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UNF 水泥减水剂的主要原料是油萘。油萘取自煤焦油,这是焦化厂目前尚未得到合理使用的副产品,来源丰富,价格便宜。天津市滤清器厂等单位于1976年共同研制成功了 UNF 减水剂,在建筑工程中试用收到了良好的效果。试验表明:在水泥净浆中掺入0.5～0.7%的 UNF,可使其流动度由原来的13左右,增加到20以上;在混凝土中掺入0.5～0.7%的 uNF,可使塌落度有大幅度的增强。这两项指标说明 UNF 可以大幅度地改善混凝土的和易性,减少混凝土用水量。同时,UNF 对混
The main raw material of UNF cement water reducer is naphthalene. Naphthanaphthalene is derived from coal tar, which is a by-product of coking plants that has not yet been reasonably used. It is rich in sources and cheap. Tianjin Filter Factory and other units jointly developed the UNF water-reducing agent in 1976, which has received good results in trials in construction projects. Tests have shown that adding 0.5% to 0.7% of UNF to the cement paste can increase the fluidity from about 13 to more than 20, and adding 0.5% to 0.7% of uNF to the concrete can make the slump. There is a substantial increase. These two indicators show that UNF can significantly improve concrete workability and reduce concrete water consumption. At the same time, UNF is mixed