Ground floor empty drum is a common problem encountered in the construction of Nanjing epoxy floor when the original concrete ground is treated. Empty drum phenomenon can not be judged by eyes, but it is easy to overlook. When epoxy floor paint is made, it is also very good from the surface. But because it is a factory workshop, it needs long-term rolling by forklift, cart, heavy machinery and so on. Over a long period of time, the empty drum will break down and fall off, which will seriously affect the service life of epoxy floor.
Reasons for Cracking of Epoxy Floor Drum
1. Time limit of construction period. When the strength of concrete is not up to the standard during the construction, the installation and follow-up works are in a hurry to catch up with the construction period. At the same time, the construction unit does not maintain the ground enough, which causes the surface strength of concrete to be too low.
2. Before concrete construction, the cement slurry of base course is not uniform. The method of spraying cement is used to map the uniform slurry of cement, which affects the adhesion between surface layer and base course.
3. Preparations before construction did not clean up the cement slurry inherited from the concrete and gypsum dropped from the ceiling during the repair stage, which resulted in the decrease of the bonding force with the surface concrete and the appearance of hollowing and cracking after surface construction.
4. During the construction, in order to put the two-way reinforcement on the surface of fine stone concrete, the resistance of the surface layer is reduced, and the cracking of the surface layer is caused by the shrinkage of the concrete.
5. Artificial errors, artificial mixing concrete and concrete mixing measurement have certain errors. The strength of local constant-setting soil does not meet the standard requirements. Because of the insufficient strength, the parking and turning braking of the car in the garage produce greater friction, resulting in sand on the surface, which is larger at the turning of the lane than that of the straight lane. Only then can the lane be damaged and other serious floor problems occur.
Solution to the Cracking of Epoxy Floor Drum
1. Remove all empty drum positions and clean up the ground.
2. Clean up the ground, float ash, crushed sand, slurry and other dirt.
3. Wet the floor with water. 1-2 days before the construction of the surface layer, the grass-roots should be watered and wetted carefully, so that the grass-roots has a clean, wet and rough surface.
4. Floor construction. A few points should be paid attention to during construction:
(1) Controlling the Water-cement Ratio of Cement Mortar
(2) Controlling construction time to prevent premature or late calendering
(3) Pay attention to the control of ground evenness and indoor net height
5. Watering maintenance 24 hours after completion of construction.
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