• Title/Summary/Keyword: Old concrete

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Water Absorbtion Controlling Type Surface Treatment Method for Quality Enhancement of Recycled Aggregate (순환골재 품질개선을 위한 수분흡수제어형 표면처리방법)

  • Choi, Heebok
    • Journal of the Korea Institute of Building Construction
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    • v.15 no.6
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    • pp.561-567
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    • 2015
  • The research, in order to enhance the quality of recycled aggregate, was carried out the quality characteristics test of the recycled aggregates by applying the four kinds of surface treatment using a colloidal suspension of approximately 5nm~60nm particle size with the alkalinity of pH 10.2. The quality tests of recycled aggregate have been processed by specific gravity, water absorption, porosity, surface properties, and the compression and tensile tests. The colloidal suspension was coated effectively the surface of the old cement mortars of recycled aggregate with a constant thickness by colloidal suspension is being applied to the recycled aggregate surface under constant pressure of 100kpa and then it was dried in at $60^{\circ}C$. The surface treatment method by the Method C out of 4 kinds of surface treatment improved effectively the quality of the recycled aggregates, whereby it obtained the best compressive strength and tensile strength of the recycled aggregate concrete.

A Study on Bee Sting Therapy: Based on'Research on Bee Sting Therapy' of Monthly Yangbonggye (봉침요법(蜂針療法)에 대(對)한 고찰(考察) -월간(月刊) $\ll$양봉계(養蜂界)$\gg$의 '봉침요법(蜂針療法)에 대(對)한 연구(硏究)'를 중심(中心)으로-)

  • Kang, Jung-Won;Park, Dong-Suk;Lee, Sang-Hoon;Lee, Jae-Dong
    • Journal of Acupuncture Research
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    • v.26 no.1
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    • pp.135-151
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    • 2009
  • Objectives : To survey concept, meaning, and problems of beekeeper's bee sting therapy by reviewing and summarizing outline, indications, and clinical cases of 'Research on Bee Sting Therapy' described in Monthly Yangbonggye. Methods : As a narrative review, literature researches were carried out based on 'Research on Bee Sting Therapy' in Monthly Yangbonggye in the aspects of outline, indications, and clinical cases. In the concrete, outline was just summarized and described, and indications were categorized by recent version of international statistical classification of diseases and related health problems(ICD) of WHO(World health organization), and clinical cases were collected and summarized from the viewpoint of acupoints and methods of therapy. Results : 1. Bee sting therapy is to inject venom into skin by stimulating affected lesions or acupoints on meridian with sting of bee alive for therapeutic purposes. It can be divided into two classes(direct stimulation(直針法) and indirect stimulation(拔針法)) by the differences of methods, and is different from bee venom acupuncture therapy in the aspects of the way of extraction and injection. 2. In this material, bee sting therapy has 83 indications classified into 17 of 22 chapters of ICD. Among clinical cases, cases on neoplasm, goitre, lump, and haemorrhoids by direct stimulation were especially outstanding. 3. The therapeutic acupoints selected in bee sting therapy are mainly Ashi points(阿是穴), and partly acupoints on meridian(經穴), Extra points(經外奇穴), and New points(新穴) with careful consideration of patients' condition. Conclusions : Although bee sting therapy has more or less controversial points of diagnosis, treatment, and management of side effects, it is thought that the accumulated and inherited experiences from old times can be used as meaningful material by further experimental and clinical researches.

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Mock-Up Test for Connection of New-Old Concrete of Footing (확대기초의 신구 콘크리트 접합 모형실험)

  • Hwang, Chul-Sung;Yoo, Sung-Won
    • Journal of the Korean Recycled Construction Resources Institute
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    • v.6 no.1
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    • pp.66-71
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    • 2018
  • In general, when an existing pier is enlarged and reinforced using a small diameter pile, bonded anchor with deformed reinforcing bars is used to maintain the integrity of the joint. However, in the case of bonded anchors, the performance depends largely on the type of joint material. Nevertheless, unlike mechanical anchors, there is no standard method for designing appropriate design methods and proper performance evaluation. Therefore, in this study, the performance of the anchoring anchor was evaluated by performing a model experiment using the reinforcing bars and anchor reinforcing bars. Experimental results show that the structural performance of the unbonded specimen is the best, and the failure mode is the punching shear failure. The deflection of the end of the member is smaller than that of the unconnected member, The deflection of the connected member is larger than the deflection of the small connected member. As the load increases, the possibility of slippage of the anchor steel or fold connection rebar is high.

Design Development for Fashion Cultural Product Using Traditional Patterns by Tessellation

  • Park, Youshin
    • Journal of Fashion Business
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    • v.20 no.6
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    • pp.79-93
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    • 2016
  • Since the development of patterns using tessellation is applied to a wide range of fields such as clothing, architecture, environment, and products, etc. and its expression principle is also found in various fields such as mathematics and science, etc. However, this pattern is mostly used as a math material with little studies on fashion and culture. In addition, it is thought that Korean traditional culture products need more various and modern design development methods and pattern through preliminary investigation which is simple copy of traditional items, simple copy of Korean Alphabet, Chinese character, and folk paintings. Therefore, it will present the method to make more design cases using Tessellation. Tessellation that combines mathematics and art will be the infinite form of designing of designers as well as creative training way to understand the composition principles of old culture and to raise sense of modern design. Tessellation of regular triangle, regular square, and regular hexagon was performed on the patterns which have meaning of wealth and prosperity of Korean traditional patterns. As the concrete method, first, each side of the regular triangle is developed symmetrically with patterns of fish, turtle, and cicadas. Second, rotational movement after symmetry movement about middle point of one side ${\times}$ 1 symmetry movement about middle point ${\times}$ 1 using crane and cloud, of the regular triangle was performed. Third, the regular square was tessellated parallel movement ${\times}$ 2 with "Da(multi)" and dragon pattern as the source image. Fourth, the sitting tiger was tessellated with symmetry movement about middle point ${\times}$ 2 and parallel movement ${\times}$ 1. Fifth, three bat patterns are tessellated by again rotational movement of two sides after rotational movement of one side and rotational movement of the other side. In addition, It developed traditional culture product design of the scarf, umbrella, aprons, neckties.

A Study on the Traditional Culture and Tea Culture, for Reunification and Human Nature Education (청소년의 통일·인성교육을 위한 전통문화와 차문화(茶文化) 적용의 탐색)

  • Kwag, Mi-Sook;Ju, Young-Ae
    • The Journal of the Korea Contents Association
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    • v.17 no.6
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    • pp.272-286
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    • 2017
  • The division of the South and North of 70 years has occurred in the old generation, but the reunification is now handled by the youth generation. Therefore, it is necessary to train basic human nature as well as learning and research of rational political and economic theory in order for young adolescents as leaders in the unification era to carry out their own duties faithfully and responsibly. In this paper, I rediscover the value of traditional culture in the human nature education that aims for reunification, social and cultural integration, and propose tea culture as contents that can be applied to reunification and the human nature education of youth as reunification culture contents as a concrete program of traditional culture do.

Study of single dose toxic test of Sweet Bee Venom in Beagle Dogs (Sweet Bee Venom의 비글견을 이용한 단회근육시술 독성시험)

  • Yoon, Hye-Chul;Lee, Kwang-Ho;Kwon, Ki-Rok
    • Journal of Pharmacopuncture
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    • v.13 no.4
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    • pp.43-61
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    • 2010
  • Objectives : This study was performed to analyse single dose toxicity of Sweet Bee Venom(Sweet BV) extracted from the bee venom in Beagle dogs. Methods : All experiments were conducted under the regulations of Good Laboratory Practice (GLP) at Biotoxtech Company, a non-clinical study authorized institution. Male and female Beagle dogs of 5-6 months old were chosen for the pilot study of single dose toxicity of Sweet BV which was administered at the level of 9.0 mg/kg body weight which is 1300 times higher than the clinical application dosage as the high dosage, followed by 3.0 and 1.0 mg/kg as midium and low dosage, respectively. Equal amount of excipient(normal saline) to the Sweet BV experiment groups was administered as the control group. Results : 1. No mortality was witnessed in all of the experiment groups. 2. Hyperemia and movement disorder were observed around the area of administration in all the experiment groups, and higher occurrence in the higher dosage treatment. 3. For weight measurement, Neither male nor female groups showed significant changes. 4. To verify abnormalities of organs and tissues, thigh muscle which treated with Sweet BV, brain, liver, lung, kidney, and spinal cords were removed and histologocal observation using H-E staining was conducted. In the histologocal observation of thigh muscle, cell infiltration, inflammation, degeneration, necrosis of muscle fiber, and fibrosis were found in both thigh tissue. And the changes depend on the dose of Sweet BV. But the other organs did not showed in any abnormality. 5. The maximum dose of Sweet BV in Beagle dogs were over 9 mg/kg in this study. Conclusions : The above findings of this study suggest that Sweet BV is a relatively safe treatment medium. Further studies on the toxicity of Sweet BV should be conducted to yield more concrete evidences.

The Satisfaction with the Showrooms of the Total Interior Brands applied on Experience Design - Focused on the Showrooms Managed by Domestic Building Material Companies - (경험디자인이 적용된 토탈 인테리어 브랜드의 쇼룸 만족도 - 국내 건자재 기업들이 운영하는 쇼룸을 중심으로 -)

  • Lee, Sang-Mi;Han, Hae-Ryon
    • Korean Institute of Interior Design Journal
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    • v.26 no.5
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    • pp.25-33
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    • 2017
  • The home interior market has been expanding due to the continuing increase of single-person households, the craze for DIY interior design, the increasing demands for old-house renovation and the customer needs for good housing conditions. Now the building materials companies are scrambling for the whole interior market share. The heretofore companies have focused only on the single items, but now they are promoting the comprehensive interior products as total interior brands. Besides, they use their own showrooms to share their brand culture experience and have communication with their customers. As for the show rooms, they have got to represent the identities of the building materials brands. And to present them effectively, it needs to meet the customer needs and emotions. In this connection, the object of this study is to clarify the definitions and the characteristics of the show rooms and the experience design through the literature research, analysis the space characteristics of the experience design in the show rooms of total interior brands, investigate their customer satisfaction and present the direction and the effective methods of the space design for the show rooms of the future. And the study result shows the experience design is the key factor to the high user satisfaction. Thus, the show rooms should provide the well-balanced experience with the adoption of a variety of experience design elements. Especially, the experience design elements are needed in the room to display the merchandise. Lastly, the show rooms are expected to increase constantly, so the study targeted at the specific area, Seoul should be expanded to other areas. And this study based on the customer survey alone have a limit to giving the concrete proposals. Therefore, the follow-up studies with the different methods such as one-to-one interview will be in demand.

Effects of Sweet Bee Venom on cardiovascular system in the conscious telemetered Beagle Dogs (Sweet BV가 비글견의 심혈관계에 미치는 영향)

  • Lim, Chung-San;Lee, Kwang-Ho;Kwon, Ki-Rok
    • Journal of Pharmacopuncture
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    • v.13 no.3
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    • pp.15-46
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    • 2010
  • Objectives: This study was performed to analyse the effects of Sweet Bee Venom(Sweet BV) on cardiovascular system in the conscious telemetered Beagle Dogs. Methods: All experiments were conducted at Biotoxtech Company, a non-clinical studies authorized institution, under the regulations of Good Laboratory Practice (GLP). Male Beagle dogs of 13-19 months old were chosen for the pilot study and surgical implantation was performed for conscious telemetered Beagle dogs. And after confirming condition of Beagle dogs was stable, Sweet BV was administered 4 times(first: 0.0 mg/kg, 2nd: 0.01 mg/kg, 3rd: 0.1 mg/kg, and forth: 0.5 mg/kg, one time/week) in thigh muscle of Beagle dogs. And blood pressure, heart rate, electrocardiography and clinical responses were measured. Equal amount of normal saline to the Sweet BV experiment groups was administered to the control group. Results: 1. In the analysis of body weight and taking amount, Beagle dogs did not show significant changes. 2. In the clinical observation, responses of pain and edema were showed depend on dosage of Sweet BV. 3. In the analysis of blood pressure, treatment with Sweet BV did not show significant changes in the dosage of 0.01 mg/kg, but in the dosage of 0.1 mg/kg and 0.5 mg/kg, treatment with Sweet BV increased blood pressure significantly. 4. In the analysis of heart rate, treatment of Sweet BV did not show significant changes in all dosage and period. 5. In the analysis of electrocardiography, treatment of Sweet BV was not showed significant changes in all dosage and period. Conclusion: Above findings suggest that Sweet BV is relatively safe treatment in the cardiovascular system. But in the using of over dosage, Sweet BV may the cause of increasing blood pressure. Further studies on the subject should be conducted to yield more concrete evidences.

Study of single dose test of Sweet Bee Venom in rats (Sweet BV의 rat를 이용한 단회 근육시술 독성시험)

  • Kim, Young-Jin;Lim, Chung-San;Kwon, Ki-Rok
    • Journal of Pharmacopuncture
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    • v.12 no.4
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    • pp.5-32
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    • 2009
  • Objectives: This study was performed to analyse single dose toxicity of pure melittin(Sweet Bee Venom-Sweet BV) extracted from the bee venom by utilizing protein isolation method of gel filtration. Methods: All experiments were conducted at Biotoxtech, a non-clinical studies authorized institution, under the regulations of Good Laboratory Practice (GLP). Six weeks old female Sprague-Dawley rats were chosen for the pilot study and determined 30㎎/㎏ which is 4285 times higher than the clinical application dosage as the high dosage, followed by 15 and 7.5㎎/㎏ as mid and lose dosage, respectively. Equal amount of excipient to the Sweet BV experiment groups was administered as the control group. Results: 1. No mortality was witnessed in all of the experiment groups. 2. Hyperemia and movement disorder were observed around the area of administration in all groups, and higher occurrence in the higher dosage groups. Hyperemia and movement disorder diminished with elapsed time. 3. For the weight measurement, male groups showed larger reduction in weight in accordance with higher dosage. Female groups didn't s how significant changes. 4. To verify abnormalities of organs and tissues, cerebellum, cerebrum, liver, lung, kidney, and spinal nerves were removed and conducted histological observation with H-E staining. No abnormalities were detected in any of organs and tissues. 5. One female rat in the 30㎎/㎏ group had amputated toe near the administered area and histopathological finding was hemorrhage with inflammation. This is presumed as a secondary infection after the administration of Sweet BV. Conclusion: Above findings suggest Sweet BV is relatively s safe treatment medium. Further studies on the subject should be conducted to yield more concrete evidences.

A Study of Applied Digital Media in Street Environmental Design (가로환경디자인에 있어서 디지털미디어의 활용에 관한 연구)

  • Lee, Hyuk-Soo;Hong, Kwan-Seon
    • Archives of design research
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    • v.18 no.1 s.59
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    • pp.115-124
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    • 2005
  • Fast developing digital technology is Having an enormous societal influence, creating a porous new world without boundaries. This phenomenon applies to a whole range of fields, including culture, politics and even our daily lives. Urban Street cannot be excluded from this world-transforming change. Digital technology is changing the physical structure, growing patterns, function and role of the Urban Street. As a result, Urban Street should now be freeing themselves from the old-world functionalism, which has been pursued uniformly under the names of rationality and efficiency. We have, then, to think about the culture of the Digital Urban Street,'that is, the digital life style, which is tangibly generated in the concrete city space, and which must be prepared for further digitalization. This paper argues that the street must be understood as a communications centre, because digital technology has created a new communications style. Also, this paper focuses on how the physical environment of Urban Street will evolve with regard to both function and appearance. In conclusion, studying the ubiquitous space, it also looks at how existing urban planning and space design should lead to the further development of Urban Street using digital technology, as well as to the role this technology will have in the future.

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