Sand treatment method and system for concrete applications
AssigneeKing Abdullah University of Science and Technology
InventorsAnastasiya Bavykina, Juan Manuel Colom, Jorge Gascon, William McDonough
Life of this patent
Estimating the term…
Abstract
A sand aggregate includes plural aggregate grains, wherein at least one aggregate grain of the plural aggregate grains includes, desert sand grains that are too small to be used in concrete applications, carbonate particles distributed on an external surface of the desert sand grains, and a sand-based glue that aggregates the desert sand grains together. The at least one aggregate grain has a size comparable to river sand grains, while the desert sand grains have a size smaller than the river sand grains so that the at least one aggregate grain is suitable for concrete applications.
Claims24
A sand aggregate comprising:
- plural aggregate grains,
- wherein at least one aggregate grain of the plural aggregate grains includes,
- desert sand grains that are too small to be used in concrete applications;
- carbonate particles distributed on and attached to an external surface of the desert sand grains;
- and
- a sand-based glue that aggregates the desert sand grains having the carbonate particles, to form the at least one aggregate grain,
- wherein the at least one aggregate grain has a size comparable to river sand grains, while the desert sand grains have a size smaller than the river sand grains so that the at least one aggregate grain is suitable for concrete applications;
- and wherein the sand-based glue is obtained from additional desert sand grains treated with a base.
A method for transforming desert sand grains into conforming sand for concrete applications, the method comprising:
- providing the desert sand grains;
- treating the desert sand grains with a carbon dioxide capturing agent to produce enhanced sand grains;
- carbonating the enhanced sand grains to generate carbonate enhanced sand grains and simultaneously storing carbon dioxide on the exterior surface of the carbonate enhanced sand grains, wherein the carbonate enhanced sand grains include carbonate particles attached to an external surface of the desert sand grains;
- and
- aggregating the carbonate enhanced sand grains with a sand-based glue to form a sand aggregate, which is a conforming sand for concrete applications and has similar sizes as river sand grains, wherein the sand-based glue is obtained from fine desert sand grains treated with a base.
Dependencies are inferred from the claim text.