Durability Analysis of Structural Oriented Strandboard Made with Borate-Modified Wood Flakes

硼酸盐改性木片结构定向刨花板的耐久性分析

• 批准号: 0080248
• 负责人: Qinglin Wu
• 金额: $ 15万
• 依托单位: Louisiana State University Agricultural Center
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-07-15 至 2004-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0080248&HistoricalAwards=false
• 关键词: Durability; Analysis; Structural; Oriented; Strandboard

Oriented Strandboard (OSB) is a structural wood composite widely used in house construction as sheathing, flooring, and I-joist materials. As a biological material, OSB is subject to attack from Formosan termites, which nationwide cause over $2 billion a year in damages to homes. Borate-based systems have been shown to provide adequate termite protection for OSB. However, the addition of the chemical often leads to a significant reduction in the strength and durability of OSB. The goal of this project is to pursue an overall understanding of the influence of borate addition on OSB's strength and long-term durability. The specific objectives are: (1) To develop pressing technology for manufacturing OSB with borate-modified flakes; (2) To determine the effects of borate addition on panel stiffness, strength, and stability; (3) To determine contents and micro-distribution of zinc-borate within wood flakes; and (4) To measure and model the creep behavior of the OSB. In this work, borate-modified OSB panels will be manufactured. Panel strength, chemical content and distribution, swelling and creep properties will be determined. Mathematical models will be developed to describe observed creep and durability behavior. The work will lead to the development of processing technology and fundamental durability information information for the manufacture of durable OSB with sound biological performance.

定向刨花板（OSB）是一种结构木复合材料，广泛应用于房屋建筑中，作为护墙板、地板和工字梁材料。作为一种生物材料，OSB受到台湾白蚁的攻击，台湾白蚁每年在全国造成超过20亿美元的房屋损失。以硼酸盐为基础的系统已被证明可以为OSB提供足够的白蚁保护。然而，化学品的加入往往导致OSB的强度和耐久性显著降低。该项目的目标是全面了解硼酸盐添加对OSB强度和长期耐久性的影响。具体目标是：(1)开发用硼酸盐改性薄片制造OSB的压制技术；(2)确定硼酸盐添加量对面板刚度、强度和稳定性的影响；(3)测定木片中硼酸锌的含量和微观分布；(4)对OSB的蠕变行为进行测量和建模。在这项工作中，将制造硼酸改性OSB板。面板强度，化学成分和分布，膨胀和蠕变性能将被确定。将开发数学模型来描述观察到的蠕变和耐久性行为。该工作将为制造具有良好生物性能的耐用OSB提供加工技术和基本耐久性信息。