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Silica Encapsulation of Ureolytic Bacteria for Self-healing of Cement-Based Composites
Category(s):
For Information, Contact:
Craig Forney
Commercialization Manager, Chemistry and Materials Sciences
515-294-4740
licensing@iastate.edu
Web Published:
12/13/2016
ISURF #
4465
Summary:
Iowa State University researchers have developed a method to encapsulate bacteria for incorporation into concrete as the basis for self-healing of cracks.

Development Stage:
Description:
Microbially-Induced Carbonate Precipitation has been well studied as a mechanism for the surface repair of concrete structures and soil stabilization.  Use of MICP in concrete mixture as a built-in repair system, however, has been slow to develop because of the difficulty of preparing microorganisms for long-term survival in cured concrete.
ISU researchers have developed a method to encapsulate ureolytic bacteria in a silica shell before freeze-drying, providing a protective shell that is compatible with the calcium silicates of Portland cement.  Survival of the freeze dried bacteria in cured concrete and utility of the encapsulated bacteria to induce carbonate precipitation in fractured cement paste has been demonstrated.

Advantage:
• Demonstrated healing of stressed concrete samples
• Cost-effective encapsulation of bacteria
• Bio-friendly
Application:
Self-healing of concrete

Patent Information:
*To see the full version of the patent(s), follow the link below, then click on "Images" button.

Patent:
Patent(s) applied for

Direct Link: