Effect of Rootzone Mixes Amended with Crumb Rubber on the Physical Properties

폐 타이어 고무칩을 혼합한 개량제의 물리성 개선 효과

  • Chong, She-Kong (Plant, Soil, and General Agriculture Department, Southern Illinois University) ;
  • Ok, Chang-Ho (Turfgrass Research Institute, FineAm Co. Ltd)
  • 청쉬콩 (남 일리노이 대학교 토양학과) ;
  • 옥창호 ((주) 화인에이엠 - 에이엠 잔디연구소)
  • Published : 2006.06.01

Abstract

This research was initiated to enhance the tilth of fine-textured soil for turf growth by incorporation of crumb rubber shredded from used tires. A specific objective was to determine the physical properties of soil mixes amended with different grade and amount of crumb rubber in soils. Two soils and three different grades(3.5, 6.5 and 9.5 mm) of crumb rubber were used. The soils selected were an Arenzville silt loam(coarse-silty, mixed, nonacid, mesic Typic Udifluvents) and a Hosmer silty clay loam(fine-silty, mixed, mesic Typic Fragiudalfs). The amount of crumb rubber mixed in soil ranged from 0 to 0.4 $g{\cdot}g^{-1}$(using 0.05 $g{\cdot}g^{-1}$) increments and 0 as a control. For each treatment, soil cores were constructed following the recommendation by the United States Golf Association Green Section Record. Results indicated that porosity of the mixes decreased as the amount of crumb rubber increased. Regardless of the grade of crumb rubber, mixes with less than 0.15 $g{\cdot}g^{-1}$ of crumb rubber in fine-textured soil could not enhance their macro-porosity and hydraulic conductivity. However, as the amendment increased over 0.15 $g{\cdot}g^{-1}$, the tilth of the mixes had improved significantly macro-porosity, hydraulic conductivity and air permeability, as compared with a control.

본 연구는 폐 타이어를 미사질 토양에 혼합하여 경기장 식재층으로서의 질을 향상 시키고자 실시하였다. 특히 본 실험을 통해 토양에 혼합되는 폐 타이어의 입경 크기와 혼합량에 따라 식재층의 토양 물리적 특성을 측정하고자 하였다. 실험에서 두 종류의 토양 [Arenzville silt loam(coarse-silty, mixed, nonacid, mesic Typic Udifluvents), Hosmer silty clay loam(fine-silty, mixed, mesic Typic Fragiudalfs)]과 입경 크기(3.5, 6.5, 9.5mm)에 따라 세 가지의 폐 타이어를 사용하였다. 각각 크기별 토양에 혼합된 폐 타이어의 혼합 비율은 0에서 0.4 $g{\cdot}g^{-1}$ 사이였다. 각각의 처리구에 대한 실험 진행 및 물리성 조사는 미국 골프협회 Green Section Record 의 기준 방법에 준해서 실시하였다. 본 실험의 결과 토양에 혼합된 폐 타이어의 비율이 증가 할수록 토양의 총 공극량은 감소하였다. 하지만 입경 크기와 상관없이 폐 타이어의 혼합량이 0.15 $g{\cdot}g^{-1}$ 이하인 경우에는 대공극과 포화투수계수에 차이가 없었다. 반면 폐타이어가 0.15 $g{\cdot}g^{-1}$ 이상으로 혼합된 토양은 대 공극, 포화 투수계수, 그리고 공기 투과율이 대조구에 비해 통계적으로 유의하게 개선되었다.

Keywords

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