Detail publikace

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.

Originální název

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

Typ

článek v časopise - ostatní, Jost

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

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

Autoři

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

Vydáno

1. 12. 2021

Nakladatel

The Publishing Office of Czestochowa University of Technology

Místo

Częstochowa, Polsko

ISSN

0526-5916

Periodikum

Zeszyty Naukowe Politechniki Częstochowskiej Budownictwo

Ročník

27

Číslo

01/2021

Stát

Polská republika

Strany od

118

Strany do

140

Strany počet

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#"
}