• Title/Summary/Keyword: Reactive material

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Solidification of sludge by reactive amendment agent (반응성 고화제를 이용한 슬러지 고형화 방안)

  • Koh, Yong-Kook
    • Proceedings of the Korean Geotechical Society Conference
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    • 2004.03b
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    • pp.869-872
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    • 2004
  • A study on the solidification of sludge by reactive amendment agent was carried out in this paper. The reactive amendment agent used in this study is mainly composed of inorganic solidification agent and reactive adsorptive material. The reactive agent has a function of soil-cement-agent solidification and harmlessness of contaminant in waste. The reactive agent is environmentally friendly material to the surrounding environment. In this study, a series of tests and experiments including unconfined compressive strength, permeability, pH test, constituent analysis, leaching test were carried out to analyse engineering and environmental characteristics of solidified sludge treated reactive agent. The result of this research shows that the solidified sludge treated reactive agent is increased in strength and decreased in contaminant concentration.

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Permeable Reactive Barrier Using Atomizing Slag Material for Waste Contaminant Management

  • Chung Ha-Ik;Kim Sang-Keun;Chang Won-Seok
    • Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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    • 2005.10a
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    • pp.122-122
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    • 2005
  • The remediation for contaminated soil and groundwater in contaminated site and waste site has to be compact and economic in maintaining and operating the system. In this study, the atomized slag was tested if they are an effective reactive material in permeable reactive barrier This novel reactive system technology was applied to the treatment of leachate from unplanned waste landfill. The system was optimized and developed to be commercialized.

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Evaluation on Strength Characteristics of Reactive Materials to Prevent the Diffusion of Organic Pollutants (유기오염물 차단을 위한 반응재료의 강도 특성 평가)

  • Jai-Young Lee;Seung-Jin Oh;Su-Hee Kim;Kicheol Lee;Jeong-Jun Park;Gigwon Hong
    • Journal of the Korean Geosynthetics Society
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    • v.22 no.4
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    • pp.35-42
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    • 2023
  • This paper described the strength variation characteristics to evaluate the applicability of a reactive material that can absorb organic pollutants as an underground barrier. The Strength was evaluated by unconfined compression test. The test results showed that the strength of the reactive material according to the absorption of each pollutant was in the order of water > TCE > TPH. However, the strength of the reactive material absorbing TPH was greater than that of the case absorbing TCE, when the composition ratio of polynorbornene was 12% or less. The strength of the reaction material in contact with water continued to decrease as the polynorbornene composition ratio decreased. The strength of the reaction material in contact with TCE and TPH increased as the polynorbornene composition ratio decreased from 30% to 21%, and then decreased. In other words, the optimal composition ratio of the reactive material should be applied considering the strength due to contact with pollutants according to the stress conditions occurring in the ground.

Film Properties of TiO2 Made by Activated Reactive Evaporation (활성화 반응으로 제작된 TiO2의 박막특성)

  • Park, Yong-Gwon;Choi, Jae-Ha
    • Journal of the Korean Society for Heat Treatment
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    • v.14 no.3
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    • pp.151-154
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    • 2001
  • $TiO_2$ thin film has wide application because of its high capacitanca, reflection, and good transmissivity in visible range. $TiO_2$ thin film can be made by thermal deposition method, reactive evaporation method, activated reactive evaporation(ARE) method. In the case of thermal deposition, the oxygen deficiency can occur because the melting point of Ti is very high. While in the case of reactive evaporation, high density $TiO_2$ can not be made, because reactive gas($O_2$) and evaporated material(Ti) are not fully combined, activated reactive evaporation, $TiO_2$ is easily deposited at lower gas pressure compared with reactive evaporation because the ionized reactive gas is made by plasma. Therefore, activated reactive evaporation is very useful to deposit the material having the high melting point. In this work, we formed $TiO_2$ thin film by activated reactive evaporation method. The surface of $TiO_2$ thin film was analyzed by X-ray photoelectron spectroscopy. The surface morphology which was analyzed by atomic force microscopy(AFM) shows that feature of the film surface is uniform. The dielectric capacitance, withstanding voltage were $600{\mu}F/cm^2$, 0.4V respectively. In further work, we can increase the withstanding voltage by improving the deposition parameter of substrates.

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Analysis of the Correlation between Compaction Characteristics and Spectral Information of Reactive Materials for Absorption of Oil Contaminant (유류 오염물 흡수가 가능한 반응재료의 다짐 특성-분광정보 상관관계 분석)

  • Gigwon Hong
    • Journal of the Society of Disaster Information
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    • v.19 no.4
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    • pp.950-957
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    • 2023
  • Purpose: The response technology is needed to prevent the spill of highly toxic oil contaminants in advance. Therefore, this paper described the results of an experimental study to predict the engineering properties of the developed reactive material. Method: Compaction tests and spectral information acquisition experiments were conducted on the reactive materials, and the results were evaluated. In addition, the correlation between spectral information and maximum dry unit weight was analyzed to evaluate the possibility of predicting the engineering properties for reactive materials. Result: The compaction test results showed that the maximum dry unit weight was in the range of approximately 9kN/m3 to 10kN/m3. The spectral information confirmed that the maximum reflectance decreased as the polynorbornene decreased. Conclusion: It was confirmed that the maximum dry unit weight of the reactive material for absorbing oil contaminants can be predicted using the maximum reflectance according to the component ratio of the reactive material.

Placing Constrained Layer Damping Patches Using Reactive Shearing Structural Intensity in Order to Reduce the Radiated Sound Power of a Air-Conditioner Outdoor Unit (반동 전단 구조 인텐서티 측정에 의한 제진재 적용과 그에 따른 에어컨 실외기 구조 방사 소음 저감)

  • 김규식;강연준;진심원;정인화;이정우
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2003.11a
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    • pp.333-337
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    • 2003
  • The use of reactive shearing structural intensity to place small patches of constrained layer damping material in order to achieve the largest reduction in the radiated sound power of Air-conditioner outdoor unit is described. The normal surface velocity of each panel was measured using a laser doppler vibrometer. Experimental results indicated that patches of constrained layer damping material placed over areas of high reactive structural intensity reduced the radiated sound power significantly more than patches of the same area placed over areas of low reactive structural intensity

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Shock compression of condensed matter using multi-material Reactive Ghost Fluid method : development and application (충격파와 연소 현상 하에서의 다중 물질 해석을 위한 Reactive Ghost Fluid 기법 개발 및 응용)

  • Kim, Ki-Hong;Yoh, Jai-Ick
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.37 no.6
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    • pp.571-579
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    • 2009
  • For the flow analysis of reactive compressible media involving energetic materials and metallic confinements, a Hydro-SCCM (Shock Compression of Condensed Matter) tool is developed for handling multi-physics shock analysis of energetics and inerts. The highly energetic flows give rise to the strong non-linear shock waves and the high strain rate deformation of compressible boundaries at high pressure and temperature. For handling the large gradients associated with these complex flows in the condensed phase as well as in the reactive gaseous phase, a new Eulerian multi-fluid method is formulated. Mathematical formulation of explosive dynamics involving condensed matter is explained with an emphasis on validating and application of hydro-SCCM to a series of problems of high speed multimaterial dynamics in nature.

Dyeing and Fastness Properties of Oak Veneer Dyed with Vinyl Sulfone Type Reactive Dyes (비닐술폰형 반응성 염료를 이용한 오크 무늬목의 염색성 및 견뢰도 특성)

  • Cho, Hang Sung;Shim, Euijin
    • Textile Coloration and Finishing
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    • v.34 no.4
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    • pp.234-240
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    • 2022
  • Use of processed timber can help reduce environmental damage and the economic burden of resources (important problems with use of raw timber) and can meet the needs of various fields where the sensibility of raw timber is required. Veneer wood is positioned as a high-value-added product due to its luxury and beauty, and it is used in various fields as a building-related material, such as interior decoration, furniture, flooring, building interior materials, and lumber. Dyeing is necessary to enhance the aesthetic appearance of this pattern and to expand its use. Therefore, in this study, we compared and analyzed the dye ability of oak-patterned materials with reactive dyes, and evaluated their performance as interior materials. As a result, the oak pattern was dyed with 9 kinds of reactive dyes and a comparative analysis was performed. The most suitable conditions are 50℃, 2 hours, and 0.5% o.w.f. In addition, evaluating resilience to daylight, resilience to rubbing, fire resistance, and flame retardance, yielded results suitable for use as an interior material. In this study, the dyeability of veneer dyed under various conditions using reactive dyes was compared and analyzed the performance as an interior material was evaluated.

The Characteristics of P.H.C Pile using Admixture by Waste TFT-LCD Glass Powder (폐 TFT-LCD 유리분말을 혼입한 고강도 콘크리트 파일의 특성)

  • Jeon, Seong-Hwan;Min, Kyung-San;Soh, Yang-Seob
    • Journal of the Korean Ceramic Society
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    • v.47 no.5
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    • pp.419-425
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    • 2010
  • In order to examine the P.H.C pile raw material using glass forming ceramic. The used materials is ordinary portland cement, waste TFT-LCD glass powder and reactive agent(Ca$(OH)_2$). The first experiment is characteristics analysis of the waste TFT-LCD glass powder, For the second experiment is mortar and concrete compressive strength for using of the concrete file raw material for waste TFT-LCD glass powder. The results of experiment showed that the substitution ratio of 10% waste TFT-LCD glass powder and 1% reactive agent(Ca$(OH)_2$) was excellent at a point of view for the physical characteristic. The study's most important finding is that the recycling of waste TFT-LCD glass powder.

Reduction of Harmonics and Compensation of Reactive Power about Wind Power Generation System Connected to Grid (계통 연계형 풍력발전 시스템의 고조파 저감 및 무효전력 보상)

  • Kim, Yeong-Min;Hwang, Jong-Sun;Kim, Jong-Man;Park, Hyun-Chul;Song, Seung-Ho
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2002.07b
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    • pp.1093-1096
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    • 2002
  • In this paper, a novel multi voltage inverter system is proposed for reductions of harmonics, which can compensate reactive power. At first, we remove capacitor at input side for reactive power compensation. Secondly, by adding DC voltage to the filter capacitor, it can control power factors as lead-phase according to alterations of loads at power reception. Thirdly, if winding and single phase-bridge inverter(auxiliary circuit) is installed to DC power for reduction of harmonic, waveform of output voltages become to 36-steps. Thus, SVC(static var compensator) systems which can reduce harmonics are designed.

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