• 한국도로학회:학술대회논문집
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• 2010.09a
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• pp.67-72
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• 2010

• Proceedings of the Korea Water Resources Association Conference
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• 2020.06a
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• pp.331-331
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• 2020

급격한 산업화와 도시화로 인한 도시유역의 불투수면의 증가와 이에 따른 배수능력의 저하로 인해 도시 물순환의 왜곡이 발생하였다. 따라서 과거 도시 물관리 기법의 한계가 나타났으며 이를 위해 저영향개발 기법 등과 같은 도시 물관리 기법의 패러다임이 변화하였다. 본 연구에서는 저영향개발 기법에서 도시유역 내 활용이 유용한 침투형 시설 중 투수블럭에 대한 물순환 성능평가를 실외실험을 통해 분석하였다. 성능평가 실험은 부산대학교 양산캠퍼스 한국 GI&LID 센터 내 투수블록 뿐만 아니라 블록 하부 골재층까지 설치가 가능하도록 되어있어 실제 현장과 유사한 환경을 구축이 가능한 2.4×10.9×0.4 (m) 규모의 주차장형 LID 실증시험시설을 활용하였다. 인공강우 분사를 위한 실외 인공강우모사 장치 크기는 2×2(m)으로 본 시험을 위하여 5개의 인공강우모사 장치를 연결하여 활용하였으며, 본 시험장치는 강우를 공급하기 위한 수조와 펌프, 일정한 유량을 유입하기 위한 유량계, 강우를 분사하기 위한 노즐, 인공강우가 실제 강우와 같이 자유낙하 하도록 구현하기 위한 오실레이터 등으로 구성되었다. 시험대상인 틈새투수블록은 석재블록 규격 400×600×100 mm이며 재질은 받침안정층(흙), 투수블록(화강석)으로 구성되어 있다. 실험의 시나리오는 시험체에 강우강도 30mm/hr, 50mm/hr, 100mm/hr에 해당하는 양을 1시간 동안 유입하여 시험 시작 후, 강우지속시간, 표면유출지속시간, 표면유출량을 1분 단위로 측정. 시험체에 유공관이 설치된 경우에는 침투유출지속시간, 침투유출량도 함께 1분 단위로 측정하였으며 각 강우강도별로 측정하고, 1회 측정 후, 각 시험별 시험 대상체의 조건을 같게 하기 위한(하부 지반의 건조) 약 3일 이후(상황에 따라 변동 가능) 시험하였다. 본 실험의 결과, 강우강도가 30 mm/hr와 50 mm/hr인 경우에는 화강석 틈새투수블록포장에서 지표 유출이 발생하지 않았으며, 강우강도 100 mm/hr의 경우 260 L의 지표 유출이 발생하여, 불투수표면 대비 84%의 지표유출 저감률을 보여줌으로서 투수블럭에 물순환 성능에 대한 효과를 분석하였다.

• Journal of the Korea institute for structural maintenance and inspection
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• v.24 no.5
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• pp.69-76
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• 2020

Global warming is a very important problem as it causes rapid climate change and natural disasters. Therefore, researches related to renewable energy are being actively conducted while promoting policies such as reducing carbon dioxide emission and increasing the proportion of renewable energy. Solar power generation is being applied in urban areas like BIPV as well as existing idle areas outside the city. Therefore, in this study, precast concrete blocks developed for paving roadways capable of solar power generation were designed and constructed. For the evaluation of field applicability for 6 months, skid resistance and block settlement were measured. As a result of the experiment, it was found that skid resistance satisfies the standard of general roadway in Korea, but not the standard of highway. The skid resistance tended to decrease as time passed. In addition, the settlement of the block gradually increased slightly, but it is much smaller than the allowable settlement of the roadway. Therefore, it is necessary to establish a maintenance period and method based on the periodic measurement results in the future.

• Ecology and Resilient Infrastructure
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• v.4 no.4
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• pp.187-192
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• 2017

This study evaluated the reduction performance of ambient temperature and the amount of evaporation that takes place depends on the temperature difference of paving blocks which are used in the sidewalk, roadway, parking lot, park, plaza, and etc. The water-retentive block of the LID (Low Impact Development) practice was compared with the conventional concrete block. For the quantitative performance evaluation, experiments were performed in a climatic environment chamber capable of controlling the climatic environment (solar radiation, temperature, humidity, rainfall, and snowfall). The method for performance evaluation was proposed using temperature, humidity, and ambient air of paving blocks which changes according to the solar radiation and the wind speed after the rainfall. As a result, the evaporation amount of the water-retentive block was 2.6 times higher than that of the concrete block, the surface temperature of water-retentive block was $10^{\circ}C$ lower than the concrete block, and the air temperature of water-retentive block was $4.6^{\circ}C$ lower than the concrete block. Therefore, it is analyzed that the water-retentive block with a large amount of evaporation is more effective in reducing the urban heat island phenomenon as compared with the concrete block.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.10
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• pp.5176-5183
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• 2013

In general, Korean Lightweight Concrete used Heat insulating material for building and filler for civil construction, backfill material for tunnel, office floor fillers, lightweight blocks and so on. These expand the range of use ALC(autoclaved lightweight concrete) on the soft-ground at regular intervals during road construction by installing piles used as substrates for the process is under study. In this study, behavior characteristics on the soft-ground of pavement analysis was used to test the geo-Centrifuge. Prototype pavement reduced to 1/30 slab form of the composition as kaolinite model tests were conducted in the soft ground. Pile Arrangement (having 36 component pile with an array of $3{\times}12$) was used to group of piles. Tests of gravity 30 level the centrifugal force acting Light-weight pavement models. Based on the Prototype pavement of the behavior characteristics of pavement behavior characteristics were estimated. FMA analysis of the 10 times as big 39.4kg (actual load 35 ton) of the lateral load is applied to the case 7.8mm (actual behavior 23.4mm) behavior was fine.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.34 no.1
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• pp.19-25
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• 2022

Physical experiments were conducted to establish an empirical formula that predicts the wave force on the upside of the pavement behind crown wall of rubble mound seawall due to wave overtopping as well as the uplift force on the downside of the pavement. The experiments were performed by different conditions of the parapet, water depth, relative freeboard, and thickness of the armour layer. Then, the wave force on the upside and downside of the pavement behind the crown wall was analyzed. The parameters that affect the wave overtopping force and the uplift force were identified and empirical formulae were suggested for evaluating the forces on the pavement.

• Journal of the Korea Institute of Building Construction
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• v.23 no.2
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• pp.153-164
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• 2023

The objective of this study is to examine the removal rate of air pollutants, specifically sulfur oxides (SO_x) and nitrogen oxides(NO_x), using concrete permeable blocks containing zeolite beads coated with materials capable of eliminating these pollutants. Titanium dioxide(TiO₂) powder and coconut shell powder were utilized for the removal of SO_x and NO_x and were applied as coatings on the zeolite beads. Concrete permeable block specimens embedded with the coated zeolite beads were produced using an actual factory production line. Test results demonstrated that the concrete permeable block containing zeolite beads coated with coconut shell powder in the surface layer achieved SO_x and NO_x removal rates of 12.5% and 99%, respectively, exhibiting superior performance compared to other blocks. Additionally, the flexural strength and slip resistance were 5.3MPa and 65BPN or higher, respectively, satisfying the requirements specified in KS F 4419 and KS F 4561. Conversely, the permeability coefficient exhibited low permeability, with grades 2 and 3 before and after contaminant pollution, according to the standard for 'design, construction, and maintenance of pavement using permeable block'. In conclusion, incorporating zeolite beads coated with coconut shell powder in the surface layer enables simultaneous removal of SO_x and NO_x, irrespective of ultraviolet rays, while maintaining adequate flexural strength and slip resistance. However, the permeability is significantly reduced, necessitating further improvements.

• Journal of Korean Society of Transportation
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• v.27 no.2
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• pp.189-197
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• 2009

The purpose of this study is to analyze the relationships between the traffic accidents of elderly pedestrians and barrier-free facilities in the case of Cheongju. First, many accidents of elderly pedestrians were determined to occur in the road and during crossing. Second, the correlation analysis shows that the paving conditions, guiding blocks and embossed blocks have impacts on elderly safety. Finally, the logistic regression model, which is statistically significant (chi-square =0.000, Nagelkerke =0.198), was developed, and includes the paving conditions, bollards, audible signals and remaining time signs as the independent variables. The variables, with the exception of the existence of bollards, are all analyzed to have positive impacts to elderly safety.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2021.05a
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• pp.271-272
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• 2021

The maintenance and repair work of sidewalk block pavement is a construction that requires a large amount of budget to be invested every year. It is important to establish an appropriate standards for estimating construction cost to ensure proper budgeting and quality. In this study, the standards for estimating the cost of maintenance and construction work for sidewalk blocks that can be applied to the construction volume classified according to the site conditions, construction type, and equipment use differentiated from new construction was established. As a result, the daily construction volume was presented by reflecting excavator and truck as equipment in the combination of paver and common worker. The re-installation was applied by separating the construction volume of sections with general blocks and induction/raised blocks based on the installation of sidewalk blocks after demolition. Generally if block cutting is necessary, the precision construction conditions using a cutting machine were taken into consideration to secure the construction quality. In addition, it has been revised to apply classified construction volume into A and B-Type depending on the park and site conditions.

• Proceedings of the Korea Water Resources Association Conference
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• 2022.05a
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• pp.507-507
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• 2022

작물 재배에서 정밀 관개 및 물관리를 위해 토양수분 모니터링이 필수적이며, 최근 이상기후에 따른 가뭄 빈도가 증가함에 따라 토양수분 변동에 따른 적절한 대응이 필요한 실정이다. 특히, 국산밀 생장기의 토양수분 및 관개는 생산성에 중요한 영향을 미치고 있으나, 빈번한 봄가뭄의 영향으로 작물 생산 및 품질 관리의 어려움을 겪고 있다. 따라서 국산밀의 안정적 생산을 위한 토양수분 및 양분 관리에 대한 연구가 필요하다. 본 연구에서는 ICT 기반의 토양 층위별 모니터링 시스템을 구축하여 물관리에 따른 국산밀의 안정적 생산성을 분석하고자 한다. 대상지역은 전라북도 남원시 운봉읍에 위치한 국립식량과학원 운봉시험지이며, 시험포장은 수분처리 조건에 따라 총 4개(A: 한발조건, B: 적정수분, C: 무처리) 처리구로 3개 블록을 구분하여 4반복으로 구성하였다. ICT 기반 10개 토양수분 및 EC (Electrical conductivity) 관측 장비를 통해 실시간으로 자료 수집하였으며, 밀 생육조사는 생육단계별 초장, LAI, 지상부 및 지중 생체중 등 자료를 수집하였다. 수집된 자료는 처리구별 물관리에 따른 토양수분과 생육지표의 상관관계 분석을 통해 가뭄에 따른 생육 영향과 적정 관개용수의 공급시기 및 공급량을 분석하였다. 본 연구는 밀 생장기의 봄가뭄에 대응하기 위한 물관리 기초자료로 활용하고자 하며, ICT 기반의 스마트관리 플랫폼을 개발하여 밀 작황 진단 및 예측을 통해 국산밀의 안정적 생산성에 기여하고자 한다.