Ground iron blast furnace slag as a matrix for cellulose-cement materials |
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| Affiliation: | 1. Faculty of Animal Science and Food Engineering, Rural Construction, University of São Paulo, P.O. Box 23, 13635-900 Pirassununga SP, Brazil;2. CSIRO Forestry and Forest Products, Private Bag 10, Clayton South MDC, Victoria, Australia 3169;3. ASSEDO Pty Ltd, 75 Sandringham Road, Sandringham, Victoria, Australia 3191;1. Institut für Algebra, Zahlentheorie und Diskrete Mathematik, Leibniz Universität Hannover, Hannover, D-30167, Germany;2. Department of Mathematics, University of British Columbia, Vancouver, BC V6T 1Z2, Canada;1. School of Minerals, Metallurgical and Materials Engineering, Indian Institute of Technology Bhubaneswar, Bhubaneswar, Odisha, 751007 India;2. Advanced Materials Technology Department, Council of Scientific and Industrial Research – Institute of Minerals and Materials Technology, Bhubaneswar, Odisha, 751013 India;1. Centrale Lille, LML, FRE CNRS 3723, and UCCS, UMR CNRS 8181, CS20048, F-59651 Villeneuve d’Ascq, France;2. L2MGC, EA 4114, Université de Cergy-Pontoise, F-95011 Cergy-Pontoise, France;3. LMCPA, Université de Valenciennes, F-59600 Maubeuge, France;4. LASIR, UMR CNRS 8516, Université de Lille 1, Villeneuve d''Ascq, France |
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| Abstract: | The use of ground iron blast furnace slag (BFS) as a low-cost alternative to ordinary Portland cement (OPC) binders in fibre-cement products was examined. Both high quality softwood fibres and residual sisal from agricultural waste were chemically pulped and used as reinforcement. Composites based on several different binder formulations consisting of slag chemically activated by mixtures of gypsum and hydrated lime displayed their optimum strength and fracture toughness properties at fibre contents between 8% and 12%, with values in the ranges of 14.7–24.5 MPa and 1.13–2.36 kJ/m2, respectively. Corresponding flexural moduli lay in the range 4.3–7.8 GPa and, at 12% fibre content, the composites possessed water absorption values up to 34% by mass and densities in the region of 1.3 g/cm3. A formulation of BFS activated by 10% gypsum and 2% lime presented a good compromise between strength and energy absorption combined with a reasonable price. |
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