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1 概述在混凝土施工中,特别是对于结构物外露部分,不仅要满足强度、几何尺寸及其它相关技术指标的要求,许多工程项目对结构物的表面光洁度提出了具体要求和量化指标。影响结构物表面光洁度的主要表现形式是气泡、麻面和露骨等病害。2 病害产生的原因产生外观病害的原因既有设计方面的原因,也有施工方面的原因;既有物理原因,也有化学原因。1.1 原材料不合格,级配不合理,骨料粒径大小不适当,水泥自身化学成份不适宜,导致表面产生气泡。气泡的形成主要是物理原因。根据集料级配密实原理,如
1 Overview In concrete construction, especially for the exposed parts of structures, not only the requirements of strength, geometry and other relevant technical indicators are met, many projects put forward specific requirements and quantitative indicators on the surface finish of structures. The main manifestations that affect the surface finish of the structure are air bubbles, pockmarks and dew and other diseases. 2 disease causes the appearance of disease causes both the design of the reasons, there are construction reasons; both physical reasons, but also chemical reasons. 1.1 unqualified raw materials, grading unreasonable, aggregate size is not appropriate, the chemical composition of their own cement inappropriate, resulting in surface bubbles. Bubble formation is mainly a physical reason. According to aggregate gradation principle, such as