[논문]Engineering Performance of a Rapid Hardening Hydraulic Binder with Hybrid Fiber

Li, Mao; Kim, Jin-Man; Choi, Sun-Mi

doi:10.5345/jkibc.2016.16.3.279

Abstract ▼ AI-Helper

The fundamental performance of any construction material should cover at least two phases: safety and serviceability. Safety commonly represents adequate strength, while serviceability encompasses the control of cracking and deflections at service loads. With respect to rapid hydraulic binders as a ...

The fundamental performance of any construction material should cover at least two phases: safety and serviceability. Safety commonly represents adequate strength, while serviceability encompasses the control of cracking and deflections at service loads. With respect to rapid hydraulic binders as a construction material, the above two phases should also be considered. Recent research on rapid cooling ladle furnace slag (RC-LFS) has drawn much attention, particularly given that it shows remarkable rapid hydraulic ability to pulverize to a fineness of $6,300cm^2/g$. This industrial byproduct could contribute to developing the sustainability of the rapidly hardening cementitious material system. This paper aims to expand upon the applicability of an RC-LFS-based binder that is composed of two parts. It also seeks to illustrate the engineering performance of an RC-LFS-based hybrid fiber-reinforced composite and to increase the strength of the RC-LFS-based composite. Each step of this experiment followed ASTM standards. The engineering performance, in both fresh state and hardening state, was tested and discussed in this paper. According to the experimental results for fresh concrete, the air content increased following the addition of polypropylene fiber. For hardened concrete, the toughness and strength improved following the addition of a hybrid fiber. The hybrid fiber mixture, which contains 0.75% of steel fiber and 0.25% of polypropylene fiber, shows even better engineering performance than other mixtures.

주제어

AI 본문요약
AI-Helper

* AI 자동 식별 결과로 적합하지 않은 문장이 있을 수 있으니, 이용에 유의하시기 바랍니다.

문제 정의

Therefore, the fundamental purpose of this research is to study the engineering performance, including compressive strength, flexural strength, and strain–stress behaviors, of a hybrid fiber-reinforced composite with pulverized RC-LFS.

가설 설정

1) Pulverized RC-LFS can hydraulic independently and rapid setting and hardening. Its early strength performance is also remarkable.

제안 방법

For fresh concrete, the flow, air content, and unit weight were measured. For hardening concrete, the engineering performance (including compressive and flexural strength) was tested and recorded at 4 hours, 1 day, 7 days, and 28 days after being cast. Additional performance measures such as stress–strain behavior and length change were also detailed in this paper.
There were two kinds of molds used during the experiment: one was 100×100×400mm for the stress–strain curve test, while the other was 40×40×160mm to assess flexural strength, compressive strength, and length change.
To evaluate the properties of hybrid fiberreinforced, LFS-based mortar, its compressive strength, flexural strength, volume stability (as estimated by the length change ratio), and toughness (as estimated by the strain–stress curve) were measured.

대상 데이터

7% chemical retarder by binder mass was used; it was dissolved in water in advance. The chemical retarder used in this experiment was citric acid, which was provided from the Korean market. Since the additional fibers would influence the workability of fresh concrete, in order to reach the target flow, a superplasticizer was also involved.
Since evaporation may occur at room temperature, the sand has to be tested again for SSD conditions just before the experiment starts. The fibers involved in this experiment were 12mm PPF and 30mm hooked-end SF. The fiber conditions are illustrated in Figure 3.
The materials used in this experiment are pulverized RC-LFS, gypsum, river sand, PPF, SF, superplasticizer, and a retarder. The binder used in this experiment was combined with pulverized RC-LFS powder and replaced by 25% gypsum (see Figure 2).

성능/효과

2) A high amount of PPF can increase the air content of fresh concrete; thus, it can lead to a decrease in the concrete’s compressive and flexural strength.
3) A hybrid fiber containing both SF and PPF may increase the concrete’s flexural strength, while the hybrid fiber system can modify the stress– strain behavior.
SF provided good bonding strength, while PPF increased the matrix’s toughness, so the mixture was more stable than the mono-fiber-reinforced composite or plain concrete. Based on the test results of this experiment, the hybrid fiber featuring 0.25% of PPF and 0.75% of SF per 1 cubic meter of concrete showed the best result out of the five mixtures.

참고문헌 (8)

Torgal FP, Jalali S, Labrincha J, John VM. Eco-efficient concrete. 1st edition. UK: Woodhead Publishing Limited; 2013. 595 p.
Choi SM, Kim JH, Kim JM. Consideration on the Applicability of Ladle Furnace Slag as Construction Materials. Journal of the Korean Recycled Construction Resource Institute. 2011;11(1):9-11.
Choi SM, Kim JM, Han DY, Kim JH. Hydration Properties of ladle furnace slag powder rapidly cooled by air. Construction and Building Materials. 2016 Jun;113:682-90.

상세보기
Setien J, Hernandez D, Gonzalez JJ, Characterization of ladle furnace basic slag for use as a construction material, Construction and Building Materials. 2009 May;23(5):1788-94.

상세보기
Laure PC, Frank W, Barbara L, Christian JM. Beneficial use of limestone filler with calcium sulphoaluminate cement. Construction and Building Materials. 2012 Jan;26(1):619-27.

상세보기
Sidney M, Young JF, Darwin D. Concrete. 2nd edition. USA: Pearson Education Inc; 2003. 95 p.
Qian CX, Stroeven P. Development of hybrid polypropylene-steel fibre-reinforced concrete. Cement and Concrete Research. 2000 Jan;30(1):63-9.

상세보기
Bentur A, Mindess S, Vondran G. Bonding in polypropylene fibre reinforced concretes. International Journal of Cement Composites and Lightweight Concrete. 1989 Aug;11(3):153-8

상세보기

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 논문명, 저널/프로시딩명, 저자 , 발행년, 권, 호, 시작페이지, 끝페이지, 발행기관 관리번호, 논문명, 대등논문명, 저자 , 저널/프로시딩명, 발행기관, 발행년, 발행언어, 권, 호, 시작페이지, 끝페이지, ISBN, ISSN, 주제분야, 키워드, 초록(한글), 초록(영문), 저자(소속기관)
저장형식	Text(ASCII format) Excel format RefWorks Direct Export RIS format (for Reference Manager, ProCite, EndNote), Scholar's Aids, Mendeley
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

연합인증

Engineering Performance of a Rapid Hardening Hydraulic Binder with Hybrid Fiber 원문보기

Abstract ▼ AI-Helper

주제어

AI 본문요약
AI-Helper

문제 정의

가설 설정

제안 방법

대상 데이터

성능/효과

참고문헌 (8)

이 논문을 인용한 문헌

저자의 다른 논문 :

관련 콘텐츠

원문 보기

원문 URL 링크

오픈액세스(OA) 유형

이 논문과 함께 이용한 콘텐츠

AI-Helper ※ AI-Helper는 오픈소스 모델을 사용합니다.

선택된 텍스트

연합인증

Engineering Performance of a Rapid Hardening Hydraulic Binder with Hybrid Fiber 원문보기

Abstract ▼ AI-Helper

주제어

AI 본문요약 엑셀 다운로드 AI-Helper

문제 정의

가설 설정

제안 방법

대상 데이터

성능/효과

참고문헌 (8)

이 논문을 인용한 문헌

저자의 다른 논문 :

김진만 (96)

관련 콘텐츠

원문 보기

원문 URL 링크

오픈액세스(OA) 유형

이 논문과 함께 이용한 콘텐츠

AI-Helper ※ AI-Helper는 오픈소스 모델을 사용합니다.

선택된 텍스트

AI 본문요약
AI-Helper