Improved durability testing for field placed concrete and emerging cement systems

改进现场浇筑混凝土和新兴水泥系统的耐久性测试

• 批准号: 312213-2013
• 负责人: Nokken, Michelle
• 金额: $ 1.75万
• 依托单位: Concordia University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=548674
• 关键词: Improved; durability; testing; field; placed

Increasingly, concrete structures are built according to performance-based specifications. This leads to innovation in the industry as producers are able to utilize traditional materials in new ways or unconventional materials since they are no longer constrained by prescriptive requirements. The proposed program will include durability investigations of emerging cement systems; such as limestone cements, newly developed blended cements, and alkali-activated systems. Performance specifications typically consist of standardized tests performed on site-produced specimens. Non-conformance to performance measures can be traced to improper mixture delivery, but could also result from poor construction practice. As the latter is not well studied, it is planned to examine the sensitivity of current durability tests for the detection (identification) of poorly cured or consolidated concrete.

越来越多的混凝土结构是根据基于绩效的规范构建的。这导致行业的创新，因为生产商能够以新的方式或非常规材料利用传统材料，因为它们不再受规定要求的约束。拟议的计划将包括对新兴水泥系统的耐用性调查；例如石灰石水泥，新开发的混合水泥和碱激活的系统。性能规格通常包括对现场生产标本进行的标准化测试。不符合性能指标的符合性可以追溯到不当的混合物输送，但也可能是由于建筑习惯不佳而造成的。由于后者没有很好地研究，因此计划检查当前耐用性测试对固化效果不佳或固结混凝土检测（鉴定）的灵敏度。