Research On Fiber Reinforced Wood-plastic Composite And Its Application Performances In WPC Formwork Cover

Wood-plastic composite (WPC) mix formed with waste plant fiber and plastic,unites the virtues of plant fiber and macromolecule materials, and has unique advantagein application for construction framework, such as low deformation after waterabsorption, non-adhere to concrete surface, erosion-proof, high dimensional stability, etal. Furthermore, the application of WPC framework well serves the wholesale demandfor building a resource-saving and environment-friendly society. However, as a kind ofon-site construction framework under exposure, it must underwear diversified loadingimpact and abrasion, and stand multiple environmental factors coupling action, andwhat’s more, ensure hardly happened on disastrous effect due to organic WPCframework flaming during building construction. If using a little amount of fibers,which have high-quality and reasonable price, excellent mechanical performance andgood interface compatibility, improve the composite property, it could improve thetemplate properties, which not only saves cost but also makes the template achieve agood comprehensive template performance requirements.Chrysotile fiber (CAF), Polyvinyl alcohol fiber (PVAF), Basalt fiber(BF)respectively has unique kind of high performances, wear resistance, thermal insulation,and/or alkali corrosion. Here, three kinds of fibers, as the reinforcer, are respectivelyincorporated into waste wood fiber and polypropylene plastic matrix through certaindispersion method, and then fabricating a kind of fiber reinforced composite(CAF/WPC, PVAF/WPC, BF/WPC) and the corresponding framework product throughhot-pressing technique. Excellent properties of three kinds of fibers are employed toeffectively enhance the strength/ductility, flame/thermal retardation and wear resistanceof the common WPC, etc, and finally compare the feasibility and economy of threefibers reinforcing WPC as the WPC formwork cover. The results show: the tensileperformance, flexural performance and impact performance of CAF/WPC compositewith15%CAF addition respectively increases41.2%,38.06%,42.2%, and its flametime and amount of wear decreases63.41%and68.9%, respectively; the tensileperformance, flexural performance and impact performance of PVAF/WPC composite respectively increases66.7%,54.3%,38.8%, its amount of wear decrease81.8%; thetensile performance, flexural performance and impact performance of BF/WPCcomposite respectively increases44.2%,24.7%,1.0%, its amount of wear decrease85.6%; comparing to ordinary WPC template layer, the cost of CAF/WPC templatelayer only increases l.77%, PVAF, BF/WPC13.86%and21.6%. CAF/WPC templatelayer with comprehensive performances can be a superior energy saving andenvironmental choice for fresh-water concrete formwork, from the viewpoint either ofperformance(mechanical performance, flame retardant, wear resistance) and cost in use.