J. Phys. IV France 123 (2005) 155-158
The durability of alkali-resistant glass fibres in cement matrixA. Ayadi1, M. Palou2 and A. Iratni1
1 Department of Engineering Materials, Faculty of Engineer Sciences, University of Boumerdes, 35000 Boumerdes, Algeria
2 Department of Ceramics, Glass and Cement, Slovak University of Technology Bratislava, Slovakia
The purpose of the paper is to investigate the durability of glass fibres in cement matrix containing silica fume (15, 25, 40 wt. %) with emphasis on the mechanism of their interaction with cement, to elucidate the effect of these interactions on the durability performance of alkali resistant glass fibers and, finally, to present observations obtained by scanning electron microscopy of the environment attack. The accelerated procedure method, Strand in Cement (SIC), in which the specimens are cured at hydrothermal conditions has been applied and the results were used to predict long term behaviour of these glass fibers. AR-glass based on ZrO2 is alkaline resistant, but it deteriorates during prolonged wet cure. Silica fume, due to its pozzolanic properties has decreased the alkalinity of cement matrix by reacting with Ca(OH)2. The treatment of alkali resistant glass fibers with silica fume was effective in improving durability performances of glass fibres in cement matrix and fibres reinforced cement composites.
Key words: Glass fibres, cement composites, durability, accelerated test, breaking load, microstructure, pH.
© EDP Sciences 2005