| 摘要 |
PROBLEM TO BE SOLVED: To provide a solidified substance of a concrete, suitable for the use as a paving material of an urban area, and a water-retaining structural material, and further to provide a method for producing the solidified substance. SOLUTION: This solidified substance of a water-retaining concrete, having fine open cells communicating with the surface part of the solidified substance of the concrete is obtained by immersing a lightweight aggregate having fine open cells in an aqueous solution containing a plenty of carbon dioxide gas, taking out the aggregate from the aqueous solution, kneading the resultant aggregate with a cement and water, and solidifying the kneaded product. |
