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Methodological approaches to 3D pore structure exploration
Stroeven, Piet; Le, L.B. Nghi; He, Huan
2012In Key Engineering Materials, 517, p. 305-314
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Keywords :
(blended) cement; porosimetry; DEM; virtual concrete; robotics
Abstract :
[en] About 6% of global CO2 emissions are due to cement production. Blending of Portland cement with a significant fraction of mineral admixture could therefore be instrumental in reducing such emissions. Use of an admixture of vegetable origin such as rice husk as will additionally contribute to waste management and its incineration produces energy. This paper will stress the importance of properly designing such blends. Preferably gap-graded concepts should be employed, since blending efficiency in terms of strength development is promoted as shown in earlier publications. The paper therefore only briefly covers these aspects. Assessment of this blending concept on durability of cementitious materials constitutes a far more complicated problem. This requires careful porosimetry. Mostly, this problem is approached by MIP or by quantitative image analysis. Both can provide 3D information, although that of MIP is generally significantly biased. Quantitative image analysis is however time-consuming and laborious, and thus expensive. Moreover, it does not provide information on continuity of pores. Present day computer facilities offer therefore a better alternative. When using a proper DEM system, the concrete can be simulated in a realistic way. The paper describes new methods for investigating the pore structure in virtual concrete and presents some data on pure cement and blended cement. Differences will have impact on durability risks.
Disciplines :
Civil engineering
Author, co-author :
Stroeven, Piet;  Delft University of Technology
Le, L.B. Nghi;  Delft University of Technology
He, Huan ;  Université de Liège - ULiège > Département Argenco : Secteur GeMMe > Matériaux de construction non métalliques du génie civil
Language :
English
Title :
Methodological approaches to 3D pore structure exploration
Publication date :
2012
Event name :
13 NOCMAT 2011
Event date :
Sep. 22-24, 2011
Audience :
International
Journal title :
Key Engineering Materials
ISSN :
1013-9826
eISSN :
1662-9795
Publisher :
Trans Tech Publications, Aedermannsdorf, Switzerland
Volume :
517
Pages :
305-314
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 03 November 2011

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