Influence of the distribution of expansive sites in aggregates on microscopic damage caused by alkali-silica reaction: Insights into the mechanical origin of expansion

Miura, Taito; Multon, Stéphane; Kawabata, Yuichiro

doi:10.1016/j.cemconres.2021.106355

Cited by 31 publications

(14 citation statements)

References 41 publications

(92 reference statements)

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“…Based on the relationship between the quantitative void and crack content in the aggregate at microscopic and the mechanical measurements at macroscopic revealed by Haha et al [81], Dunant and Scrivener [84] proposed a model that is able to predict the mechanical degradation of concrete induced by ASR cracking inside the aggregate. Both typical cracking patterns inside aggregate or in ITZ have been considered as a basis in the models of Iskhakov et al [85] and Miura et al [86]. In the work of Iskhakov et al [85], the ASR induced microcrack growth in and around the aggregate is firstly modeled.…”

Section: Application Of the Modelmentioning

confidence: 99%

A 3D reactive transport model for simulation of the chemical reaction process of ASR at microscale

Qiu

Chen

et al. 2022

Cement and Concrete Research

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Section: Application Of the Modelmentioning

confidence: 99%

A 3D reactive transport model for simulation of the chemical reaction process of ASR at microscale

Qiu

Chen

et al. 2022

Cement and Concrete Research

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“…Cuba et al [ 29 ] developed a finite element model to examine the influence of gel pockets to the mechanical properties of concrete, and found that the density of the gel is the most important factor, instead of the material properties. Miura et al [ 30 ] developed a three-dimensional model to investigate the effect of the expansive site position on AAR-effect cracking propagation and interior stress distribution. Qiu et al proposed a method to imitate the microstructure of AAR based on relevant images [ 31 ], and advanced a 3D reactive transport mesoscopic model based on thermodynamic and kinetic theory to simulate the chemical reaction process [ 32 ].…”

Section: Introductionmentioning

confidence: 99%

Mesoscale Modeling Study on Mechanical Deterioration of Alkali–Aggregate Reaction-Affected Concrete

Wang

et al. 2022

Materials

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The alkali–aggregate reaction (AAR) is a harmful chemical reaction that reduces the mechanical properties and weakens the durability of concrete. Different types of activated aggregates may result in various AAR modes, which affect the mechanical deterioration of concrete. In this paper, the aggregate expansion model and the gel pocket model are considered to represent the two well-recognized AAR modes. The mesoscale particle model of concrete was presented to model the AAR expansion process and the splitting tensile behavior of AAR-affected concrete. The numerical results show that different AAR modes have a great influence on the development of AAR in terms of expansion and microcracks and the deterioration of concrete specimens. The AAR mode of the gel pocket model causes slight expansion, but generates microcracks in the concrete at the early stage of AAR. This means there is difficulty in achieving early warning and timely maintenance of AAR-affected concrete structures based on the monitoring expansion. Compared with the aggregate expansion model, more severe cracking can be observed, and a greater loss of tensile strength is achieved at the same AAR expansion in the gel pocket model. AAR modes determine the subsequent reaction process and deterioration, and thus, it is necessary to develop effective detection methods and standards for large concrete projects according to different reactive aggregates.

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“…It will be beneficial to model these expansion behaviors when coupled with the chemical reaction. In recent years, many chemo-mechanical models for micro-to mesoscopic ASR expansion have been developed (11)(12)(13)(14)(15)(16)(17)(18)(19). In the model by Dunant (11), expansion pressure comes from a phase change of the reactive silica from a dense and stiff mineral to a less dense and softer gel under confined conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Microcracks induced by the swelling of the ASR gel originate from the aggregate and extend to the cement paste. The crack patterns in the aggregate, such as onion skin and sharp cracks (20), are strongly dependent on the reactive rock type (19), and the random distribution of the expansion sites in the aggregate. The resulting damage to the microstructure alters mechanical response to expansion pressure (11)(12).…”

Section: Introductionmentioning

confidence: 99%

Effects of temperature on expansion of concrete due to the alkali-silica reaction: A simplified numerical approach

et al. 2022

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The effects of temperature on the expansion behavior of concrete due to the alkali-silica reaction (ASR) were assessed through a simplified numerical analysis. Numerical models were constructed based on findings from a literature review. A simplified damage model was implemented to capture interactions between the viscoelasticity of the ASR gel and microstructural damage of the aggregate and paste. The parameters of the damage model were identified by fitting the simulated results to the experimental data. The results indicate that for a given reaction ratio, expansion ability is reduced at higher temperatures during the early and late stages of expansion. The results demonstrate that explicit modeling of chemo-mechanical interactions is important to achieve accurate numerical predictions of expansion behavior.

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Influence of the distribution of expansive sites in aggregates on microscopic damage caused by alkali-silica reaction: Insights into the mechanical origin of expansion

Cited by 31 publications

References 41 publications

A 3D reactive transport model for simulation of the chemical reaction process of ASR at microscale

A 3D reactive transport model for simulation of the chemical reaction process of ASR at microscale

Mesoscale Modeling Study on Mechanical Deterioration of Alkali–Aggregate Reaction-Affected Concrete

Effects of temperature on expansion of concrete due to the alkali-silica reaction: A simplified numerical approach

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