• 토지주택연구
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• 제10권4호
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• pp.13-30
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• 2019

Parking lot within housing site contains public interest of relieving parking space shortage problem and subject to public restriction. If auctioned off at higher price by excessive competition in general competitive bid for land bidders, the development of parking lot will be made against its original purpose supply. The core issue is that a bid price is quite often to be blown out of proportion by 150%~ 250% due to extreme competition and, could face serious problem if a winning bidder runs sale business. If it is rental business, although about 30% of the total floor space of the whole building to be used as neighborhood facilities, too high winning bid price cause to lose transparency. In case of sale at aggregate buildings, most business operators would sell 30% of the neighborhood facilities, spare the parking lot and manages thereof separately. According to Aggregate Buildings Act, neighborhood facilities are allowed for individual registration and ownership of parking lot by business operator or designated person by business operator. In this case, the parking lot becomes 70% of the total floor space of the whole building and 70% of the land share which makes the mortgage very valuable and easier for business operator to get financial loan. There used to be many cases such as owners of neighborhood facilities (aggregate buildings partial owners) who run parking lot to repay their loan running parking lot to repay loan, but found that very tough and reached auction and relatively disadvantaged. For parking lot within housing site, it is recommend to exclude the public factors that land has and take into account of public restriction in area (housing site). Business opportunity for operators and protection of property rights for buyers in aggregate buildings, land supply method is recommended to replace from highest bid method into draw or private contract. In terms of price, supply at estimated price (construction price) and restriction on usage (Co-ownership of parking lot) proposals are submitted.

• 자원환경지질
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• 제53권6호
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• pp.755-769
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• 2020

2019년에 국내에서 채취된 골재에 대하여 광역시도별로 채취현황분석을 실시하였다. 2019년에 전국에서 채취된 골재는 약 1억3천4백만 ㎥로 이 중 모래는 약 4천1백만 ㎥, 자갈은 약 9천3백만 ㎥가 채취되었다. 골재원별로는 선별 파쇄골재(50.3%)가 가장 많이 채취되었으며, 산림골재(41.4%), 육상골재(3.3%), 바다골재(1.7%), 선별세척(1.7%), 하천 골재(0.7%) 순이다. 이는 선별파쇄골재와 산림골재가 국내 골재채취의 주생산지임을 말해준다. 권역별로 보면 경기도가 국내 골재 채취의 약 30%를 점하며, 그 다음으로 경상남도, 충청북도, 강원도, 경상북도, 충청남도의 순이다. 주로 채취되는 골재는 지역적으로 차이가 있다. 경기도는 선별파쇄골재가 가장 많이 채취되며, 경상남도는 산림골재가 가장 많이 채취된다. 또한 육상골재는 경상북도와 강원도에서 채취가 가장 많이 되는 등 지역에 따라 채취가 용이한 골재의 종류가 다르다. 2019년도 골재채취의 특징은 하천골재와 바다골재의 채취가 현저히 줄어든 반면 선별파쇄와 산림골재의 채취가 증가하여 전체 골재채취물량의 약 90%가 넘는다는 것이다. 따라서 골재자원의 향후 수급에 있어 선별파쇄와 산림골재에 우선적인 정책방향이 있어야 할 것으로 판단된다.

• 자원환경지질
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• 제54권4호
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• pp.427-439
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• 2021

이번 연구에서는 골재채취통계를 기초로 하여 골재의 채취현황을 분석하고, 향후 골재의 안정적이고 지속적인 수급을 예측하고자 하였다. 2019년에는 전국 229개 시군구 중 약 65%인 148개 시군구에서 한 종류 이상의 골재를 개발하였다. 7대 광역시에서는 19개 시군구에서 골재를 개발되었다. 광역시를 제외하면 8개도의 155개 시군 중 83%인 129개 시군에서 골재개발이 이루어져 우리나라의 대부분 시군에서 골재를 개발하고 있다고 볼 수 있다. 모래는 110개 시군구에서, 자갈은 132개 시군구에서 개발되었다. 골재원별로 볼 때 하천골재는 4개 시군구, 육상골재는 42개 시군구, 산림골재는 75개 시군구, 선별파쇄골재는 105개 시군구, 선별세척골재는 15개 시군구에서 개발되었다. 또한 육지원 골재의 채취가 전혀 이루어지지 않은 시군구는 81개 지역이다. 골재원별로 볼 때 한 종류의 골재만 개발하는 시군구는 71개, 두 종류의 골재를 개발하는 시군구는 55개, 3종류 이상은 22개 시군구이다. 2019년에 골재의 개발이 가장 많은 지역은 울주군이며, 그 다음으로 화성시, 청주시, 포천시, 파주시, 용인시, 김해시, 광주시의 순이다. 100만m³ 이상의 골재를 개발한 지역은 41개 시군구로 시군구은 골재채취 시군구의 약 28%이지만 골재개발량은 2019년도 총 개발량의 약 70%를 점유한다. 이는 각 시군의 골재채취가 대형화, 집중화되고 있음을 보여준다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2002년도 학술논문발표회
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• pp.51-55
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• 2002

The production accounts of domestic by-product is increased after 1990's. It is worried about the life reduction of dump land, as dump land's capacity have reached to limitation and the amount of construction industrial wastes is going higher Recently, Recycling aggregates could be gained from the reconstruction works using recycle process. and the study and research of recycle concretes developed concrete application methods, It could put some outcome of studies to practical use for concrete products. The methods of crushing waste concrete are going diverse. In this study, the fundamental experiments and recycling application is investigated and analyzed with use of recycling aggregate which made of mechanical crush and underwater electrical impact crush. and the difference between underwater electrical impact crush, mechanical crush and natural aggregates is studied.

• 콘크리트학회논문집
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• 제28권4호
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• pp.445-454
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• 2016

노후 시설물의 증가에 따라 건설폐기물은 일정 수준까지 증가한 이후, 현재는 어느 정도 안정화 된 추세에 있지만, 전체폐기물 중에서 건설폐기물은 아직까지도 가장 큰 비중을 차지하고 있다. 또한, 천연 골재 채취 금지에 의한 골재 난 심화 및 골재 공급원 개발에 의한 국토훼손과 자연환경 파괴 등에 따라 환경복원에 막대한 국가예산 소요가 불가피한 상황이다. 이에 대한 대책 방안으로 국토교통부는 순환 골재 품질기준을 공포하여 순환 골재 품질에 따른 용도와 관리를 할 수 있도록 추진하고 있으나, 경제적 부가가치가 높은 용도로의 활용은 아직 저조한 실정이다. 따라서, 본 연구에서는 저자의 선행연구에서 제시한 탄산화 개질 조건인 $20^{\circ}C$, RH 60%, $CO_2$ 20%에서 순환 잔골재 4일, 순환 굵은 골재 14일간 탄산화를 실시한 순환 골재의 품질개선효과 및 이를 이용한 순환 골재 콘크리트의 성능 평가를 통하여 구조용 콘크리트로의 적용 가능성에 대한 실마리를 찾고자 한다. 그 결과, 탄산화 개질을 통하여 순환 잔골재의 흡수율이 0.91%, 순환 굵은 골재의 흡수율이 0.7% 저감되어 품질개선에 기여하였다. 또한, 탄산화 개질 골재를 이용한 순환 골재 콘크리트의 물리적 특성 및 내구성능이 일반 콘크리트와 유사한 결과를 나타내어 구조용 콘크리트로의 적용 가능성을 확인하였다.

• 환경영향평가
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• 제13권5호
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• pp.263-276
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• 2004

This research is primarily intended to propose a new concept for aggregate control of impervious coverage using remote sensing and GIS. An empirical study for a case study site was conducted to demonstrate how a standard remote sensing and GIS technology can be used to assist in implementing the aggregate control for impervious coverage as intermediary between decision makers and scientists. Guidelines for a replicable methodology are presented to provide a strong theoretical basis for the standardization of factors involved in the aggregate control; the meaningful definition of land mosaic in terms of pervious areas, classification of pervious intensity, change detection for pervious areas. Detailed visual maps (e.g. estimation of impervious surface allowable) can be generated over large areas quickly and easily to increase the scientific and objective decision-making for the aggregate control. It is anticipated that this research output could be used as a valuable reference to confirm the potential of remote sensing and GIS in the aggregate control for impervious coverage.

• 토지주택연구
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• 제2권4호
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• pp.471-477
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• 2011

This paper will describe the experimental results on the shear behaviors of reinforced concrete (RC) beam with recycled coarse aggregate (RCA). The primary objective of this research is to evaluate the influences of different RCA replacement percentage (i.e, 0%, 30%, 60%, and 100%) on the shear performance of reinforced concrete beams without shear reinforcement. Eight large-scale RC beams without shear reinforcement were manufactured and tested to shear failure. All had a rectangular cross-section with 400mm width ${\times}$ 600mm depth and 6000mm length, and were tested with a shear span-to-depth of 5.1. The results showed that the deflection and shear strength were little affected by the different RCA replacement percentage. Actual shear strength of each RCA beam was compared with the shear strength predicted using the provisions of ACI 318 code and Zsutty'e equation for shear design of RC beams. ACI 318 code predicted the shear strength of RCA reinforced concrete beams well.

• 한국건축시공학회지
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• 제3권1호
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• pp.123-129
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• 2003

The production accounts of domestic by-product is increased after 1990's. It is worried about the life reduction of dump land, as dump land's capacity have reached to limitation and the amount of construction industrial wastes is going higher. Recently, recycling aggregates could be gained from the reconstruction works using recycle process, and the study research of recycle concretes developed concrete application methods. It could put some outcome of studies to practical use for concrete products. The methods of crushing waste concrete are going diverse. In this study. the fundamental experiments and recycling application is investigated and analyzed with use of recycling aggregate which made of mechanical crush and underwater electrical impact crush, and the difference between underwater electrical impact crush, mechanical crush and natural aggregates is studied.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2015년도 추계 학술논문 발표대회
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• pp.113-114
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• 2015

This paper is to investigate the effect of poor quality aggregate source used in Korea on the mixture proportion and strength development of the high strength concrete fixed at 450 kg/m3 of cement contents. For aggregate kinds, good quality crushed stone from KS certified manufacturer and low quality crushed stone from non certified construction field are used. For fine aggregates, river sand, land sand, sea sand and mixed sand are also used. It is found that the use of low quality aggregates resulted in an increase of water demand considerably due to poor gradation of aggregate and excessive fine particles. Test results indicate that the use of low quality aggregate also decreases the compressive strength compared with that of good quality aggregate.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2019년도 추계 학술논문 발표대회
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• pp.147-148
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• 2019

Lack of fine aggregate is adversely affecting the quality of concrete. Due to lack of land sand, EZZ sea sand has been used. However, the use of sea sand is also difficult because of the opposition of fishermen. The purpose of this study was to analysis the effect of slag fine aggregate to durability and compressive strength of concrete. The concrete compressive strength and durability were assessed to derive a proper mix ratio of fine aggregate.