A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Relationship of LDPM meso-scale parameters and aging for normal and high strength concretes
https://orcid.org/http://orcid.org/0000-0003-3616-5694
To assure high safety levels and functionality over the lifespan of concrete structures (50–100 years), it is important to understand the material’s behavior. As widely known, concrete changes its performance over time typically leading to enhanced material properties if deterioration mechanisms are neglected (e.g. Alkali-Silica Reaction). This contribution considers merely the former aspect of enhanced material properties. The source of the so-called concrete aging is the ongoing hydration of the cement paste, which depends on the environmental conditions and the mix design. Consequently, it is crucial to understand the evolution of concrete properties as a function of the reaction degree. In this contribution, the previous established age-dependent lattice discrete particle model developed by Wan et al. for UHPC is applied to normal and high strength concretes. This model consists of a multi-physics model solving the relevant heat and moisture transport mechanisms as well as the chemical reactions and a discrete particle model which simulates concrete at the meso-scale. These two components are coupled by a set of aging functions, mapping the reaction degree to the meso-scale parameters. The framework is applied to an extensive data-set, including test data of concretes with various compositions and ages between 1 day and 155 days. The experimental data include calorimetric and shrinkage tests, measurements of internal humidity and temperature as well as different kinds of mechanical tests. The framework captures the experimental data well with minor changes in the aging laws. Furthermore, the results indicate a strong dependence of the aging parameters on the cement type.
Relationship of LDPM meso-scale parameters and aging for normal and high strength concretes
https://orcid.org/http://orcid.org/0000-0003-3616-5694
To assure high safety levels and functionality over the lifespan of concrete structures (50–100 years), it is important to understand the material’s behavior. As widely known, concrete changes its performance over time typically leading to enhanced material properties if deterioration mechanisms are neglected (e.g. Alkali-Silica Reaction). This contribution considers merely the former aspect of enhanced material properties. The source of the so-called concrete aging is the ongoing hydration of the cement paste, which depends on the environmental conditions and the mix design. Consequently, it is crucial to understand the evolution of concrete properties as a function of the reaction degree. In this contribution, the previous established age-dependent lattice discrete particle model developed by Wan et al. for UHPC is applied to normal and high strength concretes. This model consists of a multi-physics model solving the relevant heat and moisture transport mechanisms as well as the chemical reactions and a discrete particle model which simulates concrete at the meso-scale. These two components are coupled by a set of aging functions, mapping the reaction degree to the meso-scale parameters. The framework is applied to an extensive data-set, including test data of concretes with various compositions and ages between 1 day and 155 days. The experimental data include calorimetric and shrinkage tests, measurements of internal humidity and temperature as well as different kinds of mechanical tests. The framework captures the experimental data well with minor changes in the aging laws. Furthermore, the results indicate a strong dependence of the aging parameters on the cement type.
Relationship of LDPM meso-scale parameters and aging for normal and high strength concretes
https://orcid.org/http://orcid.org/0000-0003-3616-5694
To assure high safety levels and functionality over the lifespan of concrete structures (50–100 years), it is important to understand the material’s behavior. As widely known, concrete changes its performance over time typically leading to enhanced material properties if deterioration mechanisms are neglected (e.g. Alkali-Silica Reaction). This contribution considers merely the former aspect of enhanced material properties. The source of the so-called concrete aging is the ongoing hydration of the cement paste, which depends on the environmental conditions and the mix design. Consequently, it is crucial to understand the evolution of concrete properties as a function of the reaction degree. In this contribution, the previous established age-dependent lattice discrete particle model developed by Wan et al. for UHPC is applied to normal and high strength concretes. This model consists of a multi-physics model solving the relevant heat and moisture transport mechanisms as well as the chemical reactions and a discrete particle model which simulates concrete at the meso-scale. These two components are coupled by a set of aging functions, mapping the reaction degree to the meso-scale parameters. The framework is applied to an extensive data-set, including test data of concretes with various compositions and ages between 1 day and 155 days. The experimental data include calorimetric and shrinkage tests, measurements of internal humidity and temperature as well as different kinds of mechanical tests. The framework captures the experimental data well with minor changes in the aging laws. Furthermore, the results indicate a strong dependence of the aging parameters on the cement type.
Relationship of LDPM meso-scale parameters and aging for normal and high strength concretes
Mater Struct
Sinn, Lisa-Marie (author) / Boumakis, Ioannis (author) / Ninčević, Krešimir (author) / Vorel, Jan (author) / Wan-Wendner, Roman (author)
2022-10-01
Article (Journal)
Electronic Resource
English
Relationship of LDPM meso-scale parameters and aging for normal and high strength concretes
| Online Contents | 2022
Cracking Sensitivity of Normal- and High-Strength Concretes
| British Library Online Contents | 2009
Cracking Sensitivity of Normal- and High-Strength Concretes
| Online Contents | 2009