PURPOSES: The objective of this study is to determine the milling temperature that minimizes the binder-induced damage to the aggregate; this is achieved by evaluating the temperature dependence of the viscosity of the asphalt binder, with the aim of developing an effective heating process for warm in-place recycling. METHODS : The validity of the indoor test was confirmed by conducting an internal heating test based on the on-site heating test. In addition, the adhesive power of the binder was measured at various temperatures (30℃, 40℃, 50℃, 60℃, 70℃) via three types of measuring methods. RESULTS: The surface temperature spectrum of field test was slight different with that of laboratory test. But, the spectra of inner temperature between the field and the laboratory was almost similar. Also, the adhesion of the asphalt binder was measured from 30℃ to 70℃. The adhesion of the binder was significantly decreased from 60℃. Contrary to other temperature, the adhesion was slightly changed from 60℃ to 70℃. Also the inner temperature between two different heating methods was shown similar temperature spectra. CONCLUSIONS: The pavement heating temperature spectrum of hot in place recycling method was simulated by a laboratory test. Based on this study, the optimum temperature was 60℃~70℃ for reducing aggregate damage during milling process. The susceptibility heating method developed in this study can be maintained the optimum inner temperature range.

As the development environment is changing with the development of information communication technology, the systems that were used by each service became used with integration. In the process of integrating from existing legacy systems to new system, it should be smoothly integrated or shared, however, it cannot help holding existing technology or component due to significant cost burden for conversion. In this paper, it was not only classified by types with analyzing the various elements that make up legacy system but an approach and monitoring system were developed to each type. After System application results, data's information generated in each process is provided to other system in real time, so that it has not only secured the work efficiency and reliability but also it is made possible by integrating data in various formats for efficient data management, rapid search and tracking to history. With real-time monitoring system developed in this study, It can be very useful in a variety of industries which require real-time monitoring of distributed legacy system data.

Bond stress between cast-in-place ductile fiber reinforced cementitious composites and CFRP plank were experimentally analyzed. As failure shape, the mixture of failure between CFRP plank and epoxy, and failure between concrete and epoxy was shown. In case of RFCON from the suggested simple bond slip relationship, the maximum average bond stress was 5.39MPa, the initial slope was 104.09MPa/mm, and the total slip length was 0.19mm. PPCON showed the maximum average bond stress of 4.31MPa, the initial slope of 126.67MPa/mm, and the total slip length of 0.26mm, while RFCON+ appeared to have 8.71MPa, 137.69MPa/mm, 0.16mm. PPCON+ had 6.19MPa maximum average bond stress, 121.56MPa/mm initial slope, and 0.34mm total slip length. To comprehend the behavior of composite structure of FRP and concrete, local bond slip relation is necessary, and thus a simple relation is suggested to be easily applied on hybrid composite system

The principal hygienic problem caused by livestock industry is the odor exposed to farm workers. This study was performed to assess air cleaner efficiency for reducing odor through on-site evaluation. The concentration of ammonia and hydrogen sulfide, which are major odorous compounds generated from livestock building, were monitored by realtime direct recorder. The odor mixture was measured by air dilution method applying human noses of five panels. Their reduction efficiencies were represented by difference between initial concentration exhausted by non-treatment and concentration measured after treatment of respective control mechanism (water, germicide and plasma ion) of air cleaner. Mean levels of ammonia and hydrogen sulfide were 1.84 (SD:0.22) ppm and 76.83 (SD:1.37) ppb for non-treatment, 1.23 (SD:0.09) ppm and 59.07 (SD:2.68) ppb for wet scrubber (water), 1.08 (SD:0.03) ppm and 58.55 (SD:1.62) ppb for wet scrubber (germicide), and 0.96 (SD:0.03) ppm and 53.66 (SD:1.37) ppb for plasma ion, respectively. Mean dilution factors of odor mixture were 100 for non-treatment, 66.9 for wet scrubber (water), 144.2 for wet scrubber (germicide), and 66.94 for plasma ion, respectively. Based on the results obtained from on-site evaluation, ammonia and hydrogen sulfide showed the mean reduction efficiency of 40% and 25.7% compared with non-treatment process of air cleaner, respectively. In the case of odor mixture, the highest dilution factor was observed at wet scrubber (germicide) compared with other control mechanism of air cleaner.

Recent News patrons of incidents can be called sinkhole that occurred one after another (Sink Hole). Due to this anytime, anywhere I do not know how the land is turned off worry and anxiety is the reason why you can never be dismissed as exaggerated. As we have seen today through the video, the vehicle was traveling on a road or pedestrian who was walking down the street they look out of the basement of a sudden they still come to mind vividly. Here, examples and corresponding measures to prevent the sinkhole off the ground, including the causes and impact on society because of this that occurred, and policy measures and abroad are evaluated with respect to what it is.

This study analyzed the safety management efficiency through input-oriented BCC Model using DEA by making of Models, in which this study selected the number of staff affiliated with the construction site, number of staff members on the construction team, and number of safety personnel as Input Factor, along with the number of disaster victims and zero-accident accomplished hours as output elements, targeting 40-or-so apartment building construction sites which are being built by 3 domestic construction companies. As a result of efficiency, it was 0.643, the number of efficient DMU was 4. In the aspect of returns to scale, 21 construction sites(52.5%) found to be in a state of increasing returns while 14 construction sites(35%) was in a state of Decreasing returns. The reason for inefficiency was found to lie in technical factors in case of 30 construction sites(75%). Lastly, inefficient DMU is in need of 38.9 % and 66% reduction in site personnel and safety personnel. Based on study results, the 29 construction sites accounting for 72.5% of DMU for safety management efficiency evaluation object turned out to do inefficient safety management that doesn't fit the size of each company.

Recently, the domestic air construction site is shortened rapidly, Ltd. is inevitable for reasons such as reduced air according to client's demands have been made. Accidents that occur during rapid construction is a situation that occurs accordingly indispensable. In the rapid construction and a study about the impact on safety and prevention measures and to contribute to accident prevention.

Recently, the Ministry of Employment and Labor Management is a trend to strengthen all men death rate than the accident rate. Points reduction in the accident rate change orders related to credit rating score to +2 points in his plans as part of +1 point. In addition, according to the fancy linger RISK treatment in the event of a disaster site and fiction treatment to achieve accident-free during processing the scene interspersed with equity issues have been raised. In general disaster for the problem in the first two cases occurs when abnormal process according to the disaster site manager positions dismissal policy, each division headquarters itself, interspersed disasters performance compared to processing in accordance with the refrain, processing expenses in accordance with the composition of untreated industrial accident, costs and burdens partners FTC , there is a possibility that the issues raised, such as the Ministry of Employment and Labor. In response to domestic social practices focused on the construction site practices and prevention measures should be evaluated with respect to what.

Total accident rate in the construction industry is a very meaningful reduction to establish a comprehensive disaster reduction measures, including through the Survey, the disaster prevention projects whilst driving status and problem analysis in order to reduce the mature workers in the construction industry is growing rapidly in all disaster disasters (share) The days. It is urgent to establish a framework and measures that can identify the specific cause for this than for the middle-aged workers and disaster reduction in disaster reduction efforts, which continue to increase. Used as measures of information and data presented in the basic requirements of mature workers also been.

Recent construction site large disaster occurs in, even normal disaster not be reduced, the efforts of pre-disaster prevention for this is also a need to study the evaluation index. By comprehensive examination zero reform the current lowest bid system has included the social responsibility index is scheduled, objective and quantitative evaluation indicators making construction safety areas that are included in the item of social responsibility is required ing. In this study, the construction, in order to prevent disasters, efforts pre disaster prevention be presented metrics in the construction safety in the field of comprehensive examination system and the evaluation index, it is intended to examine the evaluation items for the evaluation indices .

Job-appropriate personal protective equipment(PPE) is important for decreasing the high rates of occupational injury experienced by construction site. Objective: This analysis describes Personal protective equipment payment methods improvement by revision of occupation safety&health acts. Methodes: Data are show up during the past 9 year statistics for occupation injury cases from actual construction site in Korea construction company. Results: Most construction workers are not wearing PPE because of non-payment of PPE by employer mainly small enterprises. Conclusions: Construction site workers should be buy with job appropriate PPE themselves. Buying of PPE is essential in the near future and government should be provide appropriate compensation for self-buying action such as raise retirement deduction installment or raise of industrial accident insurance.

Although disinfection in drinking water treatment plants provides a safer water supply by inactivating pathogenic microorganisms, harmful disinfection by-products may be formed. In this study, the disinfectant, chlorine, was produced on-site from the electrolysis of salt (NaCl), and the by-products of the disinfection process, bromate and chlorate, were analyzed. The provisional guideline levels for bromate and chlorate in drinking water are 10 μg/L and 700 μg/L, in Korea, respectively. Bromide salt was detected at concentrations ranging from 6.0 ~ 622 mg/kg. Bromate and chlorate were detected at concentrations ranging from non-detect (ND) ~ 45.3mg/L and 40.5 ~ 1,202 mg/L, respectively. When comparing the bromide concentration in the salt to the bromate concentration in the chlorine produced by salt electrolysis, the correlation of bromide to bromate concentration was 0.870 (active chlorine concentration from on-site production: 0.6–0.8%, n=40). The correlation of bromate concentration in the chlorine produced to that in the treated water was 0.866.

이 연구에서는 2013년 경남 농촌현장포럼 마을들을 대상으로 색깔마을 유형과 농촌어메니티자원에 따 라 마을유형을 분류하고 농촌현장포럼 효과를 분석하여 활성화 방안을 제시하였다. 마을유형별 현장포 럼 효과 분석 결과를 토대로 색깔마을 1유형과 하위 30% 마을은 기초인프라와 주민역량강화형, 색깔마 을 2유형과 중위 40% 마을은 체험관광과 2차 산업화형, 색깔마을 3유형과 상위 30% 마을은 체험관광 과 6차 산업화형으로 재유형화 하였다. 또한, 설정된 유형에 따라 앞으로 농촌현장포럼과 마을발전방향 등을 제시하였다.

최근 기후변화 신산업 등장과 성장 및 2015년도 온실가 스 거래제 시행 등으로 산업체 및 관련기관에서 기후변화전 문가의 인력 수요가 폭발적으로 증가할 것으로 예상되고 있다. 따라서 Eco기후환경 융합 인력 양성 사업단은 기후환 경변화와 관련한 기본 및 응용 교육과 현장 훈련을 통한 관련분야 융합지식을 갖춘 전문 인재 양성을 목표로 하고 있다. 지역사회 및 산업체 등 현장 실무형 전문인재 양성을 위하여 교과과정과 연계된 다양한 비교과 프로그램을 운영 하고 있다. 산학협력 가족회사와 연계한 현장실습 지원체계 구축 및 운영을 통한 현장 적응형 인재를 양성하고, 산업사 회에서 요구하는 전공지식을 습득하여 적응능력을 향상시 킨다. 그리고 현장실습과 연계하여 취업하도록 장려하고 있 다. 또한 취·창업, 학술동아리 활동, 캡스톤 디자인 등을 운 영·지원하여 학생들이 스스로 문제를 해결하는 능력을 키우 고, 취업관련 자격증 취득으로 취업률 향상에 기여하고 있 다. 또한, 실무에 바로 적용 가능한 학습을 통하여 학교와 기업체간 상호협력에 긍정적인 영향을 줄 것으로 기대하고 있다.

최근 대한민국 국민들에게 인명, 재산 피해는 물론 불안감을 야기시키는 도로함몰이 사회적으로 큰 이 슈가 되고 있다. 최근 5년간 대한민국의 수도 서울에서 발생한 도로침하, 동공발생, 도로함몰 건수는 총 3,328건이며, 점점 증가하는 추세인 것으로 나타났다. 이러한 도로함몰의 원인은 포장하부에 발생한 동 공의 크기가 커짐에 따라 노상의 지지력이 포장 상부의 하중을 견디지 못해 발생하는 것이며, 이를 예방 하기 위해 사전에 의심구간을 탐사하고 대책을 마련해야 한다. 따라서, 국토교통부에서는 각 지자체에 동 공이 의심되는 구간을 접수 받아 한국건설기술연구원에 협조 요청하여 지표투과탐사장비(GPR)를 이용해 현장조사 하였고, 동공이 탐지되는 구간은 즉시 보수하기로 협의하였다. 지표투과 탐사장비 중 가장 널리 사용되는 GPR(Ground Penetrating Radar)은 대상체에 전자기파를 발 사하여 재료의 성질이 바뀌는 경계면에서 파의 에너지 일부가 반사되고 나머지는 통과하는 특성을 이용한 장 비다. 또한 포장 하부의 상태를 비파괴적이고, 연속적으로 파악할 수 있는 장점을 가지고 있다. 이러한 GPR 을 이용한 탐사는 주파수에 따라 그 특성이 달라지며, 김대상 외(2004)는 조사심도 0m 에서 1.5m 이내에서 는 500MHz~1,600MHz의 안테나가 가장 적합하다고 보고하였다. 본 조사는 대한민국 전국 일반국도 10개 노선의 총 19개 지점에서 진행하였고, 포장하부 동공 의심구간에 한국건설기술연구원에서 보유한 500MHz와 1,600MHz의 레이더를 탑재한 GPR 장비로 그림 1과 같이 계측을 수행하였다. 그림 2와 같이 동공이 의심되 는 구간을 파악하여 주파수 별 결과 값을 비교하고, 포장하부 동공탐사에 적합한 주파수 영역을 제시하였다. 향후 본 연구원에서 제작한 실대형 모의동공 Test Bed에서 본 조사에서 획득한 결과를 검증할 예정이다.

현재 국내에서 시행되고 있는 시멘트 콘크리트 포장의 형식은 줄눈 콘크리트 포장(이하 ʻJCPʼ : Jointed Concrete Pavement)이 대부분이다. JCP 공법은 시공경험이 풍부하고 타 공법에 비해 초기공사비가 저렴 하다는 점에서 가장 많이 쓰여 왔으나 줄눈부의 잦은 손상으로 인한 유지 보수가 필요하며 수축줄눈에 의한 승차감 불량 및 안전 등의 문제점이 발생하였다. 이에 대응하여 2012년부터 한국도로공사와 국토교통부에 서 연속철근콘크리트 포장(이하 ʻCRCPʼ : Continuously Reinforced Concrete Pavement)의 적용이 제안되 었으나 공법특성상 철근배근작업으로 인해 시공상에서 필연적으로 추가 작업 공간이 요구되므로 최근 설계 되고 시공되는 도로포장과 같이 교량과 터널 그리고 상․하행 분리구간에서는 기존 CRCP를 적용할 수 있는 구간은 실질적으로 매우 한정적이다. 이에 포장 공용성 증대를 위하여 JCP포장 위주에서 벗어나, CRCP 포장의 확대적용과 함께 기존 CRCP 공법 의 시공성 해결과 구조적 성능을 향상시킨 연속철근콘크리트 포장의 기계식 시공방법(이하 ʻMRCPʼ : Mechanical-placement Reinforced Concrete Pavement)을 개발하였다. MRCP 장비 및 공법을 이용하여 모 의시공 및 시험시공을 실시한 결과 포설효율 향상을 위한 필요성이 요구되어 추가적인 연구개발을 수행하였다. 연구개발은 기존 MRCP공법 시공시 투입되는 장비인 슬림폼페이버와 철근유도장치의 일체화를 통해 콘크리트 타설, 철근배근 공정을 단순화시키는 일체화 장비개발방향으로 수립하였으며 이에 따라 포설효 율 5~10% 향상, 센서를 통한 철근의 정밀시공 도입, 시공성 10% 향상 및 호퍼용량 개선과 철근이음방안 개선 등을 최종목표로 설정하여 수행하였다. 본 논문에서는 모의시공을 통해 일체화 장비를 이용한 연속철근 콘크리트포장의 기계식 시공방법 현장 검증을 실시하였으며 이를 통해 장비성능 및 공법의 현장검증(장비 작동여부, 철근배근상태, 등)을 실시 하였다. 수행 결과 일체화 장비의 포설 및 시공성 향상을 확인하였으며, 철근유도장비의 기계식 탈부착 및 철근배근 정확성을 검증하였다.