Proceedings of the Korea Concrete Institute Conference (한국콘크리트학회:학술대회논문집)

Korea Concrete Institute (한국콘크리트학회)
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Preparation of Concrete Admixtures from Pine Bark Wasts(II) -Conversion of Spent Liquor Obtained from Alkaline Sulfite- Anthraquinone(ASAQ) Cooking of Pine Bark Waste to Normal and Accelerating Concrete Admixtures-

폐 소나무 수피로부터 콘크리트 혼화제의 제조(II) - 소나무 수피 ASAQ증해 폐액의 표준형 및 촉진형 콘크리트 혼화제로의 전환 -

  • 박성천 (전북대학교 임산공학과 대학원생) ;
  • 문성필 (전북대학교 임산공학과 부교수(농업과학기술연구소)) ;
  • 문소현 (전북대학교 건축공학과 대학원생) ;
  • 소양섭 (전북대학교 건축공학과)
  • Published : 1998.04.01
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Abstract

The application of spent liquor(BSL) obtained from alkaline sulfite-anthraquinone cooking of pine bark to cement mortar significantly improved the water-reducing ability and decreased the rate of cement hardening. However, the compressive and flexural strength of BSL addition to cement mortar were lower than that of PLAIN. The application of 0.2% antifoamer to BSL slightly decreased water-reducing ability, but remarkably improved the compressive and flexural strength of cement mortar. On the other hand, BSL decreased the rate of hardening of cement, which exhibited the protperties of the lignosulfonated based retarding water-reducing type. but the setting time of cement could be controlled by addition of Na2CO3 could be used to convert BSL to normal or accelerating concrete admixtures.

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