Thermodynamics and cement science

Journal Article · Fri Jul 15 00:00:00 EDT 2011 · Cement and Concrete Research

DOI:https://doi.org/10.1016/j.cemconres.2011.03.018· OSTI ID:21576912

Damidot, D ^[1]; Lothenbach, B ^[2]; Herfort, D ^[3]; Glasser, F P ^[4]

---

1. Universite Lille Nord de France (France)
2. Empa, Lab. Concrete and Construction Chemistry, Duebendorf (Switzerland)
3. Cementir Holding (Denmark)
4. Chemistry Department, University of Aberdeen, Aberdeen (United Kingdom)

Thermodynamics applied to cement science has proved to be very valuable. One of the most striking findings has been the extent to which the hydrate phases, with one conspicuous exception, achieve equilibrium. The important exception is the persistence of amorphous C-S-H which is metastable with respect to crystalline calcium silicate hydrates. Nevertheless C-S-H can be included in the scope of calculations. As a consequence, from comparison of calculation and experiment, it appears that kinetics is not necessarily an insuperable barrier to engineering the phase composition of a hydrated Portland cement. Also the sensitivity of the mineralogy of the AFm and AFt phase compositions to the presence of calcite and to temperature has been reported. This knowledge gives a powerful incentive to develop links between the mineralogy and engineering properties of hydrated cement paste and, of course, anticipates improvements in its performance leading to decreasing the environmental impacts of cement production.

• OSTI ID: 21576912
• Journal Information: Cement and Concrete Research, Vol. 41, Issue 7; Conference: 13. international congress on the chemistry of cement, Madrid (Spain), 3-8 Jul 2011; Other Information: DOI: 10.1016/j.cemconres.2011.03.018; PII: S0008-8846(11)00094-9; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0008-8846
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
CALCITE
CALCIUM SILICATES
COMPARATIVE EVALUATIONS
ENVIRONMENTAL IMPACTS
EXCEPTIONS
FLY ASH
HYDRATES
KINETICS
MINERALOGY
PORTLAND CEMENT
SENSITIVITY
SOLUBILITY
THERMODYNAMICS
ADMINISTRATIVE PROCEDURES
AEROSOL WASTES
ALKALINE EARTH METAL COMPOUNDS
ASHES
BUILDING MATERIALS
CALCIUM COMPOUNDS
CARBONATE MINERALS
CEMENTS
COMBUSTION PRODUCTS
EVALUATION
MATERIALS
MINERALS
OXYGEN COMPOUNDS
RESIDUES
SILICATES
SILICON COMPOUNDS
WASTES