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US 5,861,205 AGranted
NO.sub.x -cleaning paving block
AssigneeMitsubishi Materials Corporation
InventorsYoshihiko Murata, Hiroshi Obata, Hideo Tawara, Kozo Murata
Life of this patent
Estimating the term…
Abstract
An NO.sub.x -cleaning paving block comprising a surface layer which contains titanium dioxide and which is layered on a concrete-made base layer.
Claims13
An NO.sub.x -cleaning paving block, comprising:
- a surface layer comprising 100 parts by weight of cement, 5-50 parts by weight of titanium dioxide powder and 100-700 parts by weight of sand which of said which is layered on a concrete-made base layer, said surface layer having a void volume of 10-40% and a water permeability of at least 0.01 cm/sec, said block promoting the photodecomposition of NO.sub.x sorbed by said surface layer.
Dependencies are inferred from the claim text.