Bhaiya any kind of means class of bricks not having. Only we have to follow on Class Designation as Per IS 1077 : 1992 & IS 3495 : 2019. Okay. If CD more than 12.5, the water absorption should not be more than 12 % and under 12.5 CD should not be more than 20 %. As per IS 1077 : 1992. Please refer IS Codes properly.
You can add flyash in lower grade concrete,first design the grade, decide the % after trial and error method. It will take more time to get harden the concrete , u can use 20-30% as per my experience, flyash help in durability not too much in strength in 28days.
@@qaqcguide5613 Thanks for your reply. How much more days, how to find out and if we use m25 with 25% fly ash, normally a column is opened in 24-48 hrs, when to open fly ash column and after 3-4 days, can we start work on plinth beam n doc ? Other than this if we use fly ash n marble dust in wall cementing, what will be its impact ? Any Indian book or any video on the above questions?
IS-12894 specifications of fly ash bricks IS-3495 part-1 to 4 for testing Lot size upto 10000 bricks 5 no of sample for competitive testing Lot size 10001 to 35000 bricks 10 no of sample for competitive testing Lot size 35001 to 50000 bricks 15 no of sample for competitive testing Lot size upto 2000 brick (20 nos sampling) Lot size 2001 to 10000 brick (40 nos sampling) Lot size 10001-35000 brick (60 nos sampling) Lot size 35001 to 50000 brick (80 nos sampling)
