What causes whitening on wear-resistant metal abrasive flooring?
Release Time:
2015-08-06
Source:
What causes whitening on wear-resistant metal abrasive flooring?
Why does a wear-resistant garnet-sand floor turn white after it is completed? The cause can be traced to the following two aspects:
Reasons related to the materials:
1. Differences in pore size within the material lead to flaking; moreover, the materials used in hydrated wear-resistant flooring are prone to chemical reactions under conditions of high air humidity, resulting in surface pulverization.
2. The abrasive floor coating using garnet abrasive is made of a wear-resistant sand material whose main components are high-grade special cement and wear-resistant garnet abrasive. River sand or any sand containing soil must not be used, and the cement grade must be no lower than C25. If the above material specifications are not met, “… ” may occur during construction. The phenomenon of “peeling off the skin.”
Construction-related reasons:
1. Because wear-resistant flooring is not suitable for construction in cold and humid environments, construction must be expedited during winter and spring. To meet tight deadlines, early-strength admixtures are often added during the installation of wear-resistant flooring; while these admixtures can enhance early strength, they can also easily lead to efflorescence and surface flaking on cement floors. This phenomenon results in poor bonding between the cement and the metal aggregates in the wear-resistant floor.
2. Some construction personnel may begin sprinkling and spreading the diamond-sand wear-resistant material before the concrete has fully set, which can also lead to the phenomenon of “peeling” in the wear-resistant floor. If the diamond-sand wear-resistant material is applied only after the concrete floor has already hardened, it will inevitably result in quality problems with the flooring project. This is because the wear-resistant floor If the material fails to bond with the concrete floor within a reasonable timeframe, subsequent application of the flooring material will likely result in delamination and blistering.
Measures to prevent peeling and whitening of silicon carbide wear-resistant flooring:
1. To reduce capillary porosity, optimize the mix proportions and appropriately increase the compactness of the cement-based material.
2. The cement grade shall be not less than C25, and the quartz sand aggregate must not be mixed with river sand or silt.
3. Do not use cement with very high alkalinity;
4. Avoid construction in cold, damp environments whenever possible;
5. Construction procedures must be precise; it is best to hire experienced construction personnel.
