Influence of mixing speed on the hydration and setting performance of cement paste in the presence of triethanolamine

Abstract

The presence of triethanolamine (TEA) extremely increases the sensitivity of hydration and setting performance of cement paste on mixing speed during sample preparation. The increased mixing speed first prolongs the induction period and then reduces it, but the corresponding setting time was first decreased and then increased. Besides, a greatly accelerated setting phenomenon was found for cement paste prepared at intermediate mixing speed with TEA dosage of 0.2 wt% and the further increased mixing speed can eliminate this abnormal setting performance, which could be caused by the first decreased and then increased dissolution rate of anhydrite along with the increased mixing speed.