Views: 41 Author: lucky Publish Time: 2019-04-01 Origin: Site Inquire
What are the advantages of triisopropanolamine compared to triethanolamine in cement and cement concrete applications?
In cement concrete applications, triisopropanolamine has the following advantages in terms of dispersibility, age enhancement, and application conditions compared with triethanolamine: 1 Dispersibility is better, when used in cement grinding aids, The fundamental principle of the action of the grinding aid is the dispersibility of the two surfactants. The dispersibility of the triisopropanolamine is better due to the spatial stereostructure of the alkyl chain and the hydroxyl group of the triisopropanolamine. Triethanolamine; and dispersibility is an important indicator of cement. In practical applications, triisopropanolamine is superior to triethanolamine in improving the cement, and the fluidity of cement is better than that of triethanolamine. 2, early enhancement performance, triisopropanolamine and triethanolamine in the cement grinding aid, the role of grinding and impregnation is the difference between the two as a profile active agent. Due to the spatial steric structure of the alkyl chain and hydroxyl group of triisopropanolamine, the difference is better than that of triethanolamine; and the difference is an important indicator of cement. In actual operation, triisopropanolamine is used for cement. The end of production is better than triethanolamine, and it is superior to triethanolamine in improving the cement's activity. Both are early strength agents, but triethanolamine reverses the early coagulation characteristics of cement, thus achieving the effect of early strength. Isopropanolamine is effective by promoting early coagulation properties. Specifically, triethanolamine promotes early hydration of aluminate, delays hydration of silicate, improves early strength, but shortens coagulation time; triisopropanolamine promotes water of ferrite that is harder to hydrate The degree of hydration of the cement minerals is increased and the dispersion is improved. 3. Enhanced performance in the later stage: Triethanolamine mainly promotes early strength, while triisopropanolamine greatly improves the late strength of cement by promoting hydration of refractory minerals and improving the dispersion of cement. The intensity can be increased by more than 3 MPa, or even 5-12 MPa. 4. Stable application performance: The application of triethanolamine has obvious limitations on its dosage. When the dosage exceeds 0.1%, it will sometimes cause flashing phenomenon, which affects the coagulation characteristics of cement; the doping of triisopropanolamine The amount ranges from 0.001% to 0.2%, and as the amount increases, the reinforcing effect is gradually increased. Performance is unchanged. The operation of triethanolamine has a certain limitation on its dosage. When the dosage exceeds 0.1%, the phenomenon of flashing will occur, which will affect the solidification characteristics of cement; and the dosage of triisopropanolamine is 0.001% to 2 When the amount of % increases, it will slowly advance the cement to strengthen the end.