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

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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 alkaliactivated 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 ofthe 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

Název v anglickém jazyce

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

Popis výsledku anglicky

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 alkaliactivated 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 ofthe 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

Druh

D - Stať ve sborníku

CEP obor

JN - Stavebnictví

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Non-Traditional Cement & Concrete V

ISBN

978-80-214-4867-4

ISSN

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e-ISSN

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Počet stran výsledku

4

Strana od-do

179-182

Název nakladatele

Vysoké učení technické v Brně

Místo vydání

Brno

Místo konání akce

Brno

Datum konání akce

16. 6. 2014

Typ akce podle státní příslušnosti

CST - Celostátní akce

Kód UT WoS článku

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