Journal of the Architectural Institute of Korea Structure & Construction (대한건축학회논문집:구조계)

Architectural Institute of Korea (대한건축학회)
권호 표지
DOI QR코드

DOI QR Code

A Feasibility Analysis of Rapid Acquisition Test for Cement Fineness using Hydrometer

시멘트 인수검사 시 액체밀도계법에 의한 분말도 품질 신속평가 가능성 분석

  • 한천구 (청주대학교 건축공학과) ;
  • 김영태 (청주대학교 건축공학과)
  • Received : 2018.04.09
  • Accepted : 2018.06.18
  • Published : 2018.06.30
⟨ Previous Next ⟩

Abstract

In this research, regarding the cement supplied to ready mixed concrete plant, the feasibility of rapid acquisition test for cement fineness using hydrometer which used for early strength evaluation of concrete was analyzed. Additionally, regarding the rapid test with hydrometer control factors were provided. As a result of analysis, quality control using hydrometer was possible with the regressive equation obtained in five minute between density of suspension and fineness of cement powder. As the control factors, dispersing admixture, replacing kerosene as a medium, and temperature of cement and water were evaluated. According to the control factor evaluation, the tap water was optimum as a medium and calibration of keeping the temperature of water to $20^{\circ}C$ or correction factor was needed for density results. Finally, it is considered that the suggested rapid quality evaluation method using hydrometer is cheaper and easier method than currently used Blaine test.

Keywords

Acknowledgement

Supported by : 한국연구재단

References

  1. Wen, X., Kim, K., Jeon, C., Yoon, G., Yang, S., & Han, C. (2007). Mechanical Properties of Cement Mortar with the Fineness of Cement, Proceedings of the Architectural Institute of Korea, 23(2), 439-442.
  2. Korean Agency for Technology and Standards. (2016). KS F 4009 Ready-Mixed Concrete
  3. Han, C. (1988). Study on the Early Estimation of Concrete Strength, A doctoral dissertation at Chungnam National University
  4. Song, H., & Han, C. (2017) Analysis of Evaluation Possibility of Fly Ash Fineness Using Hydrometer, Journal of the Korea Institute of Building Construction, 17(2), 119-125 https://doi.org/10.5345/JKIBC.2017.17.2.119
  5. Moon, B., Baek, C., Lee, J., Kim, Y., Han, M., & Han, C. (2016). Quality Evaluation Possibility Analysis of Fineness OPC by hydromter, Proceedings of the Korea Concrete Institute, 28(2), 575-576.
  6. Lee, J., Kim, M., Lee, J., Kim, Y., Han, M., & Han, C. (2017). Influence of Cement Temperature Change in Fast Track Quality Evaluation of Cement using Liquid Densimeter, Proceedings of the Architectural Institute of Korea, 37(1), 769-770.
  7. Lee, J., Hyeon, S., Moon, B., Kim, Y., Han, M., & Han, C. (2017). The Effect of Solution Variables and Numbers of Cylinders Spinning in the Rapid Evaluation of Cement Powder by hydrometer Method, Proceedings of the Korea Concrete Institute, 27(2), 127-136.
  8. Lee, J., Kim, M., Moon, B., Kim, Y., Han, M., & Han, C. (2017). Influence of Various Powder of OPC Received in Concrete Plant on Strength Characteristics of Cured Mortar, Proceedings of the Korea institute of building construction, 17(1), 167-168. https://doi.org/10.5345/JKIBC.2017.17.2.167
  9. Lee, J., Kim, M., Moon, B., Kim, Y., Han, M., & Han, C. (2017). Influence of Various Powder of OPC Received in Concrete Plant on Strength Characteristics of Cured Mortar, Proceedings of the Korea institute of building construction, 17(1), 167-168. https://doi.org/10.5345/JKIBC.2017.17.2.167
  10. Lee, G., Kim, G., Byeon, J., Han, C., & Bhan, H. (1998). A Study on Properties of Concrete According to the Variation of Cement Temperature, Proceedings of the Architectural Institute of Korea, 18(1), 1025-1030.