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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Inverse Estimation of Thermal Properties of Concrete During Hydrating Process
At early ages, thermal stresses that develop as a consequence of cement hydration can cause the evolving concrete tensile strength to be reached and cracks to appear. A technique to recover the internal heat source and the thermophysical properties (specific heat and thermal conductivity) during hydration process of both normal strength concrete and high-performance concrete is presented in order to solve the direct heat transfer problem of concrete structures. Composite and pozzolanic binder were used. From experimental data, an inverse algorithm was implemented to obtain these parameters, the evolution of Young's modulus was obtained through a maturity model, and both were combined with the finite element method. The goal is to provide a numerical tool consisting of the use of the inverse method to estimate the thermophysical properties of the material during early stages of hydration. The result provides a good approximation to the experimental data. It is concluded that the proposed method is accurate, stable, and efficient for the analysis of early-ages concrete behavior.
Inverse Estimation of Thermal Properties of Concrete During Hydrating Process
At early ages, thermal stresses that develop as a consequence of cement hydration can cause the evolving concrete tensile strength to be reached and cracks to appear. A technique to recover the internal heat source and the thermophysical properties (specific heat and thermal conductivity) during hydration process of both normal strength concrete and high-performance concrete is presented in order to solve the direct heat transfer problem of concrete structures. Composite and pozzolanic binder were used. From experimental data, an inverse algorithm was implemented to obtain these parameters, the evolution of Young's modulus was obtained through a maturity model, and both were combined with the finite element method. The goal is to provide a numerical tool consisting of the use of the inverse method to estimate the thermophysical properties of the material during early stages of hydration. The result provides a good approximation to the experimental data. It is concluded that the proposed method is accurate, stable, and efficient for the analysis of early-ages concrete behavior.
Inverse Estimation of Thermal Properties of Concrete During Hydrating Process
Quintana, Osvaldo D. (Autor:in) / Aquino, Antonio (Autor:in) / Löpez, Rubén (Autor:in) / Désir, Jean Marie (Autor:in) / Campello, Eduardo M. B. (Autor:in)
Ninth International Conference on Creep, Shrinkage, and Durability Mechanics (CONCREEP-9) ; 2013 ; Cambridge, Massachusetts, United States
23.09.2013
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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