Percentage of pozzalanic material used in high strength concrete as per IS 10262:2019
For flyash : 15 -30 %
Microsilica: 5-10 %
GGBFS : 25 - 50 %
Metakaoline : 5 - 15 %
Limitation of pozzalanic material used during manufacturing of cement
For PPC CEMENT - 15 TO 35% replacement of flyash to total opc content.( IS 1489 PART FIRST)
For Psc cement - 25 To 70 % replacement of GGBFS to total opc content.(IS 455)
Ratio of pozzalana and cement during consistency , intial and final setting time of pozzalanic material as per IS 1727
0.2N : 0.8
where N is the ratio between specific gravity of pozzolana material to specific gravity of cement.
It is generally taken as 1 as per IS 15388.
Ratio of pozzalana , cement and standard sand during cube casting .
0.2N :0.8: 3
where 0.2 is pozzalanic material
0.8 is opc cement
3.0 is standard sand ( IS 650)
and value of N is 1
For checking compressive strength after curing we need to apply load 140 KG/ CM2 / MINUTE. ( IS 1727)
Fineness of microsilica by wet seiving is not more than 10 % from 45 micron seive.
coating thickness of FBEC steel should be between 100 - 300 micron as per IS 13620
IT IS CHECKED BY ELCO METER.
HOLIDAY IN STEEL: Holiday may be defined as defects, cracks, pinholes present in steel it will be detected by holiday detector machine.
Holiday detector machine is used to detect defects in steel in which a wet spounge is used and a DC VOLTAGE of 67.5 is apply , this spounge apply on the surface of steel if any defect present in the steel water penetrate from spounge to defect ex. crack and a electric circuit complete and shows defect on this particular area.
AVERAGE HOLIDAY IS NOT MORE THAN 2 IN 300 CM LENGTH OF STEEL.
For flyash : 15 -30 %
Microsilica: 5-10 %
GGBFS : 25 - 50 %
Metakaoline : 5 - 15 %
Limitation of pozzalanic material used during manufacturing of cement
For PPC CEMENT - 15 TO 35% replacement of flyash to total opc content.( IS 1489 PART FIRST)
For Psc cement - 25 To 70 % replacement of GGBFS to total opc content.(IS 455)
Ratio of pozzalana and cement during consistency , intial and final setting time of pozzalanic material as per IS 1727
0.2N : 0.8
where N is the ratio between specific gravity of pozzolana material to specific gravity of cement.
It is generally taken as 1 as per IS 15388.
Ratio of pozzalana , cement and standard sand during cube casting .
0.2N :0.8: 3
where 0.2 is pozzalanic material
0.8 is opc cement
3.0 is standard sand ( IS 650)
and value of N is 1
For checking compressive strength after curing we need to apply load 140 KG/ CM2 / MINUTE. ( IS 1727)
Fineness of microsilica by wet seiving is not more than 10 % from 45 micron seive.
coating thickness of FBEC steel should be between 100 - 300 micron as per IS 13620
IT IS CHECKED BY ELCO METER.
HOLIDAY IN STEEL: Holiday may be defined as defects, cracks, pinholes present in steel it will be detected by holiday detector machine.
Holiday detector machine is used to detect defects in steel in which a wet spounge is used and a DC VOLTAGE of 67.5 is apply , this spounge apply on the surface of steel if any defect present in the steel water penetrate from spounge to defect ex. crack and a electric circuit complete and shows defect on this particular area.
AVERAGE HOLIDAY IS NOT MORE THAN 2 IN 300 CM LENGTH OF STEEL.
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