Slag composite activated grinding aids, and preparation method

Abstract

This invention relates to a method for preparing composite active grinding aid for slag. The composite active grinding aid is composed of: triethanolamine 10-40 wt.%, polycarboxylic acid water reducer 10-40 wt.%, and saturated solution of calcium hydroxide 20-50 wt.%. The method comprises: mixing the raw materials, and activating by magnetization equipment. The composite active grinding aid can improve the fineness and activity of slag, increase grinding efficiency by 10-20%, and increase 3-day strength by 2-3 MPa and 28-day strength by 4-8 MPa. Besides, the composite active grinding aid has such advantages as good grinding effect, low energy consumption and simple production process.

Description

technical field [0001] The invention relates to a slag composite activated grinding aid used in cement production and a preparation method thereof, belonging to the field of grinding additives in the production of cement and cementitious materials. Background technique [0002] Slag is a by-product of pig iron smelting and has high potential activity. The annual output of slag in China is more than 100 million tons. If these slags are not used effectively, it will inevitably cause immeasurable pollution to the environment, and will also cause huge Energy waste. At present, slag is used as a mixture of cement and used to produce slag cement, especially ground slag as a mineral admixture has become one of the essential components for the preparation of high-performance concrete. However, slag has poor grindability and low early strength during use, which restricts the popularization and application of slag. Although prolonging the grinding time can improve the grinding effic...

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Problems solved by technology

At present, most of the grinding aids researched and used at home and abroad are expensive, the source is short, and the grinding aid effect on the slag is not significant, and the performance of the slag has no or little improvement effect, so the general application is limited.