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J. Ocean Eng. Technol. 2009;23(3):20-29.    

Shearing Properties of Waste Tire Powder-Added Lightweight Soil by Direct Shear Test
Kim Yun-Tae,Kang Hyo-Sub
Department of Ocean Engineering Pukyong National University,Department of Ocean Engineering Pukyong National University
직접전단시험에 의한 폐타이어 혼합경량토의 전단특성 연구
김윤태,강효섭
부경대학교 해양공학과,부경대학교 해양공학과
Copyright © 2009 The Korean Society of Ocean Engineers     Open access / Under a Creative Commons License
Key Words: Recycling, Bottom ash, Dredged soil, Waste tire powder, Lightweight soil, Direct shear test
핵심용어: 재활용, 저회, 준설토, 폐타이어 분말, 경량토, 직접전단시험
Abstract
This study investigated the shear strength characteristics of waste tire powder-added lightweight soil (WTLS), which were developed to recycle dredged soil, bottom ash, and waste tires. The WTLS used in this experiment consisted of dredged soil, bottom ash, waste tire powder, and cement. Test specimens were prepared with various contents of waste tire powder ranging from 0% to 100% at 25% intervals and bottom ash contents of 0% or 100% by the weight of the dry dredged soil. In this study several series of direct shear tests were carried out, which indicated that the shear properties of WTLS were strongly influenced by the mixing conditions, such as the waste tire powder content and bottom ash content. The unit weight, as well as the shear strength of the WTLS, decreased with an increase in waste tire powder content. The shear strength of WTLS with bottom ash was 1.34 times greater than that of WTLS without bottom ash. An average increase in cohesion of 30 kPa was obtained in WTLS with the inclusion of bottom ash due to the bond strength induced from the pozzolanic reaction of the bottom ash. In this test, the maximum value of the internal friction angle was obtained with a 25% content of waste tire powder.


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