E-modulus evolution and its relation to solids formation of pastes from commercial cements

Journal Article · Sun Jul 15 00:00:00 EDT 2012 · Cement and Concrete Research

DOI:https://doi.org/10.1016/j.cemconres.2012.03.013· OSTI ID:21596971

Maia, Lino ^[1]; Azenha, Miguel ^[2]; Geiker, Mette ^[3]; Figueiras, Joaquim ^[1]

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1. LABEST - Laboratory for the Concrete Technology and Structural Behaviour, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto (Portugal)
2. ISISE - Institute for Sustainability and Innovation in Structural Engineering, Universidade do Minho, Escola de Engenharia, Campus de Azurem, 4800-058 Guimaraes (Portugal)
3. DTU - Department of Civil Engineering, Technical University of Denmark, Brovej, Building 118, DK-2800 Kgs. Lyngby (Denmark)

Models for early age E-modulus evolution of cement pastes are available in the literature, but their validation is limited. This paper provides correlated measurements of early age evolution of E-modulus and hydration of pastes from five commercial cements differing in limestone content. A recently developed methodology allowed continuous monitoring of E-modulus from the time of casting. The methodology is a variant of classic resonant frequency methods, which are based on determination of the first resonant frequency of a composite beam containing the material. The hydration kinetics - and thus the rate of formation of solids - was determined using chemical shrinkage measurements. For the cements studied similar relationships between E-modulus and chemical shrinkage were observed for comparable water-to-binder ratio. For commercial cements it is suggested to model the E-modulus evolution based on the amount of binder reacted, instead of the degree of hydration.

• OSTI ID: 21596971
• Journal Information: Cement and Concrete Research, Vol. 42, Issue 7; Other Information: DOI: 10.1016/j.cemconres.2012.03.013; PII: S0008-8846(12)00066-X; Copyright (c) 2012 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

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
CASTING
CEMENTS
ELASTICITY
EVOLUTION
FILLERS
HYDRATION
LIMESTONE
REACTION KINETICS
SHRINKAGE
VALIDATION
WATER
BUILDING MATERIALS
CARBONATE ROCKS
FABRICATION
HYDROGEN COMPOUNDS
KINETICS
MATERIALS
MECHANICAL PROPERTIES
OXYGEN COMPOUNDS
ROCKS
SEDIMENTARY ROCKS
SOLVATION
TESTING