ASR expansions in concrete under triaxial confinement

Liaudat, Joaquín; Carol, Ignacio; López, Carlos M.; Saouma, Victor E.

doi:10.1016/j.cemconcomp.2017.10.010

Cited by 44 publications

(30 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this proposed model, the heat-diffusion analysis is decoupled from mechanical analysis, and the output from preliminary thermal analysis is used as a predefined field for the next analysis including ASR and mechanical damage. The model is validated at the material scale on the basis of the recently published paper on experimental modelling of ASR considering the triaxial stress state [16]. At structural level, a finite element model is constructed for a gravity dam suffering from ASR.…”

Section: Discussionmentioning

confidence: 99%

“…However, the results from Larive [15] indicate that such phenomena do not occur in ASR, at least in the range of stresses encountered in the field. To the contrary, in a recent experimental research by Liaudat et al [16], it has been shown that a 3D state of permanent stress equal to -9.7 MPa can hinder the volumetric ASR strains. Mechanical loads also affect the fracture processes in the material, and therefore the expansion as it is, in ASR, may be strongly coupled with internal damage [17].…”

Section: Introductionmentioning

confidence: 87%

“…This assumption is considered by many researchers and experimental works demonstrated a reasonable agreement with numerical models considering volumetric strain [10,18]. In recent experiments by Liaduat et al [16], an ad-hoc device is introduced which is able to apply triaxial loads on ASR specimens for a long period. The results indicate that the ASR expansion is volumetric in free stress state tests and transfers to the less compressed direction.…”

Section: Asr Modellingmentioning

confidence: 99%

See 2 more Smart Citations

Modelling of Alkali Silica Reaction in concrete structures for rehabilitation intervention

2018

View full text Add to dashboard Cite

A number of hydraulic structures such as dams and hydro-power plants in the world and in particular, in South Africa which have been designed and built during the last decades, have been subjected to material deterioration due to Alkali Silica Reaction (ASR). ASR is a deleterious chemical reaction between the alkalis in Portland cement paste and certain amorphous silica found in various types of natural aggregates which usually results in material degradation and structural distress such as expansion of the structure, cracking, presence of gel, discoloration and pop outs of the reacting particles near the surface of the concrete. Also, suitable environmental conditions (temperature and relative humidity) play a vital role in the initiation and advancement of ASR. In this study a chemo-thermo-mechanical model is developed to predict the structural expansion, degradation of mechanical properties, cracks and damage in concrete structures affected by ASR. Parameters such as temperature, kinetics of the reaction, confining stresses and material degradation are included in the model. The finite element based model can simulate the temperature field in the structure and the kinetics of the chemical reaction to predict the long-term effects of the ASR on concrete structures including displacement, cracking and damage development. The model is applied to an actual concrete dam subjected to ASR. The results are interpreted, and support the management and evaluation of the remedial measures for repair and maintenance programmes for the affected dams.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 87%

Section: Asr Modellingmentioning

confidence: 99%

See 1 more Smart Citation

Modelling of Alkali Silica Reaction in concrete structures for rehabilitation intervention

2018

View full text Add to dashboard Cite

show abstract

“…For such multiaxial loading, the experiments in the literature show that the measured volumetric expansion decreases [56], [57]. In the model, as long as the cracking criterion (Equation 15) is not reached, the volume of cracking, , stays equal to zero and the pressure increases (Equation (1)).…”

Section: Pressure Evolution During Diffuse Crackingmentioning

confidence: 99%

“…Under anisotropic mechanical loading, expansions are anisotropic [36], [37], [43], [54]- [57]. For different natures of new phases (alkali silica gels or ettringite), a difference of 1 MPa in stress compared to the mean stress in the material is sufficient to cause anisotropic expansion [36], [38], [54], [58].…”

Section: Anisotropy Of Cracking Due To Macroscopic Stress Statementioning

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

View full text Add to dashboard Cite

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.

show abstract

Investigating the flexural behavior of ASR‐damaged RC beam through internal stress and cracking development using 3D Rigid Body Spring Model

Luo,

Nagai

2024

Structural Concrete

View full text Add to dashboard Cite

The alkali‐silica reaction (ASR) is one of the durability issues that affect the safety of concrete structures. Numerical simulation is useful for monitoring the internal condition of a reinforced concrete (RC) structure with ASR damage and predicting its long‐term behavior. Since discrete methods of simulation suit situations where concrete undergoes durability issues associated with expansion and cracking, a mesoscale discrete analysis method known as the three‐dimensional Rigid Body Spring Model (3D RBSM), as already used to simulate concrete ASR damage at the material scale, has been further developed to simulate ASR damage at the structural scale. In this development, the aggregate is not separately modeled and expansive elements are included to simulate ASR expansion, allowing a larger element size (1–2 cm). The number of elements and computation time are reduced to less than 1%. This proposed model is used to simulate ASR damage in a RC beam and the beam's residual flexural capacity. The simulation allows the internal stress and cracking condition to be visualized, leading to an explanation as to why the loading capacity of a RC beam is not affected by ASR damage: first, almost no cracks form at the core of the beam section due to the stirrup confinement, so the effective depth of the cross section is maintained after ASR damage; second, the tensile reinforcements have already yielded although ASR damage exists. Besides, the inhibited development of shear cracks may be one of the reasons for the slight improvement of flexural capacity of the damaged‐RC beam in experiment and simulation.

show abstract

ASR expansions in concrete under triaxial confinement

Cited by 44 publications

References 8 publications

Modelling of Alkali Silica Reaction in concrete structures for rehabilitation intervention

Modelling of Alkali Silica Reaction in concrete structures for rehabilitation intervention

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

Investigating the flexural behavior of ASR‐damaged RC beam through internal stress and cracking development using 3D Rigid Body Spring Model

Contact Info

Product

Resources

About