水泥基渗透结晶型防水材料在蒸压PHC管桩混凝土中应用的试验研究

摘要

The autoclaved PHC pile is widely used in the project,however the pile will easily have tiny crack in the process of produc-tion and construction.Based on the good crack repairing function of the cementitious capillary crystalline waterproofing material ,re-searched the influence of mixed and brushed cementitious capillary crystalline waterproofing material on the pile.The crack imitated by ap-ply different levels of stress in the pile concrete,and put the concrete into the air,tap water and saline water curing environment for 7 and 28 day.The results showed that mixed cementitious capillary crystalline waterproofing material cannot repair the crack of pile concrete , brushed cementitious capillary crystalline waterproofing material maybe repair the crack of pile concrete.%蒸压PHC管桩是广泛应用的一种桩基材料，然而在生产和施工中桩身容易产生微裂纹。鉴于水泥基渗透结晶型防水材料具有良好的裂缝修复能力，选用掺入型和涂刷型两种水泥基渗透结晶防水材料，通过对管桩混凝土试件施加不同应力水平的模拟裂纹，分别在空气、自来水、盐水等三种方式下养护，对比研究其对管桩混凝土裂缝的修复能力。研究结果显示，掺入型防水材料对管桩混凝土裂缝基本无修复能力，不适用于管桩混凝土，而涂刷型防水材料对管桩混凝土裂缝可能有一定修复能力。