高温天气下水泥沥青砂浆的工作性能调整与灌注技术

Adjustment of Workability and Grouting Technique for CAM Construction Under High Temperature

针对高温天气下水泥沥青砂浆施工经常出现的工作性能损失过快及施工灌注困难等问题,从材料学原理及施工工艺两方面分析了原因并介绍了相应的解决思路与施工技术,即通过控制水泥的水化速率及提高乳化沥青的水泥适应性改善砂浆的耐高温性能,通过控制原材料温度及对预湿工艺和灌注节奏进行管控来解决高温下施工困难的问题,这有效地保证了高温天气复杂工况下水泥沥青砂浆工作性能调整及施工。

The workability of CAM is often greatly influenced by high air temperature and caused difficulty for the grouting process. The reasons were analyzed from the perspectives of both the materials science and construction technique. The solution methods were also proposed, including improving the heat resistance of mortar by controlling the cement hydration rate and improving the cement compatibility of asphalt emulsion, controlling the temperature of raw materials and controlling the pre-wetting and grouting process. These measures successfully ensured the CAM workability adjustment and construction under high temperature.