Effect of Alkanolamines on the Early-Age Strength and Drying Shrinkage of Internal Curing of Mortars

In this study, the reduction of early-age strength mortar caused by traditional super absorbent polymer (SAP) was solved. Two types alkanolamines (Alkanolamine-A and alkanolamine-B) calcium nitrite were compounded with SAP as components then added into to evaluate effects on drying shrinkage. Results showed that adding two could significantly improve compressive mortar. The addition refine pore cement paste reduce average size, which can be reflected increased improved Among them, composite alkanolamine-A alkanolamine-B excellent performance. Its mechanical properties 129% at day 3 139% 7 compared reference group; reach up 31.8 MPa. size decreased 27.8%, shrinkage smaller group.