The “Chunnel” Fire. II: Analysis of Concrete Damage

Ulm, Franz‐Josef; Acker, Paul; Lévy, Michel

doi:10.1061/(asce)0733-9399(1999)125:3(283)

Cited by 124 publications

(48 citation statements)

References 2 publications

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“…However, other mechanisms may also contribute to the damage of concrete at high temperatures, such as high incompatibility of deformations between the matrix (cement paste, mortar) and aggregates [2,7]. This incompatibility of deformations, or thermal mismatch mechanism, causes a preferential cracking at the matrix-aggregate interfaces also called ''ITZ'' for Interfacial Transition Zone.…”

Section: Introductionmentioning

confidence: 99%

Tensile and shear bond strength between cement paste and aggregate subjected to high temperature

et al. 2017

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In the framework of studying the leakage rate of concrete containment of nuclear power plants during an accident, the mechanical characterization of interface between cement paste and limestone aggregate was performed with mechanical tests at the local scale, inside the laboratory of micromechanics and integrity of structures (MISt). The evolution of tensile and shear bond strength between cement paste and aggregate after heating was determined. It was revealed that the tensile bond strength was strongly affected by the temperature rise, with a decrease of about 71% at 60°C. Moreover, the shear bond strength increased almost linearly with the increase of normal stress. According to the Coulomb criterion, the cohesion and the internal friction angle were determined. These parameters decreased after heating, which indicates occurrence of thermic damage between cement paste and limestone aggregate. Finally, it appears that the tensile bond strength is more affected by the thermal damage than the shear bond strength.

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Section: Introductionmentioning

confidence: 99%

Tensile and shear bond strength between cement paste and aggregate subjected to high temperature

et al. 2017

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“…Spalling is thought to be caused by the combined effect of the buildup of pore pressure during heating due to water evaporation [4] and tensile stresses caused by the temperature-gradient across the concrete cross-section [5]. Hertz performed a comprehensive literature study of different available theories that explain the spalling phenomenon and concluded that the formation of vapour inside the concrete is the most important factor [6].…”

Section: Deterministic Model Proposed In Literaturementioning

confidence: 99%

Prediction of the spatial occurrence of fire induced spalling in concrete slabs using random fields

Coile

Criel

Caspeele

et al. 2013

MATEC Web of Conferences

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Abstract. As the loss of concrete cover can significantly influence the reliability of concrete elements during fire, spalling should be taken into account when performing reliability calculations. However, the occurrence and spatial variation of spalling are highly uncertain. A first step towards a probabilistic analysis of spalling is made by combining existing deterministic models with a stochastic representation of the concrete tensile strength and by using random fields to model the tensile strength spatial variation.

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“…For our measurements, finely ground samples were prepared and placed into an alumina crucible with a volume of 100 mm 3 . The mass of the samples was about 80 mg.…”

Section: Simultaneous Thermal Analysis (Sta)mentioning

confidence: 99%

“…Concrete spalling and consequent bar exposure decrease durability of such structures. The fire exposure generates increase of the compressive stress parallel to the exposed surface causing tensile stress upright to the heated surface due to the thermal expansion of the water inside the pores [2][3]. Hence, the increase of the temperature builds up the water vapour pressure in the concrete pores and tensile stress in concrete structure.…”

Section: Introductionmentioning

confidence: 99%

High Temperature Exposure of HPC – Experimental Analysis of Residual Properties and Thermal Response

et al. 2016

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Abstract. The effect of high temperature exposure on properties of a newly designed High Performance Concrete (HPC) is studied in the paper. The HPC samples are exposed to the temperatures of 200, 400, 600, 800, and 1000°C respectively. Among the basic physical properties, bulk density, matrix density and total open porosity are measured. The mechanical resistivity against disruptive temperature action is characterised by compressive strength, flexural strength and dynamic modulus of elasticity. To study the chemical and physical processes in HPC during its hightemperature exposure, Simultaneous Thermal Analysis (STA) is performed. Linear thermal expansion coefficient is determined as function of temperature using thermodilatometry (TDA). In order to describe the changes in microstructure of HPC induced by high temperature loading, MIP measurement of pore size distribution is done. Increase of the total open porosity and connected decrease of the mechanical parameters for temperatures higher than 200 °C were identified.

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The “Chunnel” Fire. II: Analysis of Concrete Damage

Cited by 124 publications

References 2 publications

Tensile and shear bond strength between cement paste and aggregate subjected to high temperature

Tensile and shear bond strength between cement paste and aggregate subjected to high temperature

Prediction of the spatial occurrence of fire induced spalling in concrete slabs using random fields

High Temperature Exposure of HPC – Experimental Analysis of Residual Properties and Thermal Response

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