Explosive spalling and residual mechanical properties of fiber-toughened high-performance concrete subjected to high temperatures

Peng, Gai Fei; Yang, Wenwu; Zhao, Jie; Liu, Yefeng; Bian, Song-Hua; Zhao, Lihong

doi:10.1016/j.cemconres.2005.12.014

Cited by 285 publications

(148 citation statements)

References 9 publications

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“…The spalling of concrete under high temperatures is a concern due to exposure of the steel reinforcement to direct fire contact and subsequent structural capacity loss of the element [7]. It was mentioned in the literature that the possible reason behind explosive spalling might be the internal cracking, pore pressure, rapid heating of concrete specimens, moisture content and strength grade of concrete [23][24][25]. In this study, no explosive spalling was observed in ECC cylinder specimens even after exposure to 800°C.…”

Section: Surface Characteristics and Spalling Of Heat Treated Ecc Spementioning

confidence: 99%

“…This situation is valid for all studied specimen sizes. Normally, it is expected that the risk of explosive spalling must be increased with the increase of specimen size due to the heat and moisture transport through the specimen [11,12,23]. The microstructure of the tested specimen controls the water expulsion from the concrete at normal as well as at high temperature.…”

Section: Surface Characteristics and Spalling Of Heat Treated Ecc Spementioning

confidence: 99%

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Specimen size effect on the residual properties of engineered cementitious composites subjected to high temperatures

Erdem

2014

Cement and Concrete Composites

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a b s t r a c tIn this study, size effect on the residual properties of Engineered Cementitious Composites (ECC) was investigated on the specimens exposed to high temperatures up to 800°C. Cylindrical specimens having different sizes were produced with a standard ECC mixture. Changes in pore structure, residual compressive strength and stress-strain curves due to high temperatures were determined after air cooling. Experimental results indicate that despite the increase of specimen size, no explosive spalling occurred in any of the specimens during the high temperature exposure. Increasing the specimen size and exposure temperature decreased the compressive strength and stiffness. Percent reduction in compressive strength and stiffness due to high temperature was similar for all specimen sizes.

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Section: Surface Characteristics and Spalling Of Heat Treated Ecc Spementioning

confidence: 99%

Section: Surface Characteristics and Spalling Of Heat Treated Ecc Spementioning

confidence: 99%

Specimen size effect on the residual properties of engineered cementitious composites subjected to high temperatures

Erdem

2014

Cement and Concrete Composites

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“…Significant problem is, next to the decrease of mechanical properties, the explosive spalling described in several studies and practical experiences. [2][3][4] Stonis et al 5 tried to replace silica fume by metakaolin (MK) in heat-resistance concrete and established that ultimate compressive strength after temperature loading at 800°C and 1200°C is higher by 5% and 10%, respectively (compared to silica fume). It has been shown by Morsy and Shebl 6 that appropriate addition of MK improves final resistance against sudden thermal shock.…”

Section: Introductionmentioning

confidence: 99%

Fracture characteristics of refractory composites containing metakaolin and ceramic fibers

Holčapek

Reiterman

Konvalinka

2015

Advances in Mechanical Engineering

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The aim of present article is to describe influence of composition of refractory composites on its response to gradual thermal loading. Attention was focused on the impact of ceramic fibers and application of metakaolin as an aluminous cement supplementary material. Studied aluminate binder system in combination with natural basalt fine aggregates ensures sufficient resistance to high-temperature exposure. Influence of composition changes was evaluated by the results of physical and mechanical testing-compressive and flexural strength, bulk density, and fracture energy were determined on the different levels of temperature loading. Application of ceramic fibers brought expected linear increase of ductility in studied composites. Metakaolin replacement showed the optimal dose to be just about 20% of aluminous cement weight.

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“…강섬유보강 콘크리트 고온거동 및 특성에 대한 연구는 실 험의 편이성 때문에 대부분 고온상태에서 압축강도, 할렬인장 강도 및 휨강도의 변화에 집중하였다 (Shallal and Al-Owaisy, 2007;Chen and Liu, 2004;Khalil, 2006;Alireza et al, 2008;Singh et al, 2010;Peng et al, 2006) (1) …”

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Experimental Study on Tensile Strength of Steel Fiber-Reinforced Concrete Subjected to High Temperature

Moon¹

2013

Journal of Korean Society of Hazard Mitigation

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Tensile strength of steel fiber-reinforced concrete was investigated with experimental program. For the investigation, Double Punch Test, which is known as a test method with low validity, was used. Fiber type(hooked and twisted fiber), mix ratios by volume ranged from 0.25% to 1.0%, aspect ratio were used as variables for the tests. The specimens were exposed to the elevated temperatures(300 o C, 500 o C and 700 o C) for 2 hours and placed at ambient temperatures for 12 hours before testing. Results demonstrated that residual tensile strength increases as mix ratio and aspect ratio increase. The effect of fiber type was insignificant. Based on the test results, the linear equation for prediction of DPT residual tensile strength was proposed in terms of mix ratio and aspect ratio.

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Explosive spalling and residual mechanical properties of fiber-toughened high-performance concrete subjected to high temperatures

Cited by 285 publications

References 9 publications

Specimen size effect on the residual properties of engineered cementitious composites subjected to high temperatures

Specimen size effect on the residual properties of engineered cementitious composites subjected to high temperatures

Fracture characteristics of refractory composites containing metakaolin and ceramic fibers

Experimental Study on Tensile Strength of Steel Fiber-Reinforced Concrete Subjected to High Temperature

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