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混凝土外观质量缺陷一般表现为表面起砂、不光洁、局部磨面、蜂窝、露筋、鱼鳞纹、色彩不一等等。1 混凝土外观色差产生的原因1.1 水泥对外观颜色的影响一般水利工程施工多采用普通硅酸盐水泥,水泥中主要成份有硅酸三钙、硅酸二钙、铝酸三钙、铁铝酸四钙等,还含有少量游离状态的氧化钙、氧化镁、硫酸钙等有害物质。水泥与水及砂、石骨料按混凝土配合比拌制成混凝土后,
Appearance quality defects in concrete appearance of the general surface of the sand, not smooth, local grinding, honeycomb, rib, scale pattern, color and so on. 1 appearance of concrete appearance of color difference 1.1 The impact of cement on the appearance of color General water conservancy construction more common portland cement, cement is the main component of tricalcium silicate, dicalcium silicate, tricalcium aluminate, Calcium, etc., but also contains a small amount of free state of calcium oxide, magnesium oxide, calcium sulfate and other harmful substances. Cement and water and sand, stone aggregate mixed with concrete mix into concrete,