Geopolymers based on clay materials from Burkina Faso were developed and then characterized for use in
construction. The results of the characterization of the clay mineral material referenced TAN as well as its calcined
forms TAN 700 and TAN 800 have shown by several analysis techniques (DRX, IR, ICP-AES) that TAN contains
kaolinite (71%), quartz (20%) illite (4%) and goethite (2%); TAN 700 and TAN 800 are essentially made of quartz.
These clays are each mixed with the alkaline solution (sodium hydroxide solution 8 mol. L-1) in a mass ratio
(alkaline solution / clay) ranging from 0.33 to 0.36. The results of the mechanical and mineralogical tests of the
geopolymers produced showed that the grade G08 produced had the best performance favorable for its use in
construction. Indeed, its linear shrinkage (3.44%) is low and the compressive strength (22.50 MPa) is greater than
4 MPa. This performance of G08 is due to the formation of a phase rich in silica and in alumina
(Na2(AlSiO4)6(OH)2. 2H2O).

Clay development geopolymer characterization construction