再生コンクリートの乾燥収縮と水分逸散の機構に関する研究

概要

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In this study, the mechanism of drying shrinkage and water loss of concrete with inferior quality recycled coarse aggregates was discussed from the view point of composite theory. The results are summarized as follows : (1) The drying shrinkage of recycled aggregate concrete increases because of the recycled aggregates with low Young's modulus and large drying shrinkage, and this phenomenon is theoretically explained with a composite model for drying shrinkage. (2) In case of natural aggregate concrete, the most of water loss is from cement paste. On the other hand, in case of recycled aggregate concrete, recycled aggregates also lose water. (3) Although the recycled aggregates lose much water at the early stage of drying, the contribution of the lost water to drying shrinkage is small. After that the water loss from the recycled aggregate pores contributes to drying shrinkage.
社団法人日本建築学会の論文
2003-11-30