Liquid cement grinding aid

Abstract

The invention relates to a liquid cement grinding aid which can obviously reduce the dosage of trolamine and does not contain urea. The grinding aid comprises the following compositions in weight percentage: 1 to 10 percent of trolamine, 5 to 10 percent of diglycol, 1 to 10 percent of trimeric sodium phosphate, 10 to 30 percent of molasses, 0 to 20 percent of sodium thiosulfate, 0 to 10 percent of air entraining component and the balance being water, wherein the air entraining compositions are triterpenoid saponin air entraining agent, sodium lignin sulfonate or a mixture of the triterpenoid saponin air entraining agent and the sodium lignin sulfonate at any proportion. The invention obviously reduces the dosage of the trolamine, does not contain the urea, lowers product cost and simultaneously facilitates the environmental protection. The sodium thiosulfate has the function of exciting mixed materials of cement and can improve the initial strength and the later strength of the cement, thereby effectively improving the service performance of the cement grinding aid. The triterpenoid saponin air entraining agent and the sodium lignin sulfonate have the action of the auxiliary aided grinding and simultaneously properly entrain air to reduce the water consumption of the cement standard consistence.

Description

technical field [0001] The invention relates to a cement grinding aid, in particular to a liquid cement grinding aid. Background technique [0002] At present, domestic cement grinding aid products have two forms: powder and liquid. Because the liquid product is easy to use, the cement plant only needs to add a storage tank and a liquid metering pump, and it can be added smoothly without complicated and heavy equipment, so it is gradually used widely. The formula of liquid cement grinding aid can be basically fixed, and does not need to be changed frequently in order to adapt to the changes of cement and seasons like concrete admixture products. The formula of existing liquid cement grinding aid is mainly composed of amines, ethylene glycol , acetate and other single or compound products. Because these products have less dosage, convenient liquid metering and adding, improve the grinding efficiency of the mill by 10-20%, save power consumption per unit time, improve the fl...

AI Technical Summary

Problems solved by technology

This type of formula has some weaknesses, such as: the price of the main raw material triethanolamine remains high, resulting in high cost of liquid grinding aid products; urea reacts with the alkali after hydration of cement, and releases ammonia gas, which is harmful to civil buildings. The environment is unfavorable; there is no activator to stimulate the activity of the cement mixture to improve the early and late strength of the cement and increase the amount of the mixture, which is beneficial to the energy saving and emission reduction of the cement industry