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Thank you for your comments. Rebound Hammer test ek concrete ka non-destructive testing method hai, jisse hum concrete ki compressive strength ka fast indication pa sakte hain.
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?
