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大气中的二氧化碳能与水泥中的氢氧化钙作用生成碳酸钙,又与水泥的水化产物反应,形成碳酸钙和硅胶、铝胶,这一作用国内已通称“碳化”,实际应称“碳酸化作用”才较确切。一、“谈虎色变”的碳化作用大气中的二氧化碳浓度按体积计算一般是0.03％,工业区受污染的大气中的二氧化碳浓度当然要高些,室内二氧化碳浓度更高,可是一般也不超过0.1％。据了解,近年来国内外频传碳酸气对混凝土耐
Carbon dioxide in the atmosphere can react with calcium hydroxide in cement to produce calcium carbonate, and react with the hydration products of cement to form calcium carbonate, silica gel and aluminum glue. This effect has been known as “carbonization” in the country, and it should be called “carbonic acid”. “Chemical effect” is more accurate. I. Carbonization of “Disguise” The concentration of carbon dioxide in the atmosphere is generally 0.03% by volume. The concentration of carbon dioxide in the polluted atmosphere of the industrial zone is certainly higher, and the concentration of indoor carbon dioxide is higher, but it is generally not more than 0.1%. It is understood that in recent years, frequent transmission of carbon dioxide gas at home and abroad has shown resistance to concrete.