Load-deformation behavior of hybrid elements of PCC and CC under flexural stress

Author(s): A. Flohr, A. Dimmig-Osburg
Paper category: Conference
Book title: Concrete Repair, Rehabilitation and Retrofitting III (ICCRRR)
Editor(s): M.G. Alexander, H.-D. Beushausen, F. Dehn, P. Moyo
Print ISBN: 978-0-415-89952-9
Publisher: Taylor & Francis Group
Pages: 490- 491
Total Pages: 2
Language: English

Abstract: 
Alongside many advantages, PCC (Polymer-modified Cement Concrete) also has some drawbacks. Compared to CC (cement concrete) the advantages of PCC are the improvement of workability, adhesive bonding and elasticity, as well as the increasing of flexural and tensile strength, ductility and not least of durability. Drawbacks are the increased viscous and plastic deformation under loading, the decrease of degree of hydration and the lower compressive strength. One solution to be able to use the advantages of PCCs to their full capacity and to compensate for the drawbacks is the use of hybrid elements of PCC and CC. Initial tests were performed on statically loaded samples to determine the deformation behavior of PCC and of CC. Then load tests were performed on hybrid beam elements, which consisted of a 70 mm layer of CC cast wet-in-wet on a 30 mm layer of reinforced PCC. It was found that the load-deformation behavior of the hybrid elements differs significantly from that of the reference samples made solely of CC, and can be regarded as favorable. An increase of flexural strength as well as an increase of the initial crack load could be observed on the hybrid elements. The crack distribution was similar on both samples, with reduced crack widths on the hybrid element beams. By applying PCC to the tensile zone of flexural loaded concrete beams, the deflection is increased.

Online publication: 2014
Publication Type: abstract_only
Public price (Euros): 0.00