Construction technology of cement self leveling at

2022-07-22
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Cement self leveling is a kind of ground construction technology. It is a liquid substance mixed with multiple materials and water. After pouring into the ground, it can flow according to the uneven situation of the ground, automatically level the ground and realize rapid drying. Since the cement self leveling construction process is related to the leveling of the ground, the construction process must be strictly followed. The following editor will briefly introduce the relevant contents of cement self leveling construction technology, hoping to be useful to you

cement self leveling is a ground construction technology. It is a liquid substance mixed with multiple materials and water. After pouring into the ground, it can flow according to the uneven situation of the ground, automatically level the ground and realize rapid drying. Since the cement self leveling construction process is related to the leveling of the ground, the construction process must be strictly followed. The following editor will briefly introduce the relevant contents of cement self leveling construction technology, hoping to be useful to you

cement self leveling construction technology

cement self leveling is divided into two categories: cushion self leveling and surface self leveling. Cushion self leveling is the self leveling used under wood floors, plastic floors and carpets. Generally, the quality of each item is relatively weak; The self leveling of the surface layer is directly used as the ground, and can also be used as the basic ground of the floor paint. All technical requirements are relatively high

1. Requirements for foundation ground:

foundation cement ground shall be clean, dry and flat. The details are as follows:

(1) there should be no empty shell between the cement mortar and the ground

(2) there shall be no sand on the cement mortar surface, and the mortar surface shall be kept clean

(3) the cement surface must be flat and the height difference within two meters is required to be less than 4mm

(4) the ground must be dry, and the moisture content measured with a special test instrument shall not exceed 17 ℃

(5) the cement strength of base course shall not be less than 10MPa

2. Preparation before construction:

(1) before the construction of self leveling cement, the foundation ground must be polished with a grinder to remove impurities, floating dust and sand particles on the ground. Smooth the ground with more local elevation. Sweep away the dust after polishing and vacuum it

(2) after cleaning the ground, it must be treated with surface treatment agent before applying self leveling cement. Dilute the treatment agent according to the manufacturer's requirements, and evenly apply the ground treatment agent on the ground in the direction of horizontal first and then vertical with a non depilating wool roller. Ensure that the coating is uniform without leaving gaps. After coating the treatment agent, the construction of self leveling cement can be carried out after waiting for a certain time according to the different product properties of different manufacturers

(3) cement surface treatment agent can increase the adhesion between self leveling cement and the ground and prevent the shelling and cracking of self leveling cement

it is recommended to brush the ground treatment agent twice

3. Construction environment:

the working area is allowed to be slightly ventilated, but the doors and windows should be closed to avoid air flow during and after construction. During construction and within one week after construction, the indoor and ground temperature should be higher than 10 ℃. The relative humidity of ground concrete shall be less than 95%

4. Self leveling construction:

(1) prepare a large enough bucket, add water in strict accordance with the water cement ratio of the self leveling manufacturer, and thoroughly mix the self leveling with an electric mixer. Mixing is carried out in two times, usually about 5-mdash for the first time; 7 minutes, pause for 2 minutes, let it react, and then stir for about 3 minutes. The mixing shall be thorough, and there shall be no lumps or dry powder. The mixed self leveling cement must be fluid

(2) try to use the stirred self leveling within half an hour. Pour the self leveling cement on the ground, open the self leveling target with a toothed target, and target the areas of different sizes according to the required thickness. After it is naturally leveled, use a toothed roller to roll vertically and horizontally on it to release the gas and prevent foaming. Special attention should be paid to the flatness of the self leveling cement lap joint

(3) according to the temperature, humidity and ventilation of different phenomena, self leveling cement needs 8— It can be completely dried after 24 hours, and the next construction cannot be carried out before it is completely dried

☆★ attention to cement self leveling winter construction

the biggest natural obstacle to cement self leveling winter construction is the temperature problem. When the surface temperature is very high, the cement self leveling is not recommended for construction. The principle is still a hydration reaction problem. Low temperature is the hydration reaction is too slow, and high temperature is the water volatilization is too fast. Before the cement self leveling and water have not completed the reaction in time, the water volatilizes first, resulting in insufficient water, which will also produce many quality problems

generally speaking, cement self leveling in winter construction emphasizes temperature, so the construction basically outdoors is suspended (in fact, most of the cement self leveling is only used indoors), and indoor construction can't be killed with a stick. Not all ground projects can't be constructed, but we need to create some conditions for ground construction more actively. Too high or too low temperature is a great obstacle to cement self leveling

I will introduce the relevant information about cement self leveling construction technology here. I hope this article is helpful to you. If there is anything else you don't understand, you can follow the information channel, and we will answer it for you as soon as possible

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