What are the characteristics of CLT board in architecture?

CLT (Cross Laminated Timber), also known as orthogonal laminated timber, has the advantages of fast assembly, short construction period, low noise, no pollution and no construction waste at the construction site. It can be reused after disassembly. It has good mechanical properties and dimensional stability. CLT structural system is a new wooden structural system with CLT floor slab, wall panel and roof panel as the main load-bearing components

1. Energy conservation and environmental protection
With the introduction and promotion of the concept of "low carbon", people also pay more and more attention to the low energy consumption, comfort and safety of their living space. For the indoor air quality, a series of tests on the toxic gases produced by CLT wood materials have proved its safety level. The CLT adhesive layer has been tested for volatile organic compounds, including the release of formaldehyde, which also proves its high environmental standards. The amount of volatile organic compounds (VOCs) detected in a series of tests is only about one part per billion (ppb), which is far below the limit value of 50ppb that can cause harm to human health. CLT (orthogonal glued wood) wood structure buildings can adjust themselves according to the changes of air temperature and humidity, and are reputed as "breathing houses".
2. Extremely high strength and stability
Based on the nature of the building structure, CLT (orthogonal glued wood) is a glued engineering wood product, which has strong load-bearing capacity in both horizontal and vertical directions. Through this way of horizontal and vertical overlapping gluing, the problems of deformation and settlement of the wood structure have been solved. Compared with the traditional wood structure technology, CLT (orthogonal glued wood) has better mechanical properties and dimensional stability.
3. Excellent fire resistance
So far, there has been a common misunderstanding about the fire prevention of wooden structures, which also directly affects the application and development of wooden structures. CLT wood has excellent fire resistance, which is similar to the characteristics of heavy wood structure: in case of fire, the surface layer of CLT wood material will carbonize slowly at a certain rate and maintain the original internal structural strength for a long time. Therefore, this carbonization effect can also further ensure the structural strength of the board. In earthquake-prone areas, the focus of safety design is the seismic capacity of the structural system. CLT, as a building material, together with other connectors and fasteners used in construction, ensures that the overall structure has strong seismic resistance. In Sanki, Kobe, Japan, a seven-storey building structure made of CLT materials in the earthquake prevention laboratory has withstood a series of high-intensity earthquake simulation tests, and the results show that the CLT building has not sustained significant structural damage.
4. "Thermal insulation and sound insulation", "strong seismic resistance" and "high construction efficiency"
CLT (orthogonal glued wood) prefabricated wooden structure building has good thermal insulation, with thermal insulation coefficient of 8-16 times of that of concrete, sound insulation and noise reduction effect of 4 times of that of concrete, and has good stability and flexibility. It can absorb and dissipate energy in earthquake, and has strong resistance to instant impact load and periodic fatigue damage, which has been fully proved in many earthquake areas. In addition, CLT (orthogonal glued wood) materials are completely prefabricated, standardized and modular in the factory, so the on-site construction is simple and fast, and the construction speed is usually 70% - 80% less than the concrete construction time. In addition, the site is completely dry and will not be affected by seasonal changes. It can be used not only for low-rise buildings, but also for civil and non-civil buildings in the middle and even high floors, and can also be mixed with steel structures or concrete