The Green Cement Technology Tracker currently includes only cement producers' carbon-capture projects.

Start-ups have until May 15 to apply for assistance developing cleaner-concrete technologies and processes.

Enacted legislation offers a financial performance bonus for concrete producers that provide low embodied-carbon products for state projects.

Startups and more established suppliers of products that reduce the carbon footprint of concrete are developing systems to make the product more sustainable.

Suppliers are beginning to offer concrete and cement products with reduced carbon content, but roadblocks remain in the way of widespread market penetration.

A new type of cement that is based on a blend of limestone and calcined clay is gaining acceptance.