IX INTERNATIONAL CONFERENCE
CONTEMPORARY ACHIEVEMENTS IN
CIVIL ENGINEERING
BOOK OF ABSTRACTS , 2024.y., pp. 17-17
CRITICAL VOID VOLUME FRACTION OF CONCRETE| |
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| DOI: 10.14415/CACE2024.07 |
| UDC: 539.3/.4:666.972 |
| CC-BY-SA 4.0 license |
| Author : Milašinović, Dragan D.; Bursać, Smilja; Mrđa Bošnjak, Nataša; Čeh, Arpad |
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| | Summary: |
| | The aim of this work is to theoretically and experimentally determine the critical void volume fraction of hardened concretes at the failure using a rheological-dynamic theory. The experiment involved testing the static compression of standard cylindrical samples. Dynamic stress-strain curves were determined by rheological-dynamical analogy (RDA). Changes in dynamic Poisson's ratio, creep coefficient, critical damage variable, modulus of elasticity and strength as a function of porosity are defined by P and S wave velocities. The fracture porosity, also called critical void volume fraction, is related to failure mechanisms of sample. In this paper, failure mechanisms related to axial splitting and shear failure of concrete samples are assumed. |
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| | Keywords: |
| | POROUS HARDENED CONCRETE, VOIDS, RDA, STATIC COMPRESSION, DYNAMIC STRESS-STRAIN CURVES |
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