Effect of Fly Ash on Mortar Mixes with Quarry Dust as Fine Aggregate

Table 3

Chemical properties of fly ash.

Sl. number	Test conducted	Observed values (%)	Requirement as per IS: 1320-1981
1	Loss of ignition	2.32	5.0 (max)
2	Silica as SiO2	42.04	SiO2 + Fe2O3 + Al2O3 = 70
3	Iron as Fe2O3	4.40	—
4	Alumina as Al2O3	33.60	—
5	Calcium as CaO	12.73	—
6	Magnesium as MgO	0.00	5.0 (max)
7	Sulphate as SO3	0.40	3.0 (max)
8	Lime reactivity	4 N/mm^2	4.5 (max)