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플라이애시 정제가 콘크리트의 공학적 특성에 미치는 영향
문병룡,한민철,한천구 청주대학교 산업과학연구소 2017 産業科學硏究 Vol.35 No.1
This study investigates the effect of the use of fly ash(FA), in accordance with refinement, as the substitutions of cement on the engineering properties of the concrete. Three different types of FA were used such as raw fly ash, refined fly ash and reject ash. Test results indicated that only slump increased when refined FA was used, while the use of unrefined raw material and reject Ash resulted in a decrease in slump. The use of refined fly ash affects favorably the qualities of hardened concrete including frost-resistance.
액체밀도계에 의한 고로슬래그 미분말 분말도 신속평가에서의 영향인자 분석
문병룡 ( Moon Byeong-yong ),김민상 ( Kim Min-sang ),이제현 ( Lee Jea-hyeon ),주은희 ( Joo Eun-hui ),한민철 ( Han Min-cheol ),한천구 ( Han Cheon-goo ) 한국건축시공학회 2017 한국건축시공학회 학술발표대회 논문집 Vol.17 No.2
In this research, the blast-furnace slag powder using the hydrometer also attempted to analysis the influence factor due to the temperature change of water and sample, and the number of upside down turns at the time of rapid evaluation. As a result, the influence of the number of turn was not large, but was the temperature of the water and sample are greatly affected.
Hydrometer법에 의한 밀도 값과 시험 성적서간 상관분석을 통한 플라이애시의 품질분석
문병룡 ( Moon Byeong-yong ),김태우 ( Kim Tae-woo ),이재진 ( Lee Jae-jin ),송흥호 ( Song Heung-ho ),한민철 ( Han Min-cheol ),한천구 ( Han Cheon-goo ) 한국건축시공학회 2017 한국건축시공학회 학술발표대회 논문집 Vol.17 No.1
Basic lot tests via textile and visual examinations are conducted on FA carried into in-service RMCs. The system of evaluating quality by taking samples from each lot and examining them, or evaluating quality based on the score reports submitted by the deliverer during in-service training have on some instances been called into doubt as to their reliability in evaluating the quality of FA. Therefore this study sought to measure the density value of FA that is actually delivered to RMC companies according to the Hydrometer method and analyze its correlation to its test scores, to in turn analyze the reliability of the test reports and the characteristics of the quality of FA. The results led to the conclusion that the fineness and density marked on the score reports were problematic, and therefore accurate experiments and adjustment of significant digits on the test report are necessary.