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9. Proportioning SCC based on aggregate characteristics



Title: 9. Proportioning SCC based on aggregate characteristics
Author(s): E.P. Koehler, D.W. Fowler
Paper category : conference
Book title: 5th International RILEM Symposium on Self-Compacting Concrete
Editor(s): G. De Schutter and V. Boel
Print-ISBN: 978-2-35158-047-9
e-ISBN: 978-2-35158-088-2
Publisher: RILEM Publications SARL
Publication year: 2007
Pages: 67 - 72
Total Pages: 6
Nb references: 4
Language: English


Abstract: This paper presents specific guidelines for selecting favorable aggregates for use in selfconsolidating concrete (SCC) and for proportioning SCC for any given set of aggregates. The guidelines are based on a laboratory study conducted at the International Center for Aggregates Research (ICAR) at the University of Texas at Austin on the role of aggregates in SCC. This study included 12 fine aggregates, 7 coarse aggregates, and a range of cementitious materials and admixtures. The results of the study indicated that SCC can be successfully proportioned to accommodate a wide range of aggregate characteristics; however, SCC can be improved significantly in terms of both economy and hardened properties by selecting favorable aggregate characteristics. To proportion SCC, a three-step process is suggested: select aggregates, select paste volume, and select paste composition.
Aggregates are selected on the basis of maximum size, grading, and shape characteristics. For a given application, the paste volume is selected based on the aggregates and the paste composition is selected based on the aggregates and paste volume.


Online publication: 2009-06-16
Publication type : full_text
Public price (Euros): 0.00