We all know that the cement floor has the property of thermal expansion and cold contraction. After the cement floor is poured, the expansion joint must be cut. Epoxy floor paint has the characteristics of seamless as a whole. Before the construction of epoxy floor paint, expansion joints need to be treated, but if the expansion joints are not properly treated, there will be hidden dangers. The hidden danger of improper treatment of expansion joints in floor paint construction: expansion joints are usually cut out. When cutting, a lot of mud will enter expansion joints. After cutting, expansion joints will be basically filled up. Some will be filled with asphalt or other elastic materials in order to make expansion joints free of garbage and sundries.如果沥青或其他填充料未能去除，施工时环氧地坪材料的溶剂就会对沥青或其他填料进行溶解，这些沥青或填料就会吸收环氧地坪材料里的溶剂，等到环氧地坪施工完成以后，一旦遇到高温天气，伸缩缝里含有溶剂的沥青或填料，溶剂就会加剧释放，随气温的升高，慢慢导致伸缩缝的全面膨胀，顶脱地面涂层，是涂层开裂，开裂后的地面涂层边缘会随天气蔓延扩大，最终对环氧地坪造成破坏，影响环氧地坪的美观和正常使用。
If asphalt or other fillers can not be removed, the solvent of epoxy floor material will dissolve asphalt or other fillers during construction. These asphalt or fillers will absorb the solvent in the floor material. When the epoxy floor construction is completed, once high temperature weather occurs, the solvent in expansion joint will be released more rapidly, and slowly with the increase of temperature. Slow expansion of expansion joints leads to the cracking of the coating. The edge of the cracked coating will expand with the spread of weather, eventually causing damage to the epoxy floor, affecting the beauty and normal use of the epoxy floor.
Processing method of expansion joint in floor paint construction:
1. If there is only expansion joint of mud, before making epoxy floor paint, the mud in expansion joint should be cleaned up, penetrated and cured with epoxy primer, then filled with rigid material like epoxy resin mortar into expansion joint, and then constructed according to the construction technology of epoxy floor paint.2、如果伸缩缝内有沥青或其他填充物料，环氧地坪漆施工前，也必须去除沥青或其他填充物料，用环氧树脂底漆封固，用环氧砂浆进行填补至平整后再进行环氧地坪施工。
2. If there is asphalt or other filling material in expansion joint, asphalt or other filling material must be removed before construction of epoxy floor paint, sealed with epoxy resin primer, and filled with epoxy mortar until leveling before construction of epoxy floor paint.
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