Influence of the cementitious paste composition on the E-modulus and heat of hydration evolutions

Journal Article · Mon Aug 15 00:00:00 EDT 2011 · Cement and Concrete Research

DOI:https://doi.org/10.1016/j.cemconres.2011.03.008· OSTI ID:21576914

Maia, Lino ^[1]; Azenha, Miguel ^[2]; Faria, Rui ^[1]; 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)

E-modulus and heat of hydration are features of cement-based materials that follow a rapid rate of change at early ages. This paper analyses the influence of the composition of cementitious pastes on these features by using two methods: (i) a novel technique for continuously monitoring the E-modulus of cement-based materials, based on evaluating the first resonant frequency of a composite beam containing the material under testing, and (ii) an isothermal calorimeter to determine the released heat of hydration. Seventeen mixes are tested, encompassing pastes with five w/c ratios, as well as different contents of limestone filler, fly ash, silica fume and metakaolin. The results permit the comparison of the E-modulus and heat of hydration sensitivities to mix composition changes, and to check possible relations between these features. This work also helps to establish the technique (i) as a non-destructive method for monitoring the E-modulus evolution in cement-based materials since casting.

• OSTI ID: 21576914
• Journal Information: Cement and Concrete Research, Vol. 41, Issue 8; Other Information: DOI: 10.1016/j.cemconres.2011.03.008; PII: S0008-8846(11)00084-6; 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

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
36 MATERIALS SCIENCE
CALORIMETERS
CALORIMETRY
CASTING
CASTINGS
CEMENTS
FLY ASH
HEAT
HYDRATION
LIMESTONE
MONITORING
SENSITIVITY
SILICA
TESTING
AEROSOL WASTES
ASHES
BUILDING MATERIALS
CARBONATE ROCKS
COMBUSTION PRODUCTS
ENERGY
FABRICATION
MATERIALS
MEASURING INSTRUMENTS
MINERALS
OXIDE MINERALS
RESIDUES
ROCKS
SEDIMENTARY ROCKS
SOLVATION
WASTES