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ŠIMONOVÁ, H. KUCHARCZYKOVÁ, B. LIPOWCZAN, M. LEHKÝ, D. BÍLEK, V. KOCÁB, D.
Originální název
Identification of Mechanical Fracture Parameters of Alkali-activated Slag Based Composites During Specimens Ageing
Typ
článek v časopise - ostatní, Jost
Jazyk
angličtina
Originální abstrakt
The aim of the paper is to present the results of the experiment focused on the development of the mechanical fracture characteristics of alkali-activated slag (AAS) based composites within the time interval from 3 days to 2 years of ageing. Two AAS composites, which differed only in the presence of shrinkage reducing admixture (SRA), were prepared for the purpose of experiments. The composites were prepared using ground granulated blast furnace slag activated by water-glass with silicate modulus of 2.0, standardized quartzite sand with the particle grain size distribution of 0−2 mm, and water. Commercially produced SRA was added into the second mixture in an amount of 2 % by weight of slag. The test specimens were not protected from drying during the whole time interval and were stored in the laboratory at an ambient temperature of 21 ± 2 °C and relative humidity of 60 ± 10 %. The prism specimens made of above-mentioned composites with nominal dimensions of 40 × 40 × 160 mm with the initial central edge notch were subjected to the fracture tests in three-point bending configuration. The load F and displacement d (deflection in the middle of the span length) were continuously recorded during the fracture tests. The obtained F−d diagrams and specimen dimensions were used as input data for identification of parameters via the inverse analysis based on the artificial neural network, which aim is to transfer the fracture test response data to the desired material parameters. In this paper, the modulus of elasticity, tensile strength, and fracture energy values were identified and subsequently compared with values obtained based on the fracture test evaluation using the effective crack model and work-of-fracture method.
Klíčová slova
Fracture test, Inverse analysis, Artificial neural network, Effective crack model, Work-of-fracture method, Slag, Alkali activation
Autoři
ŠIMONOVÁ, H.; KUCHARCZYKOVÁ, B.; LIPOWCZAN, M.; LEHKÝ, D.; BÍLEK, V.; KOCÁB, D.
Vydáno
31. 12. 2019
Nakladatel
VSB - Technical University of Ostrava, Faculty of Civil Engineering
Místo
Ostrava
ISSN
1213-1962
Periodikum
Sborník vědeckých prací Vysoké školy báňské – Technické univerzity Ostrava
Ročník
19
Číslo
2
Stát
Česká republika
Strany od
59
Strany do
64
Strany počet
6
URL
http://tces.vsb.cz/Home/ArticleDetail/488
BibTex
@article{BUT160635, author="Hana {Šimonová} and Barbara {Kucharczyková} and Martin {Lipowczan} and David {Lehký} and Vlastimil {Bílek} and Dalibor {Kocáb}", title="Identification of Mechanical Fracture Parameters of Alkali-activated Slag Based Composites During Specimens Ageing", journal="Sborník vědeckých prací Vysoké školy báňské – Technické univerzity Ostrava", year="2019", volume="19", number="2", pages="59--64", doi="10.35181/tces-2019-0021", issn="1213-1962", url="http://tces.vsb.cz/Home/ArticleDetail/488" }