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산업부산물을 활용한 아스팔트 포장용 채움재 개발 및 현장시공 성능평가 연구
조도영(Do-Young Cho),박근배(Keun-Bae Park),우양이(Yang-Yi Woo),문보경(Bo-Kyung Moon) 한국건설순환자원학회 2016 한국건설순환자원학회 논문집 Vol.4 No.3
국내 화력발전소의 추가 증설과 관련하여 발생 부산물의 신규 사용처 연구가 필요한 실정이다. 본 연구에서는 화력발전소에서 발생되는 플라이애시와 열병합발전소에서 발생되는 열병합애시, 배연탈황공정에서 발생되는 탈황석고 등 부산물로부터 아스팔트 포장용 채움재의 KS 규격을 만족하는 채움재를 제조하였다. 제조된 혼합 채움재와 기존 석회석 채움재의 특성을 비교하고, 각각의 채움재를 사용하여 아스팔트 혼합물을 제조하는 실내실험을 통해 특성을 비교하였다. 또한 혼합 채움재와 석회석 채움재를 사용하여 아스팔트 포장 현장실험을 실시하였다. 현장실험에 사용된 아스팔트 혼합물에 대해서 실내실험과 동일하게 동적안정도, 마샬안정도, 인장강도비, 포화도, 간극률, 흐름값을 평가하였다. 실내실험 및 현장시공시험 결과 기존 석회석 채움재를 사용한 경우보다 동적안정도 및 마샬안정도, 인장강도비에서 우수한 특성을 나타내었으며, 배합설계의 최적화를 통해 기존 석회석 채움재의 특성을 만족시키는 채움재 개발 가능성을 확인하였다. In this study, asphalt paving filler, which satisfies the KS standards, were prepared from industrial by-products, such as fly ash generated from thermal power plants, cogeneration ash generated from cogeneration plants, and desulfurized gypsum generated from the flue-gas desulfurization process. The properties of the prepared mixed filler and the existing limestone filler were compared through laboratory tests for preparing asphalt mixture using each filler. In addition, asphalt pavement field tests were conducted using the limestone filler and mixed filler. The dynamic stability, Marshall stability, tensile strength ratio, saturation, porosity, and flow value of the asphalt mixtures used in the field test were evaluated, as was done in the laboratory test. The laboratory and field construction test results revealed outstanding tensile strength ratio, Marshall stability and dynamic stability when using the prepared filler than for the existing limestone filler. Through optimization of the mixing design, the possibility of developing fillers, which the characteristics of the existing limestone filler, was confirmed.
시간 경과에 따른 가수(加水)와 양생조건에 따른 드라이 모르타르의 기초 물성 변화에 관한 평가
조도영(Cho, Do-Young),김규용(Kim, Gyu-Yong) 대한건축학회 2011 大韓建築學會論文集 : 構造系 Vol.27 No.12
Workability and quality control tend to have opposed notion from each other in construction. In the case of Typical Process of wet mortar for finishing work of the building, plastering, masonry and Tile work use adding water method to correct fluidity. and recently, despite using dry mortar which produced in plant, dry mortar also use adding water method to correct Workability. Therefore, Assuming the condition of construction site, we measured fluidity and compressive strength to evaluate effect of adding water and initial wet condition on quality control according to elapsed time. As a result, we recommend that Adding water should be carried out within 30minutes and W/M 1%. Placement should be shut down within one hour to prevent degradation of quality. Finally, We could be found initial wet condition is very important to secure basic properties.
석고 혼입 석탄가스화 슬래그 미분말 치환 시멘트 모르타르의 초기강도 특성
조현서 ( Cho Hyeon-seo ),김민혁 ( Kim Min-hyouck ),이건철 ( Lee Gun-cheol ),조도영 ( Cho Do-young ) 한국건축시공학회 2019 한국건축시공학회 학술발표대회 논문집 Vol.19 No.1
In this study, compressive strength was measured to evaluate the initial strength of cement mortar substituted with coal gasification slag containing desulfurized gypsum, and the reactivity of desulfurized gypsum was confirmed. In order to improve the reactivity, 2% gypsum mixed type and gypsum unfedged type specimens were fabricated and the influence of desulfurization gypsum on compressive strength of coal gasification slag and blast furnace slag fine powder replacement cement mortar was compared and confirmed. As a result of the experiment, it was confirmed that the initial compressive strength of the specimen containing the desulfurized gypsum was improved at the initial stage.