Thermo-physical properties of concrete exposed to high temperature

Kizilkanat, Ahmet B.; Yüzer, Nabi; Kabay, Nihat

doi:10.1016/j.conbuildmat.2013.03.080

Cited by 53 publications

(19 citation statements)

References 15 publications

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“…A comparative study of the thermal conductivity between siliceous and calcareous concrete after heating was performed by using the guarded hot plate method. The reduction of the thermal conductivity of calcareous concrete is lower than that of the siliceous aggregates with temperature [3,8]. The same phenomenon is observed in another study using a HotDisk apparatus [10].…”

Section: Introductionsupporting

confidence: 55%

“…goethite dehydrate from 250°C), and undergo crystalline transformations accompanied by a significant volume expansion (e.g. quartz a-b transformation) [3,8]. These changes will affect the thermal properties of concretes and allow large amounts of energy consumption [12].…”

Section: Introductionmentioning

confidence: 99%

“…Under high temperature, chemical composition, physical structure and moisture content of concrete change and the thermal properties of concrete are modified [8]. These changes are observed in the cement paste and in the aggregates and at the paste-aggregate interface [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Aggregate’s influence on thermophysical concrete properties at elevated temperature

Xing

Beaucour

Hébert

et al. 2015

Construction and Building Materials

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Section: Introductionsupporting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

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Aggregate’s influence on thermophysical concrete properties at elevated temperature

Xing

Beaucour

Hébert

et al. 2015

Construction and Building Materials

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“…chimneys, nuclear reactors and metallurgical plants) or may suffer from high temperature attacks caused by fire accidents [1]. A number of researches have been done on performances of concrete under elevated temperatures [2][3][4][5], which provide much information on temperature effects on mechanical properties, durability, and changes in physical structure and chemical composition. The influences of exposure time, heating rate, cooling regime, and properties of aggregates and binder materials are also widely investigated [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Dynamic compressive behaviour of concrete after exposure to elevated temperatures

Ren

Xu²,

2015

Mater Struct

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The aim of this paper is to investigate the high temperature performance of concrete under impact loading. A split Hopkinson pressure bar system was employed to determine the dynamic mechanical properties of concrete under different strain rates and temperatures. The results indicate that the hardening and toughening effects of strain rate on concrete are obvious under a given temperature. Moreover, high temperature exposure makes concrete more ductile and less resistant to impact loading. An increase in temperature leads to an obvious reduction in dynamic strength and toughness, and results in a larger strain rate and critical strain. Whereas for temperature of 200°C, the dynamic strength barely changes even slightly increases. Meanwhile, the toughness at this temperature decreases firstly and later increases with strain rate in comparison to that at room temperature. Besides, as temperature increases, the dynamic fragmentation of concrete gets more violent, the stress-strain curve tends to flatten and the corresponding ascending branch becomes less steep. The stressstrain relationship of concrete under different strain rates and temperatures can be formulated by a modified model, which can well describe the dynamic mechanical behaviour of the heated concrete.

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“…Uno de los posibles usos es la utilización para infraestructuras de almacenamiento de energía térmica en centrales termosolares, que han de soportar ciclos térmicos a altas temperaturas [7,8]. El trabajo está enmarcado dentro del Proyecto Europeo LORCENIS [9].…”

Section: -Introducciónunclassified

Diseño de mezclas de hormigones autocompactantes con alto contenido de adiciones minerales y áridos de diferentes naturaleza para desempeño en ambientes altamente agresivos

Puentes

Calvo

Alonso

2018

Libro De Comunicaciones / Livro Das Comunicações

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RESUMENEl presente estudio se centra en el desarrollo de dosificaciones de hormigones autocompactantes (HAC) para ser empleados en la construcción de infraestructuras de almacenamiento de energía térmica. En el estudio se han considerado tres aspectos básicos: 1) selección del cemento óptimo (Binario con 50% escorias de alto horno y ternario con 20% de escorias de alto horno y 20% de cenizas volantes), 2) áridos de altas prestaciones térmicas: calizo, basáltico y Clinker de cemento, y 3) combinación de aditivos para mejorar las características de trabajabilidad, fluidez y tiempo abierto. El diseño de los hormigones se ha realizado en dos etapas: i) utilizando el método de morteros equivalentes, ii) HAC de altas prestaciones térmicas. Se ha establecido el método de morteros equivalentes como una herramienta de apoyo en la fase preliminar del estudio, en el desarrollo del hormigón. La compatibilidad de los diferentes tipos de aditivos con los cementos binarios y ternarios con alto contenido en adiciones minerales ha sido comprobada en los morteros equivalentes. Siempre la cantidad del aditivo superplastificante / Reductor de agua (SP/RA) es menor que el aditivo para mejorar la trabajabilidad (SP/T) y complementado con la Nano-sílice (NS) usada además como modulador de viscosidad. El árido basáltico mejora la fluidez, aumenta la densidad y resistencia, pero complica la trabajabilidad. El árido calizo aporta docilidad y baja la densidad. El árido de clinker mejora la trabajabilidad y aumenta la densidad. El filler calizo (FC) mejora la compacidad aunque en detrimento de las resistencias.

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Thermo-physical properties of concrete exposed to high temperature

Cited by 53 publications

References 15 publications

Aggregate’s influence on thermophysical concrete properties at elevated temperature

Aggregate’s influence on thermophysical concrete properties at elevated temperature

Dynamic compressive behaviour of concrete after exposure to elevated temperatures

Diseño de mezclas de hormigones autocompactantes con alto contenido de adiciones minerales y áridos de diferentes naturaleza para desempeño en ambientes altamente agresivos

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