What points should be paid attention to in epoxy floor construction

Epoxy resin floors are widely used in production workshops, laboratories and other occasions
.

Epoxy resin floor has high cleanliness, wear resistance, corrosion resistance, impact resistance, no joints, solid texture, convenient maintenance, low maintenance cost and good decorative effect
.

The editor of Botai will show you the key points to pay attention to in the construction of epoxy floor
.

1.
Substrate quality 1.
The concrete is required to be flat and dense, and the strength is not lower than C20; if the strength is too poor, it will inevitably affect the compression resistance, impact resistance and durability of the coating
.

2.
The flatness of the ground generally requires that the drop within 2m is not more than 2mm, and it is best to use a trowel to smooth and finish); if the drop is large, the floor coating needs to be thickened to reduce the drop
.

3.
If the ground to be painted is at the bottom layer and the groundwater level is high, the bottom layer of the concrete should be waterproofed to avoid blistering and shelling caused by the vapor pressure formed by the rising groundwater from lifting the floor coating
.

4.
The newly built concrete should be dried for at least 3 weeks, the moisture content should not be higher than 6%, and local rain and ground water should be avoided during the curing and drying process, otherwise it will easily cause the local concrete moisture content to exceed the standard
.

5.
The strength of the fine stone concrete leveling layer on the floor slabs, reinforced concrete beams and other components should not be lower than C20
.

Details, such as around the downspout, at the threshold, etc.
, should be flat, and the edges and corners should be straight
.

6.
For repairing or leveling the damaged concrete surface, fine stone concrete with a strength grade of not less than C20 should be used, and the leveling thickness should not be less than 30mm; if cement mortar is required for leveling, a layer of concrete interface treatment agent should be applied first, and then press Design thickness leveling
.

When the above operations are not suitable for the construction process, resin mortar or polymer cement mortar can be used for leveling
.

7.
The large-area concrete base should cut reasonable expansion joints according to the conditions of the base material and leave them for processing when the floor is painted.
In order to maintain the beauty of the ground, try to hide the expansion joints under the partition.
If not, leave the joints in the epoxy floor construction.
, and then fill the seam with elastic glue
.

2.
Base surface treatment 1.
Use a grinding machine for overall grinding, remove the surface cement laitance or other adhering substances, and grind the surface rough
.

2.
Use a vacuum cleaner to fully vacuum and clean it
.

The edges are treated with key artificial roughening
.

3.
Check the ground.
If there is oil stains, use a detergent to remove oil and clean it; if there is a partially wet ground, it needs to be dried
.

4.
For cracks and small pits, etc.
, use resin mortar to fill up in advance; for expansion joints, use a cutting machine to cut into 0.
5cm × 0.
5cm grooves, and then use flexible epoxy resin mortar for smoothing
.

5.
For the old paint floor, if the old paint layer is not firmly attached, it is necessary to use a ground milling machine to remove the old paint layer as a whole, and the old paint layer below 1mm thickness can be treated with a diamond cutter
.

3.
Coating Environment 1.
The coating environment temperature should be above 10℃
.

Amine curing agent is generally used in floor coating, and the reaction between epoxy group and amine group is very slow below 10 °C, and basically does not react below 5 °C
.

2.
The surface temperature of the substrate should be more than 3°C higher than the dew point of the coating environment
.

If this condition is not met, on the one hand, the surface of the substrate is prone to condensation, resulting in poor adhesion of the subsequent coating film
.

3.
Floor coating requires a clean and dust-free coating environment, and requires a closed environment during maintenance, which also has a great impact on the quality of the project
.

This includes whether there is dust in the construction site, whether the construction site will be exposed to rain,
etc.

Fourth, coating direction 1.
Ordinary epoxy floor, also known as flat-coat epoxy floor, thin-layer epoxy floor, etc.
, is often used in places with low requirements for surface flatness, decoration and cleanliness, such as warehouses , General production workshop,
etc.

If the strength of the substrate is high and the surface treatment is good, the compressive performance is good
.

2.
Epoxy mortar floor has the advantages of high mechanical strength, heavy pressure resistance, wear resistance, insulation, fire resistance, oil resistance, corrosion resistance and so on
.

Commonly used in stations, docks, bridges, airport runways, ice rinks, dam projects, factories and mines and other places
.

3.
Epoxy self-leveling floor, also called flowing floor, epoxy self-leveling mortar floor, etc.
This method is fast in construction, but the material cost is high
.

Epoxy self-leveling floors are usually used in occasions with high requirements for cleanliness, flatness and appearance, such as GMP pharmaceutical workshops, preparation rooms, electronics factories, operating rooms, food production and packaging workshops,
etc.