C-CRETE CEMENT
Company:
C-Crete Technologies
Location:
San Leandro, California
Products:
Cement
Technology:
Certain rock minerals and industrial waste (slag, granite, zeolite, basalt) are ground and mixed with a chemical (NaOH?) that a makes the powder reactive. Synthesized at lower temperatures than OPC.
Meets ASTM C1157, the performance specification for hydraulic cement. Meets ASTM durability and mechanical requirements.
Benefits:
CO2 is captured from the atmosphere during curing. Dramatic reduction in carbon emissions (undefined). Good performance and durability test results. Hydraulic cement that requires about 1/2 of the water required for OPC. Saves up to 1 ton CO2 per ton of binder used (vs OPC?) Concrete sourced in California and placed in over 8 states in U.S. Scalability enhanced by potential for dispersed involvement by existing cement/concrete plant.
Possible disadvantages:
Shipping costs. Long-term durability is unknown. Requires proven mix proportions. Supply chain issues. Capital costs for expansion. Primary feedstock, zeolite, may be limited to certain geographical areas in the western U.S.
Status:
Placed 3,000 Mt since 2023. Working on an EPD in 2025.
TRL estimated at 7.
Production:
Pilot plant in San Leandro, CA, planned for about 5,000 Mt/year. Talking with cement and ready-mix plants about installing facilities.