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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. Lulea university of technology. (Construction materials)
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.
2017 (English)In: Magazine of Concrete Research, ISSN 0024-9831, E-ISSN 1751-763X, Vol. 69, no 20, 1-8 p.Article in journal, Editorial material (Refereed) Published
Abstract [en]

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

Place, publisher, year, edition, pages
London, UK: ICE publishing , 2017. Vol. 69, no 20, 1-8 p.
Keyword [en]
Excess water layer theory, Aggregate shape, Workability, Fresh concrete
National Category
Building Technologies
Research subject
Construction Engineering and Management
Identifiers
URN: urn:nbn:se:ltu:diva-65668DOI: 10.1680/jmacr.17.00045OAI: oai:DiVA.org:ltu-65668DiVA: diva2:1141710
Projects
Concrete mix design development
Funder
Swedish Research Council
Available from: 2017-09-15 Created: 2017-09-15 Last updated: 2017-09-15

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