Cement grinding aid and preparation method thereof

Abstract

The invention provides a cement grinding aid and a preparation method thereof. The cement grinding aid is prepared from the following components in percentage by mass: 0.3-3 percent of polycarboxylic acid mother liquor, 1-3 percent of hydroxy propyl cellulose, 6-11 percent of molasses, 14-22 percent of modified diethanolisopropanolamine, 10-18 percent of sodium thiosulfate and the balance of water. The preparation method comprises the following steps: firstly, injecting water into a first pre-dissolution kettle, adding the hydroxy propyl cellulose under stirring, and stirring for 30 minutes to prepare a cellulose solution having a mass percentage of 3 percent for later use; and then, adding the polycarboxylic acid mother liquor and the sodium thiosulfate into the balance of water in a second reaction kettle under stirring according to the prescribed proportion, adding the molasses, the modified diethanolisopropanolamine and the hydroxy propyl cellulose solution, stirring for 20 minutes, filtering impurities by virtue of a stainless steel screen to prepare the cement grinding aid. According to the cement grinding aid, the setting time of cement and concrete can be remarkably improved, and the fluidity of cement paste, cement slump and slump flow can be improved.

Description

technical field [0001] The invention relates to the technical field of cement grinding aids, in particular to a cement grinding aid for improving the applicability of cement and concrete water reducing agents and a preparation method thereof. Background technique [0002] During the production of cement, cement enterprises mostly monitor the production of cement by testing cement strength, setting time, sulfur trioxide and fineness ratio to ensure the quality of cement, but few cement enterprises conduct cement applicability testing when cement leaves the factory. However, for the downstream enterprises of cement enterprises such as concrete mixing stations, in addition to testing the strength of concrete, the most important thing is to pay attention to the applicability of cement and water reducer. Applicability issues such as sulfur. Contents of the invention [0003] In view of this, the present invention aims to propose a cement grinding aid and a preparation method t...

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Problems solved by technology

[0002] During the production of cement, cement enterprises mostly monitor the production of cement by testing cement strength, setting time, sulfur trioxide and fineness ratio to ensure the quality of cement, but few cement enterprises conduct cement applicability testing when cement leaves the factory. However, for the downstream enterprises of cement enterprises such as concrete mixing stations, in addition to testing the strength of concrete, the most important thing is to pay attention to the applicability of cement and water reducer. Applicability issues such as sulfur

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