Lattice Discrete Particle Modeling (LDPM) of Alkali Silica Reaction (ASR) deterioration of concrete structures

Alnaggar, Mohammed; Cusatis, Gianluca; Luzio, Giovanni Di

doi:10.1016/j.cemconcomp.2013.04.015

Cited by 159 publications

(85 citation statements)

References 55 publications

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“…Several experimental and numerical studies show that the type of applied stress state, particularly the ratio of various components of applied stress, has a large effect on the ASR-induced expansion in various directions (Ahmed et al 1999;Alnaggar et al 2013;Gravel et al 2000;Larive et al 1996;Multon and Toutlemonde 2006). However, the effect on the volume expansion of concrete is minimal.…”

Section: Effect Of Various Loading Conditions On Asr-induced Expansionmentioning

confidence: 99%

Diffusion-Controlled and Creep-Mitigated ASR Damage via Microplane Model. II: Material Degradation, Drying, and Verification

2017

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Abstract:The theory for the material and structural damage due to the alkali-silica reaction (ASR) in concrete is calibrated and validated by finite element fitting of the main test results from the literature. The fracture mechanics aspects, and particularly the localization limiter, are handled by the crack band model. It is shown that the theory can capture the following features quite well: (1) the effects of various loading conditions and stress states on the ASR-induced expansion and its direction; (2) degradation of the mechanical properties of concrete, particularly its tensile and compressive strength, and elastic modulus; (3) the effect of temperature on ASR-induced expansion; and (4) the effect of drying on the ASR, with or without simultaneous temperature effect. The finite element simulations use microplane model M7. The aging creep, embedded in M7, is found to mitigate the predicted ASR damage significantly. The crack band model is used to handle quasi-brittle fracture mechanics and serve as the localization limiter. The moisture diffusivity, both the global one for external drying and the local one for mortar near the aggregate, decreases by one to two orders of magnitude as the pore humidity drops. The fits of each experimenter's data use the same material parameters. Close fits are achieved and the model appears ready for predicting the ASR effects in large structures.

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Section: Effect Of Various Loading Conditions On Asr-induced Expansionmentioning

confidence: 99%

Diffusion-Controlled and Creep-Mitigated ASR Damage via Microplane Model. II: Material Degradation, Drying, and Verification

2017

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Section: Background and Significancementioning

confidence: 99%

“…The study of the chemical process which leads to the swelling of the gel and the expansion of concrete was the focus of the last two decades. Model based on the diffusion and reaction of the ions were first developed in a mathematical framework (Bažant and Steffens, 2000;Suwito et al, 2002;Liuaudat et al, 2014) and subsequently implemented in finite element software to describe the mechanical impact (Poyet et al, 2007;Multon et al, 2009;Sanchez et al, 2014;Alnaggar et al, 2013).To understand the evolution of ASR in concrete and its degradation impact on the material, in this paper a multiscale material model is proposed.The model ranges from the aggregate level (also known as meso level) to the concrete level. It is a pressure-based model, based on the microporomechanics theory developed by Dormieux et al (2006).…”

mentioning

confidence: 99%

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

Esposito

Hendriks

2016

Cement and Concrete Composites

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“…Such a framework is also quintessential for the scientific investigation of time-dependent processes such as creep, shrinkage [11,6,7], and ASR [8] which are affected by spatial gradients in material properties. In this paper, the authors discuss in depth the evolution of fracture properties by the example of a chosen UHPC, the choice of a suitable parameter for the formulation of fracture related aging laws, and the age-dependence of size effect.…”

Section: Introductionmentioning

confidence: 99%

Age-dependent size effect and fracture characteristics of ultra-high performance concrete

Wan-Wendner

Wan‐Wendner

Cusatis

2018

Cement and Concrete Composites

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Abstract:This paper presents an investigation of the age-dependent size effect and fracture characteristics of an ultra high performance concrete (UHPC). The study is based on a unique set of experimental data connecting aging tests for two curing protocols of one size and scaled size effect tests of one age. Both aging and size effect studies are performed on notched three point bending tests. Experimental data is augmented by state of the art simulations employing a recently developed discrete element based early-age computational framework.

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Lattice Discrete Particle Modeling (LDPM) of Alkali Silica Reaction (ASR) deterioration of concrete structures

Cited by 159 publications

References 55 publications

Diffusion-Controlled and Creep-Mitigated ASR Damage via Microplane Model. II: Material Degradation, Drying, and Verification

Diffusion-Controlled and Creep-Mitigated ASR Damage via Microplane Model. II: Material Degradation, Drying, and Verification

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

Age-dependent size effect and fracture characteristics of ultra-high performance concrete

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