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사전혼합골재로서 미정제 플라이애시가 굳지않은 콘크리트에 미치는 영향
현승용 ( Hyun Seong Yong ),박경택 ( Park Kyung Taek ),박구병 ( Park Goo Byeong ),한민철 ( Han Min Cheol ),한천구 ( Han Cheon Goo ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.2
The objective of this paper is to provide the feasibility of premixed type ternary blended aggregates using raw fly ash(Ra), crushed sand(CS) and sea sand(SS) by studying fresh properties of the concrete. Ra is varied from 2.5% to 10% with interval of 2.5% by weight of mixed aggregates. Test results indicates that the replacement of Ra by mixed aggregates with low quality crushed sand and sea sand resulted in decrease of slump and air contents due to increased viscosity.
리젝트애시를 사전혼합 골재로 활용하는 굳지않은 콘크리트의 특성
현승용 ( Hyun Seong Yong ),박병문 ( Park Byung Moon ),박구병 ( Park Goo Byeong ),한민철 ( Han Min Cheol ),한천구 ( Han Cheon Goo ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.2
The objective of this paper is to offer the feasibility of premixed type ternary blended aggregates using reject ash(RA), crushed sand(CS) and sea sand(SS) by studying fresh properties of the concrete. RA is varied from 2.5% to 10% with interval of 2.5% by weight of mixed aggregates. Test results indicates that the replacement of RA by mixed aggregates with low quality crushed sand and sea sand resulted in decrease of slump and air contents.
화력발전부산물을 골재로 사전혼합한 혼합골재 사용 시멘트 모르타르의 공학적 특성
현승용 ( Hyun Seong-yong ),김민상 ( Kim Mis-sang ),이제현 ( Lee Jea-hyeon ),박병문 ( Park Byeong-moon ),한민철 ( Han Min-cheol ),한천구 ( Han Cheon-goo ) 한국건축시공학회 2017 한국건축시공학회 학술발표대회 논문집 Vol.17 No.1
In this study, the fundamental properties of cement mortar in relation to the change of the replacement ratio of the RA(Reject-Ash) were analyzed by mixing RA to the mixed aggregate consisting of poorly graded fine rock aggregate and marine aggregate for quality improvement. It was found that replacing 5% of the mixed aggregate with RA could improve the quality of the aggregate to the degree of fine rock aggregates.
리젝트애시를 사전혼합골재로 활용시 AE제에 의한 공기량 확보방안
현승용 ( Hyun Seong-yong ),문병룡 ( Moon Byong-yong ),이제현 ( Lee Jea-hyeon ),장덕배 ( Jang Dik-bae ),한민철 ( Han Min-cheol ),한천구 ( Han Cheon-goo ) 한국건축시공학회 2017 한국건축시공학회 학술발표대회 논문집 Vol.17 No.2
This paper is to provide a method to prevent air loss of the concrete using reject ash based ternary blended aggregate due to absorption of AE agents by reject ash by adding AE agents into reject ash before mixing concrete. Test results indicate that air loss due to presence of reject ash in ternary blended aggregate can be recovered by over use of AE agents into aggregate directly before mixing.