Durability of Lightweight Concrete Containing Stalite Aggregate

斯坦泰克一直在尝试开发一些适合寒冷地区的高性能轻质混凝土混合料，以便为他们的客户提供耐用的轻质混凝土解决方案，以满足海上结构物的潜在应用。然而，尽管该公司在优化不同的轻质混合料方面进行了试验，但关于轻质混凝土的耐久性仍然存在悬而未决的问题，特别是在经历了含除冰盐的冻结和解冻循环之后。本项目的主要目标是开发一些轻质混合料，其中含有优化的强度和耐久性的Stalite骨料。该项目特别注重所开发的混合物的耐冻性，以及用除冰盐解冻的耐久性。这些混合料将使用不同的粘结剂含量、不同比例的轻质Stalite骨料和不同的辅助胶凝材料来设计。测试程序将包括评估新鲜性能、机械性能(压缩、拉伸和弯曲强度)以及在除冰盐存在下的抗冻融性。该项目的成果将增强斯坦泰克研发团队的知识和专业技能，特别是在轻质混凝土技术方面。此外，这一合作将在增加项目和扩大业务方面带来公司的潜在增长，从而使加拿大经济受益。

Stantec has attempted to develop some high performance lightweight concrete mixtures, suitable for cold regions, in order to provide their customers with durable lightweight concrete solutions for potential applications in offshore structures. However, despite the company's trials in optimizing different lightweight mixtures, there are still unanswered questions regarding the durability of lightweight concrete, especially after exposure to freezing and thawing cycles with de-icing salts. The main objective of this project is to develop some lightweight mixtures containing Stalite aggregate with optimized strength and durability. The project particularly focuses on the durability of the developed mixtures in term of resistance to freezing and thawing with de-icing salts. These mixtures will be designed using different binder contents, different percentages of lightweight Stalite aggregate, and different supplementary cementing materials. The test program will include the evaluation of fresh properties, mechanical properties (compressive, tensile, and flexural strengths), and freezing and thawing resistance in the presence of de-icing salts. The results of this project will lead to enhance the knowledge and expertise of the Stantec's R&D team, especially in lightweight concrete technology. In addition, this collaboration will result in a potential growth in the company in terms of additional projects and expansion of their business, thereby benefiting the Canadian economy.