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. 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. Concrete supplied from California and placed in over 8 states in U.S. Scalability enhanced by potential for dispersed involvement of existing cement/concrete plant.
Possible disadvantages:
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. Shipping costs if developed in the western U.S.
Status:
At the end of 2025 over 3,000 Mt placed since 2023. Working on an EPD in 2025.
TRL estimated at 7.
Production:
Pilot plant in San Leandro, CA, originally planned for about 6,250 Mt/year. Talking with cement and ready-mix plants about installing additional facilities.