Most spent foundry sand (SFS) is disposed in waste containment facilities; only 41.4% beneficially reused in recycling.In foreign countries, some spent foundry sand is finding uses in highway bases and retaining structures, asphalt concrete,and pavement bases. However, limited information is available on the use of SFS as a component in the base or subbaselayers of pavements. Large volumes of SFS can be used in roadway construction, so this information is very important.In this study, the geotechnical properties of SFS amended road base material such as particle size, turbidity, andpermeability were estimated to decided the optimal conditions in thermal stabilization. At the optimal conditions, abrasiontest and California bearing ratio (CBR) test were conducted to evaluate the degree of qualification for the standard ofsubbase layers of pavement. Also, the hazardous characteristics of SFS were evaluated by Korea extraction test (KET)and toxicity characteristic leaching procedure (TCLP). It was realized that SFS can be used as auxiliary material inpavement subbase when particle size of SFS was amended by mixing with another pavement materials.

I. 서 론
 II. 실험재료와 방법
 III. 결과 및 고찰
  1. 폐주물사의 기초 특성
  2. 폐주물사의 안정화 조건 검토
  3. 도로보조 기층용으로써 폐주물사의 적합성 검토
 IV. 결 론
 사 사
 References

• 이승희(경기대학교 공과대학 환경에너지공학과) | Seung-Whee Rhee Corresponding author