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FDN 是一种以β—萘磺酸甲醛高缩合物钠盐为主要成分的高效减水剂,由武汉冶金建研所与湛江外加剂厂于1978年研制成功,于同年11月通过技术鉴定。到目前已有近十家工厂生产。三年来,仅三个厂约产销 FDN(固体)2000吨以上,应用于建筑、铁道、交通、水工、港口等工程。一、FDN 的基本特性FDN 具有高减水率、非缓凝性、低引气性和早强等效果。同时,还具有耐热性,适用于高压蒸养工艺。
FDN is a high-efficient water-reducing agent consisting mainly of sodium salt of β-naphthalenesulfonic acid-formaldehyde high-condensate. It was successfully developed by Wuhan Metallurgical Institute and Zhanjiang Admixture Factory in 1978 and passed technical appraisal in November of the same year. Up to now, there are nearly ten factories producing. In the past three years, only three plants have produced and sold more than 2,000 tons of FDN (solids), which have been used in construction, railways, transportation, hydraulics, ports and other projects. First, the basic characteristics of FDN FDN has a high rate of water reduction, non-retentive, low air-entraining and early strength and other effects. At the same time, it also has heat resistance and is suitable for high pressure steaming process.