Thickness effect on flame spread characteristics of expanded polystyrene in different environments

Huang, Xiuxiu; Wang, Qingsong; Zhang, Y; Yin, Yan; Sun, JH

doi:10.1177/0892705711411341

Cited by 33 publications

(23 citation statements)

References 8 publications

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“…Both the convective heat flux and radiative heat flux of the surface flame decrease due to Sidewall Effect I. Sidewall Effect III could also weaken the surface flame. Huang et al [19] demonstrated that surface flame influences flame spread rate significantly, while pool flame (similar to the adherence flame in this work) contributes little to spread rate. Therefore, flame spread deceleration was observed in this work.…”

Section: Effects Of Sidewallsmentioning

confidence: 96%

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Effects of Sample Width and Sidewalls on Downward Flame Spread over XPS Slabs

An¹,

Xiao²,

Sun³

et al. 2014

Fire Saf. Sci.

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To study the effects of sample width and sidewalls on downward flame spread over extruded polystyrene (XPS) slabs, a series of laboratory-scale experiments were conducted. Flame shape, flame spread rate, mass loss rate and temperature were recorded. For XPS without sidewalls, the average maximum flame height (H) and average flame area per unit of width (A/w) rise linearly with an increase in sample width (w) and mass loss rate per unit of width. When sidewalls are absent, flame spread rate first drops and then rises with an increase in width. This trend is determined by gas-phase heat transfer. When sidewalls are present, flame spread rate increases with a rise in width, and solid-phase heat conduction determines the trend. Sidewall effects are comprised of four aspects: oxygen concentration near the sidewalls and gypsum board is low, which leads to reduced flame heat flux; upward and front air flow is intensified; the flame is stretched, and the surface flame is weakened; and molten XPS mass decreases. For narrow samples, H and A/w with sidewalls are higher than those without sidewalls, while the reverse was observed in wider samples. The mass loss rate, preheating length and average flame spread rate with sidewalls are smaller than those obtained without sidewalls. Flame spread acceleration with sidewalls occurs at a broader width than that without sidewalls. The experimental results agree well with the theoretical analysis.

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Section: Effects Of Sidewallsmentioning

confidence: 96%

“…Most of the pyrolysis gas from the cross section is pushed by the front air flow to the gypsum board. Thus the surface flame, which is an important factor influencing flame spread [19], is weakened. Furthermore, the surface flame angle θ becomes larger under the effect of front air flow (Fig.…”

Section: Effects Of Sidewallsmentioning

confidence: 99%

Effects of Sample Width and Sidewalls on Downward Flame Spread over XPS Slabs

An¹,

Xiao²,

Sun³

et al. 2014

Fire Saf. Sci.

View full text Add to dashboard Cite

show abstract

“…It was found that the heat transfer mechanism had changed with different sample widths: the flame spread was controlled by convection transfer regime initially while gradually changed to radiation regime as the sample width increased. Huang et al (2011Huang et al ( , 2012 and Jiang et al (2013Jiang et al ( , 2014 investigated the different combustion behaviors of XPS and expanded polystyrene (EPS). Qualitative observations of some thermal properties with some theoretical analysis were provided.…”

Section: Introductionmentioning

confidence: 99%

Large scale experimental study on the fire hazard of buildings’ U-shape façade wall geometry

Yan

Jiang

et al. 2017

Journal of Civil Engineering and Management

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Buildings have U-shape façade designs for certain purposes such as lighting. However, such designs may lead to a higher fire hazard. In this paper, large scale experiments of upward flame spread over XPS insulation material were conducted to investigate the fire hazard of building’s U-shape façade wall geometry. Comparison to previous laboratory scale experiments were also presented. Theoretical analysis was performed to reveal the mechanism of the U-shape geometry’s influences. It is found that such geometry design would increase the fire hazard of buildings: flame spread rate and flame height increased with U-shape’s geometrical factor. The results agreed with theoretical analysis. It is expected that the buildings’ U-shape façade wall geometry would greatly benefit flame spread for full scale applications and increase the fire hazard. Thus engineers should be careful with such façade wall designs, especially for residential building designs.

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“…Various research on ETICSs is focused on the probability of fire spread, fire safety, and fire barrier influence on ETICS reaction to fire performance. However, little knowledge is available on influence surface preparation mortar, reinforcing mesh, EPS thickness, and other treatment on the ETICS reactionto-fire performance [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Properties of External Insulation Surface Preparation Mortar Using Expandable Graphite for Fire Resistance

et al. 2019

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In the case of fire, surface treatment agents used in external insulation finishing methods are substances that are vulnerable to fire. This study examined the incorporation and applicability of expandable graphite in surface preparation mortar so that heat transfer to the surface part can be suppressed even when the cementitious surface preparation mortar is thinly constructed in the external insulation method. Experimental results showed that the mechanical properties of surface preparation mortar were improved by using the fly ash and silica fume. Surface treatment materials using expanded graphite have a characteristic of expanding when a fire occurs. It was experimentally confirmed that incorporating expanded graphite can reduce the phenomenon of heat penetration to the rear surface when the surface preparation mortar is exposed to high temperatures such as a flame.

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Thickness effect on flame spread characteristics of expanded polystyrene in different environments

Cited by 33 publications

References 8 publications

Effects of Sample Width and Sidewalls on Downward Flame Spread over XPS Slabs

Effects of Sample Width and Sidewalls on Downward Flame Spread over XPS Slabs

Large scale experimental study on the fire hazard of buildings’ U-shape façade wall geometry

Properties of External Insulation Surface Preparation Mortar Using Expandable Graphite for Fire Resistance

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