Cement mortar plastering interface is a rigid interface, which is generally suitable for rainwater water supply pipeline with good soil, or sewage pipeline branch pipe above groundwater level. This interface can be used for tongue and groove pipes and flat pipes. 1. program of interface tapping The program of interface tapping is: pouring concrete for pipe socket? Is the internal seam of the pipe socket section hooked? Scrape and clean the joint between the pipe belt and the pipe skin and the foundation. What is the inner seam support pad on the upper part of the pipe socket? Tape? Hook and twist the internal seam above the socket? Interface maintenance. 2. The mixture ratio of cement mortar shall be implemented as stipulated in the design. 3. Tape plastering tools include paddles, brushes, iron trowels and arc trowels. 4。 Tape wiping interface 1) Operating points Before tape wiping (1), clean the nozzle cover and tape, and brush with cement slurry. (2) When plastering the first layer of mortar (undercover mortar), attention should be paid to alignment, so that the pipe joint is within the scope of the pipe belt, and the thickness is about 1/3 belt thickness, and it should be compacted to make it firmly bonded with the pipe wall, and the surface should be painted with trunking, so as to better combine with the second layer (the pipe diameter less than D400mm can be plastered at one time). (3) After the initial setting of the first layer of mortar (painted with varnish), apply the second layer, flatten it with arc trowel, and then compact it with trowel. (4) At the junction of the belt and the foundation (if the foundation concrete has hardened, it needs to be washed with south wool and brushed with cement slurry), triangular ash should be filled, and brick molds can be used for large needle diameter to prevent mortar deformation. 2) After the curing tape is pasted, it should be immediately covered with wet paper tape and covered with straw bag or straw curtain. After 3-4 hours, it should be watered and maintained to avoid cracking and falling off. 3) pipe diameter? D700mm pipe internal seam should be twisted (1). When pouring concrete, the internal seam of the pipe socket should be twisted. The internal seam above the pressure vessel pipe seat should be twisted after the final setting of the pipe belt; You can also twist the belt first and then wrap it, that is, before wrapping the belt, put the inner bracket on the pipe seam, fill it with mortar from the outside, then remove the inner bracket, twist the belt evenly in the inner seam, and then wrap the belt. (2) When screwing the inner seam of the pipe, the inner seam should be filled with cement mortar in the pipe first, and then screwed tightly repeatedly, and the mortar shall not be higher than the inner wall of the pipe. 4) The internal seam torsion of pipes with pipe diameter < D700 mm should be coordinated with the pouring pipe socket, and the mortar flowing into the pipe should be leveled by dragging it back and forth with sacks or other tools. 5. Anti-freezing health measures for cement mortar plastering interface in winter (1). After plastering, place prefabricated wooden frame on the pipe belt, or cover the loose straw with a thickness of 10cm first, and then cover the straw curtain. (2) Grass curtain covers 1-3 floors, which is selected according to the temperature. (3) Keep it sealed and windproof. When the strength reaches more than 50%, cover it with fill soil to avoid freezing. (4) When cement mortar has anti-freezing requirements, chlorine salt should be added when mixing cement mortar.