Table 3. Chemical composition of dry and... | Emerald Publishing

Table 3.

Chemical composition of dry and laboratory wet-stored DFA5 (10% moisture, 20°C)

Characteristic	Dry	Storage period: days
Characteristic	Dry	7	30	90	180	730
Oxide composition: %
CaO	2.2	2.5	2.1	2.4	2.0	2.1
SiO₂	41.3	46.4	40.8	42.8	44.9	40.1
Al₂O₃	23.4	24.6	23.3	24.1	24.1	22.2
Fe₂O₃	6.7	6.6	5.9	5.9	7.0	5.8
MgO	0.9	1.0	0.9	1.0	2.0	0.9
TiO₂	0.9	0.9	1.0	0.8	0.9	0.7
P₂O₅	0.9	0.9	0.9	1.0	0.9	0.9
K₂O	2.3	2.0	2.2	2.0	2.0	1.6
Na₂O	0.7	0.6	0.6	0.6	0.6	0.6
SO₃	2.0	2.1	1.0	1.6	0.9	2.2
Mineral composition: %
Quartz	1.6	1.9	1.4	2.0	2.1	0.9
Hematite	2.8	0.9	0.2	1.2	0.6	0.2
Magnetite	0.0	0.1	0.1	0.1	0.0	0.0
Mullite	6.4	6.6	5.6	7.0	6.3	5.0
Loss-on-ignition	13.6	13.9	14.5	14.4	14.3	13.4
Glass/other^a	75.6	76.6	78.2	75.3	76.7	80.5

Characteristic	Dry	Storage period: days
Characteristic	Dry	7	30	90	180	730
Oxide composition: %
CaO	2.2	2.5	2.1	2.4	2.0	2.1
SiO₂	41.3	46.4	40.8	42.8	44.9	40.1
Al₂O₃	23.4	24.6	23.3	24.1	24.1	22.2
Fe₂O₃	6.7	6.6	5.9	5.9	7.0	5.8
MgO	0.9	1.0	0.9	1.0	2.0	0.9
TiO₂	0.9	0.9	1.0	0.8	0.9	0.7
P₂O₅	0.9	0.9	0.9	1.0	0.9	0.9
K₂O	2.3	2.0	2.2	2.0	2.0	1.6
Na₂O	0.7	0.6	0.6	0.6	0.6	0.6
SO₃	2.0	2.1	1.0	1.6	0.9	2.2
Mineral composition: %
Quartz	1.6	1.9	1.4	2.0	2.1	0.9
Hematite	2.8	0.9	0.2	1.2	0.6	0.2
Magnetite	0.0	0.1	0.1	0.1	0.0	0.0
Mullite	6.4	6.6	5.6	7.0	6.3	5.0
Loss-on-ignition	13.6	13.9	14.5	14.4	14.3	13.4
Glass/other^a	75.6	76.6	78.2	75.3	76.7	80.5

^a

Not including LOI