CR Minerals, Rio Tinto see the mine tailings pile for the pozzolans

Sources: CR Minerals Company LLC, Southlake, Texas; CP staff

Natural pozzolans production leader CR Minerals has entered an agreement with Rio Tinto to process a new grade of concrete binder with pozzolanic properties. CR Minerals will build a processing facility at the mining giant’s US Borax operation in Boron, Calif., using mine tailings as feedstock.

With ore output approaching 1 million tons annually, the Boron mine yields nearly a third of refined borate products for domestic and global markets..

“We have been working with Rio Tinto for several years now to bring this concept to life. Taking what was once considered waste streams and turning them into usable products for the construction materials industry is part of the vision of our company,” says CR Minerals President Jeffrey Whidden. “Manufacturing a low carbon alternative to cement will be an exciting venture in the State of California, which prides itself on being at the forefront of effecting positive environmental change.”

“Rio Tinto continues to demonstrate its leadership in the mining industry through this agreement,” adds US Borax General Manager Renny Dillinger. “Our commitment to the environment and leaving a lasting, positive legacy is fundamental to our sustainability goals. Finding new uses for our waste streams and byproducts such as this is a key component to

our goal of decarbonization and also to achieving a circular economy.”

The CR Minerals project follows Rio Tinto’s recent participation in a seed funding round for Terra CO2 Technology Holdings, Colorado-based supplementary cementitious materials developer. 

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