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Effect of polypropylene fibers on the fracture behavior of heated ultra-high performance concrete

Ríos, J. D. and Cifuentes, H. and Leiva, C. and Ariza, M. P. and Ortiz, M. (2020) Effect of polypropylene fibers on the fracture behavior of heated ultra-high performance concrete. International Journal of Fracture, 223 (1-2). pp. 173-187. ISSN 0376-9429. doi:10.1007/s10704-019-00407-4.

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In this work we assess the effect of the addition of polypropylene (PP) fibers in a heated ultra-high-performance fiber reinforced concrete (UHPFRC). To this end, three sets of specimens with identical cementitious materials were manufactured: plain concrete, a concrete reinforced exclusively with steel fibers and a concrete reinforced with steel and polypropylene fibers. The mechanical and fracture properties of each concrete at temperatures ranging from room temperature to 300∘C were determined. A thorough appraisal of the thermal effect on the microstructure was also carried out by means of an X-ray scan analysis. Based on the testing data, the relation between the macroscopic response, including mechanical and fracture behavior, and the microscopic structure, i.e., size and number of pores and their distribution, is ascertained. The results show that the addition of PP fibers significantly increases the maximum pore size and slightly increases the total porosity. Furthermore, the partial melting of polypropylene fibers at 300∘C, in combination with the rise in porosity, reduces thermal damage and results in similar behavior at low and high temperatures, room temperature and 300∘C, respectively.

Item Type:Article
Related URLs:
URLURL TypeDescription ReadCube access
Cifuentes, H.0000-0001-6302-418X
Ariza, M. P.0000-0003-0266-0216
Ortiz, M.0000-0001-5877-4824
Additional Information:© 2019 Springer Nature B.V. Received 19 August 2019; Accepted 26 November 2019; First Online 03 December 2019. This research has been funded by the Ministerio de Economía y Competitividad of Spain under grant numbers BIA2016-75431-R and DPI2015-66534-R. The authors declare that they have no conflict of interest.
Funding AgencyGrant Number
Ministerio de Economía, Industria y Competitividad (MINECO)BIA2016-75431-R
Ministerio de Economía, Industria y Competitividad (MINECO)DPI2015-66534-R
Subject Keywords:Ultra-high-performance concrete; Polypropylene fibers; Steel fibers; Thermal damage; Fracture behavior; X-ray computed tomography; Porosity
Issue or Number:1-2
Record Number:CaltechAUTHORS:20191203-154217834
Persistent URL:
Official Citation:Ríos, J.D., Cifuentes, H., Leiva, C. et al. Effect of polypropylene fibers on the fracture behavior of heated ultra-high performance concrete. Int J Fract 223, 173–187 (2020).
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:100171
Deposited By: Tony Diaz
Deposited On:04 Dec 2019 18:04
Last Modified:16 Nov 2021 17:52

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