Early age and hardened performance of cement pastes combining mineral additions
Identifiers
Permanent link (URI): http://hdl.handle.net/10017/20703DOI: 10.1617/s11527-012-9944-9
ISSN: 1359-5997
Publisher
Jason Weiss
Date
2013Bibliographic citation
Barluenga, G., Puentes, J., Palomar, I. Early age and hardened performance of cement pastes combining mineral additions. Materials and Structures, 2013, 46(6), 921-941. ISSN 1359-5997
Keywords
Cement paste
Mineral Additions
Early age properties
Monitoring
UPV
Drying shrinkage
Cracking
Project
info:eu-repo/grantAgreement/CAM//S2009%2FMAT-1629/ES/Durabilidad y consevación de geomateriales del patrimonio construido/
CCG-08-UAH/MAT 4038 (Comunidad de Madrid)
PI3-2008-0499 (Ministerio de Ciencia e Innovación)
Document type
info:eu-repo/semantics/article
Version
info:eu-repo/semantics/acceptedVersion
Publisher's version
http://link.springer.com/article/10.1617/s11527-012-9944-9Rights
(c) RILEM 2012
Access rights
info:eu-repo/semantics/openAccess
Abstract
To asses the influence of mineral additions (MA) at early age and on hardened performance of fluid cement based pastes, an experimental program was carried out. The design of the mixtures correspond to paste compositions used in self compacting concretes of moderated strength, as those employed for architectural applications. Two types of fillers (limestone and quartzite) have been used to substitute 50 % of cement in a reference paste, with and without a high range water reducing admixture (HRWRA). Then, three active MA (microsilica, nanosilica and metakaolin) were combined. A physical and mechanical characterization in the hardened state showed that the inclusion of MA to a cement-filler mixture can moderately improve the hardened performance of the pastes. Air and water cured samples were tested in order to evaluate the influence of curing conditions.
At early ages (24 hours), in-situ temperature and ultrasonic pulse velocity (UPV) were monitored on samples with limestone filler, combined with the three active MA, to study the reaction process and microstructure development, respectively. The reaction degree of the samples under study during the first 24 hours was related to the microstructure development. Evaporation, drying shrinkage and cracking at early age were also monitored, considering an air flow of 3 m/s on the exposed sample surface. Some relations were described linking cracking risks at early ages with the chemical and physical phenomena involved at early age microstructure evolution
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