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山东省淄博市开发区专家楼屋面于1995年6月施工,屋面面积约1000米~2。防水材料选用彩色焦油聚氨酯,涂膜厚度2毫米。施工时因进货渠道不同,底层与面层涂料分别为两家不同生产厂的产品。施工后发现3点质量问题:(1)大面积涂膜呈龟裂状,部分涂膜表面不结膜。(2)整个屋面颜色不均,面层厚度普遍不足。(3)局部(约3%)涂膜有皱折、剥离现象。一、原因分析1.涂膜开裂和表面不结膜这主要与涂膜厚度不足有关。用针刺法检查,涂膜厚度平均小于0.5毫米。由于厚度较薄,面层涂料在初期自然养护(尤其在阳光照射)下,材料
The construction of the expert building of Zibo City Development Zone in Shandong Province was completed in June 1995 with a roof area of approximately 1,000 m2. The waterproof material is colored tar polyurethane and the film thickness is 2mm. During the construction period, due to different purchase channels, the bottom and top coats were products from two different manufacturers. Three quality problems were found after construction: (1) The large-area coating was cracked and some of the coating surface was not conjunctiva. (2) The entire roof is uneven in color, and the thickness of the surface layer is generally insufficient. (3) Local (about 3%) film has wrinkles and peeling. First, the reason analysis 1. The coating cracking and surface non-conjunctival This is mainly related to the lack of coating thickness. With acupuncture inspection, the average film thickness is less than 0.5 mm. Because of the thin thickness, the surface coating is naturally preserved (especially in sunlight) and the material