Experiment-based development of an engineering model to describe frost attack on future-oriented concretes

基于实验的工程模型开发，用于描述面向未来的混凝土的霜冻侵蚀

• 批准号: 505859222
• 负责人: Professor Dr.-Ing. Frank Dehn
• 金额: --
• 依托单位: F. A. Finger-Institut für Baustoffkunde
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/505859222?language=en
• 关键词: Experiment; based; development; engineering; model

Frost attack continues to be one of the most significant causes of damage to concrete structures. However, the descriptive design concept usually used to ensure sufficient frost resistance is increasingly reaching its limits. The use of new binders, as well as the change in climatic boundary conditions exceed the experience on which the descriptive concept is based. However, reliable, time-dependent descriptions of the damage progress are still missing for an alternative performance-based design for frost attack.Within the scope of this project, a time dependent and spatially resolved engineering model is to be developed, which will be the basis to predict frost-induced damage. In addition to classical mix designs, more innovative and sustainable concretes will be investigated in the frost test. The evaluation of frost deterioration will be expanded to include crack and porosity analyses in addition to established criteria. The test conditions shall vary in such a way that both a comparability between different test methods and a good transferability of the test results to practical conditions are achieved. The aim of this project is thus to enable a reliable service life assessment of frost-exposed concrete structures and in this way to ensure sufficient durability in the future.

霜冻仍然是混凝土结构损坏的最重要原因之一。然而，通常用于确保足够抗冻性的描述性设计概念越来越接近其极限。新粘合剂的使用以及气候边界条件的变化超出了描述性概念所依据的经验。然而，可靠的，随时间变化的描述的损害进展仍然失踪的替代性能为基础的设计为frost attacks.Within本项目的范围内，一个随时间变化的和空间分辨的工程模型，这将是预测霜冻引起的损害的基础。除了经典的配合比设计，更多的创新和可持续的混凝土将在霜冻测试中进行研究。除已建立的标准外，还将扩展霜冻恶化的评估，包括裂缝和孔隙度分析。试验条件的变化应确保不同试验方法之间的可比性和试验结果与实际条件的良好可移植性。因此，该项目的目的是对霜冻暴露的混凝土结构进行可靠的使用寿命评估，并以这种方式确保未来足够的耐久性。