Flexural post-cracking creep behaviour of macro-synthetic and steel fiber reinforced concrete

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Abstract

In this paper the post-cracking creep behaviour of FRC beams under flexural load is evaluated in order to determine whether under certain loading conditions plastic fibres may be safely used in the long-term without compromising the serviceability requirements. For that, an experimental program was conducted that involved the testing of 30 beams with dimensions of 150×150×600 mm reinforced either with plastic or steel fibres. The creep test setup consisted in a four-point bending test in previously cracked beams up to crack widths of 0.25, 1.50 and 2.50 mm. The sustained load ranged between 50 and 60% of the cracking load and was applied by means of a lever system. The sustained load was controlled throughout the test with a load cell. The tests were performed under two different environmental conditions during 6 months. Despite the large deformations exhibited by plastic fibres under sustained load over time, their use as reinforcement should not be discarded as long as the effects of creep are considered in the design.

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APA

Pujadas, P., Blanco, A., Cavalaro, S. H. P., de la Fuente, A., & Aguado, A. (2017). Flexural post-cracking creep behaviour of macro-synthetic and steel fiber reinforced concrete. In RILEM Bookseries (Vol. 14, pp. 77–87). Kluwer Academic Publishers. https://doi.org/10.1007/978-94-024-1001-3_7

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