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CarbonBuilt

CarbonBuilt develops Reversa® Binder, a patented, low-carbon alternative to cement that uses industrial byproducts and captured CO₂ to create concrete with a 70–100% lower carbon footprint, reducing costs by 10–30% while meeting performance standards.
2020
11-50
Los Angeles, California, United States

https://www.carbonbuilt.com/

Building MaterialsCarbon CaptureCleanTechManufacturingSustainability
Innovation
Investment Funding
People
Products
Future Plan
Awards and Recognitions
M&A and Collabs
News

Innovation

Industry Problem

CarbonBuilt is driving large-scale emissions reductions by cost-effectively utilizing industrial byproducts and captured CO₂ in concrete production.

R&D Focus

CarbonBuilt focuses its R&D on cement chemistry and materials science, specifically in the formulation of ultra-low carbon concrete using industrial byproducts and captured CO₂. Their R&D is concentrated in decarbonizing concrete production, particularly by developing and optimizing carbon-negative binders (such as Reversa®) that can be easily adopted by existing concrete manufacturers without changing core operations.

Innovative Solution

CarbonBuilt addresses the carbon-intensive nature of traditional concrete production by introducing its Reversa® Binder, a proprietary blend of industrial byproducts that replaces most of the high-emission Portland cement. This binder reacts with captured CO₂ during curing, permanently storing it as solid calcium carbonate, which is designed for seamless integration. The technology can be retrofitted into existing concrete plants, enabling rapid and scalable decarbonization of the construction industry.

Solution Effectiveness

CarbonBuilt’s Reversa® technology delivers a 70–100% reduction in embodied carbon by replacing most Portland cement with a low-cost, industrial byproduct-based binder that permanently stores captured CO₂ during curing. This innovation lowers raw material costs by 10–30% while meeting stringent ASTM performance standards, making it a scalable, cost-effective solution that significantly reduces concrete’s carbon footprint without compromising quality.

Investment Funding

Last Funding Stage

Early Stage Venture

Total Funding Amount

$10.0M

Last Funding Amount

$10.0M

Last Funding Date

October, 2021

Startup Stage

Series A

Lead Investors

Foundamental, Climate Capital, Grantham Foundation, Pritzker Group, Lime Street Ventures

Revenue

$1M to $10M

People

Founders

  • Gaurav Sant

Board Members

  • Neil Renninger
  • Alex Hall

CEO

  • Michelle Hellums Carvin

Products

Product

– Reversa® Binder – A proprietary blend of industrial byproducts that replaces traditional Portland cement in concrete, drastically reducing embodied carbon. – Ultra-Low Carbon Concrete Blocks (CMUs) – Commercially available concrete masonry units produced using Reversa® Binder, delivering up to 100% reduction in embodied CO₂. – CO₂ Mineralization Technology – A curing process that permanently sequesters CO₂ (from flue gas, biomass, or DAC) into the concrete, ensuring verifiable and durable carbon removal.

Star Product

Reversa® Binder is CarbonBuilt’s foundational innovation that enables the company’s ultra-low-carbon concrete solution. It replaces most of the carbon-intensive Portland cement with a blend of widely available industrial byproducts, cutting embodied carbon by up to 100%. It is a star product due to its scalability, cost-effectiveness, and seamless integration into existing concrete production infrastructure.

Demo Product or Complete Product?

CarbonBuilt’s inaugural commercial product is its ultra-low carbon concrete blocks, produced using the proprietary Reversa® Binder technology.

Future Plan

Market Expansion

– MSCI Carbon Markets’ latest modeling suggests that the global carbon credit market could rise in value to at least USD 7 billion, and perhaps as much as USD 35 billion, by 2030. Roll forward to 2050, and the market could be worth USD 45 to USD 250 billion, as our final exhibit depicts.

Awards and Recognitions

Awards

– Fast Company Innovation by Design Awards (2023) – BuiltWorlds 2024 Mavericks 50 List

Media Apperance

– Retrofit Magazine – Axios – Canary Media – Carbon Leadership Forum

Certifications

– National Carbon Capture Center Validation – ISO 14034 Environmental Technology Verification (ETV)

M&A and Collabs

Collab

CarbonBuilt Collaborates with Meta to Accelerate Production of Ultra-Low Carbon Concrete in 2024

Collab

CarbonBuilt collaborated with Blair Block for Commercial Introduction of Low Carbon Concrete Technology in 2022

Acquisitions

CarbonBuilt acquired Jolley Concrete & Block in February 4, 2025

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