Methods and compositions using calcium carbonate
Provided herein are compositions and methods including hydraulic cement, supplementary cementitious material, and/or self-cementing material. Methods for making the compositions and using the compositions are provided.
1. A composition, comprising a non-naturally occurring supplementary cementitious material (SCM), the SCM comprising at least 47% w/w vaterite, wherein the composition upon combination with water, setting, and hardening, has a compressive strength of at least 14 MPa and wherein the composition comprises a carbon isotopic fractionation value (δ 13 C) of between −12‰ to −25‰.
2. A composition, comprising a non-naturally occurring SCM, the SCM comprising at least 10% w/w vaterite and at least 1% w/w amorphous calcium carbonate (ACC), wherein the composition upon combination with water, setting, and hardening has a compressive strength of at least 14 MPa and wherein the composition comprises a carbon isotopic fractionation value (δ 13 C) of between −12‰ to −25‰.
3. The composition of claim 1 , wherein the composition has a compressive strength in a range of 20-40 MPa.
4. The composition of claim 1 , wherein the vaterite is in a range of 47% w/w to 99% w/w.
5. The composition of claim 2 , wherein the composition comprises ACC in a range of 1% w/w to 53% w/w.
6. The composition of claim 1 , further comprising a polymorph selected from the group consisting of amorphous calcium carbonate, aragonite, calcite, ikaite, a precursor phase of vaterite, a precursor phase of aragonite, an intermediary phase that is less stable than calcite, polymorphic forms in between these polymorphs, and combination thereof.
7. The composition of claim 1 , further comprising strontium (Sr) in an amount of 1-50,000 parts per million (ppm).
8. The composition of claim 1 , wherein the composition is a particulate composition with an average particle size of 0.1-100 microns.
9. The composition of claim 1 , further comprising nitrogen oxide, sulfur oxide, mercury, metal, derivative of any of nitrogen oxide, sulfur oxide, mercury, metal, or combination thereof.
10. The composition of claim 1 , further comprising Portland cement clinker, aggregate, other supplementary cementitious material (SCM), or combination thereof.
11. A composition, comprising a SCM of claim 1 , wherein at least 16% by wt of SCM mixed with OPC upon combination with water, setting, and hardening, results in no more than 10% reduction in a compressive strength of the OPC at 28 days when compared to the compressive strength in a range of 17-45 MPa of the OPC along upon combination with water, setting, and hardening.