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ŠIMONOVÁ, H. TOPOLÁŘ, L. ROVNANÍK, P. SCHMID, P. KERŠNER, Z.
Original Title
Crack Initiation of Alkali-activated Slag Based Composites with Graphite Filler
Type
conference paper
Language
English
Original Abstract
The alkali-activated slag is an alternative building material to ordinary Portland cement based materials. This type of material is effective in reducing CO2 emissions and energy consumption. Addition of graphite powder increases its electric conductivity, hence, introducing new functionality to building materials such as self-sensing and self-heating properties. In this study, the effect of graphite filler on the crack initiation of alkali-activated slag composite is investigated. The graphite powder was added in the amount of 5, 10 and 15% with respect to the slag mass. Beam specimens with an initial stress concentrator were tested in three-point bending at the age of 28 days. The load versus crack mouth crack opening displacement (F–CMOD) diagrams were recorded during the fracture tests and subsequently evaluated using the Double-K fracture model. This model allows the quantification of two different levels of crack propagation: initiation, which corresponds to the beginning of stable crack growth, and the level of unstable crack propagation. The course of fracture tests was also monitored by acoustic emission (AE) method.
Keywords
Fracture test, crack initiation, double-K model, alkali-activation, slag, graphite, acoustic emission
Authors
ŠIMONOVÁ, H.; TOPOLÁŘ, L.; ROVNANÍK, P.; SCHMID, P.; KERŠNER, Z.
Released
22. 1. 2018
Publisher
Trans Tech Publications
Location
Switzerland
ISBN
978-3-0357-1096-0
Book
Key Engineering Materials: Non-Traditional Cement and Concrete
1013-9826
Periodical
Key Engineering Materials (print)
Year of study
761
State
Swiss Confederation
Pages from
57
Pages to
60
Pages count
4
BibTex
@inproceedings{BUT141925, author="Hana {Šimonová} and Libor {Topolář} and Pavel {Rovnaník} and Pavel {Schmid} and Zbyněk {Keršner}", title="Crack Initiation of Alkali-activated Slag Based Composites with Graphite Filler ", booktitle="Key Engineering Materials: Non-Traditional Cement and Concrete", year="2018", journal="Key Engineering Materials (print)", volume="761", pages="57--60", publisher="Trans Tech Publications", address="Switzerland", doi="10.4028/www.scientific.net/KEM.761.79", isbn="978-3-0357-1096-0", issn="1013-9826" }