Ice abrasion and impact resistance of concrete under 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，暴露在严酷的环境条件下，如冰磨损和冰冲击载荷。当漂移的冰盖以高摩擦力滑动到建筑物表面时，就会发生冰磨损。另一方面，漂浮的冰盖或冰山会对近海结构物产生相当大的动态冲击载荷。这些冲击载荷在强电流的作用下会造成更大的破坏。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劣化之一。不幸的是，与冰磨作用下混凝土结构的设计和选材有关的未知因素仍然很多。此外，有关冰冲击荷载对混凝土结构影响的信息在文献中也很有限。本项目的主要目标是研究北极条件下混凝土的冰磨和抗冲击性能。该项目旨在研究实际环境条件对混凝土的影响，以开发出一些具有高抗冰磨损和抗冰冲击荷载的新型混凝土混合料。将介绍混合料组成、配合比、辅助胶凝材料以及橡胶/纤维碎屑对冰磨和冲击荷载的影响，以帮助设计者和工程师在北极条件下设计和优化混凝土配合比。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，也将是该项目的一部分。该项目的成果将极有可能为北极地区的下一代混凝土设计指南创造新技术和后续机会。

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.