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Application of Powdered Waste Glasses and Calcium Carbonate for Improving the Properties of Artificial Lightweight Aggregate Made of Recycled Basalt Powder Sludge

현무암 석분 슬러지를 재활용한 인공경량골재의 물성개선을 위한 폐유리분말과 탄산칼슘의 활용

  • Park, Soo-Je (Department of Biology, Jeju National University) ;
  • Lee, Sung-Eun (Department of Equine Resource, Cheju Halla University) ;
  • Choi, Heebok (Department of Architectural Engineering, Jeju National University)
  • Received : 2014.01.08
  • Accepted : 2014.03.23
  • Published : 2014.06.20

Abstract

This study was carried out to investigate the manufacturability of artificial lightweight aggregate as a way to recycle basalt powder sludge, which is a waste produced during the manufacturing process of basalt in Jeju. Powdered waste glasses and calcium carbonate are used to improve the characteristics of manufactured artificial lightweight aggregate. Especially, considering the complex factors of basalt powder sludge, powdered waste glasses, and sintering method, the amount of calcium carbonate is appropriate at the 9 wt.% in order to improve the intumescent of lightweight aggregate. Also, the amount of powdered waste glasses is effective with using less than 50 wt.% and applying the direct sintering method at the same time on decreasing the absorption of lightweight aggregate. Furthermore, in order to manufacture artificial lightweight aggregate of high quality with a low specific gravity and low water absorption, it is considered to be more effective to apply the direct sintering method after the surface of artificial lightweight aggregate is covered with powdered waste glasses.

본 연구는 최근 제주도 지역내 현무암 가공과정에서 발생되는 폐기물인 석분슬러지를 재활용하기 위한 방안으로서, 인공경량골재의 제조가능성에 대해 실험하였다. 또한, 현무암 석분 슬러지로 제조된 인공경량골재의 물성을 개선하기 위해 폐유리분말과 탄산칼슘이 사용되었다. 현무암 석분 슬러지와 폐유리분말 그리고 소성방법의 복합적인 요인을 고려할 때 경량골재 내부의 발포성 향상을 위해서 탄산칼슘의 양은 9 wt.%가 적당하였다. 또한, 제조된 인공경량골재의 흡수율을 저하시키기 위해서는 폐유리 분말은 50 wt.%이내로 사용함과 동시에 직화소성의 방법을 적용하는 것이 더 효과적이다. 좀 더 낮은 비중과 흡수율을 가진 고품질의 인공경량골재를 성형하기 위해서는 성형된 경량골재의 표면에 폐유리분말을 도포한 후 그 시료를 직화소성법으로 소성하는 것이 더 효과적일 것으로 판단된다.

Keywords

References

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