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Journal of the Korean Society of Hazard Mitigation 2012;12(5):113-120.
Published online October 31, 2012.
섬유 보강 CSG 식생블록의 식생 및 강도 특성
윤용선, 김용성, 연규석, 김기성
Vegetation and Strength Characteristics of Planting Blocks Prepared Cemented Sand and Gravel Reinforced by Geosynthetics
Yong Sun Yoon, Yong Seong Kim, Kyu Seok Yeon, Ki Sung Kim
Abstract
This study was performed to evaluate the strength characteristics, the planting properties and root potential of planting block with seeding three species of grasses in CSG blocks manufactured by cemented sand and materials (CSG) in order to develop CSG planting blocks reinforced by geosynthetics. Four types of CSG mix designs with cement contents were determined, and the mechanical properties of CSG materials with polyvinyl alcohol were studied experimentally. To analyze growth properties of plants within CSG block, visual cover, plant height, root potential and the flexural strength were measured at 28 days after seeding. The visual cover of kinds of plants evaluated by visual rating system were in the range of 7.5~9.5 in case of seeding three species of grasses in 4 weeks after seeding. The flexural strength of planting blocks prepared with CSG and Polyvinyl alcohol (PVA) were in the range of 1.02~3.76 MPa in 28 days. It is expected that this study will contribute to increasing application of CSG materials as well as to increasing the utilizing of PVA materials as a environmentally friendly CSG method.
Key Words: CSG; Polyvinyl alcohol; Planting block; Strength; Root potential
요지
본 연구에서는 세 종류의 잔디를 혼합 파종한 CSG 식생블록에 섬유를 첨가한 후 강도 특성, 식생 특성, 근계력 특성 등의 분석을 통해 섬유 보강 CSG 식생 블록의 식생 및 강도 특성을 고찰하였다. 네 종류의 CSG 배합설계로 하여 CSG재료의 역학적 특성을 실험을 통해 고찰하였으며, CSG 식생블록의 식생 성장 특성 분석을 위해 식생 28일 후의 피복도 및 생장량, 근계력, 휨강도 등을 측정하였다. 식생에 따른 블록의 피복도는 시각적 평가방법을 이용하여 세 종류의 잔디 파종 4주후 측정 결과 7.5~9.5점 정도로 나타났으며, PVA가 첨가된 CSG 식생 블록의 재령 28일 휨강도는 1.02~3.76 MPa 정도를 나타냈다. 본 연구를 통해 기존에 수행된 많은 PVA 관련 연구 성과들을 CSG공법에 접목할 수 있는 계기를 마련할 수 있을 것으로 기대된다.
핵심용어: 식생 블록; 강도; 근계력
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