Cement ground construction points Cement ground roll reasons
The cement floor is the foundation of many of our ground construction projects. At the same time, the cement floor also solves the problem of the insufficiency of the soil on the ground in the past. Therefore, the cement ground is to a large extent able to better resolve the dependence on the ground in our production and life. . Next, Xiao Bian will introduce the key points for the construction of cement floors and the reasons for the cement floors to be sanded.
Cement floor construction points
1, first sweep away the dust on the grassroots level, brush with a wire brush and tweezers brush, remove the mortar skin and ash layer, with a fire alkali solution brush off the oil on the grassroots, and use the water in time to flush the lye, in advance Sponge the floor one day a day.
2. According to the +1.0m horizontal control line on the wall, measure the elevation of the surface layer downwards and play it on the wall. Then determine the thickness of the surface layer mortar according to the horizontal line of the surface layer. If the floor is found to be too thin (low In 2cm) or too thick (above 5cm) to be adjusted, and the adjusted elevation in the public site to do a fixed paint mark, and then pull the horizontal line began plastering cake (5 × 5cm), horizontal and vertical spacing of 1.5 ~ 2. Om, the surface of the ash cake is the elevation of the cement mortar floor surface. If the room is relatively large, in order to ensure the overall surface flatness, it is also necessary to punch ribs. The mix ratio of the mortar material of plastering ash cake and standard ribs is the same as that of the ground mortar.
3, mixing mortar. The volume ratio of cement mortar should be 1:2.5 (cement:sand), its consistency should not exceed 35m, and its strength grade should not be less than M15. In order to control the amount of water added, stirring is performed using a mixer and the color is uniform.
4, before the laying of cement mortar, brushing a layer of cement slurry, water-cement ratio of 0.4-0.5, do not brush the area is too large, with the brush with the shop surface mortar.
5. After the cement slurry is applied, spread the cement mortar and spread the mortar between the ash cakes. Then use a wood scraper to level the ash cake, knock out the used ash cake and fill it with mortar.
6. After the wooden scraper is flattened, it is immediately rewound with a wooden trowel, retreating from the inside out, and check the flatness with a 2-meter ruler at any time. In particular, check the smoothness of the plaster under the wall to ensure that it is flat. The small corner of the wall is flat and the flatness of the area where the pipe entrance meets the wall needs to be ensured.
The reason of cement floor turning sand
For the problem of cement surface sanding, it is not just a simple problem that leads to sanding on the ground. In addition to the problem of excessive water-cement ratio, there may be issues such as irrational gravel aggregates and high mud content. This problem is mainly due to the unreasonable gradation of aggregates, and the excessively fine earth sand can easily cause sanding on the ground, affecting the early hydration of cement and the condensation of concrete. That is to say, such problems are mainly due to problems in the materials chosen. .
The reason of cement floor turning sand
In addition, improper maintenance of the ground is also one of the important causes of ground sanding. The pre-conservation work of our cement ground is also very important. If it is not properly maintained or maintained, exposure or strong wind will cause a large amount of water loss on the concrete surface, and the surface will not be fully hydrated, which will directly affect the strength of the cement floor. The problem is that the strength of the concrete floor is low, so that it is easy to cause sanding problems during use.
Three reasons for cement floor rocking
For the problem of cement floor rocking, the main problem is that the strength of the concrete floor is not sufficient due to problems such as maintenance of various construction materials. Therefore, many engineering problems have arisen, and the problem of surface sanding has become apparent. Therefore, we are mainly looking at the issue of the lack of strength in the concrete floor. It is easy to find the reason for finding the main problem.
Editor's summary: The main points of the cement floor construction and the reasons for the cement floor turning are introduced here and I hope to help everyone. If you want to know more related information, you can pay attention to this website information.
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