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骨料中含有活性二氧化硅时,它能与水泥或混凝土中的碱性氧化物水解后生成的氢氧化钠和氢氧化钾起化学反应,在骨料表面生成一种复杂的碱——硅酸盐凝胶体。凝胶体吸水时体积会发生膨胀。如果水泥中的含碱量超过0.6%时,则生成的凝胶体吸水膨胀后,可能使水泥产生裂缝。因此碱骨料反应被称为混凝土的癌症。本文针对碱骨料反应的几种常见的类型产生的原因,提出了几种解决方法。
Aggregates containing reactive silica, it can with cement or concrete alkaline hydrolysis of sodium hydroxide and potassium hydroxide generated by chemical reaction, the aggregate surface to generate a complex alkali - silicon Acid gel. The volume of the gel will swell when it absorbs water. If the amount of alkali contained in the cement exceeds 0.6%, the resulting gel will swell and cause cracks in the cement. So alkali aggregate reaction is called cancer of concrete. In this paper, several common solutions to the problem of alkali aggregate reaction have been proposed.