Geopolymers Based on Phosphoric Acid and Illito-Kaolinitic Clay

Table 1

Chemical composition of used materials.

	Compositions (mass%)
	SiO2	Al2O	Fe2O3	MgO	Na2O	CaO	K2O	SO3	PO3	LOI
Medenine clay	60.8	16.20	5.87	2.38	0.003	2.15	2.71	0.08	—	9.16
H3PO4	—	—	—	—	—	—	—	—	85	—