Roads and Bridges - Drogi i Mosty
20, 2, 2021, 173-187

Comparison of fracture parameters obtained from modified semi-circular bending (SCB) test

Pavla Vacková Mail
Czech Technical University in Prague, Faculty of Civil Engineering, Department of Road Structures, 7 Thákurova Str., 166 29 Praha 6, Czech Republic
Jan Valentin Mail
Czech Technical University in Prague, Faculty of Civil Engineering, Department of Road Structures, 7 Thákurova Str., 166 29 Praha 6, Czech Republic
Published: 2021-06-28

Abstract

For several years the crack propagation test data of asphalt mixtures according to CSN EN 12697-44 have been collected and evaluated at the Czech Technical University in Prague. Over time, the standardised test procedure has been adapted to better suit the conditions and practice typical of the Czech Republic – in terms of test specimen compaction, availability of cutting discs of suitable thickness, diameter of test specimens, loading speed etc. Modifications encompassed some of the test conditions as well as the procedures of data logging and subsequent evaluation of raw data. It has also been gradually established that the strict focus on fracture toughness, assumed by the European standard to be used as the only suitable qualitative parameter, is probably incorrect, or at least ineffective. The characteristics of fracture energy have been introduced and further studied.

Keywords


mineral-asphalt mixtures, low-temperature properties, SCB test, semi-circular bending test, stiffness modulus.

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References


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Comparison of fracture parameters obtained from modified semi-circular bending (SCB) test

  
Vacková, Pavla; Valentin, Jan. Comparison of fracture parameters obtained from modified semi-circular bending (SCB) test. Roads and Bridges - Drogi i Mosty, [S.l.], v. 20, n. 2, p. 173-187, jun. 2021. ISSN 2449-769X. Available at: <>. Date accessed: 28 Jul. 2021. doi:http://dx.doi.org/10.7409/rabdim.021.011.