Examination of Portland cement paste hydrated in the presence of malic acid

Journal Article · Mon Mar 01 00:00:00 EST 2004 · Cement and Concrete Research

DOI:https://doi.org/10.1016/j.cemconres.2003.08.024· OSTI ID:20658345

Rai, Sarita; Chaturvedi, Shivani; Singh, N B

When malic acid (MA) solutions are added to ordinary Portland cement (OPC), rapid heat evolution takes place, but the hydration is retarded considerably at all the MA concentrations. To understand the mechanism of retardation, UV-visible and IR spectral studies were made and the results have revealed that some interaction occurs between MA and certain constituents of OPC. X-ray diffraction (XRD) and thermogravimetric (TG)/differential thermal analysis (DTA) studies have proved the formation of a new reaction product due to interaction between MA and some of the mineral phases of Portland cement. The retardation of the hydration of Portland cement may be attributed to the formation of this new compound.

• OSTI ID: 20658345
• Journal Information: Cement and Concrete Research, Vol. 34, Issue 3; Other Information: DOI: 10.1016/j.cemconres.2003.08.024; PII: S0008884603003041; Copyright (c) 2004 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
DIFFERENTIAL THERMAL ANALYSIS
HEAT
HYDRATION
MALIC ACID
PORTLAND CEMENT
SCANNING ELECTRON MICROSCOPY
THERMAL GRAVIMETRIC ANALYSIS
X-RAY DIFFRACTION