Journal of the Korea Institute of Building Construction (한국건축시공학회지)

The Korean Institute of Building Construction (한국건축시공학회)
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Effects of Sugar and Hydrated Cement Powder on the Reduction in Heat of Hydration

당분과 수화시멘트 분말이 수화열 저감에 미치는 효과

  • Moon, Hoon (Department of Architectural Engineering, Pukyong University) ;
  • Kim, Ji-Hyun (Department of Architectural Engineering, Pukyong University) ;
  • Cho, Yong-Hun (Department of Architectural Engineering, Pukyong University) ;
  • Lee, Jae-Yong (Department of Architectural Engineering, Pukyong University) ;
  • Chung, Chul-Woo (Department of Architectural Engineering, Pukyong University)
  • Received : 2013.10.14
  • Accepted : 2013.12.27
  • Published : 2014.04.20
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Abstract

The heat of hydration can be reduced through the use of retarding agents. Typical retarding agents include sugar and glucose. However, these significantly delay the setting of cement paste. For the efficient use of sugar and glucose for mass concrete construction, it is necessary to develop a technique that can provide a setting behavior equivalent to that of plain concrete. In this work, the temperature rise of cement paste was monitored with the addition of various retarders including sugar and glucose. Hydrated cement powder was made with a water to cement ratio of 5 in order to accelerate the retarded cement pastes. It was found that the addition of hydrated cement powder in retarded pastes reduced the maximum temperature of cement paste. The use of hydrated cement powder could also successfully reduce the time to reach the maximum temperature.

지연제는 수화열 저감에 이용될 수 있다. 대표적 지연제로는 설탕 및 포도당이 존재하는데, 이들은 응결시간의 지연효과가 너무 강해 조심하여 사용해야만 한다. 이러한 지연제의 효과적인 사용을 위해서는 지연효과를 상쇄시킬만한 기술의 개발이 필요하다. 본 연구에서는 촉진제로 물시멘트비 5의 수화시멘트 분말을 사용하였으며, 이를 지연제와 함께 사용하면 시멘트 페이스트의 최고 수화온도를 저감하면서 수화반응을 촉진할 수 있을 것으로 판단된다.

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References

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  1. The Reduction of Maximum Hydration Temperature in Cement Paste Using Calcium Silicate Hydrates and Glucose vol.27, pp.3, 2015, https://doi.org/10.4334/JKCI.2015.27.3.265
  2. Surface Properties of Exposed-Aggregate Concrete Depending on Retarder and Water Jet Washing Timing vol.15, pp.2, 2015, https://doi.org/10.5345/JKIBC.2015.15.2.169