Abstract
The mechanical performance of fibre reinforced concrete presents aspects still under investigation, mostly those regarding the long-term behaviour. Even if creep and shrinkage are two well-known phenomena that characterize concrete, in case of FRCs, and in particular of macro-synthetic Fiber reinforced concretes (MSFRCs), there are no reliable models for predicting their long term-behaviour, because of the interaction between concrete, fibre creep and bond. In addition, temperature is a further variable to control since it affects the material performance.
In this perspective, the present paper shows the experimental results of a large campaign of creep tests performed on macro synthetic fibre reinforced concrete specimens. The material tested had a compressive strength of about 55 MPa and it is reinforced with 8 kg/m3 of polypropylene crimped fibres. The experimental investigation is carried out by performing creep compression tests on cylinders and direct tensile test on notched cylinders. In addition, the tensile behaviour of the single fibre under sustained load is analysed. The tests were conducted in a humidity and temperature controlled chamber. Furthermore, the temperature was increased from 20 °C to 30 °C after a time of 50 days of testing in order to understand how this condition modifies the creep deformations evolution of the material.
The paper shows also the initial calibration of a numerical model based on the Lattice Discrete Particle Model (LDPM) theory. The LDPM is one of the most validated theories able to reflect the actual coarse aggregate distribution of a quasi-brittle material, i.e. concrete. Currently this theory has been extended to include the fibres reinforcement. The aim of the big study presented would be to elaborate a predictive model for the MSFRCs accounting also for concrete and polymers long term behaviour.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Jiràsek, M., Bazant, Z.P.: Inelastic Analysis of Structures. Wiley, Hoboken (2002)
Babafemi, A.J., du Plessis, A., Boshoff, W.P.: Pull-out creep mechanism of synthetic macro fibres under a sustained load. Constr. Build. Mater. 174, 466–473 (2018)
Pujadas, P., Blanco, A., Cavalaro, S., de la Fuente, A., Aguado, A.: The need to consider flexural post-cracking creep behavior of macrosynthetic fiber reinforced concrete. Constr. Build. Mater. 149, 790–800 (2017)
Buratti, N., Mazzotti, C.: Temperature effect on the long term behaviour of macro-synthetic-and-steel–fibre reinforced concrete. In: 8th RILEM International Symposium on Fibre Reinforced Concrete: Challenges and Opportunities (2012)
Buratti, N., Mazzotti, C.: Effects of different types and dosages of fibres on the long-term behaviour of fibre-reinforced self-compacting concrete. In: 8th RILEM International Symposium on Fibre Reinforced Concrete, RILEM PRO88, pp. 715–725 (2012)
Babafemi, A.J.: Tensile creep of cracked macro synthetic fibre reinforced concrete. Stellenbosch University (2015)
Vrijdaghs, R., Di Prisco, M., Vandewalle, L.: Creep of cracked polymer fiber reinforced concrete under sustained tensile loading. In: 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures FraMCoS-9, pp. 1–9 (2016)
Sorelli, L.G., Meda, A., Plizzari, G.A.: Bending and uniaxial tensile tests on concrete reinforced with hybrid steel fibers. J. Mater. Civ. Eng. 17(5), 519–527 (2005)
Buratti, N., Mazzotti, C.: Experimental tests on the long-term behaviour of SFRC and MSFRC in bending and direct tension. In: Proceedings of the 9th Rilem International Symposium on Fiber Reinforced Concrete (BEFIB) (2016)
Cusatis, G., Pelessone, D., Mencarelli, A.: Lattice Discrete Particle Model (LDPM) for failure behavior of concrete. I: theory. Cem. Concr. Compos. 33(9), 881–890 (2011)
Cusatis, G., Mencarelli, A., Pelessone, D., Baylot, J.: Lattice Discrete Particle Model (LDPM) for failure behavior of concrete. II: calibration and validation. Cem. Concr. Compos. 33(9), 891–905 (2011)
Jin, C., Buratti, N., Stacchini, M., Savoia, M., Cusatis, G.: Lattice discrete particle modeling of fiber reinforced concrete: experiments and simulations. Eur. J. Mech. A/Solids 57, 85–107 (2016)
Schauffert, E.A., Cusatis, G., Pelessone, D., O’Daniel, J.L., Baylot, J.T.: Lattice discrete particle model for fiber-reinforced concrete. II: tensile fracture and multiaxial loading behavior. J. Eng. Mech. 138(7), 834–841 (2011)
Abdellatef, M., Boumakis, I., Wan-Wendner, R., Alnaggar, M.: Lattice discrete particle modeling of concrete coupled creep and shrinkage behavior: a comprehensive calibration and validation study. Constr. Build. Mater. 211, 629–645 (2019)
Serna, P., Llano-Torre, A., Cavalaro, S.H.P. (eds.): Creep Behaviour in Cracked Sections of Fibre Reinforced Concrete. RB, vol. 14. Springer, Dordrecht (2017). https://doi.org/10.1007/978-94-024-1001-3
Del Prete, C., Wan-Wendner, R., Buratti, N., Mazzotti, C.: Lattice discrete particle modeling of MSFRC. In: SSCS19 Numerical Modeling Strategies for Sustainable Concrete Structures, pp. 27–36 (2019)
Bažant, P.Z., Xi, J.: Continuous retardation spectrum for solidification theory of concrete creep. J. Eng. Mech. 121(2), 281–288 (1995)
Findley, W.N., Lai, J.S., Onaran, K.: Creep and Relaxation of Nonlinear Viscoelastic Materials (1976)
Sorzia, A.: Modelling of creep and stress relaxation test of a polypropylene microfibre by using fraction-exponential kernel. Model. Simul. Eng. 2016, 1–7 (2016)
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2022 RILEM
About this paper
Cite this paper
Del Prete, C., Boumakis, I., Wan-Wendner, R., Buratti, N., Mazzotti, C. (2022). Creep of Macro Synthetic Fibre Reinforced Concrete: Experimental Results and Numerical Model Calibration. In: Serna, P., Llano-Torre, A., Martí-Vargas, J.R., Navarro-Gregori, J. (eds) Fibre Reinforced Concrete: Improvements and Innovations II. BEFIB 2021. RILEM Bookseries, vol 36. Springer, Cham. https://doi.org/10.1007/978-3-030-83719-8_37
Download citation
DOI: https://doi.org/10.1007/978-3-030-83719-8_37
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-030-83718-1
Online ISBN: 978-3-030-83719-8
eBook Packages: EngineeringEngineering (R0)