Publication detail

Mechanical fracture and microstructural parameters of alkali-activated materials with a ceramic precursor

LIPOWCZAN, M. ROZSYPALOVÁ, I. BAYER, P. DANĚK, P. LEHKÝ, D. ROVNANÍKOVÁ, P. KERŠNER, Z.

Original Title

Mechanical fracture and microstructural parameters of alkali-activated materials with a ceramic precursor

Type

journal article - other

Language

English

Original Abstract

Four sets of alkali-activated aluminosilicate composites based on ceramic precursors were studied in terms of their characterization by mechanical fracture and microstructural parameters. Composites made with brick dust as a precursor and with alkaline activator variants of differing silicate modulus (Ms = 0.8, 1.0, 1.2, 1.4 and 1.6) were investigated. The filler used with first two sets of composites was quartz sand, while in the case of the other two sets it was brick rubble; precursor particle size range variants: 0÷1 mm and 0÷0.3 mm. The test specimens had nominal dimensions of 40 × 40 × 160 mm and were provided with notches at midspan after 28 days of hardening. The notches extended up to 1/3 of the height of the specimens, which were subjected to three-point bending tests in which force vs. displacement diagrams were recorded. Values were determined for the static modulus of elasticity, effective fracture toughness, effective toughness and specific fracture energy using the Effective Crack Model and the Work-of-Fracture method. At the same time, values were identified for the static modulus of elasticity, tensile strength and specific fracture energy using the inverse method based on a neural network ensemble. The measured and identified parameters are in very good agreement. The silicate modulus, type of filler and refinement of the precursor significantly influenced the mechanical fracture parameters of the composites. The microstructure of composites with a coarser precursor was also described.

Keywords

alkali-activated aluminosilicate; artificial neural network; fracture test; load-displacement diagram; mechanical fracture parameters

Authors

LIPOWCZAN, M.; ROZSYPALOVÁ, I.; BAYER, P.; DANĚK, P.; LEHKÝ, D.; ROVNANÍKOVÁ, P.; KERŠNER, Z.

Released

1. 12. 2021

Publisher

The Publishing Office of Czestochowa University of Technology

Location

Częstochowa, Polsko

ISBN

0526-5916

Periodical

Zeszyty Naukowe Politechniki Częstochowskiej Budownictwo

Year of study

27

Number

01/2021

State

Republic of Poland

Pages from

118

Pages to

140

Pages count

23

URL

http://www.znb.bud.pcz.pl/Mechanical-fracture-and-microstructural-parameters-of-alkali-activated-materials,145239,0,2.html#

BibTex

@article{BUT176206,
  author="Martin {Lipowczan} and Iva {Čairović} and Patrik {Bayer} and Petr {Daněk} and David {Lehký} and Pavla {Rovnaníková} and Zbyněk {Keršner}",
  title="Mechanical fracture and microstructural parameters of alkali-activated materials with a ceramic precursor",
  journal="Zeszyty Naukowe Politechniki Częstochowskiej Budownictwo",
  year="2021",
  volume="27",
  number="01/2021",
  pages="118--140",
  doi="10.17512/znb.2021.1.18",
  issn="0526-5916",
  url="http://www.znb.bud.pcz.pl/Mechanical-fracture-and-microstructural-parameters-of-alkali-activated-materials,145239,0,2.html#"
}