http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
배합요인이 자기충전 콘크리트의 워커빌리티 및 레올로지 파라미터에 미치는 영향 분석
윤섭,한민철,Yoon, Seob,Han, Min-Cheol 한국건축시공학회 2018 한국건축시공학회지 Vol.18 No.3
본 연구에서는 SCC의 높은 민감성으로 인한 품질관리에 어려움을 극복하고자 굵은 골재의 부피, 잔골재의 종류, 단위수량, 공기량, 증점제 사용량 변화 등과 같은 다양한 배합요인이 SCC 특성에 미치는 영향을 분석하여 SCC의 초기물성을 정량적으로 판단할 수 있는 기초자료를 제공하고자 하였다. 실험결과, 항복응력은 굵은 골재 용적율이 증가할수록 낮아졌고 증점제 사용량이 증가할수록 증가하는 것으로 나타났다. 그러나 단위수량, 잔골재 종류 변화, 공기량 증감에 따른 항복응력값의 변화는 없는 것으로 나타났다. 배합요인에 따른 소성 점도는 항복응력과 비슷한 경향을 나타냈다. 또한 항복응력과 슬럼프 플로, $T_{50}$, V-lot와의 상관성 분석결과, 상관관계가 없었고 소성 점도와 $T_{50}$, V-lot와의 상관성은 매우 밀접한 관계가 있는 것으로 나타났는데, 특히, $T_{50}$ 및 V-lot 시간이 줄어들수록 소성 점도도 낮아지는 것을 알 수 있었다. The objective of the paper is to investigate the effect of mix designing factors on the workability and rheological parameters of self compacting concrete in order to facilitate the difficulties of quality control of high sensitivity of SCC. Mix proportions of SCC were prepared with various conditions of coarse, and fine aggregate, and unit water content, and the SCC mixtures were tested on workability, rheological properties to provide basic data for quantitative evaluation. Test results indicated that the yield stress of SCC decreased with increasing the coarse aggregate volume ratio, and increased with increasing the amount of VMA. However, unit water content, fine aggregate type, and air content didn't affect the yield stress value. The plastic viscosity according to the mixing factors showed a similar tendency to the yield stress. In addition, there was no correlation between yield stress and workability (flow, T50, V-lot). However, there was closely correlation among plastic viscosity and T50 and V-lot. Especially, T50 and V-lot time decreased with decreasing plastic viscosity.
윤섭(Yoon Seob),송승헌(Song Seung Hean),한민철(Han Min Cheol),김경환(Kim Gyeong Hwan),정용희(Jong Young Hee),한천구(Han Chean-Goo) 한국구조물진단유지관리학회 2005 한국구조물진단학회 학술발표회논문집 Vol.- No.-
This study reported mock-up test on investigation of reducing shrinkage concrete. Test results show that concrete incorporating expansive additive(EA). shrinkage reducing agent(SRA) and flowing method(FM) was not affected fluidity, bleeding, setting time and compressive strength. For the properties of drying shrinkage, Number 'one' position of specimen, which is small area, exhibited high drying shrinkage, while specimen 'D' incorporating EA, SRA, and FM at the same time, presented favorable effect, which reduce 30 to 40% of drying shrinkage, compared with plain concrete.
윤섭 ( Yoon Seob ),송승헌 ( Song Seung Heon ),한민철 ( Han Min Cheol ),김경환 ( Kim Gyeong Hwan ),정용희 ( Jong Young Hee ),한천구 ( Han Cheon-goo ) 한국구조물진단유지관리공학회 2005 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.9 No.1
This study reported mock-up test on investigation of reducing shrinkage concrete. Test results show that concrete incorporating expansive additive(EA), shrinkage reducing agent(SRA) and flowing method(FM) was not affected fluidity, bleeding, setting time and compressive strength. For the properties of drying shrinkage, Number ’one’ position of specimen, which is small area, exhibited high drying shrinkage, while specimen ’D’ incorporating EA, SRA, and FM at the same time, presented favorable effect, which reduce 30 to 40 % of drying shrinkage, compared with plain concrete.