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US 11,999,655 B2Granted
Building materials comprising carbon-dioxide-treated agglomerated particles
AssigneeSpecialty Granules Investments LLC
InventorPeter M. Wilson
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Abstract
Roofing granules comprising agglomerated inorganic material treated with carbon dioxide gas, and building materials, such as shingles, that include such roofing granules. By fabricating roofing granules from agglomerating inorganic material it is possible to tailor the particle size distribution so as to provide optimal shingle surface coverage, thus reducing shingle weight and usage of raw materials. Additionally, the use of agglomeration permits the utilization of by-products from conventional granule production processes.
Claims19
A method comprising:
- obtaining (a) a plurality of fragments, the plurality of fragments comprising at least one of metabasalt, andesite, rhyolite, or a combination thereof and (b) a binder;
- mixing (a) the plurality of fragments and (b) the binder to produce an agglomerated particle that is formed by agglomerating together the plurality of fragments and the binder;
- drying the agglomerated particle to obtain a dried agglomerated particle having a first solubility;
- and
- treating the dried agglomerated particle with carbon dioxide gas to obtain a carbon-dioxide-gas-treated dried agglomerated particle having a second solubility,
- wherein the treating the dried agglomerated particle with carbon dioxide gas uses conditions sufficient to achieve a reduction in solubility from the first solubility to the second solubility of at least 95%.
3 more elements
Dependencies are inferred from the claim text.