Publications

Pro093

FLEXURAL RESPONSE OF PRE-STRESSED VAULTED SLABS CAST WITH SELF-COMPACTING CONCRETE



Author(s): Mohammed Sonebi, Emili G. Taengua, Susan Taylor, Richard Morton, Matilde Flack and Guillaume Miallet
Paper category: Proceeding
Book title: Design, Performance and Use of Self-Consolidating Concrete
Editor(s): Caijun Shi, Zhihua Ou and Kamal Henri Khayat
Print-ISBN: 978-2-35158-143-8
e-ISBN: 978-2-35158-144-5
Publisher: RILEM Publications SARL
Publication year: 2014
Pages: 332-342
Total Pages : 11
Language : English


Abstract: This paper describes the structural behaviour of a vaulted pre-stressed slabs cast with self-compacting concrete (SCC) and tested in flexure. The concrete mix grade C50 were used to cast experimental prestressed 0.2m deep vaulted slabs with 3m and 5m overall length and 1.2m width. The concrete mixes were prepared with cement CEMI, 21% fly ash substitution, and a low water-to-binder ratio of 0.32, which is typical of structural precast concrete construction. The targeted 28-day compressive strength was 50 MPa. The SCC mixes were developed to achieve the necessary bond strengths for prestress transfer at early age while balancing the requirements for adequate workability and durability. Additionally the profile of the slab has been optimised to gain maximum structural efficiency for minimum concrete volume whilst maintaining good demoulding time. For each span, three prestressed vaulted slabs were tested in four point flexural test to determine the load carrying capacity, mode of failure, crack pattern, and load deflection response. The predicted transfer stress and ultimate flexural load values have been compared to the experimental results taking into account measured material properties, friction losses and elastic shortening.


Online publication: 2017
Publication type: full_text
Public price (Euros): 0.00