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Home arrow Engineering arrow Creep Behaviour in Cracked Sections of Fibre Reinforced Concrete: Proceedings of the International RILEM Workshop FRC-CREEP 2016

Influence of Fibre Reinforcement on the Long-Term Behaviour of Cracked Concrete

Aitor Llano-Torre, Samuel Eduardo Arango, Emilio Garcia-Taengua, Jose Rocio Marti-Vargas and Pedro Serna

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 SFRC’s and 2 conventional RCs) based on two basic mix designs. Concretes type I were conceived for structural pre-cast 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 on SFRC specimens may be similar to a conventional RC.

Keywords Creep • Steel fibre reinforced concrete • SFRC • Steel fibres • Long-term Crack opening

A. Llano-Torre (H) • J.R. Marti-Vargas • P. Serna ICITECH Institute for Concrete Science and Technology,

Universitat Politecnica de Valencia, Camino de vera s/n Building 4N,

46022 Valencia, Spain e-mail: This email address is being protected from spam bots, you need Javascript enabled to view it

S.E. Arango

Cementos Argos S.A., Medellin, Colombia E. Garcia-Taengua

School of Civil Engineering, University of Leeds, Leeds LS2 9JT, UK

© RILEM 2017 195

P. Serna et al. (eds.), Creep Behaviour in Cracked Sections of Fibre Reinforced Concrete, RILEM Bookseries 14,

DOI 10.1007/978-94-024-1001-3_16

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