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Application of Triisopropanolamine in grinding aids

Views:6     Author:Site Editor     Publish Time: 2020-01-09      Origin:Site Inquire

In the field of cement grinding aids, the early alcohol amine compounds used in grinding aids were mainly triethanolamine. Because triisopropanolamine  has better dispersibility and later strength than triethanolamine, with the development of the cement industry and intensified competition, the application of triisopropanolamine in cement grinding aids has developed rapidly.


The application of triisopropanolamine in cement grinding aids is manifested in that the cement grinding aid contains triisopropanolamine, triethanolamine, additives and water.


According to the requirements of the formula, triisopropanolamine is added with a certain proportion of water, and then other raw materials are added and stirred at normal temperature and pressure in the kettle until the product specifications are qualified and discharged. There are two ways to add:


One is that triisopropanolamine is added directly during cement grinding. When the temperature is low (<10 ° C), triisopropanolamine with a content of 85% is difficult to transport due to its high viscosity. Therefore, it must be diluted with water to 65% to 70% before adding, and pumped. The best addition is about one ten thousandth of the total raw materials. The second is the direct addition of triisopropanolamine in concrete production. Triisopropanolamine and superplasticizer are used in a mixture of about 0.1% of cement, and the amount of superplasticizer is about 0.8% of cement (mainly excited strength).


With the increase of the amount of triisopropanolamine, the strength will gradually increase, but because of its increased dispersion, the increase in strength is hindered. When the amount of air entrainment exceeds 3%, the strength begins to decrease with the increase of air entrainment. At this time, a certain amount of block polymer (about 1/10 of triisopropanolamine, preferably epoxy  can be added. Compound).


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