Page 77 - GRIHA Manual Volume V - Introduction to National Rating System
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70 Griha Manual: Volume 5
15.2.4 Certificate from the architect specifying overall replacement of cement in the rC, pre-
cast building blocks plaster, and masonry in specified format (in prescribed certificate
format).
15.3 Appraisal (maximum points-6)
15.3.1 minimum 15% replacement of Portland cement with fly ash by weight of cement
used in structural concrete, as per clause 15.2.1 – 1 point (additional 1 point if more than
30%).
15.3.2 minimum 40% utilization of fly ash by volume of materials, for 100% load bearing and
non-load bearing walls, as per clause 15.2.2 – 2 points.
15.3.3 Certify minimum 30% replacement of oPC with fly ash in plaster/masonry mortar, as
per clause 15.2.3 – 2 points.
Evaluation procedure
Appraisal 15.3.1
minimum 15% replacement of Portland cement with fly ash by weight of cement used in structural
concrete, as per clause 15.2.1 – points 1 (additional 1 point if more than 30%).
Required documentation
1. Calculations demonstrating use of fly ash in structural concrete as a replacement for cement.
2. manufacturer brochure, clearly stating the use of fly ash in cement and the percentage
replacement of cement by fly ash by weight.
3. a test certificate from an independent laboratory for demonstrating compliance with the
necessary strength requirements as per biS.
4. Certificate from the structural consultant in case additional fly ash is added to the design
mix in order to achieve more percentage replacement of fly ash. the boq/purchase order
of the additional fly ash should be attached as well.
Review checklist
1. Check that the percentage of fly ash as per the manufacture certificate and that used in the
calculations, should be the same.
2. Check the calculations for accuracy.
3. Check the design mix if specified and review the purchase order for additional fly ash.
Possible errors
1. the quantities of fly ash used in the calculations might not correspond with the manufacture
certificate and the purchase order.
2. the number of PPC bags purchased in the purchase order should correspond with the
calculation tables.
3. the project might try to claim for additional points without using the additional fly ash as
demonstrated in the example below. in such cases, the additional point is not awarded.
15.2.4 Certificate from the architect specifying overall replacement of cement in the rC, pre-
cast building blocks plaster, and masonry in specified format (in prescribed certificate
format).
15.3 Appraisal (maximum points-6)
15.3.1 minimum 15% replacement of Portland cement with fly ash by weight of cement
used in structural concrete, as per clause 15.2.1 – 1 point (additional 1 point if more than
30%).
15.3.2 minimum 40% utilization of fly ash by volume of materials, for 100% load bearing and
non-load bearing walls, as per clause 15.2.2 – 2 points.
15.3.3 Certify minimum 30% replacement of oPC with fly ash in plaster/masonry mortar, as
per clause 15.2.3 – 2 points.
Evaluation procedure
Appraisal 15.3.1
minimum 15% replacement of Portland cement with fly ash by weight of cement used in structural
concrete, as per clause 15.2.1 – points 1 (additional 1 point if more than 30%).
Required documentation
1. Calculations demonstrating use of fly ash in structural concrete as a replacement for cement.
2. manufacturer brochure, clearly stating the use of fly ash in cement and the percentage
replacement of cement by fly ash by weight.
3. a test certificate from an independent laboratory for demonstrating compliance with the
necessary strength requirements as per biS.
4. Certificate from the structural consultant in case additional fly ash is added to the design
mix in order to achieve more percentage replacement of fly ash. the boq/purchase order
of the additional fly ash should be attached as well.
Review checklist
1. Check that the percentage of fly ash as per the manufacture certificate and that used in the
calculations, should be the same.
2. Check the calculations for accuracy.
3. Check the design mix if specified and review the purchase order for additional fly ash.
Possible errors
1. the quantities of fly ash used in the calculations might not correspond with the manufacture
certificate and the purchase order.
2. the number of PPC bags purchased in the purchase order should correspond with the
calculation tables.
3. the project might try to claim for additional points without using the additional fly ash as
demonstrated in the example below. in such cases, the additional point is not awarded.
