COMPARISON OF DRY SHRINKAGE REDUCTION OF UREA MORTAR BY DIFFERENT PRODUCTION METHODS

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  • SUZUKI Mariko
    KOBE UNIVERSITY, Graduate School of Agriculture Science（1-1, Rokkodai-cho, Nada-ku, Kobe-shi, Hyogo 657-8501, Japan）
  • NAMBU Shin
    KOBE UNIVERSITY, Graduate School of Agriculture Science（1-1, Rokkodai-cho, Nada-ku, Kobe-shi, Hyogo 657-8501, Japan）
  • KOIDE Kento
    KOBE UNIVERSITY, Graduate School of Agriculture Science（1-1, Rokkodai-cho, Nada-ku, Kobe-shi, Hyogo 657-8501, Japan）
  • MATSUKA Takeju
    NATIONAL INSTITUTE OF TECHNOLOGY, KUMAMOTO COLLEGE, Department of Architecture and Civil Engineering（2627 Hirayama-shinmachi, Yatsushiro-shi, Kumamoto 866-8501, Japan）

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Other Title
  • 作製方法の異なる尿素モルタルの乾燥収縮低減効果の比較

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<p>In this study, the production method of urea-containing mortar that is effective in reducing the drying shrinkage was investigated from the length change rate measurement. The preparation of urea-containing mortar was the three methods；the first one was used urea solution as the mixing water, the second one was used urea solution as the curing water and the third one was used fine aggregate soaked in urea solution. As a result, the most effective method for reducing the dry shrinkage of mortar was to change the curing water to urea solution. Furthermore, in this paper, the advantages and problems of each urea-containing mortar are summarized.</p>

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