Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Microstructural and multiphysics study of alkali‐silica reaction in Portland cement concrete
Alkali‐silica reaction (ASR) of Portland cement concrete involves complex chemophysical processes in the matrix of hardened concrete which could significantly shorten concrete life. A clear understanding of the ASR processes is needed to effectively control the ASR‐related problems as the vast majority of concrete used today is made of Portland cement and local aggregate materials that are often susceptible to ASR. Within this background, this work presents a numerical model to investigate ASR based on the three‐dimensional microstructure of heterogeneous concrete reconstructed using X‐ray computed‐tomography images. Finite element method was used to analyze the kinetics of ASR and the ensuing expansion of alkali‐silicate gel, based on a weak‐form governing equation that was solved using linear interpolation. The numerical results were validated using published experimental data on ASR. The validated FEM model can be useful for studying, evaluating, and predicting generic ASR‐related problems in concrete structures.
Microstructural and multiphysics study of alkali‐silica reaction in Portland cement concrete
Alkali‐silica reaction (ASR) of Portland cement concrete involves complex chemophysical processes in the matrix of hardened concrete which could significantly shorten concrete life. A clear understanding of the ASR processes is needed to effectively control the ASR‐related problems as the vast majority of concrete used today is made of Portland cement and local aggregate materials that are often susceptible to ASR. Within this background, this work presents a numerical model to investigate ASR based on the three‐dimensional microstructure of heterogeneous concrete reconstructed using X‐ray computed‐tomography images. Finite element method was used to analyze the kinetics of ASR and the ensuing expansion of alkali‐silicate gel, based on a weak‐form governing equation that was solved using linear interpolation. The numerical results were validated using published experimental data on ASR. The validated FEM model can be useful for studying, evaluating, and predicting generic ASR‐related problems in concrete structures.
Microstructural and multiphysics study of alkali‐silica reaction in Portland cement concrete
Pan, Tongyan (Autor:in) / Chen, Chi (Autor:in) / Yu, Qifeng (Autor:in)
Structural Concrete ; 19 ; 1387-1398
01.10.2018
12 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Alkali-Silica Reaction in Portland Cement Concrete - Testing Procedures and Mitigation Methods
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Alkali-Silica Reaction in Portland Cement Concrete: Testing Methods and Mitigation Alternatives
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Zeolite Crystallization in Portland Cement Concrete due to Alkali- Aggregate Reaction
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Zeolite Crystallization in Portland Cement Concrete due to Alkali- Aggregate Reaction
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Zeolite crystallization in Portland cement concrete due to alkali-aggregate reaction
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