한국건축시공학회지 (Journal of the Korea Institute of Building Construction)

  • 제23권6호
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  • Pages.673-682
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  • 2023
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  • 1598-2033(pISSN)
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  • 2233-5706(eISSN)
한국건축시공학회 (The Korean Institute of Building Construction)
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세티메타를 이용한 초지연 모르타르의 응결시간 추정

Estimation of Setting Time of Super Retarding Mortar Using Settimeter

  • Jeong, Yeong-Jin (Dept. of Architectural Engineering, Cheong-ju University) ;
  • Hyun, Seung-Yong (Construction Certification Center, Korea Institute of Civil Engineering and Building Technology) ;
  • Han, Jun-Hui (Dept. of Architectural Engineering, Cheong-ju University) ;
  • Kim, Jong (Dept. of Architectural Engineering, Cheong-ju University) ;
  • Han, Min-Cheol (Department of Architectural Engineering, Cheong ju University)
  • 투고 : 2023.10.05
  • 심사 : 2023.11.04
  • 발행 : 2023.12.20
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초록

본 연구에서는 모르타르 조건하에서 초지연제 혼입률, 양생온도 및 강도수준 변화에 따른 응결지연 특성을 고찰하고자 하였으며, 세티메타를 이용하여 공사현장의 다양한 외기조건 및 재료배합 조건하에서 초지연제를 사용한 콘크리트의 응결시간을 효율적으로 추정할 수 있는 객관적 방법을 제시하고자 하였다. 그 결과, 비선형 회귀모델의 추정식 및 세티메타을 이용하여 초지연 모르타르의 응결시간을 추정할 수 있을 것으로 사료되며, 초결은 45 ST, 종결은 80 ST 전후로 관리하는 것이 바람직할 것으로 판단된다. 또한, 이를 통해 초지연 콘크리트의 응결시관과 관련한 효율적인 품질관리가 가능할 것으로 사료된다.

This study investigates the delay in setting characteristics of mortar influenced by variations in super retarding agent(SRA) content, curing temperature, and strength levels. Utilizing a settimeter, the research introduces an objective approach to accurately determine the setting time of concrete with SRA under diverse environmental and material mixing conditions at construction sites. The findings indicate that the settimeter, in conjunction with a nonlinear regression model, can effectively estimate the setting time of super retarding mortar. Optimal management of the initial setting is recommended at approximately 45ST and the final setting around 80ST. This methodology enables more effective quality control in the setting times of super retarding concrete.

키워드

과제정보

This paper was conducted with the support of the National Research Foundation of Korea's Individual Basic Research Program(Mid-Career Research)(Project Number: NRF-2021R1A2C2011273) in 2021.

참고문헌

  1. Han CG, Han MC, Yoon CH, Sim BK. Setting and mechanical properties of concrete using saccharic type super retarding agent. Journal of the Korea Concrete Institute. 2002 Aug;14(4):589-96. https://doi.org/10.4334/JKCI.2002.14.4.589 
  2. Han CG, Han MC, Yoon CH, Sim BK. Setting and compressive strength properties of cement mortar using super retarding agent. Journal of the Architectural Institute of Korea Structure & Construction. 2001 Oct;17(10):87-94 
  3. Jeon, CK, Kim J, Shin DA, Yoon GW, Oh SG, Han CG. Field Application of Setting Time Difference Method Using SRA for Reduction of Hydration Heat of Mass Concrete. Proceedings of the Korean Institute of Building Construction Conference; 2005 May 21; Seoul, Korea. Seoul (Korea): the Korean Institute of Building Construction; 2005. p. 21-4. 
  4. ASTM C403/C403M-16. Standard Test Method for Time of Setting of Concrete Mixtures by Penetration Resistance. PA: American Society for Testing and Materials; 2023. 7 p. 
  5. Han MC, Shin YS, Han ID. Estimation of the setting time of the high flowing concrete using durometer. Journal of the architectural institute of korea structure. 2019 Sept; 35(9):143-50. https://doi.org/10.5659/JAIK_SC.2019.35.9.143 
  6. Han MC, Han ID, Shin YS. Estimation of setting time of concrete using rubber hardness meter. Journal of the Korean Recycled Construction Resources Institute. 2019 Dec;7(4):358-66. https://doi.org/10.14190/JRCR.2019.7.4.358 
  7. Han MC, Lee HJ. Setting time evaluation of high flowable ternary concrete mix using durometer. Journal of the Korean Recycled Construction Resources Institute. 2020 Mar;8(1):33-8. https://doi.org/10.14190/JRCR.2020.8.1.33 
  8. Han CG, Han MC, Shin YS. Feasibility study of modified durometer to evaluate setting time of the concrete. Journal of the Korea Institute of Building Construction. 2020 Oct;20(5):433-40. https://doi.org/10.5345/JKIBC.2020.20.5.433 
  9. Yoon CH. Study on the effective application of concrete using super retarding admixture [dissertation]. [Cheongju (Korea)]: University of Cheongju; 2003. 162 p. 
  10. KCS 14 20 40. Cold weather concrete. Goyang (Korea): Korea Construction Standards Center; 2022. 8 p. 
  11. KCS 14 20 10. Normal concrete. goyang (Korea):Korea Construction Standards Center; 2022. 65 p. 
  12. KCS 14 20 41. Hot weather concrete. Goyang (Korea):Korea Construction Standards Center; 2021. 4 p. 
  13. ASTM D2240-15. Standard test method for rubber property-durometer hardness. PA: American Society for Testing and Materials; 2021. 15 p. https://doi.org/10.1520/D2240-15R21. 
  14. Han MC, Han CG. Prediction of setting time of concrete using super retarding agent with maturity method. Journal of the Architectural Institute of Korea Structure & Construction. 2005 May;21(5):105-12. 
  15. Han MC. Prediction of setting time of concrete using fly ash and super retarding agent. Journal of the Korea Concrete Institute. 2006 Dec;18(6):759-67. https://doi.org/10.4334/jkci.2006.18.6.759 
  16. Schindler AK. Effect of temperature on hydration of cementitious materials. Materials Journal. 2004 Jan;101(1):72-81. https://doi.org/10.14359/12990 
  17. Juenger MCG, Jennings HM. New insights into the effects of sugar on the hydration and microstructure of cement pastes. Cement and Concrete Research. 2002 Mar;32(3):393-9. https://doi.org/10.1016/S0008-8846(01)00689-5