C5 Cement
Congruent Calcium Concentration via Controlled Carbonation
Ordinary Portland cement (OPC) production is the second most energy intensive industrial sector in the United States (after electricity production) because of the extremely high temperatures (~1450ºC) that are required to treat the limestone feedstock. Our team is developing novel pathways to make high-strength, low-permeability, high durability materials with only a fraction of the energy and emissions that come from OPC.
Unpacking fundamental dissolution/precipitation processes
Our patent-pending processes are inspired by the carbonation of calcium silicate (CaSiO3) feedstocks but would be flexible to allow substitution depending on feedstock availability. We are translating our production process to large scale using inexpensive mineral feedstocks and waste materials such as industrial slag, fly ash, and/or waste heat and CO2 in flue gas streams. Our congruent calcium concentration via controlled carbonation (C5) cements are rich in crystalline calcium silicate hydrate (CCSH) mineral phases with some similarities to those that give ancient Roman cements much of its remarkable strength and durability. These product phases are abundant and can be tailored to the end use by controlling the feedstock chemistry and the curing conditions. Our project is developing the chemical understanding needed to leverage this chemistry as enabling for a range of high-value add applications in infrastructure, energy, and building. The graphic to the right shows differences in morphology and compressive strength between our materials and some leading alternative cements.
Unlocking new ways to make new low-carbon building materials
Our team is also developing the flask-to-field engineering knowledge needed to deliver viable products to a range of clients.