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Microstructure and performance of energetically modified cement (EMC) with high filler content
SINTEF Concrete, Trondheim.
SINTEF Concrete, Trondheim.
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2007 (English)In: Cement & Concrete Composites, ISSN 0958-9465, E-ISSN 1873-393X, Vol. 29, no 7, p. 533-541Article in journal (Refereed) Published
Abstract [en]

Energetically modified cement (EMC) has been produced by high intensive grinding/activation of normal portland caemnet (NPC) together with 20% and 50% quartz sand. EMC concretes were compared to NPC based concrete using the k-factor concept. The k-factor for concrete with w/c = 0.60 - 0.45 was 0.7 - 0.9 for 1 day and 1.1 - 1.3 for 28 days compressive strength. k > 1 for both capillay suction, porosity, vapor diffusion and chloride permeability. For carboantion resistance k was approximately 0.55.Microstructure of EMC paste with 50 % quartz sand and w/c = 0.40 showed that the quartz was extensively ground and formed agglomerates with concrete having a high inner surface. The degree of hydration of the cement in EMC was as high as 71 % after 1 day comparted to 45 % for untreated blend. Refind pore sizr distribution of EMC versus blend means that even for equal hydration at higher ages EMC will perform better.

Place, publisher, year, edition, pages
2007. Vol. 29, no 7, p. 533-541
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-16272DOI: 10.1016/j.cemconcomp.2007.03.004ISI: 000248605300002Scopus ID: 2-s2.0-34250795667Local ID: fe68d4a0-29fd-11dc-b6d3-000ea68e967bOAI: oai:DiVA.org:ltu-16272DiVA, id: diva2:989248
Note
Validerad; 2007; 20070704 (elfgren)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Ronin, VladimirJonasson, Jan-ErikElfgren, Lennart

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