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.
Key words
WG-Ⅰ warm mix additive /
asphalt concrete /
viscosity /
needle penetration /
softening temperature /
ductility /
splitting test /
performance test
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References
[1] 孙君森,王为标,林鸿镁.碾压混凝土坝的沥青防渗[M].西安:陕西人民出版社,2003.
[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.
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