• Title/Summary/Keyword: Mixed-use

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A Fundamental Study on Supply Status and Use Plan of Fine Aggregates (잔골재의 수급현황 및 활용방안에 관한 기초적 연구)

  • Yu Myoung Youl;Lee Sea-Hyun;Lee Hyun-Soo
    • Proceedings of the Korea Concrete Institute Conference
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    • 2005.05b
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    • pp.101-104
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    • 2005

  • It analyzed the supply status of fine aggregate and find the point of issue related alternative fine aggregate through researches and interviews. The conclusions of the study are as follows. 1. Ready mixed concrete manufacture used crushed fine aggregate (15.5$\%$) and recycled fine aggregate (1.5$\%$) for alternatives aggregate than 1.3$\%$ in 1991. It is not allowed to use a recycled fine aggregate in ready mixed concrete, but they used it. 2. All alternative aggregate are satisfied the Korean Standard, But they showed low properties of mortar compared to when it replaced with natural fine aggregate. So, it is needed to make another special Korean Standard to use alternative aggregate in normal concrete by mixing method to recover the workability and compressive strength.

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Soil organic carbon variation in relation to land use changes: the case of Birr watershed, upper Blue Nile River Basin, Ethiopia

  • Amanuel, Wondimagegn;Yimer, Fantaw;Karltun, Erik
    • Journal of Ecology and Environment
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    • v.42 no.3
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    • pp.128-138
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    • 2018

  • Background: This study investigated the variation of soil organic carbon in four land cover types: natural and mixed forest, cultivated land, Eucalyptus plantation and open bush land. The study was conducted in the Birr watershed of the upper Blue Nile ('Abbay') river basin. Methods: The data was subjected to a two-way of ANOVA analysis using the general linear model (GLM) procedures of SAS. Pairwise comparison method was also used to assess the mean difference of the land uses and depth levels depending on soil properties. Total of 148 soil samples were collected from two depth layers: 0-10 and 10-20 cm. Results: The results showed that overall mean soil organic carbon stock was higher under natural and mixed forest land use compared with other land use types and at all depths ($29.62{\pm}1.95Mg\;C\;ha^{-1}$), which was 36.14, 28.36, and 27.63% more than in cultivated land, open bush land, and Eucalyptus plantation, respectively. This could be due to greater inputs of vegetation and reduced decomposition of organic matter. On the other hand, the lowest soil organic carbon stock under cultivated land could be due to reduced inputs of organic matter and frequent tillage which encouraged oxidation of organic matter. Conclusions: Hence, carbon concentrations and stocks under natural and mixed forest and Eucalyptus plantation were higher than other land use types suggesting that two management strategies for improving soil conditions in the watershed: to maintain and preserve the forest in order to maintain carbon storage in the future and to recover abandoned crop land and degraded lands by establishing tree plantations to avoid overharvesting in natural forests.

  • https://doi.org/10.1186/s41610-018-0076-1 인용 PDF KSCI

A Study on Management Plans through Case Analysis of Residential Complexes in Commercial Areas in Daejeon (대전시 상업지역 주거복합건축물 사례 분석을 통한 관리방안 연구)

  • Ryu, Kyungsoo
    • Journal of the Korean Regional Science Association
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    • v.39 no.2
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    • pp.63-76
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    • 2023

  • Recently, due to the location of residential complexes in commercial areas of large cities, the urban function is shifting from commercial to residential.In order to improve the use volume system in the commercial area of Daejeon Metropolitan City, the system of special and metropolitan cities was compared and analyzed, and problems were derived by analyzing 8 cases. First, use classification of mixed-residential buildings, Second, unbalance of urban planning for functional loss of commercial area, Thrid, damage on urban environment due to difference of development density. Accordingly, improvement measures include First, securing the ratio of residential function and mixed use at least 10%, Second, securing urban competitiveness by inducing facilities that combine various uses and functions. The overall floor area ratio of housing is applied, Third, the development density is presented through the establishment of the district unit plan and consultation.

  • https://doi.org/10.22669/krsa.2023.39.2.063 인용 PDF

Street Environment Improvement Plan Resulting from the Functional Transition of Residential Area - Focused on the land reallocation project in the 1970's of the Metropolitan City of Daegu - (주택지의 기능변화에 따른 가로환경 개선 방안 - 대구시의 1970년대 토지구획정리사업지구를 중심으로 -)

  • Kim, Han-Soo
    • Journal of the Korean housing association
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    • v.25 no.6
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    • pp.19-26
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    • 2014

  • This study aims to derive street design alternative which can be applied to residential area as the functions of land use have been changed. The main findings are as follows; First, the study area in this research is on the process of the functional transition from full residential use to residential-commercial mixed use with cafes and restaurants. Second, dead-end streets in residential areas needs to be widened in order to meet the increasing needs of pedestrians and cars. One of the suggested strategies is to remove fences on the dead-end streets. Third, based on the main findings, this research can suggest following policies. Citizen participation is necessary in building land use plans and space design in old residential areas. Citizens can participate in architectural and landscape contracts, district-unit plan with the help of experts such as urban planners and architects.

  • https://doi.org/10.6107/JKHA.2014.25.6.019 인용 PDF KSCI