• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2003년도 봄 학술발표회 논문집
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• pp.79-82
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• 2003

In this study, non-sintering cement is produced by only blending granulate blast furnace slag with phosphogypsum as main materials, and small amounts of hydrate lime or waste lime as activators. This paper was investigated physical properties of fresh concrete and hardened concrete using non-clinker cement according to various mixing ratio. Results obtained from this study have shown that concrete using non-clinker cement could be used for structural concrete and concrete 2th production as binder.

• 에너지공학
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• 제27권1호
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• pp.51-58
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• 2018

In this paper, we reported that the influence of advanced functional mineral filler calcium carbonate ($CaCO_3$) extracted from oyster shell waste, which are rich mineral sources of $CaCO_3$. Oyster Shells, available in abundance, have no eminent use and are commonly regarded as waste. Their improper disposal causes a significant level of environmental concern and also results in a waste of natural resources. Recycling shell waste could potentially eliminate the disposal problem, and also turn an otherwise useless waste into high value added products. Oyster shell waste calcination process to produce pure lime (CaO) which have good anti-microbial property for waste water treatment and then focuses on its current applications to treat the coffee waste and its effluents for biological treatment and utilization as a fertilizers.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2004년도 총회 및 춘계학술발표회
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• pp.260-265
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• 2004

Acid mine drainage(AMD) is one of the most serious environmental concerns associated with the mining industry around the world. The objective of this study is to assess the potential of sewage sludge as a carbon source for sulfate reducing bacteria and waste lime and steel slag as a neutralize agent for acid mine drainage bioremediation for use in permeable reactive materials. The study was performed using synthetic AMD in six column experiments. The effluent solution was systematically analysed throughout the experiments. The results of the study indicated that sewage sludge, waste lime and steel slag were the most effective for the AMD treatment as a permeable reactive materials.

• 한국토양비료학회지
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• 제49권3호
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• pp.287-292
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• 2016

The objectives of this study were to investigate the effects of soil neutralizing treatments on soil characteristics and growth of Aster koraiensis in the acid soil of abandoned metal mine for selection of proper neutralizer. The most effective neutralizers were acid mine drainage sludge, waste lime + oyster and compost. Those neutralizing treatments showed promoting growth of Aster koraiensis. According to this study, it is applicable of acid mine drainage sludge, waste lime + oyster and compost to neutralize acid soil for rehabilitation in abandoned metal mine. However, follow-up study is necessary to calculate proper ratio of each neutralizer.

• 한국지반신소재학회논문집
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• 제7권1호
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• pp.39-44
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• 2008

최근 경제가 성장함에 따라 산업지역과 거주지의 요구가 증가하고 있다. 그러나 양질의 지반상태 지역을 구하기가 어렵다. 경제적이고 균형적인 지역 발전을 위하여 내륙지역 뿐만 아니라 연약지반에도 새로운 프로젝트가 수행되고 있다. 연약지반은 복잡한 공학적 특성과 강도가 낮고 대상 지역의 심도가 깊은 많은 변수를 가지고 있기 때문에 연약지반의 공학적 특성을 정확하게 분석하고 안정적인 계측과 경제적인 설계와 관리방법을 찾는것이 필요하다. 연직배수공법은 프리로딩과 통수능력을 가진 여러 종류의 배수재를 사용하여 연약지반과 퇴적지반의 압밀촉진을 위하여 많이 사용되고 있다. 본 논문에서는 폐석회 지반에 2가지 형태의 연직배수재를 적용하여 통수능력 분석하였다.

• 한국건축시공학회지
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• 제18권3호
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• pp.305-312
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• 2018

This study is about the development of a non-sintered binder (NSB) which does not require a sintering process by using the industrial by-products Phosphogypsum (PG), Waste Lime (WL) and Granulated Blast Furnace Slag (GBFS). In this report, through SEM analysis of the NSB paste hardening body, micropore analysis of paste using the mercury press-in method and microstructure observation were executed to consider the influence of the formation of the pore structure and the distribution of pore volume on strength, and the following conclusions were reached. 1) Pore structure of NSB paste of early age is influenced by hydrate generation amount by GBFS and activator. 2) Through observing the internal microstructure of NSB binder paste, it was found that the strength expression at early age due to hydration reaction was achieved with a large amount of ettringite serving as the frame with C-S-H gel generated at the same time. It was confirmed that C-S-H gel wrapped around ettringite, and as time passed, the amount generated continually increased, and C-S-H gel tightly filled the pores of hardened paste, forming a dense network-type web structure. 3) For NSB-type cement, the degree of formation of gel pores below $10{\mu}m$ had a greater influence on strength improvement than simple pore reduction by charging capillary pores, and the pore size that had the greatest effect on strength was micropores with diameter below $10{\mu}m$.

• Environmental Engineering Research
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• 제21권4호
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• pp.341-349
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• 2016

To improve the utilization rate of construction waste as mine backfilling materials, this paper investigated the feasibility of using recycled powder as mine paste backfilling cementitious material, and studied the pozzolanic activity of recycled construction waste powder. In this study, alkali-calcium-sulfur served as the activation principle and an orthogonal test plan was performed to analyze the impact of the early strength agent, quick lime, and gypsum on the pozzolanic activity of the recycled powder. Our results indicated that in descending order, early strength agent > quick lime > gypsum affected the strength of the backfilling paste with recycled powder as a cementitious material during early phases. The strength during late phases was affected by, in descending order, quick lime > gypsum > early strength agent. Using setting time and early compressive strength as an analysis index as well as an extreme difference analysis, it was found that the optimal ratio of recycled powder cementitious material for mine paste backfilling was recycled powder:quick lime:gypsum:early strength agent at 78%:10%:8%:4%. X-ray diffraction analysis and scanning electron microscope were used to show that the hydration products of recycled powder cementitious material at the initial stages were mainly CH and ettringite. As hydration time increased, more and more recycled powder was activated. It mainly became calcium silicate hydrate, calcium aluminate hydrate, etc. In summary, recycled powder exhibited potential pozzolanic activities. When activated, it could replace cementitious materials to be used in mine backfill.

• 공업화학
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• 제24권4호
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• pp.382-390
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• 2013

소다석회 조성의 폐 병유리를 대상으로 효율적인 재활용방안을 찾기 위해서 발포화에 적절한 조성의 조절을 통해 직접 보온단열재 발포유리블럭을 제조할 수 있는 공정을 조사하였다. 폐 병유리의 직접 발포화를 위해 첨가되는 성분 및 조성은, 폐 유리분말 100중량부에 대하여 $SiO_2$ 10중량부, $Na_2SO_4$ 0.5중량부, $B_2O_3$ 3.0중량부, 그리고 발포제로서 카본 블랙류 탄소재 0.3중량부이다. 발포공정은 턴넬키른에서 진행하며, 발포소성 조건은 폐 유리분말의 입도는 -325 mesh, 발포소성온도는 $830{\sim}850^{\circ}C$, 발포시간은 30~35 min이 바람직하다. 상기 조건하에 제조된 발포체는 밀도가 $0.17{\sim}0.21g/cm^3$, 열전도도 $0.06{\pm}0.005kcal/h{\cdot}m{\cdot}^{\circ}C$, 수분 흡수율 1.1~1.5%, 압축강도는 $20{\sim}30kgf/mm^2$의 물성을 나타내었다.

• 한국지반공학회논문집
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• 제20권2호
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• pp.97-105
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• 2004

본 연구에서는 석회부산물의 재활용 방안으로 경량성토재, 뒤채움재 및 경량블록의 활용방안을 종합적인 실험연구를 통해 수행하였다. 이를 위하여 본 연구에서는, 석회부산물, 성토용 토사 및 폐 EPS 조각을 혼합한 새로운 형태의 경량성토계 및 이에 시멘트 고화제를 첨가한 경량블록을 고안하였고, 다양한 배합비로 제작된 경량혼합토 및 경량블록에 대한 시료에 대하여 종합적인 시험을 실시하여 물리적, 지반공학적 및 환경적 특성을 분석하였다. 또한 경량블록에 대하여 국내 용출시험법(KMS Method)을 실시하여 화학성분의 농도변화에 대하여 평가하였다. 본 연구는 석회부산물 처분의 문제에 대하여 해결을 기대할 수 있으며 뿐만 아니라 성토재 및 블록에 대하여 석회부산물의 재활용 방안을 기대할 수 있다.

• 한국토양비료학회지
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• 제17권1호
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• pp.51-54
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• 1984

석회(石灰)를 첨가(添加)한 맥주오염(麥酒汚泥)를 신개간지(新開墾地) 토양(土壤)에 직접시용(直接施用)하고 옥수수에 대(對)한 비교(肥效)를 검토(檢討)한 결과(結果)는 다음과 같다. 전토양(田土壤)에서 석회(石灰)를 첨가(添加)한 맥주오염(麥酒汚泥)의 무기화(無機化)는 생오염(生汚泥)에 비(比)하여 빨랐으며 이는 석회첨가(石灰添加) 오염(汚泥)의 C/N율(率)이 낮고 Ca함량(含量)이 높았던 것에 기인(基因)된 것 같다. 맥주오염(麥酒汚泥) 시용량(施用量)이 증가(增加)할수록 생육상황(生育狀況)이 양호(良好)하고 수량(收量)이 증가(增加)되었으며 토양중(土壤中) 질소(窒素) 및 유기물(有機物) 함량(含量)도 같은 경향(傾向)이었다. 그러나 석회첨가(石灰添加) 오염(汚泥)에서 암모니아태(態) 질소(窒素) 휘산(揮散)이 높은 것으로 판단(判斷)되어 생오염(生汚泥)가 유기자원(有機資源)으로서는 더 유망(有望)한 것으로 보인다.