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GRC学术专题一:Advanced Cement Based Materials
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Durability of glass fiber reinforcedcement composites:: Effect of silica fume and metakaolin

Shashidhara Marikunte, Corina Aldea, Surendra P. Shah

NSF Center for Advanced Cement-Based Materials, Northwestern University, Evanston, Illinois, USA

Cement; Composite; Durability; Flexure; Glass fibers; Metakaolin; Pozzolan; Silica fume; Tension; Toughness

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The primary concern for glass fiber reinforcedcement composites (GFRC) is the durability of glass fibers in the alkaline environment of cement. Despite the use of improved alkaline-resistant glass fibers (AR-glass) and pozzolanic materials such as silica fume and fly ash, durability concerns still exist. This report presents an experimental investigation on the hot-water durability of glass fiber reinforcedcement composites. Hot-water durabilities of AR-glass fiber reinforced composites in blended cement matrix were compared for their flexural and tensile performance. The different matrices selected were (a) cement; (b) cement 25% metakaolin; and (c) cement 25% silica fume. Specimens after normal curing of 28 days were immersed in a hot water bath at 50°C for up to 84 days and then tested in flexure and tension. The results indicate that the blended cement consisting of synthetic pozzolan metakaolin significantly improves the durability of GFRC composite.

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http://dx.doi.org/10.1016/S1065-7355(97)00003-5, How to Cite or Link Using DOI
Received 19 August 1996 Accepted 31 January 1997 Available online 15 May 1998

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