橡胶粉改性水泥乳化沥青砂浆抗水侵蚀性能研究
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摘要
水泥乳化沥青砂浆广泛应用于板式无砟轨道调平减振结构层,其长期受到荷载、雨水和干湿循环等作用,为了保障高铁行驶安全,要求水泥乳化沥青砂浆具有足够的抵抗水侵蚀性能。试验通过加入占水泥质量0、2%、4%、6%、8%、10%的废旧轮胎橡胶粉配制成橡胶粉改性水泥乳化沥青砂浆试样,分别进行了冻融劈裂强度、干湿循环强度损失、动水冲磨等抗水侵蚀性能试验,结果表明,橡胶粉掺量影响橡胶粉改性水泥乳化沥青砂浆的抗水侵蚀性能,当橡胶粉掺量为4%时制备的橡胶粉改性水泥乳化沥青砂浆抗水侵蚀性能最佳。
Cement emulsified asphalt mortar is widely used in slab damper structure layer of slab ballastless track. It has long been affected by load,rainwater and dry and wet circulation. In order to ensure the safety of high-speed rail,cement emulsified asphalt mortar is required to have sufficient resistance to water erosion. The samples were prepared by adding rubber powder of 0,2%,4%,6%,8% and 10% cement powder into rubber powder modified cement emulsified asphalt mortar. The freeze-thawing splitting strength,dry and wet circulation strength loss,running water erosion and other water erosion resistance properties were tested. The results show that the rubber powder content affects the water erosion resistance of the rubber powder modified cement emulsified asphalt mortar. When the rubber powder content is about 4%,the prepared modified cement emulsified asphalt mortar has the best water erosion resistance performance.
Cement emulsified asphalt mortar is widely used in slab damper structure layer of slab ballastless track. It has long been affected by load,rainwater and dry and wet circulation. In order to ensure the safety of high-speed rail,cement emulsified asphalt mortar is required to have sufficient resistance to water erosion. The samples were prepared by adding rubber powder of 0,2%,4%,6%,8% and 10% cement powder into rubber powder modified cement emulsified asphalt mortar. The freeze-thawing splitting strength,dry and wet circulation strength loss,running water erosion and other water erosion resistance properties were tested. The results show that the rubber powder content affects the water erosion resistance of the rubber powder modified cement emulsified asphalt mortar. When the rubber powder content is about 4%,the prepared modified cement emulsified asphalt mortar has the best water erosion resistance performance.
引文
[1]徐浩,王平,曾晓辉.高速铁路板式无砟轨道CA砂浆研究现状与展望[J].铁道标准设计,2013(11):1-5.
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[6]MCG Juenger,HM Jennings.Examining the relationship between the microstructure of calcium silicate hydrate and drying shrinkage of cement pastes[J].Cement and Concrete Research,2002,32(2):289-296.
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[8]颜华,胡华锋,曾晓辉,等.静水作用下板式无砟轨道CA砂浆力学性能变化[J].高速铁路技术,2014(4):7-10.
[9]田冬梅,元强,朱蓉,等.水对水泥乳化沥青砂浆静态力学性能的影响[J].硅酸盐学报,2012(11):1544-1552.
[10]覃峰,李春.沥青混合料基灌注式半刚性路面抗腐性能研究[J].公路,2015(10):28-34
[11]Terrel R L,Shute J W.Strategic highway research program:summary report on water sensitivit[R].Washington D C:TRB,National Research Council,1989.
[12]覃峰,马福荣,黄琼念,等.橡胶粉水泥混凝土路面冲磨性能试验研究[J].铁道标准计,2010(10):43-47.
[13]覃峰,杨胜坚,陆宏新.橡胶粉水泥稳定碎石基层水稳定性试验研究[J].铁道标准计,2010(5):25-29.
[2]尹晓文,傅强,董传卓,等.干湿循环对CA砂浆力学性能影响的试验研究[J].长江科学院院报,2013,30(11):91-96.
[3]李悦,孙宏友,曾晓辉,等.不同浸水历时及温度对CA砂浆力学性能的影响研究[J].铁道标准计,2015(2):40-42.
[4]傅强,谢友均,郑克仁,等.沥青对水泥沥青砂浆力学性能的影响[J].硅酸盐学报,2014(5):642-647.
[5]徐浩,王平,孙宏友,等.不同浸水历时水泥乳化沥青砂浆动态受压试验[J].建筑材料学报,2015(5):861-866.
[6]MCG Juenger,HM Jennings.Examining the relationship between the microstructure of calcium silicate hydrate and drying shrinkage of cement pastes[J].Cement and Concrete Research,2002,32(2):289-296.
[7]覃峰.锰渣矿粉沥青混合料抗腐性能研究[J].新型建筑材料,2012(3):43-46.
[8]颜华,胡华锋,曾晓辉,等.静水作用下板式无砟轨道CA砂浆力学性能变化[J].高速铁路技术,2014(4):7-10.
[9]田冬梅,元强,朱蓉,等.水对水泥乳化沥青砂浆静态力学性能的影响[J].硅酸盐学报,2012(11):1544-1552.
[10]覃峰,李春.沥青混合料基灌注式半刚性路面抗腐性能研究[J].公路,2015(10):28-34
[11]Terrel R L,Shute J W.Strategic highway research program:summary report on water sensitivit[R].Washington D C:TRB,National Research Council,1989.
[12]覃峰,马福荣,黄琼念,等.橡胶粉水泥混凝土路面冲磨性能试验研究[J].铁道标准计,2010(10):43-47.
[13]覃峰,杨胜坚,陆宏新.橡胶粉水泥稳定碎石基层水稳定性试验研究[J].铁道标准计,2010(5):25-29.