Comparison between the WPC materials & timber materials applicated in outdoors
Timber gardens as an important building, and now has been more widely used. It has unmatched by other materials, excellent performance, such as renewable, non-polluting and energy-saving environmental protection, environmental coordination function. Along with the timber industry and the needs of landscape diversity, preservation of wood, red cedar, the surface of carbonized wood, the depth of charring wood, wood composites and other types of wood outdoor garden building after another. What these materials have their own pros and cons, garden, how to choose? Wood conservation experts with experience in the development center to make the following summary analysis for the industry to explore.
Wood building materials classification and performance comparison
Wooden garden building consists of precious wood, wood preservative, carbonized wood (the depth of charring the surface of carbonized wood and wood) and wood-plastic composite materials. Wood building materials used in relatively long history of landscape architecture, to our earlier use of wooden garden building is a main force of natural decay of wood. Such as Phoebe, pineapple, oil and other tip. With the strengthening of human awareness of environmental protection, governments pay more attention to environmental sustainability, have introduced measures to combat illegal logging and associated timber trade practices (such as the U.S. "Lacey Act"). Therefore, the application of these natural wood less and less. But there is a high natural decay resistance force of the Canadian red cedar wood, still has some outdoor construction applications.
Since the 1990s, China's rapid development of wood preservation technology, greatly expanding the plantation timber garden building in the use of space. Wood preservative widely used in garden boardwalk, pavilions, waterside corridors, flower fences, flower bed, litter bins, outdoor furniture and other indoor and outdoor architecture project.
In recent years, China has emerged environmental performance of carbonized wood, because of its health and environmental protection, cracking moisture, dimensional stability and other properties, also in landscape architecture more and more popular. Is often made into indoor and outdoor wall, room decor, indoor furniture, garden pieces, and other forms of outdoor wood doors and windows.
In addition, wood-plastic composite materials because of its excellent corrosion resistance, is also being gradually extended; wood materials also reduce resource consumption and improve resource utilization, energy conservation, recycling characteristics, and thus meet the reduction, reuse, recycling concept of circular economy, to build a conservation-oriented industrial structure, conservation-oriented growth, saving and consumption patterns and sustainable development has a positive role in promoting a harmonious society, the current efforts to promote industrial restructuring and transformation economic development is of great practical significance, so the wood material is a typical green low-carbon products, the development of wood industry is consistent with the scientific concept of development, in line with national industrial policy; the same time, the National Development and Reform Commission, Ministry of Industry, Ministry of Finance ministries have also been concerned about and support China's wood industry.
Performance strengths and weaknesses of different wood materials, applications are not the same. Such as the corrosion resistance, the wood preservative and wood-plastic composite materials are relatively good, the depth of anti-corrosion performance of carbonized wood preservative is equivalent to 2,3-grade wood, and red cedar sapwood is non-corrosion performance.
Selection of wooden garden building
Force on the decay, the wood-plastic composite materials is the best choice, but according to the conditions of use to use. For example, in outdoor use to be able to foresee its creep (deformation) issues and make a response in advance.Under the ultraviolet light, the interface will produce wood-plastic composites from the seam, knocking sound will have a run-down. Moreover, the material brittleness, impact resistance is poor, do the floor to be alert and pay attention to supplier qualification, model selection (hollow / solid) and construction issues.However, the material used for construction of water body landscape is promising, but its price is relatively high.
Experience on the degree of natural wood and environmental level, the carbonized wood is the best choice. Carbonized wood in the production process, use and after use will not harm the environment and the human body. Meanwhile, the carbonized wood in the heat treatment process, the functional groups due to its semi-absorbent cellulose is reorganized, the products showed better physical properties, such as no cracking, no deformation. However, due to decreased strength and other reasons, the material is not recommended for the deposit containing components. Also, do not allow direct contact with water and soil environment of the material.
The price, the advantages of wood preservative is more prominent. Europe, Japan and other places in residential areas of CCA wood preservative is disabled, this inference, the future of our country may also disable CCA wood preservative. But as popular with users of its plantations welcome, but the material's properties are relatively stable.
Surface of the carbonized wood is currently in the promotion period, it can show a variety of wood grain appearance, the material development of the industry's prospects are generally good.
In short, we are in the actual selection of wooden building materials, we must uphold the principle of local conditions, taking into account the artistic, economic and environmental protection, but also the courage to introduce new building for the flourishing gardens to contribute.
