Self-Leveling Construction Steps
Release Time:
2016-07-11
Source:
Self-Leveling Construction Steps
I. Scope of Construction:
The concrete pouring contractor shall pour the concrete immediately:
1. Remove bleed water and verify that the level has reached the specified elevation.
2. Wear-Resistant Aggregate Construction
3. Application of curing compound (excluding cutting of shrinkage joints in the concrete ground slab)
II. Construction Steps
1. Construction Process
Check for flatness — remove bleed water — apply the first layer of wear-resistant material — machine grinding — apply the second layer of wear-resistant material — machine grinding — machine troweling — apply floor curing compound
2. Construction Steps
a. Check for flatness
Conduct a flatness inspection of the concrete-finished floor using a level, measuring its surface.
Whether the surface flatness meets the requirements. (To be undertaken by the civil engineering contractor.)
b. Remove bleeding
Once the concrete surface has achieved the required flatness, any excess bleed water shall be removed with a rubber hose before initial set.
c. First application of wear-resistant material
During the initial setting of the concrete, after removing the laitance, 60% of the specified dosage of wear-resistant material shall be evenly spread over the concrete surface.
d. Machine polishing
After the wear-resistant material has absorbed a certain amount of moisture, perform at least two passes with a mechanical trowel equipped with a disc attachment.
e. Second application of wear-resistant material
After the first application of the wear-resistant material has cured to a certain degree, a second spreading operation is carried out, using 40% of the specified dosage.
f. Machine polishing
After the second application of the material, allow the wear-resistant material to absorb a certain amount of moisture before performing at least four passes with a mechanical trowel equipped with a disc attachment. The mechanical troweling should be carried out in alternating longitudinal and transverse directions.
g. Machine troweling
Based on the degree of surface hardening, perform at least three passes with a power trowel equipped with a finishing blade. The machine’s travel speed and the angle of the trowel blade should be adjusted according to the surface’s hardening condition, and the passes should be executed in alternating longitudinal and transverse patterns. Final finishing is completed using the power trowel.
h. Apply floor curing agent
Five to six hours after the wear-resistant material floor has been completed (adjust according to climatic conditions), a curing agent shall be applied to the surface. This curing process is intended to prevent rapid evaporation of moisture from the floor surface, ensure stable strength development of the wear-resistant material, and provide protection against minor contamination. The curing period shall be seven days.
3. Precautions for the Construction of Wear-Resistant Materials
a. During the final stages of construction for wear-resistant materials, waterproof paper shoes must be worn when entering the work area.
b. The powder must be applied evenly (60% for the first application and 40% for the second), and after spreading the wear-resistant material, it should be leveled with a straightedge.
c. After manual troweling, no obvious trowel marks shall be visible on edges and corners.
d. The completed area must be free of mechanical knife marks.
e. The joints between blocks must be properly treated, with no defects allowed.
f. The curing agent must be applied evenly.
