PFI-RP: Manufacture of Durable and Stable Cross-Laminated Strand-Veneer Lumber for Mass Timber Construction

PFI-RP：制造用于大体积木结构的耐用且稳定的交叉层压单板木材

基本信息

批准号：
1827434
负责人：
Vikram Yadama
金额：
$ 74.99万
依托单位：
Washington State University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2018
资助国家：
美国
起止时间：
2018-09-15 至 2023-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1827434&HistoricalAwards=false
关键词：
PFI RP Manufacture Durable Stable

项目摘要

The broader impact/commercial potential of this PFI project is in development of a commercially-viable process for manufacturing high-performing, durable mass strand timber panels for building construction from low-value and underutilized small-diameter softwood trees, such as from hazardous fuel thinning operations for improved forest health. The broader impacts are: (1) advancement of discovery and understanding while promoting teaching, training, and learning by including students and faculty in the research; (2) enhancement of infrastructure for research and education by establishing collaborations between interdisciplinary, yet complementary academic and industry stakeholders; (3) broadening of research dissemination to enhance understanding by involving industry and academia in the research, publishing project results in diverse media sources, and presenting research results in several formats that will benefit a wide range of forest products industry stakeholders; and (4) improved economic competitiveness of the U.S. forest products industry. In addition, if this proof-of-concept research leads to commercial applications, the benefits to society are: (1) new products with reduced environmental impacts, improved durability, and longer service-life; (2) technology that increases the U.S. forest products industry's competitiveness through creation of new jobs and increased opportunities for potential exports; and (3) increased use of wood, an environmentally-friendly, renewable, sustainable, and carbon-sequestering material.The proposed project addresses challenges facing cross-laminated timber (CLT) panels in mass timber construction. Construction currently requires extreme care to protect CLT panels from moisture while ensuring long-term durability. Although builders take measures to reduce moisture exposure, it is inevitable that the CLT panels will take on water during their service-life. This project addresses these problems by utilizing thermal modification to produce chemical-free, mass timber panels with increased resistance to moisture and decay and improved dimensional stability. The goals are to: (1) evaluate process-performance relationships for thermal modification of small-diameter wood strands, and (2) demonstrate the feasibility of manufacturing high-performance cross-laminated strand-veneer lumber (CLSVL) mass timber panels. The objectives are to: (1) demonstrate the feasibility of utilizing thermally modified laminated strand veneer lumber for production of high-performance CLSVL panels, and (2) determine the potential environmental impacts of the new CLSVL panels. The technical results include validation of a repeatable process for thermally modifying small-diameter pine strands, validation of a method for manufacturing CLSVL panels, verification of physical and mechanical performance of the CLSVL panels, and establishment of commercially-viable process-performance relationships to enable commercial production of the CLSVL mass timber panels.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该PFI项目的更广泛的影响/商业潜力是开发出可行的可行的过程，用于制造高性能，耐用的质量链木板，用于建造低价值和未充分利用的小直径软木树，例如从危险的燃料稀疏操作中，以改善森林健康。更广泛的影响是：（1）通过在研究中包括学生和教师来促进教学，培训和学习的同时提高发现和理解的发展；（2）通过建立跨学科但互补的学术和行业利益相关者之间的合作来增强研究和教育的基础设施；（3）扩大研究传播，通过使行业和学术界参与研究来增强理解，发表项目会导致各种媒体来源，并以几种格式提出研究结果，这些形式将使广泛的森林产品行业利益相关者受益；（4）改善了美国森林产品行业的经济竞争力。此外，如果此概念验证研究导致商业应用，那么对社会的好处是：（1）具有降低环境影响，提高耐用性和更长服务寿命的新产品；（2）通过创造新工作和增加潜在出口机会来提高美国森林产品行业的竞争力的技术；（3）木材的使用增加，一种环保，可再生，可持续和碳序列材料的使用。拟议的项目解决了大规模木材建设中跨层压木材（CLT）面板面临的挑战。目前，建筑需要极大的注意，以保护CLT面板免受水分的侵害，同时确保长期耐用性。尽管建筑商采取了减少水分暴露的措施，但不可避免的是，CLT面板在服务寿命期间会取水。该项目通过利用热修饰来解决这些问题，从而产生无化学物质的大型木板面板，具有对水分和衰减的耐药性，并改善了尺寸稳定性。目标是：（1）评估小直径木链热修饰过程的过程 - 性能关系，（2）证明了制造高性能交叉跨层压的链板贴面木材（CLSVL）质量木板的可行性。这些目标是：（1）证明了利用热改良的层压板贴面木材来生产高性能CLSVL面板的可行性，并且（2）确定新CLSVL面板的潜在环境影响。技术结果包括验证可重复修改小直径的松树链的验证，验证制造CLSVL面板的方法，验证CLSVL面板的物理和机械性能的验证以及建立了可靠的过程 - 过程 - 过程 - 性能 - 性能 - 性能的关系，以促进CLSVL MASSVL MASSVL MAPER TEREM的奖励。利用基金会的知识分子和更广泛的影响审查标准。