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Carlos Fernandez, PhD
Chief Chemical Engineer, Materials
Carlos Fernandez, PhD
Chief Chemical Engineer, Materials
Biography
Much of the world is covered in concrete: It paves rough surfaces, forms a basis for buildings, and encases infrastructure in harsh environments. PNNL Chemical Engineer Carlos Fernandez is reimagining this and other materials for an array of applications.
Fernandez has developed a self-healing cement—the main ingredient in concrete—that could transform the geothermal energy and construction industries. The breakthrough relies on the inclusion of a polymer, which is a chain-like molecule that lends flexibility. By avoiding the need to repair or replace cracking cement, the invention could help save billions of dollars and avoid the pollution associated with producing new materials. It could also make underground wells and casings safer.
“Our self-healing cement is the first technology with the ability to self-repair cracks throughout the entire life span of the concrete structure, leading to significant energy and cost savings while reducing the carbon footprint associated with cement manufacturing,” Fernandez said. The technology was recognized in two R&D 100 Award categories in 2020, winning in mechanical/materials and garnering a silver medal for green tech.
Fernandez and colleagues have also pioneered a greener and less energy-intensive fracturing fluid for geothermal energy called StimuFrac™. Such fluids are used to fracture rock deep below the surface, releasing energy in the form of heat. PNNL’s version uses significantly less water than conventional fracturing methods.
The Institute of Chemical Engineers presented Fernandez with its 2015 Global Award for Outstanding Achievement in Chemical Engineering, and the Geothermal Technology Office named him as an Exceptional Individual for the 2015 Presidential Early Career Awards for Scientists and Engineers.
More Information
“Self-Healing Polymer Cement Offers Concrete Alternative.” May 4, 2020, Materials Performance.
“PNNL’s Self-Healing Cement Shows 87% Reduction in Surface Fractures.” May 8, 2019, World Industrial Reporter.
“A Sidewalk That Repairs Itself? PNNL Cracks the Code for Self-Healing Cement.” August 28, 2018, Tri-City Herald.