Sawdust Ash as Powder Material for Self-Compacting Concrete Containing Naphthalene Sulfonate

Table 1

Chemical and physical properties of OPC and SDA.

Oxides	Ashaka PC	Sawdust ash
SiO2(%)	20.7	67.2
Al2O3 (%)	6.1	4.1
Fe2O3 (%)	2.3	2.3
CaO (%)	62.1	10.0
MgO (%)	1.2	5.8
Na2O (%)	0.9	0.1
K2O (%)	1.0	0.1
SO2 (%)	1.6	0.5
P2O5 (%)	—	0.5
MnO (%)	—	0.01
Specific gravity	3.15	2.29
Ignition loss (%)	1.00	4.6
Loose bulk density (kg/m^3)	1550	830
Specific surface Blaine (m^2/kg)	355	151
Moisture content (%)	—	0.37
pH value		10.10
Bogue potential compound composition:
C3S  46
C2S  24
C3A  12
C4AF  7