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Dear Friends, Thank you very much for the kind reply ... hope this thread was helpful. I have visit a laboratory which doing concrete tests in my city, they told me that sampling frequency to be as follows; For raft foundation: For >50m3 ==> 3 cubic for 7 days test ==> 12 cubic...

Blocjs us the most familier un my country ^_^

Thank you very much for the valuable infirmation. But, to sumurize this, can anyone advice me how many cubic block of 15x15cm i should test for the 1200m3 if it will be tested in one batch?

Hi, I kindly would like to ask about concrete sampling for compressive strength, I have to cast 1200 m3 in one day as one batch to pour a water treatment sedimentation tank ... how many 15x15cm cubic sample I should cast to represent the 1200 m3? I will highly appreciate if you kindly inform...