In order to solve the problems of asphalt pavement cracks, deformation, granule peeling and other diseases, Dynapac has proposed an innovation in the construction of asphalt pavement: composite asphalt mixture surface layer, and the double paver is exactly this idea. Results. The machine will layer the two layers of the two different asphalt mixtures in one layer with a double paver. The difference from the traditional 4cm surface paving is that the surface layer is reduced to only 2cm.
This new paver is a composite because it contains the overall structure and technical components of the upper paver and its own energy supply system. In addition to the screw conveyor, the screw conveyor replaces the scraper conveyor on the conventional paver and transports the mix from the elevated upper hopper to the paving slab. This component is trailer-style and can be contracted as the paver walks. In addition, since the asphalt mixture of different compositions is simultaneously paved to produce a thick asphalt mixture laminate, it will cool very slowly and utilize the waste heat of the next layer.
Products made from WPC are suitable for indoor and outdoor use. Their properties are customisable depending on the ingredient composition. Numerous products are already available on the market; additional products are expected for the next few years.
WPC Products have already been used successfully in many areas:
Building industry
Furniture industry
Automotive industry
Measurement engineering
Wood plastic composite Marketing Opportunities
In recent years, the market of wood plastic composites in North America has increased greatly and attracted the interest of both the plastics and the forest products industries. These wood-based composites have been successful in the marketplace primarily because they deliver consistently appropriate structural performance at a reasonable cost.
In the building community, there is a growing demand for high-performance, low-maintenance, and low-cost building products. To meet this demand, natural fiber thermoplastic composites are being used to produce such products as landscape timbers, railing, decking, fence, window and door elements, panels, molding, roofing, and siding, even floor ,louver, and indoor furniture have been reported. Some research point that wood plastic composites have become a major player in the North American decking market. Qizhen indicate that the advantages of wood-plastic composites can cause increase demands for value-added products made from them, and the market will increase dramatically in the near future and continue to grow in long-term. Recycling may help the wood-plastic composites industry as the recycling industries prepares for their future materials and their needs.
The demand of wood pallets and shortage of solid wood provide a large market for wood plastic composites in North America and Asia region. Besides, wood pallets and shipping crates represent a large source of raw material available for use in value-add composites. Recycling and reproducing would provide good market for wood-plastic composites. Furthermore, some synthetic materials can provide additional market for recycled plastic.
The phase-out of chromated copper arsenate (CCA) may give wood plastic composites opportunities to increase awareness of alternatives to CCA-treated lumber. Kamdem et al. studied the properties of wood-plastic composites made of wood flour from CCA-treated wood and recycled HDPE.
Lignocellulosics will be used in the future to produce a wide spectrum of composite products ranging from very inexpensive, low-performance materials to materials that are relatively expensive and have high-performance characteristics. Taking advantage of the wide distribution, renewability, and recyclability of lignocellulosics, more markets will be developed for low-cost renewable materials. By chemically modifying the lignocellulosic cell wall to overcome some of its disadvantageous properties, new markets for high-performance composites will develop.
By incorporating continual new product development into a firm`s R&D process, the forest products industry can greatly benefit through increased profitability, improved customer and stakeholder perceptions, and reduced risk of litigation and regulation. Moreover, concurrent new product and market development efforts, integrating customer needs back into the design and engineering of new products, will provide competitive advantage to WPC industry innovators.
In Asia region, market for wood-plastic composites has just started recently, and has more potential than North America because of the great market demand and the shortage of wood. Especially in mainland China, market may increase with Olympic 2008 in Beijing. The constructions of civil buildings will also provide opportunities for wood-plastic composites applications.
The future of WPC will depend on many factors, including new product identification, product quality, consumer reaction, and success of research and development efforts. Success will also depend on how well the forest products and plastics industries continue to establish relationships and work with each other.
Wood Plastic Composite Products, WPC Products, Outdoor Decking, Outdoor Decking Board
Shangyu YongSheng New Material Co., Ltd. , http://www.wpc-deckingboard.com