A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Simplified methodology to evaluate the external sulfate attack in concrete structures
The external sulfate attack is a degradation process that causes expansion and cracking in concrete structures. Due to the absence of simplified methodologies to predict the potential damage, codes specify that sulfate resistant cement should be used whenever the surrounding sulfate concentration surpasses a predefined limit. This may lead to penalizing measures as the size of the element or the mechanical properties of the concrete used are not considered. In the present work, an alternative approach is proposed. A simplified chemo-mechanical methodology is deducted to assess the potential damage in concrete elements exposed to sulfate rich environments. Equations to estimate the penetration of sulfates are derived froma numericalmodel taking into account sulfate consumption, acceleration of the penetration induced by cracking and decrease in diffusivity caused by pore filling. Failure modes associated to this phenomenon are analyzed and a set of equations to assess the risk of failure are deducted. Finally, a parametric studywith different geometries of elements and surrounding sulfate contents is performed. The results show that the criterion included in codesmight be modified depending on the characteristics of the structure. ; Peer Reviewed ; Postprint (author's final draft)
Simplified methodology to evaluate the external sulfate attack in concrete structures
The external sulfate attack is a degradation process that causes expansion and cracking in concrete structures. Due to the absence of simplified methodologies to predict the potential damage, codes specify that sulfate resistant cement should be used whenever the surrounding sulfate concentration surpasses a predefined limit. This may lead to penalizing measures as the size of the element or the mechanical properties of the concrete used are not considered. In the present work, an alternative approach is proposed. A simplified chemo-mechanical methodology is deducted to assess the potential damage in concrete elements exposed to sulfate rich environments. Equations to estimate the penetration of sulfates are derived froma numericalmodel taking into account sulfate consumption, acceleration of the penetration induced by cracking and decrease in diffusivity caused by pore filling. Failure modes associated to this phenomenon are analyzed and a set of equations to assess the risk of failure are deducted. Finally, a parametric studywith different geometries of elements and surrounding sulfate contents is performed. The results show that the criterion included in codesmight be modified depending on the characteristics of the structure. ; Peer Reviewed ; Postprint (author's final draft)
Simplified methodology to evaluate the external sulfate attack in concrete structures
Ikumi Montserrat, Tai (author) / Pialarissi Cavalaro, Sergio Henrique (author) / Segura Pérez, Ignacio (author) / Fuente Antequera, Albert de la (author) / Aguado de Cea, Antonio (author) / Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental / Universitat Politècnica de Catalunya. EC - Enginyeria de la Construcció
2016-01-01
Article (Journal)
Electronic Resource
English
DDC:
690
Degradation of Concrete Structures due to External Sulfate Attack
| British Library Conference Proceedings | 2016
Numerical assessment of external sulfate attack in concrete structures: a review
| BASE | 2019
Numerical assessment of external sulfate attack in concrete structures. A review
| British Library Online Contents | 2019