A multiscale micromechanical approach to model the deteriorating impact of alkali-silica reaction on concrete

Esposito, Rita; Hendriks, Max A.N.

doi:10.1016/j.cemconcomp.2016.03.017

Cited by 36 publications

(20 citation statements)

References 35 publications

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“…The modelling proposed in this paper makes the link between the two scales. Taking the shape of cracks into consideration could lead to slightly larger coefficients [26], [40]. This means that the present modelling could underestimate the percentage of expansion due to pressure and thus slightly overestimate the percentage due to cracking.…”

Section: Discussionmentioning

confidence: 88%

“…For simplicity, the Biot coefficient is evaluated in a linear context here, from the mechanical properties and volumes of inclusions (Equation (5)) without consideration of the shape of the porosity filled by the new phases. More precise quantification could be obtained by taking account of the shape of filled cracks as proposed in [26], [27], [40]. In the present work, the non-linearity due to the combination with diffuse cracking caused by pressure, creep [41] and structural damage [42] is considered differently, by resorting to damage theory [53].…”

Section: Pressure Due To the Formation Of New Phasesmentioning

confidence: 99%

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Expansion modelling based on cracking induced by the formation of new phases in concrete

Multon

Sellier

2019

International Journal of Solids and Structures

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Unexpected expansion can be a cause of damage in quasi-brittle materials such as concrete, fired clays or rocks. Such expansions can be due to chemical reactions (alkalisilica reaction-ASR, sulfate attack) or physical phenomena (frost, transport of fluids). Expansion is caused by two main mechanisms: matrix deformation due to the pressure initiated by the formation of new phases in the porosity of the material, and matrix cracking, which increases the apparent swelling of the matrix. In this work, a poromechanical model is proposed to reproduce expansion in materials resulting from single or multiple pressures. In this model, plastic deformation is used to represent permanent strain due to diffuse cracking induced by the pressure. In the case of expansion in quasi-brittle materials, the permanent deformations induced by the pressure are anisotropic to take account of the impact of the initial material anisotropy and stress anisotropy on cracking. The model is then coupled with a damage model and used to evaluate the opening of localized cracks due to a pressure gradient in a laboratory specimen.

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Section: Discussionmentioning

confidence: 88%

Section: Pressure Due To the Formation Of New Phasesmentioning

confidence: 99%

Expansion modelling based on cracking induced by the formation of new phases in concrete

Multon

Sellier

2019

International Journal of Solids and Structures

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“…Generally, ASR produces a gel (also called ASR gel) which is soft, viscous and expansive in nature, produced from the sodium silicate [ 90 ]. ASR gel expands in the presence of water, causing pressure inside and around the siliceous aggregate, which may result in cracking and spalling, causing deterioration in the stiffness and strength of concrete [ 91 , 92 ]. Embedded fibers have the ability to bridge the cracks in concrete, motivating several researchers to investigate the ASR behavior in FRC.…”

Section: Deterioration Processes Affecting Fiber Reinforced Concrementioning

confidence: 99%

Effect of Fibers on Durability of Concrete: A Practical Review

2020

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This article reviews the literature related to the performance of fiber reinforced concrete (FRC) in the context of the durability of concrete infrastructures. The durability of a concrete infrastructure is defined by its ability to sustain reliable levels of serviceability and structural integrity in environmental exposure which may be harsh without any major need for repair intervention throughout the design service life. Conventional concrete has relatively low tensile capacity and ductility, and thus is susceptible to cracking. Cracks are considered to be pathways for gases, liquids, and deleterious solutes entering the concrete, which lead to the early onset of deterioration processes in the concrete or reinforcing steel. Chloride aqueous solution may reach the embedded steel quickly after cracked regions are exposed to de-icing salt or spray in coastal regions, which de-passivates the protective film, whereby corrosion initiation occurs decades earlier than when chlorides would have to gradually ingress uncracked concrete covering the steel in the absence of cracks. Appropriate inclusion of steel or non-metallic fibers has been proven to increase both the tensile capacity and ductility of FRC. Many researchers have investigated durability enhancement by use of FRC. This paper reviews substantial evidence that the improved tensile characteristics of FRC used to construct infrastructure, improve its durability through mainly the fiber bridging and control of cracks. The evidence is based on both reported laboratory investigations under controlled conditions and the monitored performance of actual infrastructure constructed of FRC. The paper aims to help design engineers towards considering the use of FRC in real-life concrete infrastructures appropriately and more confidently.

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“…Inclusion of nano particle in concrete can lead to new rheological properties. Nano silica replacement can develop mechanical and a durability property of concrete and makes compact microstructure and thereby increases permeability characteristics [25,27]. The prime objective of this research is to study importance of using nano silica as replacement for cementitious materials in conventional concrete and this paper presents the mechanical and flexural properties of high performance concrete containing Nano silica.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Flexural Behavior of High Performance Concrete Containing Nano Silica

Sridhar¹,

Vivek²,

Jegatheeswaran³

2019

IJEAT

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This research work presents the role of nano silica (NS) on properties of high performance concrete. This study evaluates the influence of nano silica in three percentages (1%, 2%, 3 %,) by weight of cement. Several tests including mechanical properties and flexural test were performed to understand the influence of nano silica on behavior of concrete. It was determined that Portland cement replaced with 3% by weight with nano silica could accelerate C-S-H gel structure at early stage of hydration. In return this increases water permeability resistance of concrete specimens and acts as filler material that enhances micro structure as well as activator to promote pozzolanic activity and this will pave the way for producing good quality concrete

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A multiscale micromechanical approach to model the deteriorating impact of alkali-silica reaction on concrete

Cited by 36 publications

References 35 publications

Expansion modelling based on cracking induced by the formation of new phases in concrete

Expansion modelling based on cracking induced by the formation of new phases in concrete

Effect of Fibers on Durability of Concrete: A Practical Review

Mechanical and Flexural Behavior of High Performance Concrete Containing Nano Silica

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