활성탄을 잔골재로 이용한 친환경 모르타르 개발에 관한 연구

우종권,류현기,홍상희,전경빈 한국건축시공학회 2006 한국건축시공학회지 Vol.6 No.2

Modern residing equipment developed much quantitatively along with economic growth but improvement for agreeable residing space of indoor environment is insufficient situation yet. Also, the latest sick-building syndrome discharging room contaminant such as Formaldehyde, toluene, radon etc. built house or buildings newly human body threaten. Radon of them is real condition that raise origination of lung cancer next to smoke. So, wish to in this research by one of solution way of these problems adsorption performance and specie performance excellent activated carbon to mortar for deconstipating suppository that is room finish fare mix and examine closely after grasp physical, mechanical special quality, hazardous substance and specie performance effect. According to result that estimate friendly-environment performance, the CO2 absorption amount displayed decrease effect more than about 90% in activated carbon metathesis rate 80% and radon release amount displayed tendency that decrease about 75 ~ 85% in activated carbon metathesis rate 80%.

카본계 흡착재를 사용한 수질 개선용 콘크리트의 개발에 관한 기초적연구 - 물리적 특성을 중심으로 -

우종권,홍상희,류현기 대한건축학회지회연합회 2006 대한건축학회지회연합회 학술발표대회논문집 Vol.2 No.1

The purpose of this study is to set mixing rate as activated absorbent replacement rate changes to develop water tank and water road which enable the quality of water to be improved, and to find way to use environment friendly concrete by analysing physical characteristics of concrete, and as a result, characteristics of fresh concrete are decreased as activated carbon replacement rate is increased and bleeding quantity is increased as replacement rate is increased. For hardening concrete, compressive strength, tensile strength and length changing rate are increased as activated carbon absorbent replacement rate is decreased, and water tight shows the increasing trend as replacement rate is increased.

순환 굵은골재 및 혼화재를 이용한 밑창콘크리트의 기초적 특성 분석

우종권,류현기 대한건축학회지회연합회 2007 대한건축학회지회연합회 학술발표대회논문집 Vol.2007 No.1

This research examines basic property of sub-slab concrete mixed with recycled coarse aggregate, according to different unit quantity, replacement ratio of fine and coarse aggregate, BFS, and FA; the purpose is to encourage use of recycled aggregate. In case of fresh concrete, the fluidity increased along with the replacement ratio for recycled coarse aggregate; the air volume became larger in mixed concrete than in plain as the replacement ratio for recycled coarse aggregate increased. Mass for unit volume declined with the increasing replacement ratio. As for hardened concrete, compressive and tensile strength of mixed concrete reached over 80% of plain concrete, up to the replacement ratio of 30%. For drying shrinkage, the change in length became greater for mixed concrete than for plain as the replacement ratio increased.

활석 미분말의 콘크리트용 혼화재료로써 활용가능성에 관한 연구

우종권,류현기 한국건축시공학회 2006 한국건축시공학회지 Vol.6 No.4

Admixture materials are used in mixing concrete or mortar to improve quality and performance of the concrete. This study examines the potential use of talc as a substitute for cement, the benefits of recycling waste resources for economical efficiency and quality improvement of concrete. The test was carried out by replacing the plain mix with fine grains of talc at the rate of 10%, 20%, and 30%. Talc was divided into three groups depending on the degree of pulverizing. For wet concrete, porosity, slump, bleeding per unit, and setting time by penetration resistance were measured; similarly, for dry concrete, strength and watertight property were tested. Test results showed that the amount of bleeding and setting time could be shortened, but the strength and watertight proofing severely deteriorated. However, at the replacement rate of 10%, talc showed equal performance with the plain at all degrees of pulverization, which suggests its potential use as admixture material.

산업재해통계기반 Risk 산정에 관한 연구

우종권,이미정,설문수,백종배,Woo, Jong-Gwon,Lee, Mi-Jeong,Seol, Mun-Su,Baek, Jong-Bae 한국안전학회 2021 한국안전학회지 Vol.36 No.4

Risk assessment techniques are processes used to evaluate hazardous risk factors in construction sites, facilities, raw materials, machinery, and equipment, and to estimate the size of risk that could lead to injury or disease, and establish countermeasures. The most important thing in assessing risk is calculating the size of the risk. If the size of the risk cannot be calculated objectively and quantitatively, all members who participated in the evaluation would passively engage in establishing and implementing appropriate measures. Therefore, this study focused on predicting accidents that are expected to occur in the future based on past occupational accident statistics, and quantifying the size of the risk in an overview. The technique employed in this study differs from other risk assessment techniques in that the subjective elements of evaluators were excluded as much as possible by utilizing past occupational accident statistics. This study aims to calculate the size of the risk, regardless of evaluators, such as a manager, supervisor, safety manager, or employee. The size of the risk is the combination of the likelihood and severity of an accident. In this study, the likelihood of an accident was evaluated using the theory of Bud Accident Chainability, and the severity of an accident was calculated using the occupational accident statistics over the past five years according to the accident classification by the International Labor Organization.

폐석회석의 분말도 변화에 따른 콘크리트의 특성분석

류현기,우종권 한국건축시공학회 2007 한국건축시공학회지 Vol.7 No.1

According as industry develops rapidly, problem of resources exhaustion and environmental pollution is appearing. Way to use construction waste that is development of new compound material and Industry product is required. Limestone powder that is Industry product is CaCO3, and vicosity is promotion effect because there is no damage to hydration of cement and powder is very thin and water tightness increases.This research purposed to analyze concrete property changing limestone fineness. According as the limestone powdered replacement ratio increases, slump and unit capacity mass increased, and the air content decreased according as the replacement ratio increases. Compressive strength and tensile strength decreased according as the limestone powder replacement ratio increases.

단위수량 변화에 따른 혼화제 종류 및 첨가량별 콘크리트의 특성 분석

류현기,조명근,우종권 한국건축시공학회 2007 한국건축시공학회지 Vol.7 No.4

The purpose of this study is to analyze concrete characteristics by admixing agent and additive contents according to the change of unit-water to identify its effect on compressive strength. First of all, as for flesh concrete, overall unit-water showed a tendency to decrease as component inclusion rate of admixing agent was increased. In addition, air content showed a tendency to increase by increasing WR, WB, NP series admixing agent contents, on the other hand, the change of air content was gentle by around 1.5±0.5% for S, T, M series agents. Bulk density showed an inverse proportion to the change of air content. As for hardened concrete, expression rate of 3-day age compressive strength was generally decreased for S, T, WR, WB, NP, M series admixing agent component. Also, expression rate of 7-day age compressive strength showed an excellent record for S, M series agents, and expression rate of 28-day age compressive strength showed a tendency to increase more than plain on the whole.

카본계 흡착재를 이용한 수질개선용 친환경 콘크리트 개발에 관한 기초적 연구

류현기(Ryu Hyun-Gi),우종권(Woo Jong-Kwon) 대한건축학회 2007 大韓建築學會論文集 : 構造系 Vol.23 No.12

The research pursues to establish foundation to manufacture concrete for water tanks and channels to improve water quality; the purpose is to set mixture ratio according to various replacement rate for carbon absorbent, to analyze physical property of concrete, and to seek methods to apply concrete in an environment-friendly manner. The result showed that in case of fresh concrete, as the replacement rate for carbon absorbent increased, air volume and slump declined, while the amount of bleeding increased. Regarding hardened concrete, as the replacement rate for carbon absorbent increased, compressive and tensile strength, and change of length decreased, while the absorptivity increased. In evaluating water quality, the amount of floating material and heavy metals Cu?, Cd? decreased by 20~40% with increasing replacement rate for carbon absorbent.