Hydration mechanisms of ternary Portland cements containing limestone powder and fly ash

Journal Article · Tue Mar 15 00:00:00 EDT 2011 · Cement and Concrete Research

DOI:https://doi.org/10.1016/j.cemconres.2010.11.014· OSTI ID:21490055

Haha, M Ben; Le Saout, G ^[1]; Kjellsen, K O ^[2]; Justnes, H ^[3]; Lothenbach, B ^[1]

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1. EMPA, Swiss Federal Laboratories for Material Science and Technology, Laboratory for Concrete and Construction chemistry, 8600 Duebendorf (Switzerland)
2. NTNU, Department of Structural Engineering, 7491 Trondheim (Norway)
3. SINTEF Building and Infrastructure, 7465 Trondheim (Norway)

The effect of minor additions of limestone powder on the properties of fly ash blended cements was investigated in this study using isothermal calorimetry, thermogravimetry (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM) techniques, and pore solution analysis. The presence of limestone powder led to the formation of hemi- and monocarbonate and to a stabilisation of ettringite compared to the limestone-free cements, where a part of the ettringite converted to monosulphate. Thus, the presence of 5% of limestone led to an increase of the volume of the hydrates, as visible in the increase in chemical shrinkage, and an increase in compressive strength. This effect was amplified for the fly ash/limestone blended cements due to the additional alumina provided by the fly ash reaction.

• OSTI ID: 21490055
• Journal Information: Cement and Concrete Research, Vol. 41, Issue 3; Other Information: DOI: 10.1016/j.cemconres.2010.11.014; PII: S0008-8846(10)00257-7; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0008-8846
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
CALORIMETRY
COMPRESSION STRENGTH
FLY ASH
HYDRATES
HYDRATION
LIMESTONE
PORTLAND CEMENT
POWDERS
SCANNING ELECTRON MICROSCOPY
SHRINKAGE
THERMAL GRAVIMETRIC ANALYSIS
X-RAY DIFFRACTION
AEROSOL WASTES
ALUMINIUM COMPOUNDS
ASHES
BUILDING MATERIALS
CARBONATE ROCKS
CEMENTS
CHALCOGENIDES
CHEMICAL ANALYSIS
COHERENT SCATTERING
COMBUSTION PRODUCTS
DIFFRACTION
ELECTRON MICROSCOPY
GRAVIMETRIC ANALYSIS
MATERIALS
MECHANICAL PROPERTIES
MICROSCOPY
OXIDES
OXYGEN COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
RESIDUES
ROCKS
SCATTERING
SEDIMENTARY ROCKS
SOLVATION
THERMAL ANALYSIS
WASTES