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Mechanism for performance of energetically modified cement versus corresponding blended cement
SINTEF Civil & Environmental Engineering, Trondheim.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.ORCID iD: 0000-0002-0560-9355
2005 (English)In: Cement and Concrete Research, ISSN 0008-8846, E-ISSN 1873-3948, Vol. 35, no 2, p. 315-323Article in journal (Refereed) Published
Abstract [en]

The microstructure of cement paste of 50/50 mixes of cement/quartz and cement/fly ash, both ground in a special mill [energetically modified cement (EMC) process] and simply blended, have been studied under sealed curing conditions. The grinding process reduced the size of both cement grains and quartz/fly ash markedly and created flaky agglomerates of high inner surface for the finer particles. EMCs had much higher degree of hydration at 1 day, but similar as blends at 28 days. The pores were much finer for EMC paste due to smaller particles as also reflected in the strength. The morphology of calcium hydroxide in EMC paste appeared more mass like. Pozzolanic reaction was insignificant for quartz in EMC, but increased for fly ash. Thus, improved performance of EMC versus OPC can be explained by increased early hydration and extensive pore size refinement of the hardened binder resulting in reduced permeability and diffusivity for concrete.

Place, publisher, year, edition, pages
2005. Vol. 35, no 2, p. 315-323
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-13284DOI: 10.1016/j.cemconres.2004.05.022ISI: 000227510600015Scopus ID: 2-s2.0-13644283987Local ID: c7b6b870-7010-11db-962b-000ea68e967bOAI: oai:DiVA.org:ltu-13284DiVA, id: diva2:986236
Note
Validerad; 2005; 20061102 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Elfgren, LennartRonin, Vladimir

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