Issue 60

M. Vyhlídal et alii, Frattura ed Integrità Strutturale, 60 (2022) 13-29; DOI: 10.3221/IGF-ESIS.60.02

Focused on IGF26 - 26th International Conference on Fracture and Structural Integrity

Effect of petrographic composition and chemistry of aggregate on the local and general fracture response of cementitious composites

M. Vyhlídal, I. Rozsypalová, H. Šimonová, B. Kucharczyková, P. Rovnaníková, Z. Keršner Brno University of Technology, Faculty of Civil Engineering, Veve ř í 331/95, 602 00 Brno, Czech Republic

Michal.Vyhlidal@vutbr.cz, https://orcid.org/0000-0002-8035-6781 rozsypalova.i@fce.vutbr.cz, http://orcid.org/0000-0003-3109-3820 simonova.h@vutbr.cz, http://orcid.org/0000-0003-1537-6388

barbara.kucharczykova@vutbr.cz, http://orcid.org/0000-0002-7123-5099 rovnanikova.p@fce.vutbr.cz, http://orcid.org/0000-0002-6732-788X kersner.z@fce.vutbr.cz, http://orcid.org/0000-0003-4724-6166 L. Vavro, M. Vavro Czech Academy of Sciences, Institute of Geonics, Studentská 1768, 708 00 Ostrava-Poruba, Czech Republic leona.vavro@ugn.cas.cz, http://orcid.org/0000-0002-4830-8691 martin.vavro@ugn.cas.cz, http://orcid.org/0000-0003-1446-460X J. N ě me č ek Czech Technical University in Prague, Faculty of Civil Engineering, Department of Mechanics, Thákurova 7, 166 29 Prague, Czech Republic jiri.nemecek@fsv.cvut.cz, http://orcid.org/0000-0002-3565-8182

A BSTRACT . This paper concerns the results of research into the influence of the composition of rock inclusions on the fracture response of cement-based composite specimens. Specially designed specimens of the nominal dimensions 40 × 40 × 160 mm with inclusions in the shape of prisms with nominal dimensions of 8 × 8 × 40 mm were provided with an initial central edge notch with a depth of 12 mm. These specimens, which were made of fine-grained cement-based composite with different types of rock inclusion – amphibolite, basalt, granite, and marble – were tested in the three-point bending configuration. Fracture surfaces were examined via scanning electron microscopy and local response in the vicinity of rock inclusions was characterized via the nanoindentation technique. The aim of this paper is to analyse the influence of the chemical/petrographic composition of rock inclusions on the effective mechanical fracture parameters of cement-based composites, as well as on the microstructural mechanical parameters of the interfacial transition zone. The results of this research indicate the significant dependence of the effective fracture parameters on the petrographic and related chemical composition of the rock inclusions.

Citation: Vyhlídal, M., Rozsypalová, I., Šimonová, H., Kucharczyková, B., Vavro, L., Vavro, M., N ě me č ek, J., Rovnaníková, P., Keršner, Z. Influence of rock inclusion composition on the fracture response of cement-based composite specimens, Frattura ed Integrità Strutturale, 60 (2022) 13-29.

Received: 30.10.2021 Accepted: 17.01.2022 Online first: 22.01.2022 Published: 01.04.2022

Copyright: © 2022 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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