The ground condition is closely related to the quality of the floor project. The base surface treatment is an important part of the epoxy floor project. Detailed inspection and folding of construction base surface is very important to determine the treatment method of construction base surface, which relates to whether the coating layer can firmly adhere to the ground and whether the coating layer is smooth and bright. In order to ensure that the bonding between the coating and construction base surface is durable, it requires that the base surface be dry, firm and clean, without any. Residues and other pollutants. The bonding strength of the epoxy mortar and the ground will vary greatly depending on the surface condition of the floor.
These differences are mainly manifested in the following aspects: surface roughening treatment can significantly improve the bond strength; at the same time, the higher the moisture content of concrete, the lower the bond strength. In order to do well the base surface treatment, the compressive strength must be measured first. The compressive strength of industrial floors should not be less than 25N/mm2 (3500psi). In order to meet some important requirements, higher strength may be needed. The rebound meter can be used to measure the compressive strength of industrial floors at multiple points, or it is better to take core samples to measure the compressive strength and determine the bonding strength.
The concrete base is usually a low strength layer formed by cement slurry within several millimeter thickness of its surface. The change of temperature or repeated load-bearing will lead to the decrease of bond strength. Therefore, the minimum bond strength should not be less than 1.5N/mm2 (210psi).
The determination of base moisture can not be neglected, because cement base can only be constructed when its humidity is not more than 6%.
When measuring humidity, "rubber pad experiment" can be used to glue at least 1m *1m polyethylene film onto concrete surface with tape and remove it 24 hours later, so as to determine the amount of condensate. Climate environment is also very important, ignoring climate factors can lead to serious defects of the floor, such as insufficient bonding strength, watermarking, voids, irregular surfaces, inadequate hardening. Therefore, the following data must be measured several times a day in construction: ambient temperature (temperature), temperature of construction base, dew point. Finally, preparation and cleaning will affect the bonding performance of the finished floor if the pollution caused by grease, oil or organic/inorganic acid/cement surface is not completely removed. Therefore, the surface must be mechanically cleaned up to a solid inner layer and checked by measuring the bonding strength.
标签:   环氧地坪 环氧地坪施工 环氧地坪漆 环氧地坪翻新 地坪