During the construction of concrete foundation, due to various reasons, concrete strength often fails to meet the standards, which seriously affects the use of the ground and greatly shortens the service life of the concrete ground. And the concrete base surface whose strength is not up to the standard will also cause hidden danger to the laying and use of epoxy floor paint, and directly affect the wear resistance coefficient and compressive strength of epoxy floor paint.
Testing method for strength of concrete base: rebound tester
1. Reasons for insufficient strength of concrete base surface:
1. When the concrete base surface is constructed, it is not vibrated.
2. Concrete proportion imbalance, inaccurate measurement, or the construction of arbitrary water, resulting in a large increase in water cement ratio;
3. The cement used in construction has passed the shelf life or is damped; the cement proportion is improper, the sediment content is large, the impurities are too much, resulting in excessive voids; improper use of admixtures, the amount of admixture is inaccurate.
4. The mixing time of the concrete is not enough, the mixing is not uniform, or the feeding sequence is reversed.
5, winter construction, early demolition of the mold, or early freeze.
6. Improper maintenance of concrete base, no curing agent or water spreading, or no curing days.
Hardened floor of concrete curing agent
Two, prevention and control measures:
1, to ensure cement quality clearance, in the shelf life.
2, strictly control the ratio of sand and gravel, guarantee the mud content, and mix proportion of concrete.
3, prevent the concrete base surface from being frozen early, and prevent freezing before construction.
Three, concrete base surface strength is not enough Governance:
Concrete sealing agent can improve the strength of concrete base 40%. And prevent the concrete base from blowing up during the use of sand.
What is a concrete seal curing agent?
Compounds penetrated into concrete and semi-hydrated cement, free calcium, silica and other substances contained in the condensed concrete undergo a series of complex chemical reactions to produce hard substances. These compounds will eventually make the surface of concrete compactness increased, thereby improving the strength, hardness and resistance of the concrete surface. Wear resistance and impermeability.
How to play a role?
The final product of complex chemical reaction will plug and seal the pore of concrete structure. The increase of strength will bring about the improvement of surface hardness, and the increase of density will bring about the improvement of impermeability. Reducing the path of moisture flow, that is, reducing the invasion of harmful substances, thus greatly enhancing the corrosion resistance of concrete to chemical substances. Therefore, the concrete surface sealant solidifying agent can bring long-term sealing, strong, wear-resistant, dust-free concrete surface.
标签:   环氧地坪 地坪 环氧地坪施工 环氧地坪漆