Construction technology of scraping putty

Technological process: cleaning at the grass-roots level → spraying glue → caulking, locally scraping putty → treating wall cracks with cloth → fully scraping putty → first brushing and spraying → filling putty → polishing wall → second brushing and spraying → brushing and spraying live mortar 2 1. 1.2 The floating sand, dust and pimples on the concrete and plastering surfaces should be cleaned at the grass-roots level. 2 1. 1.3 brush (spray) building glue or varnish concrete wall surface should be brushed (sprayed) with glue or varnish for back cover before putty is blown. In order to enhance the cohesive force between putty and base surface, brush (spray) should be uniform and should not be missed. The weight ratio of latex water is clear water: latex = 5: 1. 2 1. 1.4 fill the gaps, and locally level the gaps and potholes with plastering putty. Putty should be filled and smoothed, and excess putty should be collected. After the putty is dry, it should be smoothed with sandpaper, and the floating dust should be swept away in time. If there are potholes, they should be filled with putty again. The mixing ratio of gypsum putty is gypsum powder: latex liquid: cellulose aqueous solution = 100: 45: 60, in which the concentration of cellulose aqueous solution is 3.5%. 2 1. 1.5 wall cracks should be filled with caulking putty, and a layer of glass grid cloth or silk cloth should be pasted on it. The cloth should be glued to the cracks with emulsion, and the cloth should be straight and smooth when glued. Width of covering cloth when scraping putty. 2 1. 1.6 full putty scraping. For intermediate brush (spray) slurry, putty can be fully scraped (ordinary spray does not have this process), and for advanced brush (spray) slurry, putty can be fully scraped for two or three times. When operating, scrape back and forth, pay attention to the top, bottom, left and right, and scrape between two scrapers without leaving putty. Every time putty is dried, it should be polished with sandpaper and the line angle should be clear. After polishing, the floating dust should be swept away. If painted with colored mud, a proper amount of pigment should be added to the putty. The putty can be moisture-proof putty. 2 1. 1.7 Before brushing (spraying) for the first time, brush the periphery of doors and windows with 20㎝ wide hair. If the wall and ceiling are designed with two colors of slurry, use a 20㎝ wide brush slurry at the color separation place, and then spray the slurry on a large area. The order of shotcrete is as follows: ceiling first, wall later, top first, bottom later. The nozzle should be 20~30㎝ away from the wall, and the moving speed should be even and stable in time to make the coating thickness uniform. When the roof is a trough plate, the internal corners around the concave surface should be sprayed first, and then the middle plane (commonly used latex paints are Nippon Paint, Medeli, Shilili, Meishili and Dulux). 2 1. 1.8 After the first putty coating, the pits and potholes on the surface shall be leveled with putty. After the putty is dry, gently polish it with fine sandpaper and sweep away the floating dust to achieve a smooth and flat surface. This process is not needed for ordinary gunning, but for intermediate or advanced gunning. 2 1. 1.9 The materials and operation methods for the second and third brushing (spraying) are the same as those for the first brushing. After the second dry pulp, gently grind off the floating powder with fine sandpaper and clean it up, and then spray the pulp for the third time. Brush (spray) times can be determined by brush grade, subject to quality requirements. 2 1. 1. 10 brush (spray) the reactive cement slurry for the second time. After the slurry is dried, gently grind off the dust and splash points with sandpaper and clean them up, and then brush (spray) the reactive slurry. The amount of glue in the cross pulp should be increased appropriately compared with that in the secondary pulp to prevent the brush (spray) pulp coating from falling off. 21.1.11Brush (spray) the internal wall coating and scrub-resistant coating as the base course. When using scrub-resistant interior wall paint for surface coating, it is necessary to refer to the product manual for treatment and spraying or brushing. 2 1. 1. 12 winter construction: the interior wall is painted (sprayed) under heating conditions, and the indoor temperature is not lower than 10℃ and the humidity is not higher than 60%.