再生コンクリートの細骨材としてごみ溶融スラグを用いた梁部材の付着特性に関する実験的研究

概要

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The bond properties of recycled concrete beams using a melt-solidified slag as the fine aggregate of recycled concrete were studied. Medium-quality recycled coarse aggregate showed high water absorption caused by the mortar remaining in the original aggregate, and so the recycled concrete is likely to suffer drying shrinkage cracks. On the contrary, the melt-solidified slag has a glassy surface with weak hydrophilicity and shows low water absorption. We therefore adopted recycled concrete using melt-solidified slag as the fine aggregate of the recycled concrete to suppress the generation of drying shrinkage cracks. Compared with the case of not using the melt-solidified slag, the above-recycled concrete showed an equivalent value of bond splitting strength at lap splices with a substitution ratio of melt-solidified slag of 50% or less. Furthermore, the recycled concrete using melt-solidified slag suffered less drying shrinkage and drying shrinkage cracks.
一般社団法人日本建築学会の論文
2011-03-25