Predictive tools for improving and controlling the quality and durability of concrete

用于改善和控制混凝土质量和耐久性的预测工具

• 批准号: 194375-2007
• 负责人: Chidiac, Samir
• 金额: $ 1.42万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 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=452686
• 关键词: Predictive; tools; improving; controlling; quality

New developments in concrete technology have resulted in changes in the types of concrete used in civil engineering applications as well as the performance requirements. Use of new cements and new mineral and chemical admixtures have led to the development of high performance concrete (HPC) and self-consolidating concrete (SCC). HPC and SCC present numerous advantages such as high strength, high elastic modulus, less bleeding, less creep, and high durability. For example SCC is a highly flowable concrete that can spread easily and self consolidate under its own weight without segregation. Stricter performance requirements, mainly durability, have also been imposed on these concrete to ensure longevity. At present, standard test methods have not been developed to ensure quality of the fresh concrete and its compliance with the durability and other structural requirements.

混凝土技术的新发展导致了土木工程应用中使用的混凝土类型以及性能要求的变化。新水泥、新矿物和化学外加剂的使用导致了高性能混凝土(HPC)和自固结混凝土(SCC)的发展。高性能混凝土和自密实混凝土具有许多优点，如高强度、高弹性模量、较少的渗漏、较少的蠕变和较高的耐久性。例如，SCC是一种高度流动的混凝土，可以很容易地扩散并在自身重量下自我固结，而不会出现离析。这些混凝土也被施加了更严格的性能要求，主要是耐久性，以确保寿命。目前，还没有制定标准的测试方法来确保新浇筑混凝土的质量，并确保其符合耐久性和其他结构要求。