Llano-Torre, A, Arango, S, Garcia-Taengua, E et al. (2 more authors) (2016) Influence of fibre reinforcement on the long-term behaviour of cracked concrete. In: Serna, P, (ed.) FRC-CREEP 2016 International RILEM Workshop on creep behaviour in cracked sections of fibre reinforced concrete. FRC-CREEP 2016 International RILEM Workshop on creep behaviour in cracked sections of fibre reinforced concrete, 09-10 Mar 2016, Valencia, Spain.
Abstract
The influence of fibre reinforcement on the long-term behaviour of cracked concrete is analysed in this work by means of a creep test. Nine concrete mixes were prepared (7 SFRCs and 2 conventional RCs) based on two basic mix designs. Concretes type I were conceived for structural precast applications and concretes type II reproduce a general purpose. Fibre dosages and conventional reinforcements were varied to represent a wide spectrum of post-peak flexural responses. In all cases with fibre reinforcement steel fibres were used. Conventional RC specimens were reinforced with two steel rebars. In addition to the variables of mix design of concrete, there are two significant variables related to the creep test: the pre-crack opening level (CMODpn) and the stress level (Ic) sustained during the test. Creep tests were performed by applying a constant flexural load on notched pre-cracked specimens and controlling crack opening evolution. Some of the specimens developed a sudden increase of crack opening deformations during the creep test. Creep coefficients and Crack Opening Rates were calculated and analysed. Creep coefficients show significant dependence on the analysed variables. The results of this experimental campaign show that creep of SFRC specimens may be similar to a traditional RC.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Editors: |
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Keywords: | creep; fibre reinforced concrete; steel fibres; long-term; crack opening |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 14 Apr 2016 11:23 |
Last Modified: | 28 Feb 2024 09:44 |
Status: | Published |
Identification Number: | 10.1007/978-94-024-1001-3_16 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:96754 |