Effects of Triisopropanolamine and Triethanolamine on Some Properties of Portland Cement

One of the most interesting topics relevant to Portland cement that has attracted many researchers’ interest is finding the solution for enhancing the strength of Portland cement, especially strength in early age. Using additives for enhancing early strength of Portland cement is regarded as a good solution. In this study, a mixture of trisopropanolamine (TIPA) and triethanolamine (TEA) was added in cement in the range of 0.020-0.035% to investigate the effect of this mixture on the properties of Portland cement. The results showed that the fineness of cement with the combined additive (TIPA + TEA) was higher than that of an individual one (TEA) and that of ordinary cement. With a suitable amount of additive, the consistency increased, the setting time decreased, the strength of cement enhanced when compared with ordinary cement. Compressive strength of cement prepared with a combined additive (0.01% TIPA + 0.02% TEA) at 1 day of age was the highest (with an increase of 24.21%).