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    影响自流平环氧地坪与混凝土粘结性能的主要因素

    2019-07-08 13:31:44 无锡盛发地坪科技有限公司 阅读

    影响自流平环氧地坪与混凝土粘结性能的主要因素有哪些呢?下面就由环氧地坪厂家盛地环氧地坪为您详细解答。影响自流平环氧地坪与混凝土粘结性能有哪些主要因素,环氧地坪厂家盛地环氧地坪通过系统的试验研究和分析认为:适宜粗糙、干燥、坚实的混凝土面、合适的环氧树脂材料与配合比以及合理、完善的施工工艺措施能够提高界面的粘结效果。

    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.

    自流平环氧地坪

    Self-leveling epoxy floor

    1.EM的反应热对粘结强度的影响较大。

    1. The reaction heat of EM has a great influence on bond strength.

    EM的固化反应属于放热反应,反应中放热量的多少和放热的温度峰值高低都会对固化体系的性能产生很大影响,固化反应过程中的放热峰值温度反映了固化体系在固化反应过程中由于反应放热而达到的最高温度。峰值温度愈高固化反应愈剧烈,固化体系的分子链越短结构的脆性越大收缩率越大。影响固化温度的主要因素是固化剂,专家试验研究中通过对4种具有不同固化反应放热峰值温度的固化剂进行试验对比,分别测试它们的固化体系收缩率。证明在EM应用中固化剂的选择至关重要。

    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.混凝土表面湿度对粘结强度也有影响。

    2. The surface humidity of concrete also affects the bond strength.

    混凝土作为多孔性材料表面具有较高的界面能,内部的毛细管和表面极易吸附大量的水分子,并在混凝土的表面形成水膜,降低结合面的界面能、不利于EM对混凝土的浸润、降低粘结力。另外混凝土表面吸附的水中含有大量的Ca(OH)2使水液呈碱性,在碱性环境中环氧树脂的有效基团会受到破坏,并引起分子链的断裂、降低EM的粘结力。从测试结果可以看出,混凝土表面的含水率越低,界面的粘结强度越高——混凝土表面湿度对粘结强度的影响:水中粘结1.3粘结强度/MPa,饱和面干2.1粘结强度/MPa,相对湿度(60%)3.9,干燥5.8。

    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.

    以上就是我们环氧地坪厂家盛地地坪施工团队总结的影响自流平环氧地坪与混凝土粘结性能的主要因素介绍。

    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
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