Study on the Generating Mechanism of the Separation of Building Finishing Materials and Establishment of Separation Preventing Technology

本研究的目的是为了阐明钢筋混凝土建筑和木结构建筑层合组合物中的分离产生机理，并从实验和数值分析两方面验证并提出有效的防止分离技术。(1)通过有限元分析阐明，当环境温度快速下降时，饰面砂浆与混凝土之间容易发生分离。(2)通过水渗透到砂浆与混凝土的界面，特别是在饰面砂浆变形的部分。 (3)在雨浸可能性较大的倾斜外墙，明确了防止水渗入砂浆与混凝土界面的重要性。(4)在20℃左右的环境下施工时，结果表明，混凝土养护期至少3天以上，可保持较高的质量。在10℃左右的环境中，清楚地表明了抗力在阳光照射和喷水的情况下，固化时间为10天以上，可以保持较高的粘合强度。(5)在30℃左右的环境下，可以接受由于阳光照射和喷水而导致的粘合强度下降的趋势。表明在本实验的范围内，在炎热季节的环境中，希望确保养护时间为14天以上。

The purpose of this study is to clarify the separation generating mechanism in the laminated composites of reinforced concrete building and wooden building, and it carried out in order to verify and propose effective separation prevention technology from both sides of an experiment and numerical analysis.(1) It was clarified by FEM analysis that the separation between the finishing mortar and concrete is easy to occur when ambient temperature falls rapidly.(2)By permeation of the water to the interface of mortar and concrete, especially at the part that a deformation of finish mortar is restrained, adhesive strength really leads to decrease d.(3) At the slanting outer wall with the high possibility of the flood by rain, it was clarified that it is so important to prevent the permeation of water into the interface of mortar and concrete.(4) When constructing in about 20-degree Centigrade environment, it was shown that the curing period of concrete can maintain comparatively high quality at least three days.In about 10-degree Centigrade environment, it was shown clearly that the resistance over sun shine and a water spray can be kept high by curing period on the 10 days or more.(5)In about 30-degree Centigrade environment, the tendency that the adhesive strength decreased by sun shine and water spray was accepted. In the range of this experiment, it was shown in the environment the hot season that it is desirable to secure a curing period 14 days or more.