Study on the hydration and microstructure of Portland cement containing diethanol-isopropanolamine

Journal Article · Thu Jan 15 00:00:00 EST 2015 · Cement and Concrete Research

DOI:https://doi.org/10.1016/J.CEMCONRES.2014.09.002· OSTI ID:22395940

Ma, Suhua; Li, Weifeng; Zhang, Shenbiao; Hu, Yueyang; Shen, Xiaodong

Diethanol-isopropanolamine (DEIPA) is a tertiary alkanolamine used in the formulation of cement grinding-aid additives and concrete early-strength agents. In this research, isothermal calorimetry was used to study the hydration kinetics of Portland cement with DEIPA. A combination of X-ray powder diffraction (XRPD), scanning electron microscopy (SEM), differential scanning calorimetry (DSC)–thermogravimetric (TG) analysis and micro-Raman spectroscopy was used to investigate the phase development in the process of hydration. Mercury intrusion porosimetry was used to study the pore size distribution and porosity. The results indicate that DEIPA promotes the formation of ettringite (AFt) and enhances the second hydration rate of the aluminate and ferrite phases, the transformation of AFt into monosulfoaluminate (AFm) and the formation of microcrystalline portlandite (CH) at early stages. At later stages, DEIPA accelerates the hydration of alite and reduces the pore size and porosity.

• OSTI ID: 22395940
• Journal Information: Cement and Concrete Research, Vol. 67; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0008-8846
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ATOMIC FORCE MICROSCOPY
CALORIMETRY
FERRITE
FERRITES
HYDRATION
KINETICS
MERCURY
MICROSTRUCTURE
POROSITY
PORTLAND CEMENT
RAMAN SPECTROSCOPY
SCANNING ELECTRON MICROSCOPY
THERMAL GRAVIMETRIC ANALYSIS
X-RAY DIFFRACTION