Beyond the Floor Cycle: Integral Casting of Walls and Floor Slabs through Double-Shutter Formwork and Self-Compacting Concrete

Author(s): Domenico Cecini, Alessandro Palmeri, Simon Austin
Paper category: Conference
Book Title: 8th International RILEM Symposium on Self-Compacting Concrete - SCC 2016
Editor: Kamal H. Khayat
ISBN: 978-2-35158-156-8
e-ISBN: 978-2-35158-157-5
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 511-521
Total Pages: 11
Language: English

Abstract: A novel in-situ casting method based on Self-Compacting Concrete (SCC) is presented for the erection of split-level concrete buildings. The ability of SCC to flow and fill complex volumes is exploited by using a fully enclosed double-shutter formwork that forms a floor slab monolithically with the supporting and overlooking vertical members. The top surface of the slab is formed by a down-facing shutter as opposed to being an exposed free surface. Such an integral-cast arrangement enables an optimised construction sequence, which in turn reduces the number of casting stages and hence the number of construction joints. The approach is particularly suitable for split-level buildings, which do not lend themselves to a traditional casting sequence based on floor cycles. The integral cast of such offset floors allows a more efficient scheduling of the casting sequence. The technical feasibility of the proposed method was investigated with two large-scale casting trials. SCC was placed through a conveying hose kept in a fixed position at the bottom of the wall at one end of the slab; the rising hydraulic head at this end pushed concrete through the slab double shutter filling the opposite wall from the bottom. Concrete cores verified that this casting method does not lead to segregation and is not detrimental in terms of homogeneity of strength and anticipated durability.

Online publication: 2016
Publication Type: full_text
Public price (Euros): 0.00