Partial replacement of triethanolamine with triisopropanolamine will further improve cement properties
In the field of cement grinding aids, the early alcohol amine compounds used in cement grinding aids are mainly triethanolamine due to triisopropanolamine.
The dispersibility and late strength are superior to triethanolamine, and its market share is expanding. Compared with triethanolamine, triisopropanolamine
The divergence, the enhancement of each age, and the application conditions have the following advantages:
1. Better dispersibility: when used in cement grinding aids, due to the spatial stereostructure of the alkane chain and hydroxyl group of triisopropanolamine,
The dispersibility of triisopropanolamine is better than that of triethanolamine; and dispersibility is an important indicator of cement. In practical applications, triisopropanol
The effect of amine on cement production is better than that of triethanolamine, and the improvement of fluidity of cement is better than that of triethanolamine.
2. Early enhancement performance: Both are early strength agents, but triethanolamine reverses the early coagulation characteristics of cement, thus achieving early strength.
The effect, while triisopropanolamine is achieved by promoting early coagulation properties to achieve early strength. Specifically, triethanolamine promotes aluminate
Early hydration, delaying the hydration of silicate, increasing early strength, but shortening the setting time; triisopropanolamine promotes harder water
The hydration and dispersibility of the ferrite increases the degree of hydration of the cement minerals, thereby increasing early strength.
3. Later enhancement performance: Triethanolamine promotes early strength, while triisopropanolamine promotes hydration of mineral water.
To improve the dispersibility of cement and greatly improve the late strength of cement. Foreign experiments have shown that the late strength can be increased by more than 3 MPa.
Even 5 to 12 megapascals.
4. Stable application performance: The application of triethanolamine has obvious limitations on its dosage. When the dosage exceeds 0.1%, it sometimes produces flashing.
Condensation phenomenon, which affects the coagulation characteristics of cement; the content of triisopropanolamine ranges from 0.001% to 0.2%, and as the amount increases,
Gradually increase the enhancement.