http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Okan Karahan (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Effects of Milled Cut Steel Fibers on the Properties of Concrete
Okan Karahan,Erdogan Ozbay,Cengiz D. Atis,Mohamed Lachemi,Khandaker M. A. Hossain 대한토목학회 2016 KSCE JOURNAL OF CIVIL ENGINEERING Vol.20 No.7
This study presents the mechanical and transport properties of milled cut steel fiber reinforced concretes (MCSFRC). Properties studied include unit weight, workability, compressive strength, flexural strength, splitting tensile strength, bond strength, water absorption, water porosity, water sorptivity, rapid chloride ion permeability and drying shrinkage of concrete. Mixtures with a waterbinder ratio of 0.40, total binder content of 500 kg/m3 and milled cut steel fiber content of 0, 0.25, 0.50 and 1.00% by concrete volume were produced and tested. The laboratory results showed a slight reduction in compressive strength with the use of milled cut steel fiber. On the other hand milled cut steel fibers significantly improved the tensile strength and decreased the drying shrinkage. Although no significant increase was observed in the absorption, porosity and sorptivity, chloride ion permeability increased drastically with the increase of milled cut steel fiber content.
-
Cahit Bilim,Okan Karahan,Duran Ati,Serhan lkentapar 대한토목학회 2015 KSCE JOURNAL OF CIVIL ENGINEERING Vol.19 No.3
This paper reports the results of an investigation on the influences of admixtures and curing conditions on some properties ofAlkali-Activated Slag (AAS) mixtures with no cement. In the study, Shrinkage-Reducing (SRA) and superplasticizing and setretarding(WRRe) admixtures were used. For the slag activation, sodium metasilicate was used at two sodium concentrations, 4%and 6% by mass of slag. Setting time, flow loss of fresh mixtures, and shrinkage strain, carbonation, flexural and compressivestrength of hardened mixtures were measured. The test results showed that the admixtures generally had no impact on the settingtimes of AAS pastes. WRRe increased the flow rate of AAS mortars while SRA partially affected the flow values of AAS mortars. This paper reports the results of an investigation on the influences of admixtures and curing conditions on some properties ofAlkali-Activated Slag (AAS) mixtures with no cement. In the study, Shrinkage-Reducing (SRA) and superplasticizing and setretarding(WRRe) admixtures were used. For the slag activation, sodium metasilicate was used at two sodium concentrations, 4%and 6% by mass of slag. Setting time, flow loss of fresh mixtures, and shrinkage strain, carbonation, flexural and compressivestrength of hardened mixtures were measured. The test results showed that the admixtures generally had no impact on the settingtimes of AAS pastes. WRRe increased the flow rate of AAS mortars while SRA partially affected the flow values of AAS mortars. WRRe and SRA did not produce an important difference on the carbonation depths of AAS mortars. However, WRRe and especiallySRA admixtures decreased the shrinkage values of AAS mortars. Additionally, curing conditions had a significant effect on themechanical behavior in the hardened state of AAS mortars compared to Normal Portland Cement (NPC) mortars, and the strengthdevelopment of AAS mortars at early ages was very fast in comparison with NPC mortars when subjected to elevated temperature.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
