Thermal induced stress and associated cracking in cement-based composite at elevated temperatures––Part I: Thermal cracking around single inclusion

Fu, Y.F.; Wong, Yi Lin; Tang, Chun An; Poon, Chi Sun

doi:10.1016/s0958-9465(03)00086-6

Cited by 93 publications

(36 citation statements)

References 7 publications

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“…4). Considering a single inclusion in a matrix, numerical simulation 5 shows that in such a case (CTE A < CTE P ), most of the damage will occur at the ITZ. Considering the spatial distribution of aggregates, numerical simulation 6 shows that depending on the spatial arrangement, on the shape and on the size distribution of aggregates, a complex thermo mechanical interplay between them occurs.…”

Section: Introductionmentioning

confidence: 99%

Quantitative linear and nonlinear resonance inspection techniques and analysis for material characterization: Application to concrete thermal damage

Payan

Ulrich

Bas

et al. 2014

The Journal of the Acoustical Society of America

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Developed in the late 1980s, Nonlinear Resonant Ultrasound Spectroscopy (NRUS) has been widely employed in the field of material characterization. Most of the studies assume the measured amplitude to be proportional to the strain amplitude which drives nonlinear phenomena. In 1D resonant bar experiments, the configuration for which NRUS was initially developed, this assumption holds. However, it is not true for samples of general shape which exhibit several resonance mode shapes. This paper proposes a methodology based on linear resonant ultrasound spectroscopy, numerical simulations and nonlinear resonant ultrasound spectroscopy to provide quantitative values of nonlinear elastic moduli taking into account the 3D nature of the samples. In the context of license renewal in the field of nuclear energy, this study aims at providing some quantitative information related to the degree of micro-cracking of concrete and cement based materials in the presence of thermal damage. The resonance based method is validated as regard with concrete microstructure evolution during thermal exposure.

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Section: Introductionmentioning

confidence: 99%

Quantitative linear and nonlinear resonance inspection techniques and analysis for material characterization: Application to concrete thermal damage

Payan

Ulrich

Bas

et al. 2014

The Journal of the Acoustical Society of America

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“…Owing to the existence of those radical mesocracks, the concrete strength presents an obvious decrease after 500 • C. In this study, it was found that the CTE of limestone aggregate is bigger than that of mortar at 520 • C, which becomes the basic reason of the initiation of the radical mesocrack. According to numerical simulations by Fu et al the radical mesocrack initiates at 430 • C and propagates with the further heating [19]. The simulated and experimental results also indicated that the main regions with radical mesocracks concentrate on some shape edges of aggregates and in-between of aggregates [12,18].…”

Section: Mesocracking Manifestationmentioning

confidence: 99%

Temperature dependence of thermal induced mesocracks around limestone aggregate in normal concrete

Xuan

Shui

2009

Fire and Materials

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SUMMARYThis paper presents the results of thermal expansion measurements of mortar and limestone aggregate and thermal induced mesocracks around limestone aggregate in normal concrete exposed to high temperature, up to 800 • C. The former was measured by a fused silica Workhorse Dilatometer. The later was observed by the viewfinder of Polarizing Optical Microscope. The results showed that the difference in coefficient of thermal expansion between mortar and limestone exhibited the temperature dependence. Thermal induced tensile stress around limestone aggregate first took place, following the hydrostatic compression under higher temperature. During the whole heating process, the tangential, radical and linkage mesocracks in concrete gradually initiated and propagated for the response of thermal induced stress around limestone aggregate.

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“…Thermally-induced damage in cement-based composites was first thermo-mechanically modeled at the mesoscale by Fu et al to capture cracking around a single heterogeneity [12] or multiple heterogeneities [13]. The authors studied the influence of the heterogeneous constituents' coefficients of thermal expansion, size scale, and spatial distribution on stresses and cracking.…”

Section: Introductionmentioning

confidence: 99%

Multi-Physics Modeling of Fire-Induced Damage in High-Performance Concrete

Lammi¹,

Zhou²

2014

The International Journal of Multiphysics

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Thermal induced stress and associated cracking in cement-based composite at elevated temperatures––Part I: Thermal cracking around single inclusion

Cited by 93 publications

References 7 publications

Quantitative linear and nonlinear resonance inspection techniques and analysis for material characterization: Application to concrete thermal damage

Quantitative linear and nonlinear resonance inspection techniques and analysis for material characterization: Application to concrete thermal damage

Temperature dependence of thermal induced mesocracks around limestone aggregate in normal concrete

Multi-Physics Modeling of Fire-Induced Damage in High-Performance Concrete

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