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Effect of petrographic composition and chemistry of aggregate on the local and general fracture response of cementitious composites
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SYSNO ASEP 0556249 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Effect of petrographic composition and chemistry of aggregate on the local and general fracture response of cementitious composites Author(s) Vyhlídal, M. (CZ)
Rozsypalová, I. (CZ)
Šimonová, H. (CZ)
Kucharczyková, B. (CZ)
Rovnaníková, P. (CZ)
Keršner, Z. (CZ)
Vavro, Leona (UGN-S) RID
Vavro, Martin (UGN-S) RID, ORCID
Němeček, J. (CZ)Number of authors 9 Source Title Frattura ed Integrita Strutturale. - : Gruppo Italiano Frattura - ISSN 1971-8993
Roč. 16, č. 60 (2022), s. 13-29Number of pages 17 s. Publication form Online - E Language eng - English Country IT - Italy Keywords cement-based composite ; force-displacement diagram ; fracture test ; inclusion ; mechanical fracture parameters ; rocks Subject RIV JN - Civil Engineering OECD category Civil engineering Method of publishing Open access Institutional support UGN-S - RVO:68145535 UT WOS 000783296100002 EID SCOPUS 85129580954 DOI 10.3221/IGF-ESIS.60.02 Annotation 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. Workplace Institute of Geonics Contact Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Year of Publishing 2023 Electronic address https://www.fracturae.com/index.php/fis/article/view/3321/3461
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