Corrosion Zones of Rebar in High-Volume Fly-Ash Concrete through Potentiodynamic Study in Concrete Powder Solution Extracts: A Sustainable Construction Approach

Table 1

Chemical compositions of cement and fly ash.

Oxides	SiO2	Al2O3	Fe2O3	CaO	MgO	K2O	Na2O	SO3	Loss of ignition
OPC	19.47	5.34	4.24	64.27	1.07	0.78	0.54	1.86	2.43
FA	54.5	29.32	9.61	2.4	0.74	0.69	1.51	0.0.	1.19