• KIEAE Journal
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• 제5권1호
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• pp.51-57
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• 2005

In this study, time-dependent concentration variations of VOCs from fixed furniture and Ondol floor widely used as finishing material of the floor were measured, and prediction equations were developed based on the measured results. VOCs were measured and analyzed based on EPA TO-17 and NIOSH 1500, 1501 method respectively, and GC/FID were used for the analysis of VOCs concentration. Measurements were carried out for 10 days after the installation of furniture and for 40 days after the installation of the floor in the residence constructed more than 10 years ago. In both case of floor and furniture installation, time-dependent concentration decay of VOCs can be properly converted into logarithmic scale. Especially in case of furniture, toluene showed the highest concentration and took longest time to decay. As a result of the prediction of VOCs concentration decay under different air change rate using estimated equations, concentration decay rate of indoor VOCs increased rapidly as the air change rate also increased.

• 한국실내디자인학회:학술대회논문집
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• 한국실내디자인학회 2006년도 춘계학술발표대회 논문집
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• pp.264-267
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• 2006

The purpose of this study is to examine the advertisements of eco-friendly interior products and finishing materials in 3 interior design magazines which have been published for 4 years since 2002: to identify specific types of the products and materials that consumers can choose and to analyze their special ingredients which have functions and effectiveness related to health. Literature review and content analysis on the advertisements were employed. The results are as follows: The amount of advertisements has been continuously increasing due to the public concerns on well-being and finishing material types absolutely took the greatest proportion (92.8%) among them. Floor coverings, wall papers, and paints are the big 3 materials in the finishing material advertisements. The frequently mentioned health-related ingredients in them were charcoal, natural jade, nanosilver, yellow soil and quartz porphyry, And their main functions were emission of negative ions and ultra infrared. However, it's not easy to find their scientific test results on health. Objective guidelines are needed for the right selection of interior products and materials to maintain healthy interior environment.

• 한국축산시설환경학회지
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• 제10권1호
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• pp.37-46
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• 2004

본 연구는 우사의 향방에 의한 사육장 바닥면의 조건이 육우의 생산성에 미치는 영향을 구명할 목적으로 체중 570kg 내외의 거세한우 16두를 남, 북향 톱밥 자리깃 사육장에 각 8두씩 임의배치하고, 16주일간 사양시험을 실시한 후 증체율, 사료효율 및 도축성적을 분석하였던 바 그 결과는 다음과 같다. 투광성이 양호한 남향 사육장의 바닥면은 시험기간 중 표면의 건조 상태가 좋았으나 햇볕의 효과가 적은 북향 사육장은 결빙기 이전까지 다습하고 불규칙한 표면 상태를 나타내다가 결빙기에는 표면이 심하게 돌출 된 상태로 결빙되어 비육우의 휴식과 거동에 지장을 주었다. 남향 사육장과 북향 사육장에 수용된 거세우의 두당 일 평균 사료섭취량은 각각 10.39kg 및 10.32kg으로서 유의차가 없었으나 일당증체량은 각각 0.75kg과 0.64kg으로 나타나 표면 상태가 불량한 북향사육장이 14.3% 적었으며(p<0.05), 사료요구율은 각각 13.91 및 16.12로서 15.9%가 증가하였다(p<0.05). 또한 증체당 TDN 섭취량(TDN/gain)은 각각 11.47 및 13.25로 나타나 사료이용효율은 15.5%가량 저하되었다. 한편, 남쪽과 북쪽 사육장에서 사육된 거세우간의 출하체중, 도체중량, 도체율, 육량등급 및 육질의 통계적 차이는 나타나지 않았다. 결론적으로, 사육장의 위치로 인하여 바닥표면의 상태가 불량한 조건의 깔짚 축적식 우사에서 비육말기 거세우를 사육할 경우, 활동에너지 소비량의 증가와 휴식 시 접촉면을 통한 전도열의 손실요인이 발생하여 증체율 및 사료효율이 크게 저하될 수 있다는 점이 본 연구를 통해 밝혀졌다. 이러한 결과는 육우사육에서 축사의 방향 및 지붕자재 선정의 중요성을 시사한다.

• Journal of the Korean Wood Science and Technology
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• 제45권3호
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• pp.343-359
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• 2017

건축물에서 사용되는 에너지를 줄이기 위하여 다양한 연구 및 정책이 진행되고 있으나 건축물에서 구조재 및 실내 외 마감재로 폭넓게 사용되는 목재의 열적 특성에 관한 연구는 미미한 실정이다. 이에 따라, 본 연구는 목질재료와 비 목질재료의 전열성능을 분석하기 위하여 목질재료가 주로 이용되는 주거용 건축물을 대상으로 열성능이 취약한(열교 발생) 부위를 선정하고, 각 부위별로 구조재와 마감재의 구성에 따라 총 16 Case에 대해 전열성능 분석을 실시하였다. 전열 해석 시뮬레이션 도구는 ISO 10211의 계산 방법을 따르는 Physibel Trisco를 이용하였다. 해석 부위의 모델링 역시 ISO 10211에서 제시된 기준에 의해 실시하였으며, 경계 온도 조건은 에너지절약설계기준에 따라 실내온도 $20^{\circ}C$, 실외온도 $-11.3^{\circ}C$(서울 기준)로 설정하였다. 구조는 콘크리트구조와 비 목질재료마감, 콘크리트구조와 목질재료마감 그리고 목구조에 목질재료마감의 경우에 따라 구분하였다. 부위는 벽체, 지붕, 층간바닥 및 최하층 바닥 등으로 구분하여 시뮬레이션을 진행하였다. 결과로서, 콘크리트구조의 경우 형상적 원인에 의해, 목구조의 경우 형상적인 원인에 재료적 원인이 더해져 다발적으로 열교가 발생함을 확인할 수 있었다. 추가적으로 콘크리트구조에서는 단열재의 불연속 부위에서 구조적인 열교가 발생하고 목구조에서는 구조적인 열교와 이질재료의 적용 부위에서 재료적 원인에 의한 열교가 발생하는 것을 확인할 수 있었다. 또한 콘크리트 구조에 목질 실내마감재를 적용하였을 경우에는 벽체의 선형 열관류율 값이 감소하는 것을 확인할 수 있었다.

• 한국소음진동공학회논문집
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• 제23권5호
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• pp.414-422
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• 2013

As structure-borne sound, the floor impact sound is one of the serious noises in residential building. Most of heating system applied to the typical Korean residential building is floor heating system which is called ondol. The ondol usually consists of finishing material, mortar with heating coil, light-weight aerated concrete and reinforced concrete. This study focused on the isolation of heavy-weight impact sound and modification of mortar and light-weight aerated concrete. Specifically the glass foam aggregate was added on light-weight aerated concrete. Also, water-cement ratio and amount of cement on mortar were revised. The sound pressure level of heavy-weight impact was measured in reverberation chamber using both bang-machine and impact ball. The size of specimen was 1 m by 1 m. Substitution ratio of glass foam aggregate on light-weight aerated concrete shows relationship with heavy-weight impact sound pressure level. In addition, heavy-weight impact sound pressure level was decreased with increment of water-cement ratio and amount of cement on mortar.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2023년도 가을학술발표대회논문집
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• pp.19-20
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• 2023

The pre-qualification system related to floor impact noise is considered ineffective, and thus, the introduction of a post-verification system is being prepared. This is because the performance, which was notarized in the qualification test due to various reasons, was not uniformly confirmed on building construction fields. Industry practitioners perceive that this is due to the influence of factors such as the flatness, levelness and/or thickness of the floor. However, it is very difficult to confirm such facts in a short period of time on the fields, and since the practical application of technology to measure and evaluate quantitatively and the establishment of a system are insufficient, it cannot be said to be a problem that can be brought to the surface. In fact, even when considering the conventional measurement of the dynamic modulus of elasticity, measurements are performed under controlled variables, such as placing a 200mm×200mm buffer material on a flat test-floor. However, in the fields, it is common to lay down larger productions(for example, 900mm×600mm) on the bare floor where significant variables are not controlled, and to construct finishing layers corresponding to the pre-qualified floor system without separately confirming the realization of the dynamic modulus of elasticity in the field conditions. In this study, spatial information of the bare floor on the field was measured and evaluated through a laser scanner. Technical methods for assessing the smoothness, flatness, and thickness of construction surfaces were reviewed, providing key insights for grading the quality of construction based on these criteria. Through further detailed and thorough investigations, it is expected that results suitable for practical application and systematization will be derived.

• 한국구조물진단유지관리공학회 논문집
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• 제17권3호
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• pp.82-88
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• 2013

본 연구에서는 원적외선의 방출을 증진시켜 쾌적한 실내 환경을 조성시키며 아울러 비중이 높은 재료를 사용하여 층간소음을 저감시키기 위한 방안으로서 건축용 친환경 바닥 마감재에 자철석 잔골재를 사용하는 모르터의 기초물성 연구를 수행하였다. 실험에 사용된 모르터의 배합은 자철석 잔골재를 자연사로 0, 20, 40, 60, 100% 치환하였다. 먼저 원적외선 방출성능으로서 방사율과 방사에너지를 측정하여 KICM의 기준을 훨씬 상회하는 결과를 얻었다. 단위용적질량 압축강도 실험결과 치환율이 증가함에 따라 선형적으로 증가하는 결과를 얻었다. 그러나 건조수축 시험결과 자철석 잔골재의 치환율이 증가함에 따라 건조수축 변화율이 기준 시험체 대비 급격하게 증가하는 것으로 나타나 향후 이를 해결하기 위한 방안이 강구되어야 함을 알 수 있었다.

• 한국건축시공학회지
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• 제8권5호
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• pp.93-99
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• 2008

The environment draws attention in the global community and a growing number of Koreans have interest in improving the quality of life, the importance of house environment has attracted the attention of the public. Against this backdrop, constructors have unveiled environmentally -friendly projects. However, they failed to establish people-oriented environment by being occupied with maximizing profitability through the improvement of brand image and caused sick house syndrome that has recently made controversy. In this regard, the study analyzed the mechanism of discharge of TVOC, one of the sick house syndrome-causing materials, that affects IAQ and its characteristics and examined the effect that granodiorite has on reduction of the discharge of TVOC in order to minimize damage. Experimental sample consisted of interior finishing materials frequently used in ceiling, wall and floor and adhesives used at a time of construction, and the TVOC of building materials was measured through the use of septum bottle unlike In the existing chamber method. Measures to counter the sick house syndrome were suggested by reducing the possible damage from the stage of selection of building material and by figuring out the effect that the granodiorite has on reduction of the discharge of TVOC.

• 한국실내디자인학회:학술대회논문집
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• 한국실내디자인학회 2003년도 춘계학술발표대회 논문집
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• pp.187-191
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• 2003

Modern interior design is expanding diversely, with the rapid development of technology and change of era. The basic of interior space that is rapidly changing consists of floor, wall and ceiling, and these are formed by materials, materials for structure or finishing materials. In the modern interior space, materials are utilized to present an atmosphere that meets the trend of the dissolution of post-modernism and the trend of minimalism. Accordingly, in this study, designers who take serious view on the relation of space and material, and the relation focusing on completed works, in modern interior design were investigated. The interrelation of the representation of each material, organic space, minimal space, and the space of Oriental fusion style were investigated through the works of modern interior designers, such as Karim Rashid and Ettore Sottsass.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2010년도 춘계학술대회 논문집
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• pp.527-528
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• 2010

Previous experimental results performed by many researchers for a couple of decades in South Korea have shown that an absorbing sheet inserted in a conventional floating slab system for thermal insulation or vibration absorption may amplify the vibration of the slab system at specific frequency ranges depending on the material properties of the sheet. The amplified vibration, consequently, results in the heavy weight floor impact noise exceeding the sound level limit for an apartment house, 50dB. In this study, the amplification mechanism is examined through numerical analysis and a new slab system is proposed to reduce the amplification and control the noise. The new slab system consists of studs connecting the base slab and upper concrete finishing yielding the dramatically increased stiffness of the slab. The numerical simulation is performed to investigate the effect of the slab system with studs on the vibration and noise control. The results show that the performance of the slab is sensitive to the number and location of studs, and the heavy weight floor impact noise can be reduced up to 6-7dB compared to the conventional slab system at the optimal stud location.