Detail publikace

EFFECT OF CARBON NANOTUBES ON THE MECHANICAL FRACTURE PARAMETERS AND MICROSTRUCTURE OF ALKALI ACTIVATED SLAG MORTARS

ROVNANÍK, P. BAYER, P. TOPOLÁŘ, L. ŠIMONOVÁ, H. SCHMID, P.

Originální název

EFFECT OF CARBON NANOTUBES ON THE MECHANICAL FRACTURE PARAMETERS AND MICROSTRUCTURE OF ALKALI ACTIVATED SLAG MORTARS

Typ

článek v časopise - ostatní, Jost

Jazyk

angličtina

Originální abstrakt

Alkali activated slag has a great potential to be used in practice. The mechanical properties and application possibilities of alkali activated slag composites are very similar to ordinary cement based concrete. However, the major disadvantage of alkali activated slag is an increased shrinkage, which results in microcracking and deterioration of tensile and bending properties. The study investigates the possibility of using carbon nanotubes (CNTs) as nanosized reinforcement to reduce the cracking tendency of alkali activated slag composite. The effect of CNTs was evaluated by means of mechanical fracture tests and microscopic observations. Compressive strength has increased with 0.5% addition of CNTs but higher content of CNTs causes a deterioration of the compressive strength. Modulus of elasticity was also slightly higher in case of the mixture with 0.5% of CNTs. Effective fracture toughness and fracture energy values are in both cases lower than with reference mixture. Therefore, it can be assumed that such amounts of CNTs do not improve fracture parameters of AAS material. The micrographs revealed that CNTs were not able to eliminate the stress caused by a drying shrinkage of AAS matrix and still some cracks can be observed in the matrix.

Klíčová slova

Slag, Alkaline activation, Carbon nanotubes, Microstructure and Fracture parameters

Autoři

ROVNANÍK, P.; BAYER, P.; TOPOLÁŘ, L.; ŠIMONOVÁ, H.; SCHMID, P.

Rok RIV

2014

Vydáno

1. 9. 2014

Nakladatel

eSAT Publishing House Pvt. Ltd., Bangalore, India

Místo

India

ISSN

2321-7308

Periodikum

International Journal of Research in Engineering and Technology

Ročník

3

Číslo

13

Stát

Indická republika

Strany od

52

Strany do

56

Strany počet

5

URL

http://ijret.org/Archive?VI=20140325

BibTex

@article{BUT110689,
  author="Pavel {Rovnaník} and Patrik {Bayer} and Libor {Topolář} and Hana {Šimonová} and Pavel {Schmid}",
  title="EFFECT OF CARBON NANOTUBES ON THE MECHANICAL FRACTURE PARAMETERS AND MICROSTRUCTURE OF ALKALI ACTIVATED SLAG MORTARS",
  journal="International Journal of Research in Engineering and Technology",
  year="2014",
  volume="3",
  number="13",
  pages="52--56",
  issn="2321-7308",
  url="http://ijret.org/Archive?VI=20140325"
}