The powder shall not be added at one time.
Clean up the damaged parts, dust and easily peeled plastering layer of the concrete base surface to be poured with self leveling mortar, repair the cracks or cavities on the base surface, polish with a rotary grinder, dust suction, measure the pouring horizontal elevation of the base surface with a level gauge, mark it at a place that can be controlled, and evenly apply the interface agent.
Generally, the width of the construction face shall not exceed 2m.
The construction time of gypsum based self leveling floor material can be adjusted by appropriate additives to meet the construction requirements.
If the base course is too wet or there are pores similar to crater after the first painting, it shall be painted for the second time.
After the interface agent is applied, the indoor ventilation shall be maintained to facilitate the drying of the interface agent.
(4) Construction precautions.
After the powder is added and stirred evenly, it can be used after standing for 3 ~ 5min.
② Interface processing.
During construction, the clean water required for each bag of self leveling powder shall be weighed according to the given amount of water added, and the self leveling dry powder shall be slowly poured into the mixing bucket containing clean water.
(2) Preparation of slurry.
For the part without automatic leveling, the toothed scraper can be used to clear and pour the foam and appropriate paving to assist in leveling.
During construction in summer, direct sunlight on the ground shall be avoided; The once mixed slurry must be used up before the initial setting.
At ordinary times, the flow speed must be uniform and the connection must be smooth.
The slurry after the initial setting must not be diluted with water, otherwise it will produce cracking, pulverization, no strength, delamination and so on.
The flatness of the base course shall be accepted with a level gauge and a 2m guiding rule, and the flatness of the base course shall not be greater than 3mm.
(3) Curing.
If there is any infringement, please contact us in time.
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Click the “blue word” at the arrow to pay attention to us!! Gypsum based self leveling mortar belongs to the field of special mortar, and its construction technology is particularly important, which is related to the exertion of its performance and the quality of the project.
Source: from the gypsum building materials network statement: the official account is based on the principle of “sharing and respecting originality”.
In addition, gypsum based self leveling floor materials can also be constructed mechanically, supplied from material warehouse, connected with pneumatic conveying equipment, and mechanical mixing and conveying pipeline are used, which are mainly used for leveling treatment of large-area ground.
The mixed self leveling gypsum slurry must be poured into the construction area immediately and evenly, and flow out to the ground from inside to outside.
The above manual construction is mainly used for small-area indoor ground leveling.
Then roll back the mortar surface with a needle roller to eliminate bubbles in the mortar.
No one is allowed to get on within 24h after the completion of gypsum based self leveling mortar; After the completion of gypsum based self leveling mortar, indoor ventilation and moisture drainage shall be appropriate; However, it is necessary to avoid draught, which will dry the ground too fast and produce dry cracks; It is forbidden to wet the ground with open water during curing.
We will delete it within 24 hours.
Pour the mixed slurry immediately, pour it to the required thickness at one time, spread it with a trowel or special tooth needle scraper, roll it with an air release roller, and scrape off small bubbles on the surface at the same time.
Measure the elevation and thickness of the self leveling floor materials to be constructed with a level gauge or polyethylene transparent hose, and mark the elevation of the base course with elevation screws.
During slurry dumping, it must be noted that each dumped slurry must be dumped onto the last slurry, and there shall be no gap with the last dumped slurry.
Pour gypsum based self leveling mortar into a mixing bucket with a certain amount of water, mix it with a portable mixer for 2 ~ 3min, stand still for 3min, and mix it again for 2min to the required consistency.
Under normal circumstances, it can be painted once.
Note that there shall be no material mass in the evenly stirred slurry.
Gypsum based self leveling mortar shall be protected from moisture during transportation and storage.
Manual construction procedure of gypsum based self leveling mortar (1) elevation control and interface treatment ① elevation control.
The specific construction application rules are: (1) base treatment.
The construction section can be separated by foam rubber strip, and the line should be positioned before sticking the foam rubber strip.
(2) Construction of self leveling gypsum leveling layer: before construction, construction joints shall be set according to the width of the working face and site conditions.
The compressive strength of concrete shall be ≥ 20MPa, and the compressive strength of cement mortar shall be ≥ 15MPa.
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Generally, the construction thickness of gypsum based self leveling mortar shall not be less than 4mm.
When mixing self leveling mortar, pay attention not to use too much water, so as not to reduce the strength.
The powder shall be mixed with a mixer while adding the powder.
Brush the supporting interface agent on the base layer for 1 ~ 2 times with a roller or brush.
