What are the main factors affecting the bonding performance between self-leveling epoxy flooring and concrete? Here is a detailed answer from Shengdi Floor, an epoxy flooring manufacturer. What are the main factors affecting the bonding performance between self-leveling epoxy flooring and concrete? Through systematic experimental research and analysis, Shengdi flooring of epoxy flooring manufacturer believes that the interface can be improved by suitable rough, dry and solid concrete surface, appropriate epoxy resin material and mix ratio, and reasonable and perfect construction technology measures. The bonding effect.
Self-leveling epoxy floor
1. The reaction heat of EM has a great influence on bond strength.
The curing reaction of EM belongs to exothermic reaction. The amount of exothermic heat and the peak temperature of exothermic reaction have great influence on the properties of the curing system. The peak temperature of exothermic reaction reflects the highest temperature of the curing system due to exothermic reaction in the curing process. The higher the peak temperature is, the more violent the curing reaction is. The shorter the molecular chain of the curing system is, the larger the brittleness of the structure is, and the larger the shrinkage rate is. The main factor affecting curing temperature is curing agent. In the expert experimental study, four curing agents with different Peak Exothermic Temperature of curing reaction were tested and compared, and their shrinkage rate of curing system was tested respectively. It is proved that the choice of curing agent is very important in EM application.
2. The surface humidity of concrete also affects the bond strength.
As a porous material, concrete has high interfacial energy. The capillary and surface of concrete are easy to absorb a large number of water molecules, and form a water film on the surface of concrete, which reduces the interfacial energy of the interface and is not conducive to EM infiltration into concrete and reduces the bonding force. In addition, the water adsorbed on the surface of concrete contains a large amount of Ca (OH) 2, which makes the water alkaline. In alkaline environment, the effective groups of epoxy resin will be destroyed, which will cause the breakage of molecular chains and reduce the bonding force of EM. From the test results, it can be seen that the lower the moisture content of concrete surface, the higher the bond strength of interface - the effect of surface humidity on bond strength: 1.3 bond strength/MPa in water, 2.1 bond strength/MPa in saturated surface, 3.9 in relative humidity (60%) and 5.8 in drying.
Above is our epoxy floor manufacturer Shengdi floor construction team summarized the main factors affecting the bonding performance of self-leveling epoxy floor and concrete.
标签:   环氧地坪 地坪 环氧自流平 混凝土密封固化剂 环氧地坪施工