Recycling Glass Cullet from Waste CRTs for the Production of High Strength Mortars

Table 1

Composition (oxide wt%), organic carbon, specific gravity, LOI and fineness modulus of milled CRT mixed glass, cement and aggregate; “undetermined” indicates the cumulative quantity of all oxides determined in quantity lower than 0.1 wt%.

Component	CRT glass	Cement	Aggregate
SiO2	59.74	21.40	1.98
Al2O3	2.67	1.48	1.72
CaO	2.06	61.02	46.73
MgO	1.15	1.16	19.83
Na2O	6.81	0.26	1.43
K2O	6.15	0.53	0.74
Fe2O3	0.11	0.35	2.1
TiO2	0.17	<0.1	<0.1
CuO	0.21	<0.1	<0.1
BaO	6.13	<0.1	<0.1
SrO	4.77	<0.1	<0.1
Sb2O3	0.28	<0.1	<0.1
ZrO2	0.39	<0.1	<0.1
PbO	8.33	<0.1	<0.1
SO4^=	0.49	2.92	0.13
C (organic)	<0.1	1.20	0.57
Undetermined	0.93	1.38	1.92
Density (g cm^−3)	2.95	3.03	2.46
Water abs. (%)	0.20	—	0.37
LOI (%)	0.82	13.14	23.55
Fineness modulus	0.72	—	3.48