• 콘크리트학회논문집
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• 제13권2호
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• pp.114-122
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• 2001

본 연구는 제지 슬러지 소각재의 보다 근본적이고 장기적인 처리방안으로 인공경량골재를 제조하여 고부가 자원으로의 개발과 대량으로 처리할 수 있는 기술에 관한 연구이다. 따라서 배합비, 성형 및 소성조건을 달리하여 골재를 제조하고 이에 따른 골재의 물성을 평가하고자 하였다. 실험결과 제지 슬러지 소각재 단독으로는 인공경량골재의 원료로 부적합하여 점토, 플라이 애쉬 등의 부원료의 첨가가 필요하였으며, 적정 배합비는 제지 슬러지 소각재 30~50 % , 점토 30~50 %, 플라이애쉬 0~40 %, 제지 슬러지 0~10 %, 산화철 2~3% 이었다. 또한 본 배합비를 이용하여 절건 비중이 약 0.6~l.4의 다양한 경량골재 제조가 가능하였다. 골재의 물성 시험 결과 10% 세립치 파쇄강도 및 흡수율은 5~10 ton 및 10~20%로 나타나 골재의 물성은 비구조용 및 구조용 인공경량골재로 적합하였으며, 외국제품에 비해서도 거의 동등한 물성을 나타내었다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 1999년도 봄 학술발표회 논문집
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• pp.513-520
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• 1999

20 million tons of coal ash has been produced in Korea annually. This causes the environmental problems and the cost of land for ash pond. However the amount of coal ash for recycling is small because of the low level of recycling technology and the ignorance. As the coal ash has the significant engineering properties, it can be utilized as soft ground stabilizer, backfill materials and so forth. The purpose of this paper is to summarize some of the recycling methods of coal ash. One is structural backfill materials, the other is flowable fill. Optimal mixture ratio(fly ash : bottom ash) is determined for structural backfill materials and the model test is performed. The model test accompanied with physical tests were executed for identifying that the flowable fly ash can be used as fill materials such as trench back filling.

• 한국지반환경공학회 논문집
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• 제3권2호
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• pp.23-33
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• 2002

산업부산물인 제지회의 연약지반 표층고화처리 등을 목적으로 하는 지반개량재로써의 활용가능성을 모색하였다. 100% 제지회와 강도증진 등을 위한 2차 첨가재로써 시멘트 및 소량의 황산염(sulfate)성분을 첨가한 각각의 제지회 혼합토에 대하여 일축압축강도, 전자주사현미경관찰, pH분석 등을 수행하였다. 모든 경우에 있어서 양생이 진행됨에 따라서, 혼합비의 증가에 따라서, 혼합토의 강도는 증가하나 혼합초기에 거의 대부분의 강도가 발현되며 강도증가 효율면에서는 흙과의 혼합비가 9% 내외에서 최대 효율을 나타낸다. 제지회만을 사용하는 경우에 비하여 제지회에 함유된 시멘트량이 10~30%까지는 약 2배의 강도가 증가하며 시멘트 함유량이 40%일 경우에는 5~8배 정도 강도가 증가한다. 포졸란 반응 및 수화물의 생성에 유리한 환경을 나타내는 조건은 시멘트 함유량이 20%이상의 제지회를 7%이상 흙과 혼합했을 경우이다. 제지회만을 사용하는 경우에는 수화반응 또는 포졸란 반응이 활발하지 못하며, 흙과의 혼합비가 10% 이상에서 활발하게 유산석회수화물이 생성된다.

• 한국지반환경공학회 논문집
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• 제4권2호
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• pp.47-56
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• 2003

인구증가와 산업발달로 인해 산업폐기물의 발생량은 매년 증가하고 있으며, 이들 폐기물 중 제지회의 발생량도 증가하고 있다. 산업폐기물을 재활용할 수 있다면 경제적 환경적으로 유익할 것이다. 따라서, 본 연구에서는 일련의 실내실험을 통하여 기본특성, 다짐, 압밀, 투수 및 압축강도 특성을 분석하여 제지회를 건설재료로서 활용하기 위한 방안을 연구하였다. 본 실험에서 콘크리트 벽돌과 점토 벽돌의 품질을 평가하기 위하여 제지회의 치환률을 2, 4, 6, 8, 10, 12, 14, 16, 18, 20%로 하여 제작한 콘크리트 벽돌과 제지회의 치환률을 5, 10, 15, 20, 25, 30%로 변화시키면서 제작한 점토 벽돌을 사용하였다. 시험결과, 콘크리트 벽돌과 점토 벽돌의 품질기준을 만족하는 제지회의 최대 치환률은 각각 11.5%와 12%로 나타났다.

• 한국농공학회논문집
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• 제46권5호
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• pp.99-106
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• 2004

Although fly ash has possesses viable engineering properties, an overwhelming majority of fly ash from coal combustion is still placed in storage or disposal sites. This study was undertaken to investigate the physical and mechanical properties of clay-fly ash mixture and to furnish engineering data when fly ash utilized as engineering materials. This paper includes geotechnical properties of fly ash, clay-fly ash mixtures and results of compaction test, unconfined strength test, direct shear test, leaching test and stability analysis of clay-fly ash bank slope. If proper amount of fly ash was put in clay, the clay-fly ash mixture has an increase of unconfined strength and stability of bank slope.

• Computers and Concrete
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• 제21권2호
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• pp.157-166
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• 2018

This article presents the flexural behaviour of reinforced fly ash (FA)-based geopolymer concrete (GPC) beams with partial replacement of FA for about 10% by weight with paper sludge ash (PSA). The beams were made of M35 grade concrete and cured under three curing conditions for comparison viz., ambient curing, external exposure curing, and oven curing at $60^{\circ}C$. The beams were experimentally tested at the 28th day of casting after curing by conducting two-point loading flexural test. Performance aspects such as load carrying capacity, first crack load, load-deflection and moment-curvature behaviours of both types of beams were experimentally studied and their results were compared under different curing conditions. To verify the response of reinforced GPC beams numerically, an ANSYS 13.0 finite element program was also used. The result shows that there is a good agreement between computer model failure behaviour with the experimental failure behaviour.

• 한국자원리싸이클링학회:학술대회논문집
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• 한국자원리싸이클링학회 2001년도 정기총회 특별강연 및 춘계학술연구발표회(2)
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• pp.19-22
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• 2001

In recent years, the creation of waste recycling society has been required to cope with the traditional ways of waste treatments. In accordance with the package recycling law in force, calls for the developments of new waste treatment techniques suitable for 21st century are growing higher. A new ash melting furnace system named Eco Burner Ash Melting Furnace System has been developed. It is a burner type ash melting system in which the fluffs made of the plastics segregated from municipal solid wastes are directly fired at high temperature in the furnace. This system provides an economical ash melting system because plastic wastes or paper scraps that have heretofore been considered hard to recycle are used in compensation for fossil fuel. In this paper, we describe the ash melting test results obtained from a substantiative facility.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2015년도 춘계 학술논문 발표대회
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• pp.164-165
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• 2015

Recently, the reason of using foamed concrete is for core of panel, filler of construction material to give lightness. However, cement causes environmental problem. The cement generates CO₂ but we normally use cement during manufacturing foamed concrete. Accordingly, this study focuses on dynamic properties of matrix according to the addition ratio of paper ash to make lightweight matrix with blast furnace slag and paper ash which are industrial by-product. The experiment progessed in order to select th optimum mixing ratio of the blast furnace slag and paper ash. There are totally 7 levels such as B100:P0, B95:P5, B90:P10, B85:P15, B80:P20, B75:P25, B70:P30 in this study. As a result of the test, B95:P5 matrix has the best density and compressive strength.

• International Journal of Concrete Structures and Materials
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• 제8권3호
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• pp.251-258
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• 2014

The use of sustainable technologies such as supplementary cementitious materials, and/or recycled post-consumer environmental wastes is widely used in concrete industry in the last decade. This paper presents the results of a laboratory investigation of normal concrete containing sustainable technologies. Twenty one mixtures (21) were prepared with different combinations of silica fume, fly ash, olive's seed ash, and corncob ash (CCA). Fresh and hardened concrete properties were measured, as expected the inclusion of the sustainable technologies affected both fresh and hardened concrete properties. Based on the results obtained in this study and the analyses conducted, the following observations were drawn: replacing the cement by olive's seed ash or CCA has a significant effect on fresh concrete workability. Olive's seed ash increased the slump by more than 200 % compared to the control mixtures. The compressive strength of mixtures containing olive's seed ash showed by 45 and 75 % decrease compared to the control mixtures. The 28 days compressive strength of mixtures produced by CCA of 10 % replacement decreased by 41 % compared to the control mixture.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1998년도 봄 학술발표회 논문집(I)
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• pp.111-116
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• 1998

This studies regarding development of product system on artificial aggregate using of Paper Sludge Ah that waste production at paper-making mill, expecially this paper describes development of product system using centrifugal mixer plant. The skills of this product system on artificial aggregate using of Ash can be spread Fly-Ash, powder and fine aggregate(under 5mm) of waste concrete reuse.