Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Analysis of Characteristics of Slurry and Thermal Insulation Materials Using Hauyne Cement

  • Kim, Tae Yeon (Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology) ;
  • Jo, Ki Sic (Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology) ;
  • Chu, Yong Sik (Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology)
  • Received : 2019.07.03
  • Accepted : 2019.09.05
  • Published : 2019.09.30
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Abstract

This study focused on manufacturing an inorganic insulation material set with various amounts of calcium-sulfoaluminate (CSA) (hauyne) content for enhancing both workability (demolding, handling) and the high thermal insulating property. To carry out the experiment, the amounts of CSA utilized were 5%, 10%, 15%, and 20%, with anhydrous gypsum added in equal proportion to produce a stable formation. As the content of CSA increased, a sinking phenomenon occurred because of the hydration reaction from the slurry, so it was difficult to utilize a retarder normally used in the cement manufacturing process. However, an RCOOM surfactant was able to solve the local clumping problem from cement and CSA and obtain a rapid retarding effect, so it was included in this process at 0.3%. Furthermore, the cement fineness was not 7000 ㎠/g but rather 3300 ~ 4000 ㎠/g to prevent a rapid temperature increase in the slurry. The specific gravity of the sample manufactured with 20% CSA was approximately 0.11 g/㎤, and its thermal conductivity was 0.041 W/m·K, providing an excellent insulating property.

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References

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