Fyzika AdMaS

The Effect of Specimen Size on Acoustic Emission Parameters and Approximate Position of Defects Obtained during Destructive Testing of Cementitious and Alkali-Activated Degraded Fine-Grained Materials

Topolář, Libor; Kocáb, Dalibor; Hrubý, Petr; Jakubka, Luboš; Hoduláková, Michaela; Halamová, Romana (MDPI, 2023-05-04)

Two sizes of test samples were selected to investigate the effect of size on the level of degradation. The smaller test specimens had dimensions of 40 × 40 × 160 mm, and the larger ones had dimensions of 100 × 100 × 400 ...
Classification of Thermally Degraded Concrete by Acoustic Resonance Method and Image Analysis via Machine Learning

Dvořák, Richard; Chobola, Zdeněk; Plšková, Iveta; Hela, Rudolf; Bodnárová, Lenka (MDPI, 2023-01-22)

The study of the resistance of plain concrete to high temperatures is a current topic across the field of civil engineering diagnostics. It is a type of damage that affects all components in a complex way, and there are ...
Acoustic non-destructive testing of high temperature degraded concrete with comparison of acoustic impedance

Dvořák, Richard; Chobola, Zdeněk; Kusák, Ivo (MATEC Web of Conferences, 2018-10-30)

The paper is focused on non-destructive measurement of high temperature degraded concrete test specimens of three mixtures different by the use of coarse aggregate. Testing is done by ultrasonicpulse velocitymethod and ...