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Estimation of specific surface area of particles based on size distribution curve
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0003-2567-5891
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0002-3997-3083
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0001-6287-2240
2018 (English)In: Magazine of Concrete Research, ISSN 0024-9831, E-ISSN 1751-763X, Vol. 70, no 10, p. 533-540Article in journal (Refereed) Published
Abstract [en]

Workability in the fresh state is one of the most important factors in design and production of concrete and can be related to the water demand of the mixture, which in addition to other factors is a function of the particle shape of aggregates and binders and their specific surface area. While it is known that the shape of fine particles has a significant effect on the water demand, there are uncertainties regarding how the various shape parameters would affect the specific surface area, mainly because up to now many of the shape parameters have not yet been clearly defined and there are no commonly accepted methods for their measurement and/or estimation. In this research, the actual particle shapes were replaced with regular convex polyhedrons to calculate the total specific surface area using the size distribution curves of the samples. The obtained results indicate that while, in some cases, the assumption of a spherical particle shape leads to an acceptable estimation of the specific surface area when compared with Blaine test results, the specific surface area of powders with more angular particles could be calculated more accurately with the assumption of a polyhedron shape rather than a sphere.

Place, publisher, year, edition, pages
London, UK: ICE PUBLISHING , 2018. Vol. 70, no 10, p. 533-540
Keywords [en]
Excess water layer theory, Aggregate shape, Workability, Fresh concrete
National Category
Building Technologies Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-65668DOI: 10.1680/jmacr.17.00045ISI: 000430044700005Scopus ID: 2-s2.0-85045533136OAI: oai:DiVA.org:ltu-65668DiVA, id: diva2:1141710
Projects
Concrete mix design development
Funder
Swedish Research Council
Note

Validerad;2018;Nivå 2;2018-04-16 (rokbeg)

Available from: 2017-09-15 Created: 2017-09-15 Last updated: 2018-05-03Bibliographically approved

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Ghasemi, YahyaMats, EmborgCwirzen, Andrzej

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