Comparison of Mechanical Characteristics of Fiber-Reinforced Lightweight Soils

J. Ocean Eng. Technol. 2008;22(4):51-58.

Kim Yun-Tae,Han Woo-Jong

Department of Ocean Engineering Pukyong National University,Department of Ocean Engineering Pukyong National University

섬유보강 혼합경량토의 역학적 특성 비교

김윤태,한우종

부경대학교 해양공학과,부경대학교 해양공학과

Keywords: Dredged soil, Bottom ash, Monofilament, Waste fishing net, Unrefined compression test, Direct shear test

핵심용어: 준설토, 저회, 단섬유, 폐어망, 일축압축강도시험, 직접전단시험

Abstract

The objective of this study was to investigate the mechanical characteristics of fiber-reinforced lightweight soil using waste fishing net or monofilament for recycling both dredged soils and bottom ash. Reinforced lightweight soil consists of dredged soil, cement, air foam, and bottom ash. Waste fishing net or monoiament was added the mixture in order to increase the shear strength of the lightweight soil. Test specimens were fabricated with various mixing conditions, including waste fishing net content and monofilament content. Several series of unconfined compression tests and direct shear tests were carried out. From the experimental results, it was found that the unconfined compressive strength, as well as the stress-strain behavior of reinforced lightweight soil was strongly influenced by mixing conditions. In this study, the maximum increase in shear strength was obtained with either a 0.5% content of monofilament or 0.25% waste fishing net. The unconfined compressive strength of reinforced lightweight soil with monofilament was greater than that of reinforced lightweight soil with waste fishing net.