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国家标准《混凝土外加剂》GB 8076—2008及上海市工程建设规范《预拌混凝土生产技术规程》DG/TJ 08—227—2009实施后,原先在中低标号混凝土中普遍使用的木质素磺酸盐减水剂由于其减水率小、混凝土抗压强度比低等弱点,很难满足该标准的要求。为此,利用聚羧酸减水剂及木质素减水剂为主要原料,通过复配,研制出一种新的聚羧酸-木质素复合型外加剂。该外加剂具有低成本、高减水率、工艺简单、质量易控制、成本合理以及减少环境污染的特点,可广泛应用于工业与民用建筑、水利、道路交通、核电工程等领域。
After the implementation of the national standard “Concrete admixture” GB 8076-2008 and Shanghai Construction Code “Technical Specification for Ready Mixed Concrete Production” DG / TJ 08-227-2009, the lignosulfonic acid originally used in middle and low grade concrete Salt water reducer due to its small water reduction, concrete compressive strength than the weaknesses, it is difficult to meet the standards. To this end, the use of polycarboxylate superplasticizer and lignin superplasticizer as the main raw material, through the compound, developed a new polycarboxylate - lignin complex additive. The admixture has the characteristics of low cost, high water reduction rate, simple process, easy quality control, reasonable cost and reduction of environmental pollution. The admixture can be widely applied in the fields of industrial and civil buildings, water conservancy, road traffic and nuclear power engineering.