STUDY ON APPLICABILITY OF CRUSHED ROOF TILE WITH HIGH FRICTION AND LIGHTWEIGHT AS BACKFILL MATERIAL FOR CIVIL ENGINEERING STRUCTURE

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  • 摩擦性や軽量性が高い破砕瓦の裏込め材や裏埋め材などとしての適用性に関する検討

Abstract

<p> Many clay roof tiles have been used until now, and a large number of tiles that have reached the end of their useful life will be discarded in the near future. In addition, a certain amount of defective roof tiles are produced when clay tiles are manufactured. However, these unnecessary clay roof tiles are not recycled much except as recycled material for clay roof tile. Therefore, in this study, the applicability of crushed roof tile, which is recycled material made from defective roof tile, as a backfill material for civil engineering structure was studied through laboratory model tests and full-scale field tests. As a result of the study, it was clarified that crushed roof tile can be expected to reduce the horizontal earth pressure acting on civil engineering structure because that has lightweight and high frictional properties. In addition, it was clarified that crushed roof tile can be expected to have high bearing capacity even without reinforcement, reinforcing effect due to geosynthetics, and the range of influence of the vertical load on the crushed roof tile was almost the same as that on the pit sand. Therefore, crushed roof tile can be fully applied as a backfilling material for civil engineering structures.</p>

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