• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2015년도 추계 학술논문 발표대회
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• pp.11-12
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• 2015

This study analyzed sulfate resistance of strongly acid-resistant inorganic binder based on industrial byproducts. According to the study experiment, compared to OPC mixture, the mixture of high acid-resistant inorganic binder had excellent chemical resistance against 10% H₂SO₄ solution. In the case of ordinary portland cement, its sample with 28 days of immersion had severe corrosion on its mortar erosion part, and thus external appearance was damaged greatly, and compression strength decreased by around 57% and more.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1993년도 봄 학술발표회 논문집
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• pp.79-88
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• 1993

The purpose of this study is to provide a firm base for the quality improvement of high strength concrete and the development of ultra high strength concrete as well as enviromental con-servation and utilization of byproducts from industrial processing such as Fly ash and Silica fume. A comprehensive experimental study was performed to investigate the effects on the quality improvement of high strength concrete using mineral admixtures. As results, 400~500kg/$\textrm{cm}^2$ compressive strength and excellent flowability can be obtained if fly ash is replaced with cement in the range of 305. In case of using powder type silica fume, 600~700 kg/$\textrm{cm}^2$ compressive strength is showed and 600~800kg/$\textrm{cm}^2$ compressive strength cam be obtained with liquid type silica fume. But it is necessary to increase dosage of high range water reducer for flowability using powder type silica fume. Especially, higher strength concrete cam be obtained when maximum size of coarse aggregate is lower than 25mm.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2003년도 추계학술발표회
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• pp.431-434
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• 2003

Environmental pollution problems due to the wastes from various industrial facilities and activities have become a serious issue. The specific problem associated with heavy metals in the environment is their accumulation in the food chain and their persistence in nature. Present work investigates the possible uses of by-products for the removal of heavy metal ions. Heavy metals used in these studies were cadmium, lead and copper. Experiments were conducted with by-products such as oyster shell and fly ash to evaluate their sorption characteristics. The results of the study indicate that oyster shell can be properly used as an adsorbent for heavy metals because of its outstanding removal rate.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2016년도 춘계 학술논문 발표대회
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• pp.132-133
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• 2016

The Present that environmentally friendly policies at issue in the world recently, construction sector and other sectors are working on reducing CO₂. Cement production during in the construction sector, CO₂ is being caused in large quantities. Therefore, this study was secure the basic date that not use cement and use blast furnace slag and fly ash HFA, polysilicon in industrial byproducts about cement non-cement matrix.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2005년도 봄학술 발표회 논문집(II)
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• pp.129-132
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• 2005

Reclamation coal ash, which is generated as a byproduct at a coal thermal power plant is not recycled but dumped into an ash landfill disposal site. Furthermore, various byproducts and wastes have been proposed for use from the point of reduction in the environmental load. Authors have started research to develope manufacturing technology of concrete mixture design method with large amount of land reclamation coal ash. In this study an optimum mix proportion design for utilizing the reclamation coal ash and containing copper slags as an aggregate for secondary concrete products such as a wave dissipating blocks was successfully developed.

• Metals and materials international
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• 제24권6호
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• pp.1327-1332
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• 2018

In this study, a novel approach to the explosive synthesis of titanium carbide (TiC) is discussed. Nonstoichiometric $TiC_x$ powder was produced via the underwater explosion of a Ti powder encapsulated within a spherical explosive charge. The explosion process, bubble formation, and synthesis process were visualized using high-speed camera imaging. It was concluded that synthesis occurred within the detonation gas during the first expansion/contraction cycle of the bubble, which was accompanied by a strong emission of light. The recovered powders were studied using scanning electron microscopy and X-ray diffraction. Submicron particles were generated during the explosion. An increase in the carbon content of the starting powder resulted in an increase in the carbon content of the final product. No oxide byproducts were observed within the recovered powders.

• International Journal of Industrial Entomology and Biomaterials
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• 제48권1호
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• pp.19-24
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• 2024

For over five millennia, humans have benefited from the valuable byproducts of Bombyx mori silkworms nourished on mulberry leaves and a multitude of potential applications remains available due to the diverse array of silkworm varieties. In this work, we discuss the utilization of Daehwangjam (DHJ), golden silk (GS), and Juhwangjam (JHJ), distinctive colored silks found in Korea, as chemosensors. These novel silks emit fluorescence under external stimuli and show a diminishing fluorescence intensity when exposed to HCl vapor. The considerable surface-to-volume ratio of these cocoons allows for the identification of 5 ppm, 300 ppm, and 3000 ppm HCl vapors through decreased fluorescence intensity. The results show the suitability of natural DHJ, GS, and JHJ for applications in biosensing applications.

• 한국건설순환자원학회논문집
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• 제6권2호
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• pp.130-137
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• 2018

건설 산업분야에서는 시멘트를 전혀 사용하지 않고 플라이애쉬 또는 고로 슬래그 미분말을 이용한 알칼리 활성화 시멘트에 대한 연구가 활발히 이루어지고 있다. 본 논문에서는 보통 포틀랜드 시멘트 관리에 사용되는 화학적 정량 분석을 알칼리 활성화 슬래그 시멘트의 화학적 정량분석 결과에 적용하여 알칼리활성화 슬래그 시멘트의 역학적 성능에 미치는 영향을 최소화 하고 최적 화학 조성 허용범위를 검토하고자 하였다. 그 결과 수경율 및 석회포화도의 비율 및 계수는 모두 일정한 범위 내에 있음이 확인되었다.

• 한국기계가공학회지
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• 제17권4호
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• pp.9-16
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• 2018

Recently, the demand for eco-friendly parts has increased to reduce materials and parts that use fossil fuels. This has exacerbated the increase of energy prices and the enforcement of regulations by environmental agencies. Currently, polylactic acid (PLA) is a solution, as a common and eco-friendly material. PLA is a biodegradable material that can replace traditional petrochemical polymers. PLA has great advantages since it is resistant to cracking and shrinkage. When it is manufactured, there are few harmful byproducts. Improvement in the brittleness characteristics is another important task to be monitored throughout the production of industrial parts. Improvement in the brittleness property of products lowers the tensile strength and tensile elasticity modulus of the parts. This study focused on the mechanical properties of 3D-printed PLA parts. Tensile tests are performed while varying the infill print parameters to evaluate the applicability of PLA in several industrial areas.

• 한국건설순환자원학회논문집
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• 제3권3호
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• pp.268-276
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• 2015

본 논문에서는 탄소저감을 위한 산업부산물 사용 증대 및 시공성능 향상을 위하여 시멘트 사용량을 80% 이상 감소시킨 탄소저감형 4성분계 고유동 콘크리트를 제조하여 품질특성, 및 탄소저감 성능을 수행하였다. 탄소저감형 4성분계 고유동 콘크리트의 품질특성 평가를 수행한 결과 다량의 산업부산물을 혼합하여 시멘트 사용량을 80% 이상 감소시킨 배합에서 목표 성능을 만족하는 품질을 얻을 수 있었으며, 유동특성, 역학특성 및 내구특성의 경우 기존 기준 배합과 비교하여 다소 성능이 감소되는 경향이 나타났지만 소요 성능 수준 이상의 성능을 만족할 수 있는 것으로 판단된다. 또한, 탄소저감형 다성분계 고유동 콘크리트의 탄소저감 성능을 분석하기 위하여 콘크리트의 전 과정 평가를(LCA) 실시한 결과 기존 기준 배합과 비교하여 약 62.2%의 탄소저감 성능이 있는 것으로 나타났으며, 제조비용의 경우 약 24.5%의 원가 절감이 되는 것으로 나타났다.