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An experimental laboratory study of fiber-reinforced asphalt mortars with polyolefin-aramid and polyacrylonitrile fibers


Abstract: Promising results have been found in the literature through use of synthetic fibers in hot mix asphalt. However, few research works have focused on studying the effect of these fibers at asphalt mortar scale. In this research, the reinforcing effect of polyolefin-aramid (POA) fibers and polyacrylonitrile (PAN) fibers is investigated in asphalt mortars through indirect tensile testing. Fiber-Reinforced Asphalt Mortar (FRAM) specimens were prepared with different fiber contents (0.1 wt%, 0.2 wt% and 0.3 wt%) and tested at three temperatures (15 °C, 0 °C, ?15 °C). Indirect tensile strength, fracture energy, post-cracking energy and toughness were the parameters obtained and analyzed from the test in order to understand the behavior of the different FRAM designs. Moreover, the failure types obtained were also analyzed. According to the experimental results, a significant improvement of strength at low temperature (?15 °C) was observed when adding 0.3% of POA or PAN fibers. Furthermore, the fracture energy properties were enhanced due to the addition of fibers.



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 Fuente: Construction and Building Materials Volume 248, 10 July 2020, 118622

Editorial: Elsevier Ltd

 Fecha de publicación: 01/07/2020

Nº de páginas: 13

Tipo de publicación: Artículo de Revista

DOI: 10.1016/j.conbuildmat.2020.118622

ISSN: 0950-0618,1879-0526

Url de la publicación: https://doi.org/10.1016/j.conbuildmat.2020.118622

Autores/as

CARLOS JOSE SLEBI ACEVEDO
BUENO, MOISES