Water-based epoxy resin: the guardian of concrete base

1. Analysis of the characteristics of water-based epoxy resin
water-based epoxy resin is an environmentally friendly high-performance coating. It uses water as a diluent, which not only reduces pollution to the environment, but also reduces the risk of fire during construction. Its core component, epoxy resin, has excellent chemical stability and mechanical strength, and can form a strong chemical bond with a variety of substrates. When applied to the concrete base, the water-based epoxy resin can penetrate into the tiny pores on the concrete surface to form a dense sealing layer, effectively blocking the intrusion of harmful substances such as moisture and chloride ions, while enhancing the hardness and flatness of the concrete surface, laying a solid foundation for subsequent coatings.

2. The key role of adhesion
Adhesion is an important indicator to measure the bonding strength between the coating and the substrate, which is directly related to the overall performance and life of the coating system. The strong adhesion between water-based epoxy resin and concrete base surface is mainly due to the following points:

Chemical anchoring effect: The active groups in the epoxy resin molecules can react chemically with calcium ions, hydroxides, etc. in concrete to form chemical bonds, thereby achieving physical and chemical dual anchoring.
Micropore filling effect: Waterborne epoxy resin can penetrate and fill the tiny pores on the surface of concrete, increase the contact area between the coating and the base surface, and improve the mechanical bite force.
Wettability and compatibility: Good wettability ensures that the primer can evenly cover the concrete surface, while the specific formula design ensures compatibility with different concrete components and reduces interface defects.
III. Practical significance of improving the stability and durability of the coating system
In practical applications, this characteristic of water-based epoxy resin has a far-reaching impact on ensuring the stability and durability of the entire coating system:

Enhance the coating bonding: As the first line of defense of the coating system, the strong adhesion provides a solid foundation for the subsequent intermediate paint and topcoat, effectively avoiding problems such as coating stratification and shedding.
Prevent coating cracking: Good base surface sealing and reinforcement reduces coating stress concentration caused by water absorption, expansion and contraction of the substrate, thereby preventing coating cracking.
Extend service life: By improving the overall protective performance of the coating system, it effectively resists environmental erosion, significantly extends the service life of infrastructure and buildings, and reduces maintenance costs.
Environmental protection and economy: The use of water-based epoxy resin is in line with the trend of green development. At the same time, due to its excellent performance, it reduces repeated construction caused by coating failure and has good economy.