| 摘要 |
PROBLEM TO BE SOLVED: To provide porous concrete which enables to enlarge the surface area of a titanium dioxide catalytic layer, and which has high performances to decompose harmful gases, absorb noise and clean itself and is used in various applications. SOLUTION: In the porous concrete 5 in which pores 4 are formed by mixing a cement paste and an aggregate and kneading the resulting mixing into a stiff paste, titanium dioxide is sprayed on the porous concrete before the porous concrete 5 hardens so as to form the catalytic layer 2 on the surface of the porous concrete.
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