| 摘要 |
PROBLEM TO BE SOLVED: To provide an antifouling structure of a concrete product, capable of making fouling on the surface of the product inconspicuous even when the products are stacked and bundled for storage in the open air for a long time. SOLUTION: This antifouling structure is applied to the approximately plate- shaped concrete product 1 such as a ditch cover for a side ditch or lagging. The surface 12 of the product 1 undergoes molding integral with protrusions 15 forming a gap between the surfaces 12 of the adjacent products 1 when the products 1 are stacked for storage.
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