Print Email Facebook Twitter Numerical analysis of calcium leaching on the durability of dam concrete Part of: 4th International Rilem Conference on Microstructure Related Durability of Cementitious Composites· list the conference papers Title Numerical analysis of calcium leaching on the durability of dam concrete Author Nie, Ding (China Institute of Water Resources and Hydropower Research, China) Shang, Feng (China Institute of Water Resources and Hydropower Research, China) Han, Xun (Nanjing Hydraulic Research Institute, China) Date 2021-04-29 Abstract Concrete dams are subjected to soft water penetration of a high water head during their long service lives. Degradation due to calcium leaching will decrease the durability of the concrete and affect dam safety. The long-term performance of concrete dams due to calcium leaching should be evaluated and predicted accurately to complete the reinforcement work in a timely manner, ensuring long-term safety of concrete dam. In this paper, sediments and seepage water from corridors of a concrete dam located in southeastern China were first collected on-site. The components of the sediments and seepage water were detected by X-ray photoelectron spectroscopy, scanning electron microscopy and inductively coupled plasma mass spectrometry. Through a comprehensive analysis of the components, a certain degree of calcium leaching was found in the concrete inside the dam. In order to predict the long-term degradation of concrete, a multi-scale model of calcium leaching considering the micro-pore structure of cement hydrates was used and finite element analysis were carried out to simulate the durability of dam concrete. The simulated results using the calcium leaching model showed a good agreement with the experiments. Finally, the long-term durability of the dam concrete was predicted. It implies that the proposed method could provide calculation and theoretical basis for the durability analysis of concrete dams due to long period calcium leaching. Subject dam precipitate detectionconcretecalcium leachingmulti-scale modelnumerical analysis To reference this document use: http://resolver.tudelft.nl/uuid:e8b659aa-79bd-4569-a264-c75b4fca111f Part of collection Conference proceedings Document type conference paper Rights (c) 2021 the authors Files PDF Numerical analysis of cal ... ncrete.pdf 1.06 MB Close viewer /islandora/object/uuid:e8b659aa-79bd-4569-a264-c75b4fca111f/datastream/OBJ/view