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Asbestos-free technology with new high toughness polypropylene (PP) fibers in air-cured Hatschek process
Affiliation:1. Saint-Gobain do Brasil, Brasilit Division, Centre of Development and Projects, Av. Santa Marina 394, Sao Paulo/SP, P.O. 05036-903, Brazil;2. Saint-Gobain do Brasil, Brasilit Division, Av. Cristal 530, Jacarei/SP, P.O. 12.311-210, Brazil;3. Saint-Gobain Brasil, Brasilit Division Road, Campinas-Tiete SP-101, 1600 Capivari/SP, P.O. 13.360-000, Brazil;1. Rural Construction - Faculty of Animal Science and Food Engineering, University of São Paulo. Av. Duque de Caxias Norte, 225, P.O. Box 23, 13635-900 Pirassununga, SP, Brazil. E-mail address: holmersj@usp.brl, Tel./Fax: +55 19 35654153/+55 19 35654114;2. Department of Civil Construction Engineering, Polytechnic School, University of São Paulo, 05508 900 São Paulo, Brazil. E-mail address: vanderley.john@poli.usp.br, Fax: +55 11 30915544;3. Department of Civil Construction Engineering, Polytechnic School, University of São Paulo, 05508 900 São Paulo, Brazil. Email address: vahan.agopyan@poli.usp.br;4. University of Idaho, USA; E-mail address: amoslemi@uidaho.edu, Tel: +1 208-661-4372;1. Department of Structural, Geotechnical and Building Engineering, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Turin, Italy;2. Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Turin, Italy;1. Macromolecular Science and Engineering, University of Michigan, Ann Arbor, MI, United States of America;2. Biosystems Engineering, University of Sao Paulo, Pirrassununga, SP, Brazil;3. Materials Science and Engineering, University of Michigan, Ann Arbor, MI, United States of America;4. Civil and Environmental Engineering, University of Michigan, Ann Arbor, MI, United States of America;1. Centre for Infrastructural Monitoring and Protection, School of Civil and Mechanical Engineering, Curtin University, Australia;2. Ningbo Shike New Material Technology Co. Ltd, Ningbo, China;3. College of Science & Engineering, James Cook University, QLD 4811, Australia;1. Department of Cellulose and Paper Technology, Faculty of New Technologies Engineering, Shahid Beheshti University, Science and Research Campus, Zirab, Savadkooh, Mazandaran, Iran;2. Department of Wood and Paper Science and Technology, Faculty of Natural Resources, University of Tehran, Karaj, Iran;3. Department of Civil Engineering, Architecture and Building, Faculty of Engineering & Computing, Sir John Laing Building, Coventry University, Coventry, UK;4. Department of Biotechnology, Iranian Research Organization for Science and Technology (IROST), Tehran, Iran
Abstract:After almost 70 years of experience in the fiber–cement production in Brazil, Saint-Gobain Brasilit started the non-asbestos production using polyvinyl alcohol (PVA) fiber technology in 2002.Due to PVA costs and availability problems, efforts were done to develop a local high toughness polypropylene (PP) fiber, with improved frictional interface and better dispersion and affinity to Portland Cement matrix.In the last 5 years, more than 1.6 million tons of asbestos-free corrugated and flat sheets have been produced and commercialized representing about 200 million square meters.This paper reviews the alternative fibers for replacing asbestos and the reinforcing model in cement based products. It also presents the Brasilit high toughness polypropylene fibers properties, its manufacturing process and its mechanical performance and improved impact resistance behavior comparing to fiber–cement products available in the Brazilian market.
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