• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1999년도 봄 학술발표회 논문집(I)
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• pp.70-75
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• 1999

The purpose of this study is to recycle the waste concrete which is generated in large quantities as crushed stone in construction works. This study deals with the comparative analysis on the construction works and engineering properties of recycled aggregate concrete through physical experiment. The experimental variables are the kinds of aggregates, some different aggregate composition, and W/C ratio(0.40, 0.45, 0.50). It is able to find from the experimental results that the recycled aggregate concrete is good as general concrete on the construction works and engineering propperties. In addition to, the reliable regression analysis equations between compressive strength and various experimental data for recycled aggregate concrete are presented.

• 한국농촌건축학회논문집
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• 제7권1호
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• pp.112-120
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• 2005

The object of this study is one of the traditional houses about Siheyuan(courtyard house) which is one of the most remarkable types of dwelling in China. The purpose of this paper is to examine and analyse the formation process of the Siheyuan. Its organizational formation process are based on historical and natural-geographical background. With the passage of time this house developed into one of the Chinese house style. The technique of Siheyuan's spatial composition goes so far back in the New Stone Age. The relics of this are the colony layout, the system of four sides, the layout type of a palace, the picture of lacquered ware, the picture of brick, the earthenware of house type, the painting of cave, the paintings of painters and others.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2001년도 춘계학술대회 논문집(한국공작기계학회)
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• pp.101-106
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• 2001

In order to establish the optimum process parameters and diamond saw blade composition for machining natural stone, the chip formation process and the wear process must be understood. Diamond saw blade is one of the most effective, versatile, and extensively used methods of processing rock and other hard materials, such as granite, marble, concrete and asphalt. For many years, it has been known that chip thickness is one of the most significant in the understanding of the sawing process, and other variables such as force and power have been correlated with it. In this study, mathematical relations of a material chipped by a single grit of the saw blade will be undertaken. The material chipping geometries have been mathematically defined and derived as maximum chip thickness.

• 한국세라믹학회지
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• 제47권4호
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• pp.296-301
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• 2010

The objective of the present research is to develop the body for Temmoku Teabowl, in order to manufacture the Temmoku Teabowl with the characteristics of Jian Ware, which has a rich dark brown color and has been extolled as the representative fine article of Temmoku Teabowl. Basic composition was first determined using domestically produced clay, kaolin and pottery stone as starting materials. After the addition of calcinated Hwangto, which is rich in iron, the mixture was subjected either to oxidizing calcination at $1260^{\circ}C$ to produce a body with a color suitable for Hanam ware or to reducing calcination at $1230^{\circ}C$ to produce a body with a color suitable for Jian Ware. The bodies produced in this research showed the strength value of $380{\sim}36\;Kg/cm^2$, the specific gravity of 2.304~2.310, the absorption ratio of 4.103~3.897, and the porosity of 8.608~8.207%.

• 에너지공학
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• 제27권1호
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• pp.59-64
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• 2018

In this paper, we investigated the alternative sources of limestone. Oyster shell waste originated from aquaculture that causes a major disposal landfill problem in coastal sectors in southeast Korea. Their inadequate disposal causes a significant environmental problems araised. Bio mineralization leads to the formation of oyster shells and consists $CaCO_3$ as a major phase with a small amount of organic matter. It is a good alternative material source instead of natural lime stone. The utilization of oyster shell waste for industrial applications instead of natural limestone is major advantage for conservation of natural limestone. The present work describes the limestone and oyster shells hydraulic activity and chemical composition and characteristics are most similar for utilization of oyster shell waste instead of natural limestone.

• 한국건축시공학회지
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• 제13권1호
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• pp.1-9
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• 2013

There has recently been a great deal of research into the appropriate building materials for eco-friendly construction. In the field of earth architecture, there have been walls made of pure earth or with rammed earth including a small amount of cement. The purpose of the study is to investigate the possibility increasing compressive strength through a more eco-friendly composition by using Hwangtoh binder rather than cement to increase the strength performance of rammed earth. It was found that the more the ratio of binder was increased, the more the strength was increased, but enhancement did not increase noticeably in the lower part that did not compact completely, and proper height to pour earth is 200 mm. When stone dust was added, compressive strength was lower than when adding fine aggregate and coarse aggregate, but a finer surface texture was provided.

• 헤리티지:역사와 과학
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• 제43권1호
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• pp.160-189
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• 2010

본 연구는 아직까지 학계에 보고되지 않은 논산 노성산성 일대 입석과 총석의 현황과 그 형태 및 의미를 파악하기 위한 목적으로 시도되었다. 이에 따라 노성산과 노성산성의 장소정체성과 노성산성 내외부에 산재한 입석의 분포를 파악하는 한편 입석의 밀도가 가장 높고 문화재적 보존가치가 높다고 판단되는 '총석사'를 중심으로 수석(樹石)의 배치형태 및 구성 특성을 조사 분석하였다. '신증동국여지승람' 불우조(佛宇條)에서의 '탑사(塔寺)' 존재의 언급, 탐문조사 결과 사찰의 존재설 그리고 '관음사(觀音寺)' 명의 와편 발굴 기록 등으로 미루어 볼 때 오래전부터 산성 내부에 불전이 있었던 것으로 추정되며 이는 '총석사'라는 각자와 관련되었을 것으로 추정된다. 관찰조사 결과, 산성내부에 존재하는 다수의 입석지 중 제6입석지는 수석(樹石)의 규모, 수석 구성의 복합적 경향, 주변 우물(샘) 및 방지 그리고 석문 등에 이르는 계단의 조성 흔적 등을 볼 때 총석사를 중심으로 인위적으로 조성된 공간의 성격이 강하다. 총석사를 비롯하여 삼신암, 칠성암, 대장암 등으로 각자된 5개의 수석과 관세음보살로 추정되는 선각 마애불은 동일 공간 바위 위에서 발견된 북두칠성의 성혈(星穴)과 함께 이 공간이 불교 또는 도교와 민간신앙이 결합하여 발생한 칠성신앙 및 산신신앙적 공간이었음을 유추할 수 있는 단서로 파악되었다. 총석사 입석의 실측조사 결과, 수석의 수는 총 24개로 수석고는 29~402cm, 수석폭은 48~290cm로 규모에 있어 큰 편차를 보였으며 수석간 평균거리는 23.56cm로 나타났다. 또한 입석, 평석, 산형석 그리고 영상석 등 다양한 돌을 특치(特置), 군치(群置)하여 수석하였으나 돌의 좌향은 서향(W)으로의 일관된 지향성을 보이고 있었다. 또한 국내에 알려진 정토정원의 유구와 비교할 때 수석의 배치 기법상 입석과 형상석 이외의 3개의 평석은 선원의 대표적 구성요소가 되는 좌선암의 형태를 띠고 있는 것으로 보인다. 이 중 보살암을 마주하는 평석은 삼산석(三山石)을 상징화하여 조성된 것이지만 높이 및 주변 수석 배치 여건으로 보아 참선의 목적보다는 제수를 위한 공양석으로 추정된다. 총석사 수석의 구성은 입면이나 평면구성상 천지인 삼재(三才)를 형상화한 삼존석형(三尊石形)을 바탕으로 심경미(深景美)를 추구하고자 한 것으로 보인다. 또한 부등변삼각형의 3:5:7 복합수석법으로 일정한 지향성을 보이며 배치되고 있음을 볼 때 총석사 입석군은 사원수석의 형태로 참선을 목적으로 돌짜임된 축경적(縮景的) 정원 유구로 보인다.

• 한국식품영양학회지
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• 제25권3호
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• pp.513-520
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• 2012

This research was planned and executed to evaluate how the composition of Yack-sun tea can affect the health conditions of people who are suffering from diet-related such as being overweight, are obese and have hyperlipidemia, by taking Yack-sun tea in a form of a nutritional supplement with our daily meals. We produced Kangjieum with Lycium chinense Mill., Polygonum multflorum Thunb, Cassia tora L., Crataegus pinnatifida Bge and Salvia miltiorrhiza Bge. Thus, we approach of oriental diet therapy area research of Kangjieum and analysis proximate composition, water soluble antioxidant content. The content(%, dry basis) of total carbohydrate was 60.23%, crude protein was 18.18%, crude ash was 11.36% and crude fat was 10.23% in Kangjieum. Total water soluble antioxidant content was 1.027 ${\mu}g/m{\ell}$ of Kangjieum. We think that scientific and objective evaluation was done on the components of the Kangjieum prescription. This basic data could help guide the application of oriental medicinal resources into other foods and serve as a stepping-stone for use of Kangjieum in the burgeoning field of nutraceutical foods. Last, the scientific effects of oriental medicinal foods developed according to oriental medicinal theory. This theory is believed to be essential for government policy development concerning validation of medicinal effects and assessment, with the aim of fostering systematic development and providing guidance to food development in the interest of national health.

• Conservation and Restoration of Cultural Heritage
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• 제1권1호
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• pp.39-48
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• 2012

The first twenty-five years of scientific study within Korea on Korean traditional ceramics has been characterized as a bridging effort to understand the rich field of artistic ceramic masterpieces on one hand with analytic results gained from mounds of broken shards and kiln wastes on the other. First shard pieces were collected directly from the waste mounds, but most of the analyzed shards were provided by art historians and museum staffs directly involved in systematic excavations. The scientific study is viewed as one of many complimentary ways in learning about the multi-faceted ceramics culture, ultimately connecting human spirits and endeavors from the past to the present to the future. About 1350 pieces of analyzed shards have been so far collected and organized according to the production location and time period. From the experimental results of the analysis, the compositional and microstructural characteristics of bodies and glazes have been deduced for many kiln sites of Goryeo and Joseon dynasties. Except for a few local kilns, porcelain stone was used as body material in both dynasties. The principle of mixing a clay component with a flux material was used in Korean glazes as was in China. The clay component different from body clay was often used early on. In Gangjin a porcelain material appropriate for whiteware body was mixed for celadon glaze, and in Joseon Gwangju kilns glaze stone was chief clay material. The use of wood ash persisted in Korea even in making buncheong glazes, but in Joseon whitewares burnt lime and eventually crushed lime were used as flux material.

• 암석학회지
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• 제24권3호
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• pp.181-191
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• 2015

경복궁 근정전 박석은 눈부심과 미끄럼 방지 및 배수 등을 고려한 판상의 바닥 포장석재다. 이 영역의 박석은 이방성을 갖는 중립질 흑운모화강암으로 조성되었으며, 미약한 미르메카이트 조직을 보이는 것이 특징이다. 고문헌을 토대로 박석의 채석지점을 탐색하여 양자의 동질성을 분석하였으며, 박석의 운송과정을 해석하였다. 이 결과, 박석과 석모도 낙가산 일대의 화강암은 암상, 구성광물, 조직 및 지구화학적 특징이 거의 동일하였다. 박석에 대한 석역은 치석 및 운송 용이성, 물자 및 인력의 부담을 최소화하기 위해 석모도의 화강암 박리돔이라는 물리적 풍화특성을 활용하여 판상의 석재를 조달한 것으로 해석된다.