Physicochemical Properties of Handere Clays and Their Use as a Building Material

Table 1

Chemical composition of various clay minerals [17].

Clay	SiO2	Al2O3	Fe2O3	MgO	CaO	K2O	Na2O	TiO2	H2O	Total
Kaolinite	46.90	37.40	0.66	0.27	0.29	0.84	0.44	0.18	12.95	99.92
Nacrite	44.75	39.48	0.53	0.19	0.13	0.34	0.22	—	14.40	100
Stalagmites	46.86	37.12	1.43	0.09	0.22	0.60	0.07	0.51	12.99	99.89
Halloysite	44.75	36.94	0.31	—	0.11	0.60	—	—	17.42	100.01
Anauxite	54.32	29.96	2.00	0.14	0.32	—	0.37	—	12.64	99.75
Nontronite	40.54	5.19	31.63	0.06	1.92	0.24	0.14	—	20.75	100.47
Chlorite	31.44	17.62	—	37.64	—	—	—	—	13.19	99.89
Prochlorite	23.69	21.26	26.52	17.60	3.22	—	—	—	7.63	99.92
Sepiolite	52.50	0.60	2.99	21.31	0.47	—	—	—	21.27	99.14
Attapulgite	57.85	7.89	2.82	13.44	0.30	0.08	0.53	—	16.95	99.86