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冬季施工时,混凝土中究竟掺加那一种外加剂较好,各地的施工科研单位均做了很多工作,曾对十几类无机盐和有机物、单一的和复合的外加剂进行了大量试验,有不少宝贵经验。根据其效果,总结出抗冻剂有氯化钙、氯化钠、亚硝酸钠等;早强剂有硫酸钠(即芒硝或元明粉)、氯化钙、硫代硫酸钠等;催化剂有三乙醇胺、三异丙醇胺等;阻锈剂有亚硝酸钠等。为了对推广大模板施工创造有利条件,我们通过学习访问,查阅国
In the construction of winter, it is better to add the additive in the concrete. The construction and scientific research units all over the country have done a lot of work. A large number of tests on dozens of inorganic salts and organics, single and complex admixtures were conducted. There is a lot of valuable experience. According to its effect, the anti-freeze agents are summarized as calcium chloride, sodium chloride, and sodium nitrite; the early strength agents include sodium sulfate (ie Glauber’s salt or Yuan Mingfen), calcium chloride, sodium thiosulfate, etc.; there are three catalysts. Ethanolamine, triisopropanolamine, etc.; rust inhibitors include sodium nitrite. In order to create favorable conditions for the promotion of large formwork construction, we will visit the country through study visits.