The invention provides a
grinding aid composition for improving the
grinding efficiency of superfine
cement, which comprises the following components in percentage by
mass:
silicate ester prehydrolysate (30-45% of alkoxy
silane, 40-55% of
alcohol solvent and 5-10% of acid catalyst), a surface adsorbent (8-12% of
triethanolamine or
triisopropanolamine), a dispersion stabilizer (2-4% of polycarboxylic acid
ether with molecular weight of 2000-5000), and the balance of water. And an optional
adjuvant (1-3% of
acetylacetone). The preparation method comprises a pre-
hydrolysis stage and a compounding stage. During application, the surface adsorbent and
cement are premixed, then prehydrolysate is added for common
grinding, and the dispersion stabilizer is added in stages. According to the composition, the grinding
energy consumption is reduced by 20-30%, the
particle aggregation index (CI value) is reduced to below 0.35, the specific surface area of
cement reaches 500-800m < 2 > / kg, the
compressive strength in 3 days is improved by 20-35%, the
compressive strength in 28 days is improved by 10-15%, and the composition is economical and efficient.