US 11,987,741 B2
Biocementation systems and methods
Edward Kavazanjian, Tempe, AZ (US); Nasser Hamdan, Scottsdale, AZ (US); Hamed Khodadadi Tirkolaei, Tempe, AZ (US); and Abdullah Almajed, Tempe, AZ (US)
Assigned to ARIZONA BOARD OF REGENTS ON BEHALF OF ARIZONA STATE UNIVERSITY, Scottsdale, AZ (US)
Filed by ARIZONA BOARD OF REGENTS ON BEHALF OF ARIZONA STATE UNIVERSITY, Scottsdale, AZ (US)
Filed on Mar. 4, 2021, as Appl. No. 17/192,337.
Application 17/192,337 is a continuation of application No. PCT/US2019/050474, filed on Sep. 10, 2019.
Claims priority of provisional application 62/729,221, filed on Sep. 10, 2018.
Prior Publication US 2021/0189238 A1, Jun. 24, 2021
Int. Cl. C09K 17/44 (2006.01); C04B 24/14 (2006.01); C04B 28/00 (2006.01); C04B 103/00 (2006.01); C04B 111/00 (2006.01); E02D 3/12 (2006.01)
CPC C09K 17/44 (2013.01) [C04B 24/14 (2013.01); C04B 28/003 (2013.01); E02D 3/12 (2013.01); C04B 2103/0001 (2013.01); C04B 2111/00732 (2013.01); C12Y 305/01005 (2013.01); E02D 2300/0025 (2013.01); E02D 2300/0045 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method of biocementation comprising:
treating, via only one treatment cycle, a granular, cohesionless soil with a solution comprising:
urea;
urease;
a source of calcium ions; and
a source of non-urease proteins, wherein the urea, urease, source of calcium ions, and source of non-urease proteins are provided in effective amounts suitable to cause crystallization of calcium carbonate, and wherein the source of non-urease proteins comprises an enzyme stabilizer; and
responsive to the only one treatment cycle, forming an enzyme induced carbonate precipitation (EICP) treated soil comprising an unconfined compressive strength of greater than 0.5 MPa and a carbonate content of less than 3% by weight.