US 2024/0417326 A1 · Carbon-Absorbing Algae Concrete and Method of Production

Abstract

A carbon-sequestering geopolymer concrete composition and method of manufacture is disclosed. The composition comprises a geopolymeric binder phase of aluminosilicate materials and an alkaline activator, coarse and fine aggregates, dried marine algae powder, and optional supplementary cementitious materials. This enables significantly reduced carbon dioxide emissions during production compared to standard concrete mixes. Additionally, the integrated algae powder facilitates direct capture and mineralization of atmospheric carbon dioxide as the concrete cures. Aspects of embodiments of the invention include the concrete composition; a sidewalk embodiment comprising said concrete; associated sidewalk construction methods; and alternate sidewalk embodiment claims. Compared to conventional concretes, the technology disclosed herein provides over 70% lower CO2 emissions coupled with enhanced carbon mineralization that progresses over the material lifetime. This enables various infrastructure applications to reach carbon-absorbing or carbon-negative performance credentials. The composition also exhibits excellent mechanical strength, freeze-thaw resilience, and extended durability properties.

Claims15

Dependent claims

A carbon-negative concrete composition comprising:

7-13% Class F fly ash;
5-10% ground granulated blast furnace slag (GGBFS);
1-4% metakaolin;
35-45% recycled coarse aggregates;
35-45% natural fine aggregates;
1-4% sodium hydroxide solution;
1-4% sodium silicate solution;
0.3-3% of algae biomass,
0.3-3% of at least one or more of the group consisting of calcium carbonate and magnesium carbonate;
0.2-2.5% of at least one or more of the group consisting of olivine, basalt rock dust, biochar, and alginate beads;
3-20% water;
wherein the composition is configured to reduce CO2 inputs by approximately 80-130 tons and capture an additional 150-250 tons of CO2 per 1,000 tons of concrete produced.

9 more elements

Dependencies are inferred from the claim text.

Carbon-Absorbing Algae Concrete and Method of Production

Life of this patent

Carbon-Absorbing Algae Concrete and Method of Production

Life of this patent

Abstract

Claims15