Strength and crack resistance of cement composites under multilevel reinforcement
https://doi.org/10.29235/1561-8323-2023-67-4-340-344
Abstract
The working hypothesis is confirmed that the required fracture toughness of structural concrete can be provided by multi-level reinforcement: at the level of the crystalline joint of cement stone – carbon nanotubes, and at the level of fine-grained concrete – various macro-sized fiber fibers (steel, polymer). Reinforcement of a crystalline splice with carbon nanotubes leads to an increase in tensile strength by 20 %, an increase in Young’s modulus. With dispersed reinforcement of concrete modified with nanoparticles at the level of fine-grained concrete, the tensile strength increases by 109 %, the critical stress intensity coefficient (crack resistance index) increases by 280 % at normal separation, and by 48 % at transverse shear.
About the Authors
S. A. Zhdanok
Advanced Research and Technologies
Belarus
Belarus
Zhdanok Siarhei A. – Academician, D. Sc. (Physics and Mathematics), Professor, Chief Researcher. Advanced Research and Technologies (
Sovkhoznaya Str., 1-16, 223058, Leskovka village, Minsk district
S. N. Leonovich
Belarusian National Technical University;
Qingdao University of Technology
Belarus
Belarus
Leonovich Siarhei N. – D. Sc. (Engineering), Professor, Head of the Department. Belarusian National Technical University
65, Nezavisimosti Ave., 220013, Minsk
E. A. Sadovskaya
Belarusian National Technical University
Belarus
Belarus
Sadovskaya Elena A. – Head of the Department
65, Nezavisimosti Ave., 220013, Minsk
E. N. Polonina
Belarusian National Technical University
Belarus
Belarus
Polonina Elena N. – Senior Lecturer
65, Nezavisimosti Ave., 220013, Minsk
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