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http://dx.doi.org/10.15269/JKSOEH.2020.30.1.18

Research on Durability Assessment of Asbestos Stabilizer for Asbestos-containing Ceiling Materials  

Ha, Joo-Yeon (Materials Technology Center, Korea Testing Laboratory)
Shin, Hyun-Gyoo (Materials Technology Center, Korea Testing Laboratory)
Publication Information
Journal of Korean Society of Occupational and Environmental Hygiene / v.30, no.1, 2020 , pp. 18-27 More about this Journal
Abstract
Objectives: For testing asbestos stabilizer products which are used for the maintenance and management of asbestos-containing materials, durability assessment should accompany the evaluation of basic properties and performance. Therefore, in this study we designed a testing method and constructed a database of durability performance, thereby providing basic data for reliability studies of asbestos stabilizer. Methods: Since the ceiling materials targeted in this study are interior materials, test conditions of 95% relative humidity and 60℃ temperature were designed in consideration of the effect of high relative humidity in summer and seasonal indoor temperatures. Plate-shaped specimens treated with asbestos stabilizers were maintained in a thermo-hygrostat for 5, 10, and 20 days, and then the asbestos scattering prevention rate was measured by air erosion testing. Results: The scattering concentration tended to increase with time under the single humidity condition, and exceeded the indoor air quality standard of 0.01 f/cc, during the 20 days of maintenance. On the other hand, there was little change according to the temperature condition. In the case of a complex condition with temperature and humidity, the results were similar to the humidity test, but the scattering concentration increased more sharply at 20 days. Conclusions: The main deterioration factor that affects the durability of asbestos stabilizer is humidity, and the deterioration is caused by a mechanism in which the stabilizer coated on the surface is re-dissolved by moisture and evaporates or the coating layer is peeled off, which is accelerated by high temperatures.
Keywords
Asbestos; asbestos stabilizer; ceiling materials; durability assessment; humidity;
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