What is the practice of outdoor cement floor

Professional pipeline installation → find elevation, play surface control line → grass-roots level treatment → watering wet → plaster cake → brush plain cement paste bonding layer → paving concrete → wooden trowel rubbing → iron trowel pressed the first → the second calendaring → the third calendaring → maintenance.

2. construction method

(1) clean up the grass-roots level should be carefully clean up the grass-roots level, first with a chisel initial cleanup, and then with an iron steel wire brush, so that the efficiency of the work is fast, the effect is good, in the event that the surface is stained with grease and dirt, with a 3% to 10% concentration of kerosene aqueous solution to clean up, and finally rinsed clean with water, pay special attention to the edges, corners, and the staircase platform at the corner of the cleanup.

(2) watering and moistening to be sufficient In order to ensure that the cement floor does not produce cracks, and the grass-roots level of better bonding, the need for segmented water construction. In the construction of the day before watering wet grass-roots level. Special attention must be paid to the perimeter of the wall must be re-watering, to prevent inconsistent drying and shrinking of the surface of the concrete floor, not only difficult to operate, but also affect the effect of the surface layer.

(3) brush plain cement slurry to professional to timely. Usual construction, this process are comrades ignored, the construction of dry cement are first sprinkled, and then water with a broom brush, and some of the phenomenon of waterlogging. And I used the following method in the flower site: use a bucket of water and ash ratio of 1:0.50 of the cement slurry mix well, such as grass-roots water are swept clean in advance. Brush cement slurry choose a responsible person specialized construction. Brush cement paste time according to the speed of the paving brush, that is, at any time to pave concrete, at any time to brush the cement paste

(4) plaster cake According to the elevation line, in the ground to do the gray cake, spacing 1.5m-2m an appropriate. When there is a floor drain or slope requirements are good slope.

(5) fine stone concrete floor (floor) surface practice should be strict. Flower and wood project floor (floor) surface layer with 30 thick C20 fine stone concrete. Floor (ground) surface construction is the key to the entire construction process, the other process of construction and then good, this process is ignored, then the whole floor (ground) surface is not good. I first start from the raw material control. Cement using 425 # general silicon, yellow sand using coarse (mud content should not be greater than 3%) sand, stone using specifications 5 ~ 15 mm (mud content should not be greater than 2%), with the ratio of 1:1.738:3.23, water-cement ratio of 1:0.50. (weight ratio) concrete construction, I specialize in the mixing station, often check whether there is an error in the ratio of water-cement ratio, the construction of the ratio is correct. Vertical transportation is normal operation. Thus ensure that the concrete surface layer continuous pouring.

(6) after the first flattening, the concrete ground condensation to the person stepped on the footprints but not subsidence, with an iron trowel pressure the second time. Requirements do not miss the pressure, the upper surface of the flat and out of the light.

(7) concrete surface layer before the final condensation of the third calendaring, the feeling is that the trowel wipe up no longer trowel pattern, with an iron trowel to the second calendaring trowel pattern left behind flattened, compacted, calendared. In order to achieve the standard degree required by the project. (8) After the concrete surface layer is calendered, spread sawdust to cover and water maintenance within 24 hours, and maintain it continuously for not less than 7 days at room temperature to make it harden under warm and moist conditions. Pay special attention to the maintenance period is not allowed to press heavy objects and collision.