Supplementary cementitious materials

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

DOI:https://doi.org/10.1016/j.cemconres.2010.12.001· OSTI ID:21504012

Lothenbach, Barbara ^[1]; Scrivener, Karen ^[2]; Hooton, R D ^[3]

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1. Empa, Laboratory for Concrete and Construction Chemistry, CH-8600 Duebendorf (Switzerland)
2. EPFL, Laboratory of Construction Materials, CH-1015 Lausanne (Switzerland)
3. University of Toronto, Dept. of Civil Engineering, Toronto, Canada, M5S 1A4 (Canada)

The use of silica rich SCMs influences the amount and kind of hydrates formed and thus the volume, the porosity and finally the durability of these materials. At the levels of substitution normally used, major changes are the lower Ca/Si ratio in the C-S-H phase and consumption of portlandite. Alumina-rich SCMs increase the Al-uptake in C-S-H and the amounts of aluminate containing hydrates. In general the changes in phase assemblages are well captured by thermodynamic modelling, although better knowledge of the C-S-H is needed. At early ages, 'filler' effects lead to an increased reaction of the clinker phases. Reaction of SCMs starts later and is enhanced with pH and temperature. Composition, fineness and the amount of glassy phase play also an important role. Due to the diverse range of SCM used, generic relations between composition, particle size, exposure conditions as temperature or relative humidity become increasingly crucial.

• OSTI ID: 21504012
• Journal Information: Cement and Concrete Research, Vol. 41, Issue 3; Other Information: DOI: 10.1016/j.cemconres.2010.12.001; PII: S0008-8846(10)00263-2; 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

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALUMINATES
ALUMINIUM OXIDES
CEMENTS
FILLERS
HUMIDITY
HYDRATES
PARTICLE SIZE
PH VALUE
POROSITY
SILICA
SIMULATION
THERMODYNAMICS
ALUMINIUM COMPOUNDS
BUILDING MATERIALS
CHALCOGENIDES
MATERIALS
MINERALS
MOISTURE
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
SIZE