TerraCO2 is a scalable, low-carbon alternative for cement replacement.

For every ton of Portland cement displaced by a Terra product, a 70% reduction in CO2 emissions is achieved.

Introducing: OPUS
Made with abundant, inexpensive, climate-friendly feedstock.

Today, cement production accounts for 8% of all greenhouse gas emissions worldwide. We replace cement with a climate-friendly, cost-competitive supplementary and alternative cementitious materials that achieve performance parity in their respective categories.

Our Opus products use abundantly available silicate rocks that can be sourced from existing aggregate mines close to any major market. This creates a huge advantage because it works at scale, using existing infrastructure.

Terra products can also drive up to a 90% reduction in NOx emissions.

Concrete is the world’s second-most-used material next to water. The production of concrete is 65 times more in volume and 20 times more in mass than steel, its closest competitor. The corresponding CO2 and NOx emissions make supplementing and eventually replacing Portland cement a climate imperative.

Our supplementary and alternative cementitious materials scale to meet the immense demands of cement demand and finally makes decarbonized cement a viable, affordable alternative for our industry. We use the most abundant silicate rock materials at the Earth’s surface, representing 90% of the Earth’s rock-based crust. Our feedstocks do not emit CO2 or NOx when heated.

Cement vs. Concrete

Cement is the key ingredient in concrete that causes it to harden. Concrete is the material used to construct buildings.


  • Annual global CO2 emissions from cement


  • Tons of Portland cement produced annually

    4.1 billion tons

  • Tons of CO2 emitted per 1 ton of Portland cement


Our Products

Whether you’re looking to supplement, replace, or blend Portland cement, TerraCO2 can help decarbonize production.

  • OPUS Supplementary Cementitious Material (SCM) can offset the use of 10-30% of Portland Cement in most common concrete mix designs.

  • OPUS Blended Cementitious Material (BCM) is a natural intermediary between SCM and alternative cement chemistry.

  • Designed to facilitate a step change in sustainable concrete supply, OPUS Alternative Cementitious Material (ACM) was our first and most ambitious development.

"Concrete construction is here to stay, but the cement we use to make concrete is evolving. Terra’s cementitious reagent technology is unique because it supports a staged transition between current and future cement chemistries. First, we are providing a synthetic replacement for Type F coal fly ash, and, in the future, we believe our supply chain will play a key role in the transition to advanced low-CO2 cements. Terra’s technology is one important piece of the transition to safe, long-lasting, and carbon-neutral cement."


Extensively Tested and Independently Validated

We have spent years of R+D effort and millions of dollars to validate our technology and materials. Our commercial processes and products undergo extensive third-party testing and diligence to independently verify our results, and we’d love the opportunity to show you exactly how our products perform in the real world.

Cost Competitive Products

Many sustainable and green technologies never reach scale because the underlying technology is too expensive to use in the real world. Other technologies in our industry rely on scarce or depleting feedstocks that often have to be transported great distances. Terra’s eco-friendly, supplementary cementitious materials are cost competitive and ready to deploy today.

The future of cement is eco-friendly.