水泥沥青复合砂浆拌合物乳化沥青破乳过程研究

发布时间：2018-06-22 19:52

本文选题：CA砂浆 + 乳化沥青　；参考：《哈尔滨工程大学学报》2015年07期

【摘要】：针对水泥沥青复合砂浆(CA砂浆)中乳化沥青的破乳过程,从CA砂浆固化过程中体系的粘度、颗粒粒径变化、水泥掺量对乳化沥青破乳的影响及乳化沥青的聚集过程的角度,分析了乳化沥青的破乳过程及其影响因素。研究表明:减水剂对乳化沥青粘度变化有较大影响,减水剂的用量越多,CA胶浆在低粘度状态下的保持时间越长,减水剂可调节乳化沥青的破乳速度。CA砂浆中乳化沥青的破乳过程分为3个阶段:水泥与乳化沥青的接触阶段、动态平衡阶段及加速破乳阶段。当水泥含量较多时,水泥颗粒被沥青包裹程度较小,水化速率较快,促进了乳化沥青的破乳和聚集。通过光学显微镜分析表明,CA砂浆中乳化沥青的破乳过程即是沥青颗粒的聚集结合过程。
[Abstract]:In view of the demulsification process of emulsified asphalt in cement asphalt composite mortar (CA mortar), the influence of viscosity, particle size, cement content on emulsified asphalt demulsification and the aggregation process of emulsified asphalt are discussed. The demulsification process of emulsified asphalt and its influencing factors were analyzed. The results show that the water reducing agent has great influence on the viscosity change of emulsified asphalt, and the more the amount of water reducing agent is, the longer the retention time of CA slurry is under the condition of low viscosity. The demulsification process of emulsified asphalt in CA mortar can be divided into three stages: the contact stage between cement and emulsified asphalt, the dynamic equilibrium stage and the accelerated demulsification stage. When the cement content is high, the cement particles are encapsulated by asphalt and the hydration rate is faster, which promotes the demulsification and aggregation of emulsified asphalt. The analysis of optical microscope shows that the demulsification process of emulsified asphalt in CA mortar is the aggregation and binding process of asphalt particles.
【作者单位】：哈尔滨工业大学交通科学与工程学院;
【基金】：国家自然科学基金资助项目(51078114)
【分类号】：TQ177.6

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