Table 2. Physical and chemical... | Emerald Publishing

Table 2.

Physical and chemical characteristics of dry and stockpile fly ashes used during the study

Characteristic	Dry fly ash			Stockpile fly ash
Characteristic	DFA1	DFA3	DFA5	SFA1	SFA2	SFA4
Physical properties/LOI
Moisture content: %	—	—	—	12.7	21.1	15.7
Fineness, 45 μm sieve retention: %	33.9	5.7	18.4	53.8	47.9	41.1
Median particle size, d₅₀: μm	39.4	4.3	23.9	31.2	43.9	28.3
LOI: %	8.3	5.6	13.6	9.7	8.9	15.9
Oxide composition: %
CaO	4.5	3.1	2.2	4.4	2.3	2.1
SiO₂	47.9	50.1	41.3	44.3	43.7	41.2
Al₂O₃	20.3	22.4	23.4	21.8	22.9	22.7
Fe₂O₃	7.4	7.6	6.7	9.0	9.4	7.4
MgO	—	1.6	0.9	1.6	1.5	1.0
TiO₂	0.9	0.9	0.9	1.1	1.0	0.9
P₂O₅	0.6	0.4	0.9	0.6	0.4	0.8
K₂O	2.2	2.5	2.3	2.0	2.4	2.3
Na₂O	1.5	1.7	0.7	0.8	0.7	1.0
SO₃	1.8	1.2	2.0	1.6	1.3	1.4
Mineral composition: %
Quartz	5.0	5.1	1.6	4.3	7.5	1.1
Hematite	0.6	2.0	2.8	1.7	1.7	0.5
Magnetite	0.2	0.1	0.0	0.2	0.0	0.1
Mullite	5.7	4.7	6.4	7.0	10.0	3.2
Glass/other^a	80.2	82.5	75.6	77.2	71.9	79.2

Characteristic	Dry fly ash			Stockpile fly ash
Characteristic	DFA1	DFA3	DFA5	SFA1	SFA2	SFA4
Physical properties/LOI
Moisture content: %	—	—	—	12.7	21.1	15.7
Fineness, 45 μm sieve retention: %	33.9	5.7	18.4	53.8	47.9	41.1
Median particle size, d₅₀: μm	39.4	4.3	23.9	31.2	43.9	28.3
LOI: %	8.3	5.6	13.6	9.7	8.9	15.9
Oxide composition: %
CaO	4.5	3.1	2.2	4.4	2.3	2.1
SiO₂	47.9	50.1	41.3	44.3	43.7	41.2
Al₂O₃	20.3	22.4	23.4	21.8	22.9	22.7
Fe₂O₃	7.4	7.6	6.7	9.0	9.4	7.4
MgO	—	1.6	0.9	1.6	1.5	1.0
TiO₂	0.9	0.9	0.9	1.1	1.0	0.9
P₂O₅	0.6	0.4	0.9	0.6	0.4	0.8
K₂O	2.2	2.5	2.3	2.0	2.4	2.3
Na₂O	1.5	1.7	0.7	0.8	0.7	1.0
SO₃	1.8	1.2	2.0	1.6	1.3	1.4
Mineral composition: %
Quartz	5.0	5.1	1.6	4.3	7.5	1.1
Hematite	0.6	2.0	2.8	1.7	1.7	0.5
Magnetite	0.2	0.1	0.0	0.2	0.0	0.1
Mullite	5.7	4.7	6.4	7.0	10.0	3.2
Glass/other^a	80.2	82.5	75.6	77.2	71.9	79.2

^a

Not including LOI