Performance of thermally damaged fibre reinforced concretes

Sideris, Kosmas K.; Manita, P.; Chaniotakis, Emmanouil

doi:10.1016/j.conbuildmat.2008.08.009

Cited by 103 publications

(48 citation statements)

References 8 publications

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“…It has been shown that the addition of steel fibers into HPC increased specific heat capacity and decreased thermal expansion [31]. For HPC, the steel fibers increased the lower bound of the spalling temperature range from 300°C to 450°C, but concrete still spalled between 450°C and 800°C [28,32]. In contrast, the addition of polypropylene fibers into HPC did not show spalling at any temperature range tested [28,32].…”

Section: Elevated Temperature Effect On Cementitious Materialsmentioning

confidence: 89%

“…Some HPC spalled between 300°C and 600°C [28,29] after one hour heating duration, while normal strength concrete (NSC) only showed a reduction in compressive strength without spalling. The spalling is often explosive and can be attributed to the combined effect of two factors: (i) the increased brittleness of HPC compared to NSC, and (ii) an increase in the vapor pressure from the addition of silica fume in making HPC [28,29]. Since silica fume leads to low permeability and low porosity in concrete, the vapors from the evaporation of water cannot escape and will increase the pressure and tensile stress inside the concrete, causing spalling.…”

Section: Elevated Temperature Effect On Cementitious Materialsmentioning

confidence: 98%

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Effect of elevated temperature on strain-hardening engineered cementitious composites

Bhat

Chang

2014

Construction and Building Materials

111

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h i g h l i g h t sEngineered cementitious composite is proposed for spent nuclear fuel storage. High temperature effect on ECC uniaxial tension properties is characterized. ECC has high spalling resistance after 6 h of exposure to 600°C. ''Spider web'' nano-cracks are absent in ECC at temperatures up to 600°C. The change in ECC microstructure explains its mechanical properties deterioration. a b s t r a c tStrain-hardening engineered cementitious composite materials (ECC) is proposed to substitute quasibrittle concrete materials for building extended spent nuclear fuel (SNF) storage systems in nuclear power plants. While most of ECC properties have been established under normal temperature, the study aims at understanding ECC material behavior under elevated temperature that is expected in a SNF storage environment. On the composite level, ECC specimens were characterized at various temperature levels up to 600°C under both uniaxial tension and compression. The elevated temperature effect on tensile strength and strain capacity, compressive strength and failure mode, moisture loss, and spalling behavior was studied. On the microstructure level, optical microscopy and scanning electron microscopy were conducted to probe the degradation of components, and the change of pore structures due to fiber melting within ECC. The results will provide crucial data and insights for future studies of re-engineering ECC with robust properties specifically desired for nuclear engineering applications.

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Section: Elevated Temperature Effect On Cementitious Materialsmentioning

confidence: 89%

Section: Elevated Temperature Effect On Cementitious Materialsmentioning

confidence: 98%

Effect of elevated temperature on strain-hardening engineered cementitious composites

Bhat

Chang

2014

Construction and Building Materials

111

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“…This mixture consists of widely-used and available components, listed in Table 1. Polypropylene fibres were added to prevent concrete from spalling (Sideris et al 2009). The four point bending test was performed on beams notched in the mid-span.…”

Section: Concrete Composition and Test Specimensmentioning

confidence: 99%

To Testing of Steel Fibre Reinforced Concrete at Elevated Temperature

Goremikins¹,

Blesak²,

Novák³

et al. 2016

ASFE

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Addition of steel fibres improves properties of concrete. The lack of information considering tensile and post cracking behaviour of SFRC at elevated temperatures is an obstacle on the wide use of this composite material. This work presents an experimental study of steel fibre reinforced concrete subjected to high temperature. Compressive strength, split tensile strength and ultimate bending strength were evaluated. The specimens were heated by ceramic heaters and then repacked for testing.

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“…The main reason for concrete's spalling at elevated temperatures is considered to be the internal pore pressure buildup due to the vaporization of the free and chemically bound water (10). In concrete mixtures with finer pore structure, such as HPC, this internal pressure is not released, thus leading to spalling of concrete surface (9,(11)(12)(13)(14).…”

Section: Introductionmentioning

confidence: 99%

Influence of length and dosage of polypropylene fibres on the spalling tendency and the residual properties of self-compacting concrete after heated at elevated temperatures

Sideris

Manita

2013

MATEC Web of Conferences

Self Cite

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Abstract. The objective of this paper was to study the influence of different length and dosage of polypropylene fibres on the properties of self-compacting concretes at elevated temperatures. A total of five self compacting concretes and one normally vibrated concrete were produced. The poypropylene fibres were of different length (12 mm, 6 mm and 3 mm) and were added at dosages of 1.0 Kg/m 3 and 0.5 Kg/m 3 . The properties measured after fire exposure were the compressive strength, splitting tensile strength and water capillary absorption. The best overall performance was observed on the fibre reinforced self compacting concrete produced with the 6 mm HPR fibres at a dosage of 0.5 Kg/m 3 .

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Performance of thermally damaged fibre reinforced concretes

Cited by 103 publications

References 8 publications

Effect of elevated temperature on strain-hardening engineered cementitious composites

Effect of elevated temperature on strain-hardening engineered cementitious composites

To Testing of Steel Fibre Reinforced Concrete at Elevated Temperature

Influence of length and dosage of polypropylene fibres on the spalling tendency and the residual properties of self-compacting concrete after heated at elevated temperatures

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