Ice abrasion and impact resistance of concrete under arctic conditions

北极条件下混凝土的冰磨耗及抗冲击性能

• 批准号: 499172-2016
• 负责人: Hassan, Assem
• 金额: $ 8.8万
• 依托单位: Memorial University of Newfoundland
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=696627
• 关键词: Ice; abrasion; impact; resistance; concrete

Bridge piers, lighthouses, and oil platforms, especially those in Arctic and subarctic areas, are exposed to harsh environmental conditions such as ice abrasion and ice impact loading. Ice abrasion occurs when a drifting ice sheet slides against the surface of the structure with high friction. On the other hand, drifting ice sheets or icebergs can create considerable dynamic impact loads on offshore structures. These impact loads can be even more damaging when borne by strong currents. Continuous ice abrasion and/or ice impact loading are considered one of the most dangerous deterioration of concrete structures. Unfortunately, there are still a number of unknown factors related to design and material selection of concrete structures exposed to ice abrasion. Moreover, the information regarding the effect of ice impact loading on concrete structures is limited in the literature. The main objective of this project is to investigate ice abrasion and impact resistance of concrete under arctic conditions. The project particularly aims to study the effects of actual Arctic environmental conditions on concrete in order to develop some novel concrete mixtures with high resistance to ice abrasion and ice impact loading. The effects of mixture composition, mixture proportions, supplementary cementing materials, and the inclusion of crumb rubber/fibres on ice abrasion and impact loading will be clearly presented to help designers/engineers in designing and optimizing concrete mixtures in arctic conditions. Other considerations such as effects concrete curing and surface finishing techniques on the abrasion and impact resistance will also be part of this project. The outcome of this project will have a significant potential to create new technology and subsequent opportunities for next generation of concrete design guidelines for arctic conditions.

桥梁，灯塔和油平台，尤其是北极和亚北极地区的桥梁，暴露于苛刻的地方 环境条件，例如冰块和冰撞击负荷。冰擦冰 板块朝着结构表面上的摩擦高摩擦。另一方面，漂移冰盖或 冰山可以在海上结构上产生相当大的动态冲击负荷。这些影响负载甚至可以是 当通过强电流承受时，更具破坏性。连续的冰磨损和/或冰撞击负荷是 被认为是混凝土结构最危险的恶化之一。不幸的是，仍然有一个 与冰的混凝土结构的设计和材料选择有关的未知因素的数量 磨损。此外，有关冰撞击负荷对混凝土结构的影响的信息有限 在文献中。该项目的主要目的是研究冰磨损和影响 北极条件下的混凝土。该项目尤其旨在研究实际北极的影响 混凝土上的环境条件，以开发一些具有高抗性的新型混凝土混合物 冰磨损和冰撞击负荷。混合物组成，混合比例，补充的影响 胶结材料，以及将面包屑/纤维纳入冰磨损和撞击负荷将是 明确提出的旨在帮助设计师/工程师设计和优化北极混凝土混合物 状况。其他考虑因素，例如效果混凝土固化和表面饰面技术 磨损和影响力也将成为该项目的一部分。该项目的结果将有一个 创造新技术和随后的下一代混凝土的巨大潜力 北极条件的设计指南。