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Fibers 2016, 4(1), 11; doi:10.3390/fib4010011

The Durability and Performance of Short Fibers for a Newly Developed Alkali-Activated Binder

Henrik Funke. Reichenhainer Str. 31/33, Chemnitz 09126, Germany
Sandra Gelbrich. Reichenhainer Str. 31/33, Chemnitz 09126, Germany
Lothar Kroll. ul. Mikołajczyka 5, Opole 45-271, Poland
Author to whom correspondence should be addressed.
Academic Editor: Edith Maeder
Received: 22 December 2015 / Accepted: 9 March 2016 / Published: 15 March 2016
(This article belongs to the Special Issue Glass Fibers)
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This study reports the development of a fiber-reinforced alkali-activated binder (FRAAB) with an emphasis on the performance and the durability of the fibers in the alkaline alkali-activated binder (AAB)-matrix. For the development of the matrix, the reactive components granulated slag and coal fly ash were used, which were alkali-activated with a mixture of sodium hydroxide (2–10 mol/L) and an aqueous sodium silicate solution (SiO2/Na2O molar ratio: 2.1) at ambient temperature. For the reinforcement of the matrix integral fibers of alkali-resistant glass (AR-glass), E-glass, basalt, and carbon with a fiber volume content of 0.5% were used. By the integration of these short fibers, the three-point bending tensile strength of the AAB increased strikingly from 4.6 MPa (no fibers) up to 5.7 MPa (carbon) after one day. As a result of the investigations of the alkali resistance, the AR-glass and the carbon fibers showed the highest durability of all fibers in the FRAAB-matrix. In contrast to that, the weight loss of E-glass and basalt fibers was significant under the alkaline condition. According to these results, only the AR-glass and the carbon fibers reveal sufficient durability in the alkaline AAB-matrix. View Full-Text
Keywords: alkali-activated binder; fibers; durability; geopolymer alkali-activated binder; fibers; durability; geopolymer

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Funke, H.; Gelbrich, S.; Kroll, L. The Durability and Performance of Short Fibers for a Newly Developed Alkali-Activated Binder. Fibers 2016, 4, 11.

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