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: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=618006
• 关键词: Ice; abrasion; impact; resistance; concrete

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

桥墩、灯塔和石油平台，特别是北极和亚北极地区的桥墩、灯塔和石油平台，暴露于恶劣的环境条件下，如冰磨损和冰冲击载荷。当漂流的冰与结构表面摩擦时，就会发生冰磨损。另一方面，漂流的冰盖或冰山会对海洋结构物产生相当大的动态冲击载荷。这些冲击载荷在强海流的作用下会产生更大的破坏性。连续冰磨损和/或冰冲击荷载被认为是混凝土结构最危险的破坏之一。不幸的是，仍然有许多未知因素有关的设计和材料选择暴露于冰磨损的混凝土结构。此外，有关冰冲击荷载对混凝土结构的影响的信息是有限的文献。本项目的主要目的是研究北极条件下混凝土的抗冰磨损和抗冲击性能。该项目特别旨在研究实际北极环境条件对混凝土的影响，以开发具有高抗冰磨损和冰冲击荷载的新型混凝土混合物。本文将清楚地介绍混合料组成、混合料比例、胶凝材料和橡胶粉/纤维对冰磨损和冲击载荷的影响，以帮助设计人员/工程师设计和优化北极条件下的混凝土混合料。其他考虑因素，如混凝土养护和表面处理技术对耐磨性和抗冲击性的影响，也将是本项目的一部分。该项目的成果将有很大的潜力为下一代北极条件下的混凝土设计指南创造新技术和后续机会。