Alkali-Activated Cement


Living on Earth

radio interview (6 minutes)
Bloomberg TV segment

(3 minutes)
with interactive menu
(10 minutes)



Ordinary portland cement (OPC) is strong and versatile, but produces 5% of global CO2, only lasts 50 years, and is unaffordable in developing nations.

Why use our Alkali-Activated Cements (AACs)?:

  • Up To 97% Less CO2 and Energy – A revolutionary answer to “green” demand
  • Up to 50% Savings on Manufacturing Cost Over OPC– Inexpensive materials, no kiln
  • Competitive Strength – Up to 65 MPa (9.5 ksi)
  • Megascale Recycling – Of slag and fly ash, common industrial byproducts
  • Longer Life – By decades; possibly by centuries
  • Better durability – In harsh marine, freeze-thaw, acidic, and other environments
  • Versatile - Can be used anywhere that other cements, mortars, or concretes are used
  • Certified – Pass ASTM C1157 (pending independent certification) and Indian Standards (IS) grade 33, 43, and 53
  • Direct OPC replacment - uses ubiquitous materials, cures at room temperature, similar workability
  • Color – Can be as white as White Portland, or any other desired color

    Our research, development, and implementation follows three complementary paths:

    • Science – Using state-of-the-art techniques, we are working to better understand why and how AACs behave as they do. This is important in optimizing the materials and mixtures used and to allow for the use of varying feedstocks.
    • Industry – We are working toward passing ASTM tests and standards to allow for commercial use of AACs. We have tested some beam, block, and other prototypes and look forward to scaling up further.
    • Humanitarian - Through a partnership with IIT Bombay and industry and humanitarian organizations, we are working to develop low-cost yet high-quality building materials. In the context of appropriate technology, this will allow for better and more plentiful housing options for people moving up out of the slums.

    Select press and media:


    We are grateful that this work has been previously funded by an EPA P3 Phase I (2009) and is currently funded by an EPA P3 Phase II (2010) grant and the second annual iCAST Marketplace Triple Bottom-Line Impact Award. Our P3 poster is available here.



    Last Updated on Saturday, 30 March 2013 21:31