• Title/Summary/Keyword: Waste Oyster Shell

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A Study on Strength Properties of Mortar According to Mass ratio change using Oyster shell as Aggregate (굴 패각을 잔골재로 사용한 모르타르의 질량비 변화에 따른 강도특성에 관한 연구)

  • Jung, Ui-In;Yu, Nam-Gyu;Hong, Sang-Hun;Kim, Bong-Joo;Won, Chul-Hee;Choi, Ho-Rim
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2016.10a
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    • pp.156-157
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    • 2016
  • Oyster shell is produced by shucking process in oyster farming in southern coast of Korea. In average, about 6.7kg of oyster shell is produced as an industrial waste for 1kg of oyster flesh, and even only in last year, it is estimated that about 150,000 ton of oyster shell is produced. Oyster shell is light weighted and the strength characteristic of it is similar to sand. So we produced mortar test using different law of multiple proportions of grounded oyster shell powder of its particle size according to fine aggregate standard and reviewed strength Properties.

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A Study on Strength Properties of Mortar using Oyster shell as Aggregate (굴 패각을 골재로 사용한 모르타르의 강도특성에 관한 연구)

  • Jung, Ui-In;Yu, Nam-Gyu;Heo, Min-Hoe;Kim, Bong-Joo;Won, Chul-Hee;Park, Jung-Hun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2016.05a
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    • pp.193-194
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    • 2016
  • Oyster shell is produce by shucking process in oyster farming in southern coast of Korea. In average, about 6.7kg of oyster shell is produced as an industrial waste for 1kg of oyster flesh, and even only in last year, it is estimated that about 150,000 ton of oyster shell is produced. Oyster shell is light weighted and the strength characteristic of it is similar to send. So we produced mortar test piece using grounded oyster shell powder under 5mm of its particle size according to fine aggregate standard and reviewed strength Properties.

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A Study on the Strength Properties for Mortar using Oyster shell of Fiber Addition (굴 패각을 채움재로 사용한 모르타르의 섬유 혼입에 따른 강도특성에 관한 연구)

  • Jung, Ui-In;Hong, Sang-Hun;You, Nam-Gyu;Kim, Bong-Joo
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2017.11a
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    • pp.94-95
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    • 2017
  • Oyster shell is produce by shucking process in oyster farming in southern coast of Korea. In average, about 6.7kg of oyster shell is produced as an industrial waste for 1kg of oyster flesh, and even only in last year, it is estimated that about 150,000ton of oyster shell is produced. Oyster shell is light weighted and the strength characteristic of it is similar to send. We produced mortar test piece using grounded oyster shell powder according to Filler and Fiber. So I wanted to measure the strength and use it as a baseline for follow-up studies.

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A Study on Strength Characteristic as the Fineness Modulus and Curing Method of Oyster shells (굴 패각의 조립률 및 양생방법에 따른 강도특성에 관한 연구)

  • Jung, Ui-In;Hong, Sang-Hun;You, Nam-Gyu;Song, Seung-Li;Kim, Bong-Joo
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2018.05a
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    • pp.62-63
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    • 2018
  • Oyster shell is produce by shucking process in oyster farming in southern coast of Korea. In average, about 6.7kg of oyster shell is produced as an industrial waste for 1kg of oyster flesh, and even only in last year, it is estimated that about 150,000 ton of oyster shell is produced. Oyster shell is light weighted and the strength characteristic of it is similar to send. So we produced mortar test piece using grounded oyster shell according to aggregate and reviewed strength characteristic. Therefore, in this study, the strength characteristics of the test specimen are evaluated by artificially altering fineness modulus and curing method by processing oyster shells.

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A Study on the Development of Soil Neutrailizing-agent using Waste Materials (Waste-lime, Oyster, Bottom-ash) (폐자원(폐석회, 굴패각, 바닥재)을 이용한 토양 중화제 개발 연구)

  • Oh, SeungJin;Cho, Mihyeon;Park, Chan-O;Jung, Moon-Ho;Lee, Jai-Young
    • Journal of Soil and Groundwater Environment
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    • v.17 no.6
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    • pp.92-101
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    • 2012
  • Korea shows the soil pH is 5.8 ~ 6.2 by many factors including the geological structure and climate condition. There is known as the cause for soil acidification by weathering of the mineral, excessive use of the chemical fertilizer, and extensively diffused acid rain. The purpose of research is environmentally-friendly material neutralization technology development utilizing the waste resources against by acid soil. The experiment analyze the physico-chemical property of the acid soil and waste resource materials (waste lime, oyster shell, bottom ash). The Batch-Test was performed under 3 stage. As a result, the acid soil showed up acid soil about 3.19. And waste lime, oyster, bottom ash showed the alkalinity with 9.62, 10.08, 9.17. In case of 1 batch-test experimental result, waste lime and oyster shell, the alkalinity was shown over 7.5 and the good efficiency was showed, on the other hands, the bottom ash showed the pH 4 the neutralization efficiency which is low. waste resource materials to be applied to 2 steps was chosen as the waste lime except the bottom ash and oyster. In 2 step batch-test experiment, it was exposed to be the most appropriate in case of doing the combination ratio of the waste lime and oyster shell with 9 : 1. It was exposed to be efficient most in the effeciency and aspect of economical efficiency combination ratio of the soil and materials was 9.6 : 0.6 with 3 step batch-test experimental result.

A study on the Effect of Agricultural Industry Supporter for Durability using Waste Shell such as Crassostrea gigas (패각을 이용한 농업용 지속성 담지체의 효과에 대한 연구)

  • Oh, Eun-Ha;Kong, Seung-Dae
    • Journal of the Korean Applied Science and Technology
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    • v.27 no.4
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    • pp.427-436
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    • 2010
  • Much oyster shell is breeding by character and conduct of oyster-industry for a long time among them. An experimental study was carried out to investigate the recycling possibility of waste oyster shells, which induce environmental pollutions by piling up out at the open or the temporary reclamation. The purpose of this study is to develope eco-friendly binder using waste oyster shells, and to reinforce soils fur soft soil improvement. In this paper, a series of laboratory tests including compressive pot tests were performed to evaluate characteristics of soils treated by developed waste oyster shells with different water content of soils. Based on test results, eco-friendly Supporter manufactured from waste oyster shells were estimated as good resource materials for soft soil improvements. We got the conclusion by a series of experiment, It is verified that change of pH of soil is improved by mixing with oyster shells. The homogenization method for deducing apparent of oyster shells, which can consider micro-structure of mixed soil, is introduced. The improvement treatment leaded to enlarge fluctuation of soil moisture content. The effect of calcium concentration was good though improvement treatment of physical property. In addition, the crop yield in amelioration plots increased. It means that the increase of crop yield was caused by improvement of soil physical properties rather than improvement of calcium concentration.

Evaluation of strength of waste material mixed concrete using digital image (디지털이미지를 이용한 폐기물 혼합 콘크리트의 강도 평가)

  • Yoon, Hyun-Suk;Lee, Ki-Ho;Park, Jun-Boum
    • Proceedings of the Korean Geotechical Society Conference
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    • 2005.03a
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    • pp.1390-1395
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    • 2005
  • To analyze the effects of oyster shell particles, inserted in the self-hardening matrix such as cement paste, on strength, homogenization analysis using micro structure was used to estimate and assess the apparent elastic modulus of oyster shell particle. DIB modeling technique was used to represent of the micro structure of oyster shell mixed concrete. The results showed that the apparent elastic modulus of LOS (large oyster shell particle) was changed with the amount of LOS inserted. In particular, when the amount of LOS was 200% of the weight of cement, the apparent elastic modulus of LOS tended to decrease rapidly. This could mean that the strength of oyster shell mixed concrete is much affected by LOS inserted material in mixed ratio of 200%.

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Production of Vaterite Type Calcium Carbonate by using Oyster Shell Waste with Lysine (라이신 첨가에 의한 폐 굴껍질 이용 vaterite형 탄산칼슘 제조)

  • Bak, Young-Cheol
    • Korean Chemical Engineering Research
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    • v.59 no.1
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    • pp.118-126
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    • 2021
  • The experiments to produce the vaterite type calcium carbonate were conducted for using the waste oyster shell as the recycling resources. Firstly, the oyster shell were calcinated at 800 ℃ for 24 h. Calcinated oyster shell were reacted with the nitric acid solution, and were diluted to 0.1 M Ca(NO3)2 solution. This solution was mixed with 0.1 M Na2CO3 contained 0.1 mol lysine/1 mol CaO at 20 ℃ and 600 rpm mixing condition for 1 h. The reaction products were identified to vaterite type calcium carbonate (84.5% vaterite, 15.5% calcite) by XRD and SEM analysis. Mean particle diameter was 6.87 ㎛, and the lysine content in calcium carbonate was analyzed to 0.1%.

Shear Strength and Compressibility of Oyster Shell-Sand Mixtures for Sand Compaction Pile (SCP공법 적용을 위한 굴패각-모래 혼합토의 전단과 압축특성)

  • Yoon Gil-Lim;Yoon Yeo-Won;Chae Kwang-Seok;Kim Jae-Kwon
    • Journal of the Korean Geotechnical Society
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    • v.20 no.9
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    • pp.17-23
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    • 2004
  • Strength and deformation characteristics of oyster shell-sand mixtures were investigated to utilize waste oyster shell being treated as a waste material. Standard penetration test (SPT) is a common method to obtain in-situ strength in sand. However, in case of oyster shell-sand mixtures, there was no information between SPT N-value and internal friction angle of mixture soils. In this paper SPT experiments from several large scaled model chamber tests and large scaled direct shear tests were carried out with varying unit weight of oyster shell-sand mixtures. Appropriate correlations were in tile study observed among N-value, unit weight and internal friction angle, which make it possible to estimate in-situ strength from SPT and the coefficient of volume compressibility from the confined compression tests to compute the settlement of oyster shell-sand mixtures.

Development of Remediation and Stabilization Technique for Low-Permeable Contaminated Soil Using Waste Materials (폐기물을 활용한 저투수성 오염토양의 정화 및 안정화 기술 개발)

  • 박상규;이기호;박준범
    • Proceedings of the Korean Geotechical Society Conference
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    • 2002.10a
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    • pp.681-688
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    • 2002
  • Study was peformed to develop the‘environmental double pile’for the remediation of low-permeable contaminated soil. This technique is similar in function to‘sand drain pile’But this applies recyclable oyster shell treated as waste materials to a drain material and the pile is consisted of two layers. Inner metal pile is located in center and oyster shells are filled around it. By this technology, contaminated ground water is pumped out through the oyster shell and purified by drainage, adsorption, and reaction processes. Afterwards, the grout material is injected through the inner pile for the effect of the solidification / stabilization. As a result, the concept of this technique is a development of one-step process technology. Through the test, a consolidation characteristic by radial drain is going to be evaluated and the optimum standard of this technology will be calculated.

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