Assessment of fire damaged concrete using colour image analysis

Short, N. R.; Purkiss, J. A.; Guise, S. E.

doi:10.1016/s0950-0618(00)00065-9

Cited by 146 publications

(82 citation statements)

References 1 publication

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“…Such color changes are a useful tool for estimating temperatures easily which have been reached after exposure to fire. They can also be used as an indication of significant loss in mechanical properties and are useful since the appearance coincides with a significant reduction in strength as a result of heating [44].…”

Section: Change In Color With Temperaturementioning

confidence: 99%

Mechanical properties of cotton fabric reinforced geopolymer composites at 200–1000 °C

et al. 2014

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Abstract:Geopolymer composites containing woven cotton fabric (0-8.3 wt%) were fabricated using the hand lay-up technique, and were exposed to elevated temperatures of 200 ℃, 400 ℃, 600 ℃, 800 ℃ and 1000 ℃. With an increase in temperature, the geopolymer composites exhibited a reduction in compressive strength, flexural strength and fracture toughness. When heated above 600 ℃, the composites exhibited a significant reduction in mechanical properties. They also exhibited brittle behavior due to severe degradation of cotton fibres and the creation of additional porosity in the composites. Microstructural images verified the existence of voids and small channels in the composites due to fibre degradation.

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Section: Change In Color With Temperaturementioning

confidence: 99%

Mechanical properties of cotton fabric reinforced geopolymer composites at 200–1000 °C

et al. 2014

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“…Colour change at the concrete surface and within cross-sections adds helpful information relating to the maximum temperature to which the material was exposed, as most discolouration is associated with oxidation and decarbonation reactions that take place in both the aggregates and the cement mortar [5][6][7][8]. The main characteristics explored in this work are moisture loss from the decomposition of the calcium silicate hydrate (C-S-H), the transformation of the portlandite (Ca(OH)2), the oxidation of iron hydroxides (Fe(OH)2) and the decarbonation of calcium carbonates (CaCO3) [9].…”

Section: Introductionmentioning

confidence: 99%

A thermoanalytical, X-ray diffraction and petrographic approach to the forensic assessment of fire affected concrete in the United Arab Emirates

Alqassim

Jones

Berlouis

et al. 2016

Forensic Science International

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A thermoanalytical, X-ray diffraction and petrographic approach to the forensic assessment of fire affected concrete in the United Arab Emirates Alqassim, M. A.; Jones, Martyn; Berlouis, L. E. A.; Nic Daeid, Niamh General rightsCopyright and moral rights for the publications made accessible in Discovery Research Portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from Discovery Research Portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain.• You may freely distribute the URL identifying the publication in the public portal. Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. KeywordsForensic investigation; Concrete; Fire; Thermal Analysis; X-ray Diffraction; Colour Change. Highlights• This work studies the application of thermogravimetric analysis, differential scanning calorimetry, X-ray diffraction and petrography as tools for revealing the thermal history on concrete structures.• • Other reactions can be reversible, particularly the dehydroxylation of Portlandite.The thermal history can still be determined though by comparing the onset temperature of reformed components with Portlandite in non-previously heated samples.

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“…Visual inspection of colour change is for instance one of the initial steps in assessment of firedamaged concrete [12] which may then be followed by detailed investigations [9]. Visual inspection of colour change of heated gives an idea of the modification in the properties of concrete [28] and shown in Fig.…”

Section: Results and Analysis 61 Colour Change Of Heated Concretementioning

confidence: 99%

“…In terms of laboratory (off-site) investigations, samples of damaged material and undamaged references may also be removed for laboratory testing and examinations [5]. These tests would for instance include: core strength, ultrasonic pulse velocity, Windsor probe, BRE internal fracture and petrographic examinations [9]. Table 1 below shows a summary of the existing methods for the assessment of fire-damaged structures.…”

Section: Introductionmentioning

confidence: 99%

A non-destructive technique for health assessment of fire-damaged concrete elements using terrestrial laser scanning

Mukupa

Roberts

Hancock

et al. 2016

J Civil Struct Health Monit

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Assessment of fire damaged concrete using colour image analysis

Cited by 146 publications

References 1 publication

Mechanical properties of cotton fabric reinforced geopolymer composites at 200–1000 °C

Mechanical properties of cotton fabric reinforced geopolymer composites at 200–1000 °C

A thermoanalytical, X-ray diffraction and petrographic approach to the forensic assessment of fire affected concrete in the United Arab Emirates

A non-destructive technique for health assessment of fire-damaged concrete elements using terrestrial laser scanning

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