助磨剂配方设计及其对水泥性能的影响研究

Formulation Design of Grinding Aids and It's Effect on the Properties of Cement

以助磨剂对粉磨水泥的细度和胶砂强度效果为评价指标，研究了多种助磨剂分子的组合方式及其作用效果。结果表明，三乙醇胺醋酸酯＋三乙醇胺（1：1）是最佳二元组合，核心二元组分＋甘油＋乙二醇＋脂肪族减水剂（10：10：5：2）是最佳多元有机组合，多元有机物＋氯化钠＋硫代硫酸钠＋水（27：15：5：53）是掺量为0．1wt％的最佳有机-无机多元复合助磨剂。该多元复合助磨剂使水泥筛余量降低50％，比表面积增加4％，3d和28d强度分别提高25．5％和15．3％，同时使水泥颗粒向3—32μm范围集中，优化了颗粒级配和细化颗粒，并提高水泥粉体的分散性。

Based on the effect of grinding aids on fineness and mortar strength of cement, and a variety of combinations of grinding aids molecular and their effects are studied. The results showed that the optimal matching of grinding aids components is beneficial to improve the comprehensive efficacy of grinding aids. Triethanolamine-acetic monoester ＋ Triethanolamine （1：1 ） is the best binary-combination and Core binary-combination ＋ Glycerin ＋ Ethylene glycol ＋ Aliphatic superplasticizer （10： 10： 5：2 ） is the inorganic multiple-combination, and Multiple-organics ＋ Sodium chloride ＋ Sodium thiosulfate ＋ Water （27： 15： 5：53） is the best organic-organic multiple-combination composite grinding aids of which the dosage is 0.10wt%. The sieve margin of cement is reduced by 50% and the special surface area of cement is increased by 4%, compressive strength of cement is increased by 25.5% and 15.3% at 3 d and 28 d respectively. The content of 3-32 μm range of cement particle is increased by the composite grinding aids, which the particle size distribution is optimized and particle is refined, and the dispersion degree of cement powder is improved.