Coupled chemo-mechanical deterioration of cementitious materials. Part I: Modeling

Kuhl, Detlef; Bangert, Falko; Meschke, G.

doi:10.1016/j.ijsolstr.2003.08.005

Cited by 121 publications

(60 citation statements)

References 22 publications

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“…Interestingly, in the context of cementitious materials, several chemomechanical models have been developed for describing the decalcification of solid phases due to the contact with pure water, and the consequences on mechanical parameters (e.g. [16,17]). Expansion mechanisms caused by alkali-silica reactions have also been examined by means of such approaches (see e.g.…”

Section: Introductionmentioning

confidence: 99%

Simplified coupled chemo‐mechanical modeling of cement pastes behavior subjected to combined leaching and external sulfate attack

Bary

2008

Num Anal Meth Geomechanics

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SUMMARYIn the context of radioactive waste storage, underground concrete structures may be subjected to external sulfate attack due to penetration of sulfate combined with leaching. This paper proposes a coupled chemo-mechanical modeling relying on a simplified chemical description of the solid phase composing the cement paste to address this issue. The sulfate and calcium species diffusing through the pore solution are supposed to completely control the chemical system, in particular the precipitation of gypsum and ettringite, which may lead to significant macroscopic expansions and cracking. The crystallization pressure generated by the growing crystals is introduced in the modeling through a poroelasticity analogy. Based on a representation of the cement paste of the matrix-inclusion type, the application of the Mori-Tanaka (MT) scheme provides estimates of the mechanical and diffusive properties and of the interaction coefficient as a function of the degradation state. The obtained coupled system is applied to two-dimensional numerical simulations of laboratory tests; the confrontation between experimental and computational results shows a good agreement in terms of both hydrated product evolutions as a function of time and macroscopic cracking appearance.

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Section: Introductionmentioning

confidence: 99%

Simplified coupled chemo‐mechanical modeling of cement pastes behavior subjected to combined leaching and external sulfate attack

Bary

2008

Num Anal Meth Geomechanics

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“…Herein, we focus on the chemo-mechanical damage accumulation with time. Following Bangert et al [13] and Kuhl et al [19], dam concrete is treated as an ideal mixture of pore space and skeleton in considering the degradation caused by the chemical and mechanical damage during resconstruction, f  is the normalized compressive strength of concrete against time based on ref. [20] 1 0.0805ln( ) f t    (6) and t is time in years.…”

Section: Modeling Of Chemo-mechanical Damage Of Aging Damsmentioning

confidence: 99%

“…The numerical models for coupled chemo-mechanical deterioration analysis of concrete structures, taking hygrally, thermally, and chemically induced degradation processes into account, were developed by Steffens et al [18] and Kuhl et al [19]. The said models were used by Gogoi and Maity [20] to establish the relationship between damage and age for the seismic safety assessment of aged concrete gravity dams.…”

Section: Introductionmentioning

confidence: 99%

Seismic safety of arch dams with aging effects

Wang

Feng

Zhang

2011

Sci. China Technol. Sci.

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Arch dams suffer time-varying external loadings and harsh environment that harm their physical properties. With the aging of such dams, damage accumulates and concrete degradation inevitably appears. In this paper, a model is proposed for simulating concrete degradation with aging because of chemo-mechanical damage. The seismic response of an arch dam with aging effects is analyzed using the proposed model. The results show that the damage caused by the aging of arch dams may result in an increase in tensile cantilever stresses during earthquakes. Meanwhile, the dynamic displacement and joint opening also clearly increase in comparison with those without damage. Thus, the seismic safety of arch dams is reduced by aging effects.arch dams, seismic safety, aging, damage, joint opening Citation:

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“…Physical, chemical and biological agents act together, ranging from synergistic to antagonistic, in the deterioration of stone. A considerable number of investigations have begun to examine the essential role of biological agents play in the deterioration of stone [1,[3][4][5]. The stone is susceptible to colonization by several microorganisms such as bacteria, fungi, algae, cyanobacteria and more complex organisms such as lichens and mosses responsible for a series of mechanical and chemical processes that cause the biodeterioration of the stone.…”

Section: Introductionmentioning

confidence: 99%

In Situ Investigation of the Biodeteriorative Microorganisms Lived on Stone Surfaces of the Sumela Monastery (Trabzon, Turkey)

Nuhoğlu¹,

Var²,

Koçak³

et al. 2017

J Environ Anal Toxicol

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Coupled chemo-mechanical deterioration of cementitious materials. Part I: Modeling

Cited by 121 publications

References 22 publications

Simplified coupled chemo‐mechanical modeling of cement pastes behavior subjected to combined leaching and external sulfate attack

Simplified coupled chemo‐mechanical modeling of cement pastes behavior subjected to combined leaching and external sulfate attack

Seismic safety of arch dams with aging effects

In Situ Investigation of the Biodeteriorative Microorganisms Lived on Stone Surfaces of the Sumela Monastery (Trabzon, Turkey)

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