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US 11,981,608 B2Granted
Luminescent concrete product
AssigneeImam Abdulrahman Bin Faisal University
InventorsMuhammad Saleem, Nawaf Isam Ahmed Blaisi
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Abstract
Luminescent concrete compositions containing cement, fine aggregates such as sand, and a phosphor such as strontium aluminate. Glow-in-the-dark concrete products made therefrom and methods of producing such concrete products are also specified. The glow-in-the-dark concrete products demonstrate good mechanical strength (e.g. compressive strength) and skid resistance. The addition of phosphorescent strontium aluminate provides luminance that persists for up to 10 hours to the concrete products.
Claims11
A glow-in-the-dark concrete block, comprising:
- a surface layer comprising a cured luminescent concrete;
- and
- a base concrete block,
- wherein the cured luminescent concrete comprises:
- a cement;
- a fine aggregate comprising sand;
- and
- phosphorescent aluminate particles,
- wherein a weight ratio of the phosphorescent aluminate particles to the fine aggregate is in the range of 1:2 to 1:20;
- and
- wherein the cured luminescent concrete has an intensity of glow of 2-15 candelas per square meter for a period of 0.1-10 hours upon excitation with sun light for 2-20 minutes;
- and
- wherein at least a portion of a surface of the base concrete block is coated by the surface layer, and
- wherein the surface layer has a skid resistance value of 100-150.
11 more elements
Dependencies are inferred from the claim text.