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根据抗震要求,阳台大多做成钢筋混凝土整体挑板。这类板的裂缝多出现在阳台跟部上表面。1.裂缝程度:(1)用放大镜才能看清楚微细裂纹。(2)用目测近看能发现的裂纹。(3)裂缝比较明显,眼观目测就能发现,宽度小于0.3毫米。(4)裂缝明显,宽度超过0.3毫米,但不再扩展。(5)裂缝的宽度、深度还在继续扩展,并产生变形、下坠,直至悬挑部分掉下。2.裂缝形式:(1)直线裂。(2)稍斜裂。(3)通长裂。(4)间断裂。3.裂缝出现时间:(1)混凝土浇捣后和养生期间。(2)拆模后的当时。(3)拆模后施工期间。(4)交付使用后。一、原因分析
According to the seismic requirements, most balconies are made of reinforced concrete as a whole. Cracks in this type of board appear mostly on the upper surface of the balcony heel. 1. Degree of cracks: (1) Micro cracks can be clearly seen with a magnifying glass. (2) Look at the cracks that can be found by visual inspection. (3) The cracks are obvious. The visual observation can find that the width is less than 0.3 mm. (4) Cracks are evident, the width exceeds 0.3 mm, but no longer expands. (5) The width and depth of the cracks continue to expand, and they will deform and fall until the overhang falls. 2. Crack form: (1) Straight crack. (2) slightly oblique. (3) Long cracks. (4) Between breaks. 3. When the cracks occur: (1) After the concrete is poured and during the period of health. (2) At the time of mold removal. (3) During demolishing after construction. (4) After delivery. First, the reason analysis