Modeling of flexural strength degradation induced by alkali-silica reaction

Li, Shagang; Deng, Ziming; Li, Chousheng; Chen, Da; Zhang, Yan

doi:10.1016/j.conbuildmat.2019.117397

Cited by 6 publications

(6 citation statements)

References 39 publications

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“…The relationship between macroscopic stress Σ and strain E is written as [ 25 ]:

where

is the effective drained stiffness tensor of the RVE and B is the Biot tensor, which describes the porosity property of the RVE. The effective drained stiffness tensor

can be calculated according to the Mori–Tanaka scheme [ 32 ]:

where

is the stiffness of the solid matrix,

is the fourth-order symmetric unit tensor, and

is the Eshelby tensor of the i -th crack family.…”

Section: Description Of the Simplified Modelmentioning

confidence: 99%

A Micromechanical-Based Semi-Empirical Model for Predicting the Compressive Strength Degradation of Concrete under External Sulfate Attack

Yang

et al. 2023

Materials

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As one of the most harmful ions in the environment, sulfate could cause the deformation and material deterioration of concrete structures. Models that accurately describe the whole chemo–transport–mechanical process of an external sulfate attack (ESA) require substantial computational work and contain complex parameters. This paper proposes a semi-empirical model based on micromechanical theory for predicting the compressive strength degradation of concrete under an ESA with basic properties of the undamaged material and limited computational effort. A simplified exponential function is developed for the total amount of the invading sulfate, and a second-order equation governs the chemical reaction. A micromechanical model is implemented to solve the mechanical response caused by an ESA. The model is able to describe the compressive stress–strain behavior of concrete subject to uniaxial loading in good agreement with the experimental results. For the case of a sulfate-attacked material, the relationship between compressive strength and expansion is calculated and validated by the test results. Finally, the deterioration process of compressive strength is predicted with the test results of deformation.

show abstract

“…The relationship between macroscopic stress Σ and strain E is written as [ 25 ]:

where

is the effective drained stiffness tensor of the RVE and B is the Biot tensor, which describes the porosity property of the RVE. The effective drained stiffness tensor

can be calculated according to the Mori–Tanaka scheme [ 32 ]:

where

is the stiffness of the solid matrix,

is the fourth-order symmetric unit tensor, and

is the Eshelby tensor of the i -th crack family.…”

Section: Description Of the Simplified Modelmentioning

confidence: 99%

A Micromechanical-Based Semi-Empirical Model for Predicting the Compressive Strength Degradation of Concrete under External Sulfate Attack

Yang

et al. 2023

Materials

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“…This way, the static modulus of elasticity can be calculated as the slope of a straight-line tangent to the curve σ-ε at any point on that curve [19]. Previous researches have already reported that static modulus of elasticity of concrete is more sensitive to the effects of the internal expansion reactions than its compressive strength [3,5,9,[13][14][15]17].…”

Section: Static Modulus Of Elasticity Testsmentioning

confidence: 99%

“…Previous researches have already shown that the occurrence of ASR and DEF in concrete structures is a key factor in decreasing the material's characteristics [11][12][13][14]. A comprehensive understanding of the damage in concrete structures due to the combination of DEF and ASR effects is presented by Sanchez et al [3,5,9,14,15]. The authors reported ranges of variation in the mechanical properties of concrete related to the level of expansion induced in the investigated specimens.…”

Section: Introductionmentioning

confidence: 99%

Diagnosis and Assessment of Deep Pile Cap Foundation of a Tall Building Affected by Internal Expansion Reactions

et al. 2021

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Early deterioration of reinforced concrete foundations has been often reported in recent years. This process is usually characterized by an extensive mapping cracking process on concrete surfaces that results from several types of Internal Swelling Reaction (ISR). In this paper, a real case study of a tall reinforced concrete building with a severe deterioration process installed in its deep foundations is discussed. Laboratory tests were performed in concrete drilled cores extracted from a deep pile cap block 19 years after the beginning of construction. Tests to assess the compressive strength, the static and the dynamic modulus of elasticity, the gas permeability, and electron microscopy scanning to find out the primary mechanism responsible for the deterioration observed during in situ inspections. Chemical alterations of materials were observed in concrete cores, mainly due to Delayed Ettringite Formation (DEF), which significantly affected the integrity and durability of the structure. Dynamic modulus of elasticity showed to be a better indicator of damage induced by ISR in concrete than compressive strength. Procedures to strengthen the deteriorated elements using prestressing proved to be an efficient strategy to recover the structural integrity of pile caps deteriorated due to expansions due to ISR.

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“…ASR modelling is thus an ambiguous term as the different models found in the literature can be centred on different aspects of physics. Some numerical works focus on mechanical considerations [17][18][19][20][21][22][23][24][25], some others analyse only the chemical advancement [26][27][28][29][30][31], while a third type of works consider the combination of physico-chemical mechanisms with mechanical considerations [5,[32][33][34][35][36][37][38]. To be realistic, ASR modelling should take into account:…”

Section: Literature Reviewmentioning

confidence: 99%

“…-Mechanics [5,17,18,[20][21][22][23][24][25]32,[41][42][43]: The formation of ASR gels in hardened concrete leads to cracking and expansion. Fracture or damage mechanics is necessary to evaluate the mechanical properties after degradation.…”

Section: Literature Reviewmentioning

confidence: 99%

Sensitivity of an alkali-silica reaction kinetics model to diffusion and reactive mechanisms parameters

Mbetmi

Multon

Larrard

et al. 2021

Construction and Building Materials

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Modeling of flexural strength degradation induced by alkali-silica reaction

Cited by 6 publications

References 39 publications

A Micromechanical-Based Semi-Empirical Model for Predicting the Compressive Strength Degradation of Concrete under External Sulfate Attack

A Micromechanical-Based Semi-Empirical Model for Predicting the Compressive Strength Degradation of Concrete under External Sulfate Attack

Diagnosis and Assessment of Deep Pile Cap Foundation of a Tall Building Affected by Internal Expansion Reactions

Sensitivity of an alkali-silica reaction kinetics model to diffusion and reactive mechanisms parameters

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