A Study on the Specifications of Finish Coatings for Exteria Walls Used in Cold Regions

本研究的目的是确定适合寒冷地区使用的外墙饰面涂料的规格。从这一观点出发，对札幌和钏路市的67家从事涂装工作的公司进行了问卷调查，并将调查结果与大约10年前的调查结果进行了比较。在冬季封闭施工现场和使用加热器进行面漆涂装工作已逐渐普及，但也有一些情况下，没有任何固化处理，即使条件似乎非常严峻。另一系列的研究，进行了一些实验的低温对面漆涂层的影响，使用三种不同类型的薄层涂料和五种类型的多层涂料。在它们用作涂层之前，测量每种材料的凝固点和凝固过程后粘度的变化。通过混凝土试件和其它几种材料的试验，测试了材料的干硬性和涂层的抗冻融性能，并在此基础上提出了寒冷地区外墙饰面涂料的技术要求。

This study is aimed to define the proper specifications of finish coatings for exterior walls using in cold regions. From this point of view, questionnaire survey for 67 companies involved in coating work at Sapporo and Kushiro city was made, which results were compared with the ones that were made about ten years ago. Enclosing construction site and using heater for finish coating work in winter season have gradually become popular, however, some cases without any curing treatment are also observed even if the condition seems to be very severe.As for another series of study, some experiments of low temperature effects on the finish coatings were made by using three different types of thin-layer coatings and five types of multilayer coatings. Before they were used as coating layer, freezing point of each material and change in the viscosity after freezing process were measured. The rate of drying and hardening of the materials, and freezing and thawing resistance of coating layers were tested by using concrete specimens or some other specimens coated by these materials.Based on above mentioned studies, we made some proposal about specifications of finish coatings for exteria walls used in cold regions.