Effect of tire cords, steel and polypropylene fiber content on the fatigue response of cement-based mortars

0583596 - ÚFM 2025 RIV CH eng C - Konferenční příspěvek (zahraniční konf.)
Domski, J. - Gancarz, M. - Benešová, A. - Šimonová, H. - Seitl, Stanislav - Frantík, P. - Keršner, Z.
Effect of tire cords, steel and polypropylene fiber content on the fatigue response of cement-based mortars.
Advances in Science and Technology. Vol. 145. Zurich: Trans Tech Publications Ltd, Switzerland, 2024, s. 77-86. ISSN 1662-0356.
[NTCC 2023 - International Conference Non-Traditional Cement & Concrete /7./. Brno (CZ), 25.06.2023-28.06.2023]
Grant CEP: GA ČR GA21-08772S; GA MŠMT(CZ) 8J22AT008
Institucionální podpora: RVO:68081723
Klíčová slova: Cement-based composite * fiber * tire cord * steel * polypropylene * compressive test
Obor OECD: Civil engineering

The subject of the study presented in this paper is to quantify the effect of fiber content on
the mechanical and mainly fatigue response of fine-grained cement-based mortars. The reference
cement-based composite was without fibers. Three types of fibers were used as dispersed
reinforcement: tire cords (waste material), steel, and polypropylene. For each type of fiber, mixtures
with varying reinforcement levels per volume were prepared: 0.0 % (reference composite), 0.5 %,
1.0 %, and 1.5 %. Prismatic specimens 40 mm × 40 mm × 160 mm were prepared and tested. A total
of 10 composite variants were investigated. The ages of the specimens for the static three-point
bending tests were 28 days, for the compression tests were 28, 120, and 275 days. While for the
fatigue tests, it was approximately between 110 and 180 days. The obtained compressive strength
values for the above-mentioned composite ages were approximated by a selected exponential function
and the results of the fatigue tests were standardized to a nominal age of 28 days using them. All used
types of reinforcement increase the strength values of the mortars even from the lowest fiber doses.
A positive effect of fiber dosage above 0.5 % on the fatigue behavior of mortars was shown only in
the case of reinforcement with commercial steel fibers.
Trvalý link: https://hdl.handle.net/11104/0352711