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一、混凝土早强剂 混凝土早强剂应用较为广泛。到目前为止,在素混凝土中氯盐仍是国内使用最为普遍的早强剂;在钢筋混凝土中以三乙醇胺与食盐复合剂和硫酸钠应用较为普遍。 氯盐可使混凝土拌合物的凝结时间和水化热提前;早期强度提高(而后期极限强度有可能稍有减少);早期抗冻融能力提高(而后期将会有所降低),干缩将有一定的增大。现将氯化钙对水泥混凝土的早强效能列于表1[1]。
First, concrete early strength agent Concrete early strength agent application is more extensive. So far, the chlorine salt in plain concrete is still the most common early strength agent used in China; it is more common to use triethanolamine and common salt complex agent and sodium sulfate in reinforced concrete. Chlorine salt can advance the setting time and heat of hydration of concrete mixes; early strength increases (and there may be a slight decrease in later ultimate strength); early freeze-thaw resistance increases (and later will be reduced), shrinkage There will be a certain increase. The early strength performance of calcium chloride on cement concrete is listed in Table 1 [1].