The effect of short carbon fibers on rheological behaviour and mechanical properties of metakaolin-slag geopolymer binder

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F19%3A43957680" target="_blank" >RIV/49777513:23640/19:43957680 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1088/1757-899X/613/1/012050" target="_blank" >http://dx.doi.org/10.1088/1757-899X/613/1/012050</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1757-899X/613/1/012050" target="_blank" >10.1088/1757-899X/613/1/012050</a>

Result language

angličtina

Original language name

The effect of short carbon fibers on rheological behaviour and mechanical properties of metakaolin-slag geopolymer binder

Original language description

This study investigates the effects of short carbon fibers addition on rheological behaviour of geopolymer binder and final mechanical strength of prepared composite. The pure geopolymer binder and variously carbon fiber reinforced composites were tested. The pure geopolymer binder was synthesized by alkalination of calcined claystone powder and milledblast furnace slag by potassium silicate solution. The binders reinforced by carbon fibers were prepared under the same conditions. Mixtures were accordingly reinforced by 20 wt% of short and milled fibers, respectively. The effect of fibers length (3 mm and ≤ 0.5 mm) was studied with regard to rheological behaviour of prepared mixtures and mechanical properties of final composites. The rheological properties were determined in accordance to flow properties by rotational rheometry. The final properties were determined by measurements of flexural strength after 3, 28 and 280 days and by means of optical and scanning electron microscopy. The resultsindicate that milled carbon fibers had a slight effect on flow properties compared to pure binder. In contrast, 3 mm long carbon fibers significantly increased viscosity and noticeably decreased workability by interlocking mechanism of individual fibers. Moreover, it was proved that addition of milled fibers had a low reinforcement effect on composite samples and led only to slight improvement of stress-strain behaviour. On the contrary, the reinforcement by 3 mm carbon fibers improved the stress-strain properties and significantly increase ultimate flexural strength (approximately 5 times) compared to pure geopolymer binder in all studied time intervals.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Project

<a href="/en/project/LO1402" target="_blank" >LO1402: CENTEM+</a><br>

Continuities

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

Publication year

2019

Confidentiality

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

Article name in the collection

IOP Conference Series: Materials Science and Engineering

ISBN

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ISSN

1757-8981

e-ISSN

1757-899X

Number of pages

5

Pages from-to

"NESTRÁNKOVÁNO"

Publisher name

IOP Publishing Ltd.

Place of publication

Bristol

Event location

Miskolc-Lillafured

Event date

Oct 8, 2019

Type of event by nationality

EUR - Evropská akce

UT code for WoS article

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