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

Experiment of the cementitious capillary crystalline waterproofing material on autoclaved PHC 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。

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.