Engineered stucco with expanded perlite filler for shrinkage resistance

工程灰泥含有膨胀珍珠岩填料，可抗收缩

• 批准号: 402948-2010
• 负责人: Bindiganavile, Vivek
• 金额: $ 1.82万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2010
• 资助国家: 加拿大
• 起止时间: 2010-01-01 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=471968
• 关键词: Engineered; stucco; expanded; perlite; filler

The use of hygroscopic lightweight aggregates that maintain the relative humidity within cement based systems over time, promises tremendous potential for shrinkage resistance through internal curing in cement-based composites. The proposed study will examine lightweight stucco that contains expanded perlite specially engineered to have a diverse cell wall thickness and moisture release rate. Tests that measure shrinkage in a controlled temperature-humidity chamber will evaluate strains associated with each layer in the application of stucco. At the same time, the water absorption in the cured stucco will also be examined. The proposed study will detail improvements to the dimensional stability, rheology, thermal transport, and mechanical properties of insulating stucco. This proposal will address the use of these lightweight composites in conventional cast-in-place applications, as well as in sprayed concrete technology. In addition, it will help design new test protocols suited for the shrinkage characterization of cement-based systems.

随着时间的推移，在水泥基系统内保持相对湿度的吸湿轻质骨料的使用，通过水泥基复合材料的内部固化，有望实现抗收缩性的巨大潜力。拟议的研究将检查轻质灰泥，其中包含专门设计的膨胀的灰泥，具有不同的细胞壁厚度和水分释放速率。在控制温度-湿度的室内测量收缩率的试验将评估与灰泥应用中每层相关的应变。同时，还将检查固化灰泥中的吸水性。拟议的研究将详细改善绝缘灰泥的尺寸稳定性，流变性，热传输和机械性能。该提案将解决这些轻质复合材料在传统现浇应用中的使用，以及在喷射混凝土技术中的应用。此外，它将有助于设计适合水泥基系统收缩特性的新测试协议。