Analysis of the causes of crusting on the light gypsum mortar floor: The surface of the base layer is not clean, and there is floating ash, slurry film or other dirt. In particular, white ash sticks to the base layer, which affects the bonding between the base layer and the surface layer; the base layer is too dry, and the base layer is not adequately watered and moistened when plastering, resulting in the light gypsum mortar losing water too quickly, with low strength, and bonding with the base layer. Not strong. The dust on the surface of the overly dry base layer is also difficult to remove, which plays a certain role in isolating the light gypsum mortar on the opposite layer.
The base layer is too smooth; there is water in the base layer, which causes the water-cement ratio of the cement lightweight gypsum mortar to increase, affecting the strength of the cement lightweight gypsum mortar and the bonding with the base layer; in order to strengthen the cement lightweight gypsum mortar The bonding force between the mortar and the base layer requires a pure cement slurry bonding layer. If the slurry is applied too early during the operation, the cement slurry applied will have dried and hardened when laying the surface layer. Not only will it not help increase the bonding force, but it will cause An isolation layer.
Preventive measures
Strictly handle the base layer; when applying cement light gypsum mortar, ensure that the base layer is moist. The base layer should be watered and moistened the day before construction; excessively smooth base layers should be roughened Rough handling. Or apply the concrete interface treatment agent and then apply cement light gypsum mortar; during construction, ensure that there is no water on the surface of the base layer; apply pure cement slurry immediately followed by plastering.
Post-processing
1. If a small piece of clear water seeps out from the local surface after construction, the amount is small. If it is discovered early, you can sprinkle some dry cement and yellow sand in an appropriate proportion. The ratio is 1:2 and smoothed; if it is discovered late, after the water evaporates, sprinkle an appropriate amount of dry cement on the surface. After absorbing moisture, first rub it with a wooden trowel, and then use an iron trowel to polish it.
2. If water seeps out in a large area, scoop up the light cement gypsum mortar, add an appropriate amount of dry 1:2 cement and yellow sand, stir evenly, and apply again. The Daji cement light gypsum mortar floor is hollow, cracked, and crusty. As a last resort, you can choose to shovel it off and deal with it again.
Sanding and Ashing Treatment Agent
There is a floor sanding and dusting treatment agent, which is mainly used to treat concrete floors, cement floors, and wear-resistant floors. Gray situation. Including: renovation of old floors, renovation of old walls, renovation of emery wear-resistant floors, ground treatment of various types of industrial warehouses, logistics centers, factories, parking lots and other places with concrete or cement light gypsum mortar as the base to remove sand, The cement floor is damaged, the ground is frozen and cracked, the cement label is not enough, the strength is not enough, the emery wear-resistant floor is sandy and dusty, the color of the emery wear-resistant floor is reflected and faded, the cement floor is cracked, the fine stone concrete is sandy and dusty , Cracks appear on the factory floor, the cement falls off, the cement floor bubbles after being polished, the cement light gypsum mortar surface layer is hollowed out (bubbling), the cement floor peels and becomes gray, the cement floor is dusty and is not strong, and the ground strength is relatively low Poor, large area of cracks on the cement floor after leveling, uneven ground, numerous cracks on the ground, white cement color, loose and not solid, cement concrete surface peeling, ground dust or pits, cement hard shell peeling off, exposing loose Repair and deal with problems such as cement and sand, cracked floor slab joints, hollow cement floors, damaged, burnt and frozen cement floors.
Detailed construction steps
1. First clean the ground completely, clean up the dust on the ground, and try to avoid leaving any dust. If water is used for flushing, it must be done every other day and make sure there is no water accumulation or excessive moisture on the ground.
2. Divide the floor penetrating agent into a proportion of 1:1 and stir evenly. Instructions for use: Use a roller brush to apply directly on the cement floor. Repeat the application twice with an interval of 3 hours. It should be noted here that severe local sanding requires re-brushing. The number and amount of re-brushing are determined according to the on-site conditions. For places with serious material detachment or rapid penetration, material must be replenished in time to ensure that Its penetration and infiltration. Generally, places with high surface density seep less, and places with low surface density seep more. These should be handled differently during construction. The key points are: first pass: roll coating, second pass: roll coating.
3. Maintenance: The floor penetrant can be used 24 hours after the construction is completed.
4. Repairs for damaged floors: Some floors are uneven due to previous damage and repairs, peeling off and eradication, or unevenness caused by other reasons that need to be repaired. Yes, wait until the above process is completed before processing. </p
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