施工技术 2016年3月上 84 CONSTRUCTIONTECHNOLOGY 第45卷第5期 DOI:10. 7672/sgjs2016050084 搅拌工艺对水泥沥青砂浆早期性能的影响研究* 刘云鹏，刘沐宇 （武汉理工大学道路桥梁与结构工程湖北省重点实验室，湖北武汉430070） [摘要】研究了不同搅拌工艺下配制的水泥沥青砂浆的早期性能，试验结果表明，干料和沥青乳液的加人顺序对水 泥沥青砂浆的工作性能、含气量和抗压强度有明显影响，先加人沥青乳液的试样具有较高的含气量、较低的强度以 及较好的流动度保持率。
研究了铝粉不同加人方式对水泥沥青砂浆膨胀率及含气量的影响，试验结果表明，铝粉 的加入方式对水泥沥青砂浆的膨胀率及含气量影响很大，初始慢搅1min后加人铝粉再慢搅30min的加人方式可 以得到膨胀率较合适的水泥沥青砂浆及较稳定的含气量。
[关键词］铁路工程；水泥沥青砂浆；搅拌工艺；早期性能；铝粉；膨胀率；含气量 [中图分类号】TU528 [文献标识码]A[文章编号】1002-8498（2016）05-0084-04 StudyonInfluenceofMixingMechanismonEarlyAgePropertiesof Cement Asphalt Mortar Liu Yunpeng, Liu Muyu （HubeiKey Laboratory of Roaday Bridge and Structure Engineering，WuhanUniversity of Technology， Wuhan,Hubei 430070.China) Abstract;The effect of different mixing processes on the early properties of cement asphalt mortar was studied.The results indicate that the mixing sequence of mixtures and asphalt emulsion has a significant effect on the workability，air content and pressive strength of cement asphalt mortar，when the asphalt emulsion and water were uniformly mixed before the mixtures were added to the liquid， the samples prepared has high air content, low pressive strength and stable fluidity. The effct of adding method of aluminum powder on the expansion rate and air content was also studied. The results indicate that the expansion rate and air content were greatly influenced by the adding method. Cement asphalt mortar prepared with the adding method of low mixing for 1min before adding aluminum powder and then slow mixing for 30min has proper expansion rate and stable air content. Key words:railroads; cement asphalt mortar; mixing mechanism; early age properties; aluminum powder;expansion rate；air content 水泥沥青砂浆（cement asphalt mortar，CAM）主 钢轨 要由水泥、沥青乳液、细骨料和多种高效外加剂组 CA砂浆 成，是一种应用于高速铁路板式无碴轨道结构填充 轨道板 层的关键有机-无机复合材料（见图1)，主要起支撑 凸形挡台 混凝土底座 列车自重、弹性减振、调整轨道几何状态的 作用[1]。
图1板式无碴轨道结构 CAM位于轨道板和混凝土底座之间一段扁平 Fig.1 Slab track structure 狭窄的封闭空间内，在实际施工过程中，为了保证 灌注顺利进行并达到良好的填充效果，要求CAM具 国家自然科学基金项目（51372184：51172173）：中央高校基本科研 有...
