145. Self-consolidating concrete for thin wall casting

Title: 145. Self-consolidating concrete for thin wall casting
Author(s): B.L. Whitcomb, P.D. Kiousis
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: 961 - 966
Total Pages: 6
Nb references: 4
Language: English

Abstract: This study focuses on the development and testing of a high strength SCC mix, developed for thin wall construction. Concrete casting of vertical thin walls requires, a stable, pumpable and highly flowable mix to facilitate placement from the bottom up in narrowly spaced forms and through tight reinforcement. The flowability, stability and passing ability of the mix are tested using the slump flow test, a J-Ring, and a "U-pipe-test". Walls of 75mm thickness, reinforced with one or two steel grid layers, were cast and loaded to failure under one-way and two-way bending conditions. The one-way slabs were built as portal frames and developed plastic hinges first at the centreline and then at a corner, where reinforcement was greater. The two-way slabs were supported simply on all four edges and loaded concentrically. A yield line strength analysis was performed and matched quite closely the experimental capacities found. It has been shown that high capacity vertical walls can be cast reliably using high strength SCC pumped from the bottom.

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