earticle

영어

The cork paving material is a road pavement that is produced and distributed based on the quality standards of the Korean standard (KS F 8980). In this study, for the localization of cork resources, the cork granule manufacturing pattern from Quercus variabilis, which is known to have the thickest cork layer among domestic species in Korea, was analyzed, and the cork paving material manufacturing potential was evaluated. The 57-year-old oak (approximately 40 cm in diameter at breast height) collected from the academic forest of Kangwon National University is classified into details such as the outer bark (including the cork layer), the inner bark, and the wood, and pulverize each of them in a cutter mill-type grinder for the same time. The shape and particle distribution of water were analyzed. As a result, the outer bark containing the cork layer showed an amorphous granular shape by pulverization, the inner bark was powdery, and the xylem was needle like shaped. About 1% of the total pulverized material of the outer bark was scattered and lost during pulverization and sampling, and about 31% had a particle size of 2 mm or less. About 68% of the total pulverized material was found to exceed 2 mm. Among them, the distribution of particles for installing the lower layer of cork paving material (more than 5 mm) was the highest, and the distribution of particles for installing the upper layer (2 to 4 mm) was 25% was high. Only cork granules suitable for the above-mentioned upper and lower layers were selected to manufacture cork paving materials for children's activity spaces, and their safety was evaluated by the HIC safety test method. As a result of the HIC safety inspection, the domestic oyster oak-based cork paving material did not show a significant difference from the case manufactured based on imported products, and it sufficiently exceeded the test standard of 1,000 or less even if the thickness of the finished product was varied.