CLINKER-FREE CONCRETE WITH DEHYDRATED SLUDGE POWDER AND BY-PRODUCED MINERAL ADMIXTURE

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  • OHKAWA Ken
    Manager, Testing Department, Sanwasekisan Corporation.
  • AOKI Shinichi
    General Manager, R&D Department, Sanwasekisan Corporation.
  • MOMOSE Haruki
    Senior Research Engineer, Kajima Tech. Research Institute, Dr. Eng.
  • KANDA Tetsushi
    General Manager, Kajima Tech. Research Institute, Ph. D.
  • KASAI Tetsurou
    Prof., Dept. of Civil Engineering, Tokai University, Dr. Eng.

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  • 乾燥スラッジ微粉末と産業副産物混和材を併用したクリンカーフリーコンクリートに関する実験研究
  • カンソウ スラッジ ビフンマツ ト サンギョウ フクサンブツ コンワザイ オ ヘイヨウ シタ クリンカーフリーコンクリート ニ カンスル ジッケン ケンキュウ

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Abstract

 Aiming at reducing environmental burden, reused of returned concrete and use of alternative cement for a low carbon dioxide emission were studied. Waste sludge of returned concrete and those produced when scrubbing agitator trucks were died and pulverized, and the basic properties of the dehydrated sludge powder were investigated. As a binder with alkali stimulation capability, it was introduced to by-produced mineral admixture including blast furnace slag and fly ash and mortar specimens were evaluated through experiments. As a result, combined use of the dehydrated sludge powder and the by-produced mineral admixture showed comparable long-term strength and carbonation resistance with those using the ordinary portland cement, while larger dosage of superplasticizer was needed to have equal fresh properties.

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