Simultaneous heat and moisture transfer in concrete with time-dependent boundary conditions
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All buildings and infrastructure are derived from materials that achieve functional performance. Attainment and retention of performance are important factors and depend upon understanding how materials achieve their various characteristics. In this regard, concrete, being the world’s most widely used construction material, has a rightful claim when it comes to academe, research and practice.
At a time when energy concerns and sustainability issues are high on international agendas, the role of concrete is paramount. Concrete’s versatility and global availability make it the world’s first choice in many applications, both onshore, offshore, above and below ground. It is also unique, being the only cold, mouldable, inorganic plastic that can be used on a significant engineering scale.
However, for concrete and other cementitious derivatives to be developed further, we need to understand the use of alternative hydraulically active materials used in combination with plain Portland Cement, sustainability and durability issues. Both fundamental and best practice issues need to be addressed.
Magazine of Concrete Research covers every aspect of concrete manufacture and behaviour from performance and evaluation of constituent materials to mix design, testing, durability, structural analysis and composite construction.
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Temperature and moisture are responsible for the deterioration processes of concrete structures and the extensive failures in concrete elements often result from both thermal and moisture loads. Heat and moisture transfer in concrete with time-dependent boundary conditions was investigated by numerical simulation using the Coupling Temperature and Moisture Simulation System for Concrete (CTMSoft). The temperature and moisture distribution in concrete were numerically simulated through solving the coupling transfer equations based on heat and moisture transfer in porous media by analytical method inolving Laplace transformation and transfer function. The hygro-thermal induced by the moisture and temperature changes in concrete are analysed using CTMSoft. The comparison between the numerical and experimental (or Fiber Bragg Grating monitoring data) suggests that the numerical model can be used accurately to predict the deformation resulting from the simultaneous heat and moisture transfer.
- Document Type: Research Article
- DOI: 10.1680/macr.2008.00021
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