폐어망과 저회의 재활용을 위한 폐어망 보강 저회의 역학적 특성 연구

Abstract

This paper investigates the mechanical characteristics of waste fishing net(WFN) reinforced bottom ash for recycling both bottom ash and WFN. In this study several series of triaxial test were carried out on the three different specimens : unreinforced bottom ash, reinforced bottom ash with 1 or 2 layers. The experimental results indicated that the shear properties of bottom ash were strongly influenced by reinforcing layer. It is shown that the internal friction angle of bottom ash increased with an increase in reinforcing layer due to interlocking effect and friction between bottom ash and waste fishing net. Pullout tests were carried out to evaluate pullout characteristics of waste fishing net, which added into bottom ash. Three different mesh size of WFN and geogrid were added as a reinforcement. Pullout characteristics of waste fishing net were compared with those of the geogrid. Pullout test results showed that pullout strength and stiffness of WFN2 are a little less than those of geogrid. However, the pullout friction angle of WFN2 is similar to that of geogrid due to bearing resistance induced from transverse rib because thickness of WFN2 is greater than geogrid. Direct shear test are carried out to evaluate friction properties of bottom ash-waste fishing net considering transverse rib types of waste fishing net. The experimental results indicated that the friction properties of reinforced bottom ash were influenced by transverse rib types of waste fishing net. It is found that the shear strength and internal friction angle of bottom ash-waste fishing net is positively correlated to the increasing transverse rib.