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US 11,661,381 B2Granted
Luminescent concrete slurry
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 luminescent concrete slurry, comprising:
- a luminescent concrete composition;
- and
- 10-25 wt % water relative to a total weight of the luminescent concrete slurry;
- wherein the luminescent concrete composition consists essentially of:
- a hydraulic cement;
- a fine aggregate comprising sand;
- and
- phosphorescent strontium aluminate particles having an average particle size of 2-6 μm;
- wherein a weight ratio of the phosphorescent strontium aluminate particles to the fine aggregate is in the range of 10-20:90-80;
- wherein the luminescent concrete slurry is devoid of a superplasticizer;
- and
- wherein the luminescent concrete slurry has an intensity of glow of from 4 to 8 cd/m2 for more than 200 minutes in cured form.
9 more elements
Dependencies are inferred from the claim text.