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KMID : 1039220150250010082
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Journal of Korean Society of Occupational and Environmental Hygiene
2015 Volume.25 No. 1 p.82 ~ p.88
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A Study of Penetration Depth into Ceiling Materials containing Asbestos according to Dilution Rate of Scattering Prevention Agent
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Shin Hyun-Gyoo
Choi Yong-Kue
Jeon Bo-Ram
Ha Joo-Yeon
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Abstract
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Objectives: This study is designed to analyze the penetration performance into ceiling materials containing asbestos of scattering prevention agents and investigate the change in penetration depth and viscosity according to the dilution rate of anti-scattering agents diluted with distilled water.
Methods: Five different types of scattering prevention agents were spread on plate-type asbestos ceiling materials. The penetration depth of each coated ceiling material was measured by energy dispersive spectroscopy (EDS) analysis, based on X-ray fluorescence (XRF) results of the non-coated ceiling materials. Test equipment installed the ceiling materials and 60 minutes were collected at a flow rate of 10 ℓ/min at a filter of 25 mm.
Results: An EDS analysis of the cross-section of ceiling materials constructed with a scattering prevention agent revealed that potassium is detected in the process of penetrating hardener solidification and this element could be an indicator for infiltration. When anti-scattering agents with different viscosities were constructed and the penetration depth was analyzed by potassium detection assessment using EDS, the depth results with viscosities of 5.0, 2.5, and 1.9 cP were 98.5, 103, and 147 μm, respectively. Penetration performance improved with decrease in viscosity.
Conclusions: For asbestos ceiling materials, it is concluded that a higher dilution rate of the scattering prevention agent leads to lower viscosity, and hence a deeper penetration depth from 156 ㎛ to 3 mm. The asbestos anti-scattering properties according to the penetration depth will be confirmed through further study.
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KEYWORD
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asbestos, dilution, penetration depth, scattering prevention agent, viscosity
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