Corrosion Measurements in Reinforced Fly Ash Concrete Containing Steel Fibres Using Strain Gauge Technique

Table 2

Microstrain values for various mixture proportions of concrete.

Mix ID	Fly ash %	Steel fibres % (𝑉𝑓)	Microstrain (µm)							Total thickness of corroded bar at 90 days (mm)
			1 day	3 days	7 days	14 days	28 days	56 days	90 days
MC1	0	0	0	0	0	601	731	842	1020	9.02
MC2	0	0.5	0	0	0	632	762	813	981	8.98
MC3	0	1	0	0	0	693	715	795	802	8.80
MC4	0	1.5	0	0	0	542	691	757	840	8.84
MFC1A	25	0	0	0	0	561	658	840	943	8.94
MSF1	25	0.5	0	0	0	494	582	701	750	8.75
MSF2	25	1	0	0	0	537	671	749	831	8.83
MSF3	25	1.5	0	0	0	571	642	810	933	8.93
MFC2A	50	0	0	0	0	415	580	642	758	8.76
MSF7	50	0.5	0	0	0	393	511	563	712	8.71
MSF8	50	1	0	0	0	372	434	519	696	8.69
MSF9	50	1.5	0	0	0	314	382	492	632	8.63