This study investigated the concentration of heavy metals in blast-furnace slag cement by changing the content ratio between blast-furnace slag and ordinary Portland cement for the safe recycling of blast-furnace slag in the cement industry. The analysis of the three main materials of the cement (ordinary Portland cement, blast-furnace slag, and the alternative raw materials), resulted in the ordinary Portland cement having the highest concentration of heavy metals. Also, it is concluded that the heavy metal content of blast-furnace slag cement is mainly attributed to the content of ordinary Portland cement. As the content of furnace slag during the manufacture of cement increases, the overall heavy metal content of the furnace slag cement becomes low. This was highly evaluated as a resource in the cement-production process, in respect of the effective recycling of resources and the safe management of hazardous materials.

Abstract
 I. 서 론
 II. 연구내용 및 방법
  1. 시료의 조제
  2. 분석방법
 III. 결과 및 고찰
  1. 고로슬래그 시멘트와 보통 포틀랜드 시멘트 성분비교
  2. 중금속 분석결과
  3. 혼합비율에 따른 중금속 변화
 IV. 결 론
 References

• 김용준(국립환경과학원 자원순환연구과) | Yong-Jun Kim (Resource Recirculation Research Division, Environmental Resources Research Department, National Institute of Environmental Research)
• 엄남일(국립환경과학원 자원순환연구과) | Nam-Il Uhm (Resource Recirculation Research Division, Environmental Resources Research Department, National Institute of Environmental Research)
• 김우일(국립환경과학원 자원순환연구과) | Woo-Il Kim (Resource Recirculation Research Division, Environmental Resources Research Department, National Institute of Environmental Research)
• 오정근(국립환경과학원 자원순환연구과) | Jung-Keun Oh (Resource Recirculation Research Division, Environmental Resources Research Department, National Institute of Environmental Research)
• 신선경(국립환경과학원 자원순환연구과) | Sun-Kyoung Shin (Resource Recirculation Research Division, Environmental Resources Research Department, National Institute of Environmental Research)
• 이영기(국립환경과학원 자원순환연구과) | Young-Kee Lee (Resource Recirculation Research Division, Environmental Resources Research Department, National Institute of Environmental Research)
• 김기헌(국립환경과학원 자원순환연구과) | Ki-Heon Kim (Resource Recirculation Research Division, Environmental Resources Research Department, National Institute of Environmental Research) Corresponding author