On the issue of stretchability of fiber-reinforced concrete with polypropylene fiber
https://doi.org/10.21285/2227-2917-2025-2-244-250
EDN: EVGTER
Abstract
The present study is devoted to the issue of comparative assessment of bending resistance of ordinary (fine-grained) and dispersed reinforced concrete. The weak extensibility of concrete causes low crack resistance, which is a determining factor in the limited durability of concrete and reinforced concrete structures operated in adverse conditions. The paper presents the results of experimental studies that make it possible to analyze the structural properties of fiber-reinforced concrete with different levels of their volumetric reinforcement with polypropylene fibers. Experimental test data in the loading mode with a constant deformation rate of 0.05 mm/s are presented. The prototypes were tested for four-point bending at the Instron test facility with automatic recording of deflections in the middle of the span, deformations of the stretched fiber, and the construction of load-deflection and stress-strain diagrams. The technical feasibility of using polypropylene fibers as reinforcing elements in volumes that ensure the compatibility of their deformation with the concrete matrix has been determined. The conducted experimental study made it possible to establish qualitative (in terms of structure) and statistical changes in the deformation of fibrocrete, which significantly increase its ability to perceive tensile deformations.
About the Authors
I. G. Korneeva
Irkutsk National Research Technical University
Russian Federation
Competing Interests:
Russian Federation
Inna G. Korneeva, Cand. Sci. (Eng.), Associate Professor of the Department of Building Production
Author ID: 1246486
83 Lermontov St., Irkutsk 664074
Competing Interests:
The authors declare no conflict of interests.
N. A. Emelyanova
Irkutsk National Research Technical University
Russian Federation
Competing Interests:
Russian Federation
Natalia A. Emelyanova, Senior teacher of the Deparment of Building Production
Author ID: 1292257
83 Lermontov St., Irkutsk 664074
Competing Interests:
The authors declare no conflict of interests.
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Review
For citations:
Korneeva I.G., Emelyanova N.A. On the issue of stretchability of fiber-reinforced concrete with polypropylene fiber. Izvestiya vuzov. Investitsii. Stroitelstvo. Nedvizhimost. 2025;15(2):244-250. (In Russ.) https://doi.org/10.21285/2227-2917-2025-2-244-250. EDN: EVGTER
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