Partnership for Advancing Technologies in Housing: An Integrated Program to Examine the Moisture-related Performance of Fiber-cement Composites

推进住房技术合作：检查纤维水泥复合材料与湿度相关性能的综合计划

• 批准号: 0122068
• 负责人: Kimberly Kurtis
• 金额: $ 15万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-15 至 2005-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0122068&HistoricalAwards=false
• 关键词: Partnership; Advancing; Technologies; Housing; Integrated

PATH: An Integrated Program to Examine the Moisture-related Performance of Fiber-cement CompositesThe effect of wet/dry cycling on fiber-cement composites and the resulting mechanisms of damage have not been the subject of an extensive systematic examination. This lack of fundamental knowledge limits our ability to accurately predict service lives of fiber-cement materials and our ability to select materials for fiber-cement composites which are expected to exhibit good performance in exposures where moisture fluctuations are expected. A comprehensive research plan is necessary to fully understand the implications of fiber swelling/shrinking on the fiber-cement composite system - the changes that occur in the fiber, surrounding brittle matrix, and the performance of the composite as a whole. The objective of the integrated research project, to be undertaken by a research team composed of concrete technologists from Civil Engineering and paper physicists from Paper Science and Technology, is to link changes that occur on a microstructural level as a result of cyclical moisture changes to the changes in macroscale mechanical properties of the fiber-cement composite. The goals of the proposed research are (1) to assess the effects of repeated wetting and drying (rain and heat) cycles on dimensional changes of wood fibers, physical bonding at the fiber/cement paste interface, and bond strength between the fiber and matrix and (2) to assess if improved bonding can be produced through tailoring the fiber processing for this application. The proposal includes preparation of special aligned fiber cement-composites that will offer improved opportunities for both qualitative and quantitative microstructural analysis.

路径：一项综合程序，用于检查湿/干循环对纤维水泥复合材料的纤维水泥复合效应的水分相关性能以及损伤的最终机制，这并不是进行广泛的系统检查的主题。缺乏基本知识限制了我们准确预测纤维水泥材料的使用寿命的能力，以及我们为纤维水泥复合材料选择材料的能力，这些材料预计在预计水分波动的情况下表现出良好的性能。 必须进行全面的研究计划，以充分了解纤维肿胀/收缩对纤维水泥复合系统的影响 - 纤维中发生的变化，周围的脆性矩阵以及整个复合材料的性能。综合研究项目的目的是由由纸质科学和技术的土木工程技术人员和纸质物理学家组成的研究团队进行的，是将由于周期性水分的变化与纤维水泥复合纤维结合复合物的宏观机械性能的变化而发生的变化联系起来。拟议的研究的目标是（1）评估反复润湿和干燥（雨水）循环对木纤维尺寸变化的影响，纤维/水泥糊界面处的物理粘结以及纤维和矩阵和（2）之间的粘结强度，以评估是否可以通过削减纤维来评估该应用程序的纤维来评估该应用程序的纤维。该提案包括准备特殊的对齐纤维水泥 - 复合材料，这些材料将为定性和定量微观结构分析提供改进的机会。