Effects of polypropylene fibre type on occurrence of heat-induced concrete spalling

Maluk, Cristián; Bisby, Luke; Terrasi, Giovanni P.

doi:10.1051/matecconf/20130601005

Cited by 6 publications

(2 citation statements)

References 13 publications

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“…Thermal testing of 66 comparably sized specimens undertaken using H-TRIS by Maluk et al (2013) resulted in all specimens apart from one mix set experiencing spalling. All those specimens at the time of testing had moisture contents between 4.0% to 5.0% (by mass).…”

Section: Temperature Readingsmentioning

confidence: 99%

Response of concrete cast in permeable moulds to severe heating

Richards

Rickard

Orr

et al. 2018

Construction and Building Materials

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This paper evaluates the effect that a permeable mould, such as would be used to create fabric-formed concrete, may have on the heat-induced explosive spalling performance of cast concrete, using a novel experimental fire testing method and supported by scanning electron microscopy. Recent research suggests that a concrete cast using fabric formwork will gain durability enhancements at the cast surface that may negatively affect pore-pressure expulsion during severe heating. Six concrete samples were cast using high strength concrete including silica fume and tested using the University of Edinburgh's Heat-Transfer Rate Inducing System (H-TRIS), receiving thermal loading on one surface. Three samples were cast in permeable moulds, formed using a Huesker HaTe PES 70/70 single layer woven geotextile with a characteristic opening size (O 90) of 0.1x10-3 m. Three samples were cast in conventional impermeable timber moulds. The tests showed no conclusive evidence of differences in thermal profile or differential thermal deflections between the two casting methods; no occurrences of heat-induced explosive spalling were observed for either casting method. However, scanning electron microscopy undertaken on additional samples showed that the test face of samples cast in permeable moulds were over four times less porous compared to their impermeably cast equivalents. This could increase the risk of spalling of samples, particularly in cases where pore-pressure spalling dominates the material response. However, additional fire testing using H-TRIS is needed under a range of heating and loading conditions, before definitive conclusions on the spalling propensity of fabric-formed concrete can be made.

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Section: Temperature Readingsmentioning

confidence: 99%

Response of concrete cast in permeable moulds to severe heating

Richards

Rickard

Orr

et al. 2018

Construction and Building Materials

View full text Add to dashboard Cite

show abstract

“…This means that a short, hot fire and a long, cool fire that have the same areas under the real fire curve, could have the same time equivalent FIM when the definition of FIM used herein is applied. However, due to the material properties of concrete, and in particular its low thermal conductivity, a long cool fire will create more uniform temperatures and, on average, higher temperatures within the concrete than a short, hot fire; albeit with less risk of spalling according to the available literature [31] .…”

Section: Comments On Srmsmentioning

confidence: 99%