农村冬修水利中所使用的预制混凝土管,管与管之间的接头如何密封?现介绍以下三种方法供参考。 1.掺防水剂水泥砂浆箍接法先在接头处涂一层灰砂垫层(水泥与砂的比例为1:3),然后将配有氯化铁防水剂的水泥膏(氯化铁与水泥的比例为1:40)涂于混凝土管子口,把两管对正挤紧,再用配有防水剂的砂浆(氯化铁与水泥、砂的比例为0.025:1:1) How to seal the joint between pipe and pipe in precast concrete pipe used in rural winter water conservancy? The following three methods are introduced for reference. 1. Add water-repellent cement mortar and hoop connection method First, apply a layer of sand cushion at the joint (the ratio of cement to sand is 1:3), and then add the cement paste with ferric chloride waterproofing agent (ferric chloride and The proportion of cement is 1:40. Apply to the mouth of the concrete pipe. Squeeze the two pipes and use a mortar with a waterproof agent (ratio of ferric chloride to cement and sand is 0.025:1:1).