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Characterization of Manmade and Recycled Cellulosic Fibers for Their Application in Building Materials

Journal of Renewable Materials 2019年第11期7卷 1121-1145页

作者： Nadezda Stevulova Viola Hospodarova Adriana Estokova Eva Singovszka Marian Holub Stefan Demcak Jaroslav Briancin Anton Geffert Frantisek Kacik Vojtech Vaclavik Tomas Dvorsky Technical University of Kosice Faculty of Civil EngineeringInstitute of Environmental EngineeringVysokoskolska 404200 KosiceSlovakia Institute of Geotechnics of the Slovak Academy of Sciences Watsonova 4504353 KosiceSlovakia Technical University in Zvolen Faculty of Wood Sciences and TechnologyDepartment of Chemistry and Chemical TechnologiesT.G.Masaryka 2117/2496053 ZvolenSlovakia VSB-Technical University of Ostrava Faculty of Mining and GeologyDepartment of Environmental Engineering17.listopadu 15/217270833 Ostrava-PorubaCzech Republic

The aim of this study was to characterize two types of cellulosic fibers obtained from bleached wood pulp and unbleached recycled waste paper with different cellulose content(from 47.4 percent up to 82 percent),to compare and to analyze the potential use of the recycled fibers for building application,such as plastering *** in the chemical composition,cellulose crystallinity and degree of polymerization of the fibers were *** recycled fibers of lower quality showed heterogeneity in the fiber sizes(width and length),and they had greater surface roughness in comparison to high purity wood pulp *** high purity fibers(cellulose content>80.0 percent)had greater crystallinity and more homogeneous and smooth surfaces than the recycled *** presence of calcite and kaolinite in all of the recycled cellulosic fibers samples was confirmed,whereas only one wood pulp sample contained *** influence of the chemical composition was reflected in the fiber density *** in the chemical composition and cellulose structure of the fibers affected the specific surface area,porosity and thermo physical properties of the *** favorable values of thermal conductivity were reached for the recycled fibers than for the wood pulp *** the suitability of the recycled fibers with inorganic impurities originating from the paper-making processes for their use as fillers in plastering mortars(0.5 wt.%fiber content of the total weight of the filler and binder)confirmed their application by achieving a compressive strength value of 28 day-cured fiber-cement mortar required by the standard as well as by measured more favorable value of capillary water absorption coefficient.

关键词： wood pulp waste paper fiber properties characterization compressive strength of mortars

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