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

• 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

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.

这个PFI项目的更广泛的影响/商业潜力在于开发一种商业上可行的工艺，用低价值和未充分利用的小直径软木树，例如用于改善森林健康的危险燃料稀释作业，制造高性能、耐用的大股木材板。更广泛的影响是：(1)通过让学生和教师参与研究，促进发现和理解，同时促进教学、培训和学习；(2)通过建立跨学科、互补的学术和行业利益相关者之间的合作，加强研究和教育的基础设施；(3)扩大研究传播，让产业界和学术界参与研究，在不同的媒体来源发布项目成果，并以多种形式展示研究成果，使林产品行业利益相关者广泛受益，从而增进了解；(4)提高了美国林产品工业的经济竞争力。此外，如果这一概念验证研究导致商业应用，对社会的好处是：(1)新产品减少了对环境的影响，提高了耐久性，延长了使用寿命；(2)通过创造新的就业机会和增加潜在出口机会来提高美国林产品工业竞争力的技术；(3)增加木材的使用，这是一种环保、可再生、可持续和碳封存的材料。拟议的项目解决了大规模木结构中交叉层压木材（CLT）面板面临的挑战。目前的施工需要非常小心，以保护CLT面板防潮，同时确保长期耐用性。尽管建筑商采取措施减少水分暴露，但CLT面板在其使用寿命期间不可避免地会进水。该项目解决了这些问题，利用热改性生产无化学物质的大质量木板，增加了防潮性和防腐蚀性，提高了尺寸稳定性。目标是：(1)评估小直径木链热改性的工艺性能关系，以及(2)证明制造高性能交叉层压链单板木材（CLSVL）大质量木板的可行性。目标是：(1)证明利用热改性层压单板木材生产高性能CLSVL板的可行性，以及(2)确定新的CLSVL板的潜在环境影响。技术结果包括验证热改性小直径松链的可重复工艺，验证制造CLSVL板的方法，验证CLSVL板的物理和机械性能，以及建立商业上可行的工艺性能关系，以实现CLSVL大质量木材板的商业生产。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Cross-laminated strand veneer lumber mass timber panels from thermally modified strands

• DOI: 10.1016/j.conbuildmat.2023.130370
• 发表时间: 2023-03
• 期刊: Construction and Building Materials
• 影响因子: 7.4
• 作者: Ruben Jerves;V. Yadama;M. Aro;M. R. Pelaez‐Samaniego

Towards durable wood-strand composite mass timber panels

迈向耐用的木绞线复合大体积木板

• 发表时间: 2022
• 期刊: 12th International Conference on Wood Adhesives
• 作者: Jerves, Ruben;Yadama, Vikram;Aro, Matt;Pelaez-Samaniego, Manuel
• 通讯作者: Pelaez-Samaniego, Manuel