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Setting Time Evaluation of High Flowable Ternary Concrete Mix Using Durometer

듀로미터를 이용한 3성분계 고유동 콘크리트의 응결시간 추정

  • Han, Min-Cheol (Department of Architectural Engineering, Cheongju University) ;
  • Lee, yuk-Ju (Department of Architectural Engineering, Cheongju University)
  • Received : 2019.12.02
  • Accepted : 2020.01.29
  • Published : 2020.03.30

Abstract

The aim of the research is to evaluate the feasibility of durometer for assessing setting time of the concrete by comparing it with the currently used proctor penetration test method to improve the surface finishing timing determining method generally determined based on the experience of the worker. As a research result, the correlation between suggesting method using durometer with currently used proctor penetration test method was high enough. Hence, on the surface of the concrete, the initial setting time and the final setting time could be designated as 41 HD with C-type, and 11 HD with D-type, respectively. Therefore, the durometer can be used as a portable setting time evaluation device with the easiness of handling and measuring for determining concrete surface finishing timing quantitatively.

본 연구는 콘크리트 타설 현장에서 숙력된 작업자의 경험과 감각에만 의존하던 표면 마감작업 시간을 듀로미터의 경도치로 추정이 가능한지 프록터 관입저항 시험치와 비교하여 분석하였다. 연구 결과로 듀로미터 경도치와 프록터 관입저항치는 상관성이 매우 높게 나타났다. 따라서 콘크리트 표면에서 듀로미터 측정값으로 초결 시간은 듀로미터 C 타입으로 41 HD전후 일 때, 종결 시간은 듀로미터 D 타입으로 11 HD전후 일 때로 밝혀졌다. 따라서 프록터 관입저항 시험기보다 듀로미터의 경우는 편리한 휴대성을 가지고 콘크리트의 표면 마감 작업시간을 정량적으로 관리할 수 있을 것으로 사료되었다.

Keywords

References

  1. Han, C.G. (2008). Remicon Quality Control 2, Kimoondang.
  2. Kato, J., Makishima, O. (2017). Proposal for effective construction management technique by setting management at concrete placement, Proceedings of Architecture Institute of Japan, 423-424.
  3. Korea Concrete Institue. (2010). Concrete Working-Manual, Concrete Curing, Kimoondang.
  4. Lee, H.J., Han, J.H., Kim, T.W., Lee, D.Y., Jang, D.B., Han, M.C. (2018). Substitutation of blast furnace slag using durometer determination of the surface closing time of high fluidity concreate, Journal of the Korea Concrete Institute, 30(1), 353-354 [in Korean]. https://doi.org/10.4334/JKCI.2018.30.4.353
  5. Shin, K.J., Lee, D.K., Seo, D.W., Yoo, C.M., Lim, M.H., Lim, S.H. (2016). Setting estimation of cement paste using new-type embedded sensor, Journal of the Korean Recycled Construction Resources Institute, 4(4), 483-488 [in Korean]. https://doi.org/10.14190/JRCR.2016.4.4.483
  6. Shin, Y.S., Han, M.C. (2019). Estimation of the setting time of the high flowing concrete using durometer, Journal of the Architectural Institute of Korea, 35(9), 143-151 [in Korean].