FUNDAMENTAL STUDY ON CARBONATION OF BLENDED CEMENT CONTAINING METHILDIEHANOLAMINE

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  • KOBAYASHI Kazuki
    TAIHEIYO CEMENT CORPORAITON, Central Research Laboratory（2-4-2, Osaku, Sakura-shi, Chiba 285-8655, Japan）
  • OHGI Yoshifumi
    TAIHEIYO CEMENT CORPORAITON, Central Research Laboratory（2-4-2, Osaku, Sakura-shi, Chiba 285-8655, Japan）
  • HOSOKAWA Yoshifumi
    TAIHEIYO CEMENT CORPORAITON, Central Research Laboratory（2-4-2, Osaku, Sakura-shi, Chiba 285-8655, Japan）

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  • メチルジエタノールアミンを添加した混合セメントの中性化に関する基礎的検討

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<p>The effect of methyldiethanolamine（MDEA）on the suppression of carbonation of blast-furnace cement type B and limestone calcined clay cement was investigated. The results showed that the suppression of carbonation was observed in both blast-furnace cement type B and limestone calcined clay cement, and the effect was larger as the addition of MDEA increased. It was found that the addition of MDEA promoted the hydration of C4AF and decreased the pores larger than 150nm in diameter. Therefore, the suppression of carbonation was considered to be due to MDEA promoting cement hydration and changing the pore structure of the mortar.</p>

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