Revolutionizing cement technology
Concrete forms the foundation of buildings, infrastructure, water management, residential, landscape, and marine projects. Purdue University researchers have developed new innovative methods for concrete deposition and application.
solution 1
Researchers have developed a cement formulation that has a carbon-negative impact; it removes more carbon from the atmosphere compared to what’s emitted when it is manufactured and transported.
The synthesis of oxalic acid from existing carbon dioxide has traditionally been impeded by high energy costs and severe pollution, but Purdue’s method converts materials to fermentable sugars, which increases the strength of the cement and affects hydration.
Technology Validation:
This technique also prevents corrosion in the long-term, providing a viable eco-friendly alternative to current concrete/construction systems. The researchers successfully produced oxalic acid from corn stover.
solution 2
Researchers have developed a chemically modified version of renewable and abundant nanocellulose, improving the behavior and mechanical properties of cement paste. The technology offers increased strength and resiliency in the construction of roads, bridges, and buildings.
Technology Validation:
Mechanical tests showed an increased flexural strength of approximately 30% with 0.2% volume of cellulose nanocrystals integrated into the cement.
solution 3
Researchers have developed a multifunctional powdered polymer-silicate admixture that produces stronger and longer-lasting cement. The admixture is produced as a dry powder that is easily incorporated into cast cementitious systems.
Technology Validation:
Rheometry data showed a greater storage modulus than loss modulus, indicating the transition from a liquid solution to a solid gel-like material with the addition of silicate groups that function as crosslinks with the polymer particle. Swelling data showed that absorption capacity was reduced for admixture particles that contained greater amounts of the organic silicate groups.
solution 4
Researchers have developed a new class of cement inspired by oysters and the adhesive they use to attach to hard surfaces and form reefs. The material surpasses commercial masonry sealant benchmarks and, when added to a commercial mortar mix, substantially increases both adhesion and compressive strength.
Technology Validation:
The biomimetic polymers performed well, demonstrating adhesion up to 5 ± 2 MPa. Elmer’s Glue-All achieved a bonding of 1.1 ± 0.3 MPa, and Loctite Super Glue was 4.9 ± 0.5 MPa for these conditions. These results show that the biomimetic polymer can exceed the strength of commercial counterparts.
Industry partners interested in developing or commercializing the innovations should contact Jacob Brejcha, Licensing Associate – Physical Science, jjbrejcha@prf.org.
