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2024 | Book

Introduction Read chapter Read first chapter

Advanced Chemical and Creep Modeling for Alkali-Aggregate Reaction in Concrete

Authors: Fernando A. N. Silva, Rodrigo F. Roma, Mohamed K. Bourbatache, Mahfoud Tahlaiti, João M. P. Q. Delgado, António C. Azevedo

Publisher: Springer Nature Switzerland

Book Series : Building Pathology and Rehabilitation

Part of: Springer Professional "Wirtschaft+Technik" , Springer Professional "Technik" , Springer Professional "Wirtschaft"

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About this book

This book presents the numerical results of the use of the chemical model to analyse the advancement of the reaction and the mechanical model to simulate creep and shrinkage phenomena in COMSOL Multiphysics®, as a way to reassess concrete structures suffering from those mechanisms. Both models were implemented separately to evaluate their responses and compare them with the theoretical results and experimental benchmarks presented in the literature. The numerical simulation results showed excellent agreement with the experimental results data, with maximum disagreement not exceeding 10%, indicating that the implementation of the developed numerical models behaved very efficiently.

Table of Contents

Frontmatter
Chapter 1. Introduction
Abstract
The concrete is probably the most used civil construction material in the modern world. Developing countries such as China, India and Brazil stand out as the largest consumers of this material in the execution of buildings and infrastructure. The durability of concrete structures must be guaranteed in order to prevent expensive maintenance or even failure of those structures (Martin et al. in Modelling of concrete structures affected by internal swelling reactions: couplings between transfer properties, alkali leachning and expansion. Amsterdam, Netherlands, p. 8, 2012b).
Fernando A. N. Silva, Rodrigo F. Roma, Mohamed K. Bourbatache, Mahfoud Tahlaiti, João M. P. Q. Delgado, António C. Azevedo
Chapter 2. Literature Review
Abstract
For well-designed concrete structures, the main source of damage is the shrinkage, creep and expansion processes, which can act combined or not. The expansion processes are often called Internal Swelling Processes (ISP), which are pathologies that degrade the concrete structures due to the formation of an intrapore product, and its swelling is responsible for damaging the solid skeleton of concrete.
Fernando A. N. Silva, Rodrigo F. Roma, Mohamed K. Bourbatache, Mahfoud Tahlaiti, João M. P. Q. Delgado, António C. Azevedo
Chapter 3. Materials and Methods
Abstract
In this chapter is presented an explanation of the models used to analyze the chemo-mechanical behavior on AAR-affected concrete. The first part is a presentation of the rheological scheme (Grimal et al. in Swelling concrete in dams and hydraulic structures: DSC 2017, 1st edn. ISTE Ltd., Wiley, 2017) that couples all the following models presented in this chapter. The second part is dedicated to describe the chemical model proposed by Morenon (Modélisation des reactions de gonflement interne des bétons avec prise en compte des couplages poro-mécaniques et chimiques. Université Toulouse 3 Paul Sabatier, France, p. 272, 2017) which shows how the advancement of the reaction creates a volume of gel, and such volume exerts an intrapore pressure in the solid skeleton. However, in order to calculate this gel pressure, the user needs the creep and shrinkage strains, and also the diffuse cracking produced by the gel (micro-plastic strains).
Fernando A. N. Silva, Rodrigo F. Roma, Mohamed K. Bourbatache, Mahfoud Tahlaiti, João M. P. Q. Delgado, António C. Azevedo
Chapter 4. Results and Discussion
Abstract
In this chapter is presented the main simulations and the respective results of the models separately. The implementation in COMSOL was done by two different types of calibration: theoretical and experimental.
Fernando A. N. Silva, Rodrigo F. Roma, Mohamed K. Bourbatache, Mahfoud Tahlaiti, João M. P. Q. Delgado, António C. Azevedo
Chapter 5. Conclusions and Recommendations
Abstract
In this chapter is discussed the main conclusions about the results presented on the previous chapter, and also about the limitations of the work. At the end, some suggestions and perspectives are presented in order to serve as a guideline for the next works in this same subject.
Fernando A. N. Silva, Rodrigo F. Roma, Mohamed K. Bourbatache, Mahfoud Tahlaiti, João M. P. Q. Delgado, António C. Azevedo
Metadata
Title
Advanced Chemical and Creep Modeling for Alkali-Aggregate Reaction in Concrete
Authors
Fernando A. N. Silva
Rodrigo F. Roma
Mohamed K. Bourbatache
Mahfoud Tahlaiti
João M. P. Q. Delgado
António C. Azevedo
Copyright Year
2024
Electronic ISBN
978-3-031-53980-0
Print ISBN
978-3-031-53979-4
DOI
https://doi.org/10.1007/978-3-031-53980-0