Development of sustainable building products using bamboo and underutilized wood in Canada

现在，大量木材已作为可接受的解决方案正式纳入加拿大建筑法规，未来几年，高层木结构建筑对木材的需求将超过现有行业的供应能力。该项目旨在通过创造新一代工程轻型框架和大量木材产品来补充和扩大现有和较少使用的当地木材供应的使用，如杨木和西部铁杉，其竹材生长更快、更坚固和更坚韧。竹子的收获周期为3至5年，而林木的收获周期为50至80年，竹子形成了一种独特的材料，比木材具有更高的韧性、抗拉强度、弯曲强度和延展性，使其成为一种用途极其广泛的建筑和结构建筑材料。需要克服的挑战包括难以将竹材与现有的结构木材粘合剂粘合在一起，以及确保木材-竹材混合建筑产品符合现有的结构性能和针对大量木材的严格防火设计规范。竹子密度较高，导热系数较大，但炭化速度较慢，这将影响混合建筑构件的设计和制造。我们正在与专门从事木材和竹子建筑的科学家、供应商、开发商、建筑师和结构工程师合作，开发原型产品，在不列颠哥伦比亚省当地制造，创造就业机会，并将新产品用于建设示范项目，以提高公众意识和推广，并持续监测材料耐用性和热效率等功能。该项目将有助于提高市场意识和需求，以推动国内(即北美)竹材种植，更多地利用较少使用的当地木材，并有助于巩固加拿大作为世界领导者的地位，从碳密集型混凝土和钢铁建筑过渡到创新的低碳木材建筑。

Now that mass timber has been formally included in Canadian building codes as acceptable solutions, in coming years demand for lumber for tall wood buildings will outstrip existing industry supply capacity. This project aims to address this by creating a new generation of engineered light frame and mass timber products that supplement and extend the use of current and lesser-used local wood supplies such as Aspen and Western Hemlock with much faster growing, stronger and tougher bamboo timber. Bamboo has a 3 to 5 year harvest cycle compared with 50 to 80 years for forest trees and forms a unique class of materials with greater toughness, tensile, and flexural strength and ductility than wood, making it an extremely versatile architectural and structural building material. Challenges to overcome include difficulties bonding bamboo with existing structural wood adhesives, and ensuring wood-bamboo hybrid building products will conform to existing structural performance and stringent fire design codes for mass timber. Bamboo's higher density gives it greater thermal conductivity but also a slower charring rate which will influence the design and fabrication of hybrid building members. We are working with scientists, suppliers, developers, architectures, and structural engineers specialized in wood and bamboo buildings to develop prototype products, manufacture them locally in BC, creating employment opportunities, and use the new products in building demonstration projects that will allow for public awareness and promotion, and ongoing monitoring of functionality such as materials durability and thermal efficiency. The project will help promote market awareness and demand to drive domestic (i.e. North American) bamboo timber cultivation, greater utilization of lesser-used local woods, and help solidify Canada's position as a world leader in transitioning away from carbon-intensive concrete and steel construction to innovative low-carbon timber-based construction.