| Autor: |
Sadovskaya, E. A., Polonina, E. N., Leonovich, S. N., Zhdanok, S. A., Potapov, V. V. |
| Předmět: |
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| Zdroj: |
Journal of Engineering Physics & Thermophysics; Jul2022, Vol. 95 Issue 4, p945-952, 8p |
| Abstrakt: |
Tests were carried out on various nanoconcrete matrices and with different dispersed reinforcement fabric: carbon nanotubes, basalt fiber (polymer, 3 types of steel, and their combinations). It has been established that the value of the stress intensity factor KIIC in the case of normal separation increases most with steel fiber (up to 400%). Polymer fiber exerted the least effect on crack resistance - up to 40%. The influence of dispersed reinforcement on the stress intensity factor in the case of normal separation depends on the type of concrete matrix, on the material of fiber fabric, and on the quantity of the latter. As a result of the tests, the values of KIIC have been obtained for various dispersed-reinforced nanoconcretes, differing in the compressive strengths of the nanoconcrete matrix and in polyreinforcement with dispersed fabric at different structural levels. It has been established that dispersed reinforcement has a significant effect on increasing the crack resistance of the material. Increasing the value of KIIC relative to nonreinforced nanoconcrete was from 74 to 150% with steel wire fiber, from 29 to 129% with steel fiber from sheet, from 14 to 131% with polymer fiber, and from 22 to 124% with polyreinforced material. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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