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最近开发了新型的 NF 耐寒剂——它是一种以密胺树脂磺酸盐系高效减水剂,和含氮化合物为主要成分的复合外加剂。现以 NF 为中心和 RILEM 第三次国际会议所推荐的防冻剂、耐寒剂一并概介如下。以谋求低温混凝土施工的合理化,提高经济效益。商品防冻剂、耐寒剂及其性能用波特兰水泥配制的混凝土,使用常用防冻剂、耐寒剂后其强度增长情况分别如表、2。
A new type of NF cold-resistant agent has recently been developed, which is a compound admixture mainly composed of a melamine resin sulfonate superplasticizer and a nitrogen-containing compound. The antifreeze and cold-resistant agents recommended by NF and the third international meeting of RILEM are summarized below. To seek the rationalization of low-temperature concrete construction and improve economic efficiency. Commercial anti-freeze, cold-resistant and performance concrete made of Portland cement, the use of commonly used antifreeze, cold resistance after the strength of its growth are shown in Table 2, the.