵分析[J].石油沥青,2003,17(4):25-28.
[15] 田晓.石油沥青老化/硬化机理研究[D].北京:中国石油大学,2009:27-31.
[2] 郭平,祁峰,弥海晨.温拌沥青混合料的路用性能[J].长安大学学报(自然科学版),2010,30(3):10-13.
[3] 徐世法,颜斌,季节,等.高节能低排放型温拌沥青混合料的技术现状与应用前景[J].公路,2005(7):195-198.
[4] LI Bo,LIU Jian-xun,SU Xiu-li.Effects of Compaction Method and Temperature on Warm Mix Asphalt[J].Advanced Materials Research,2011,255-260:3185-3189.
[5] 郭红兵,陈铨发.Aspha-min温拌沥青混合料技术现状与路通性能[J].中外公路,2008,28(2):152-155.
[6] 杨树人.温拌添加剂对沥青和沥青混合料性能的影响[D].重庆:重庆交通大学,2008.
[7] CLARK R S,HUGHES T,WEATHERBEE J.Evaluation of Asphalt Cement Characteristics and Field and Lab Performance of High RAP Warm Mix Asphalt Using Hypertherm WMA Technology[C]//2010 Annual Conference of the Transportation Association of Canada.Halifax,Nova Scotia,2010.
[8] SENGOZ B,OYLUMLUOGLU J.Utilization of Recycled Asphalt Concrete with Different Warm Mix Asphalt Additives Prepared with Different Penetration Grades Bitumen[J].Construction and Building Materials,2013,45:173-183.
[9] 孙静,李中秋,赵毅,等.Aspha-min温拌剂沥青混合料路用性能研究[J].中外公路,2016,36(4):280-283.
[10] 张争奇,宋亮亮,程飞.不同温拌剂对沥青混合料性能影响研究[J].武汉理工大学学报,2014,36(3):53-58.
[11] 张泽宇,李传强,肖婷婷,等.RPR型温拌剂对沥青性能影响的研究[J].设计与试验,2016,33(1):67-70.
[12] 魏毅,戴跃玲.灰色系统理论在研究沥青老化中的应用[J].抚顺石油学院学报,2002,22(3):4-7.
[13] 戴咏川,戴承远.石油沥青的软化点和化学族组成之间的关联关系探究[J].石油沥青,2003,17(2):50-53.
[14] 王永刚,廖克俭,丛玉风,等.沥青化学组成与其使用性能间的灰熵分析[J].石油沥青,2003,17(4):25-28.
[15] 田晓.石油沥青老化/硬化机理研究[D].北京:中国石油大学,2009:27-31.