Sandman
Bronze Member
I have this discussion on most every project and would like to know how others deal with this.
Ready-mix concrete is delivered from the batch plant per approved mix design and there will be some placements where a pump truck is necessary to convey the concrete; 1) Is it correct to sample from the truck chute or at the point of discharge (the end of the pump hose), 2) Why? and 3) How can a correct sample be taken per ASTM C172 from the end of a pump hose?
Ready-mix concrete is delivered from the batch plant per approved mix design and there will be some placements where a pump truck is necessary to convey the concrete; 1) Is it correct to sample from the truck chute or at the point of discharge (the end of the pump hose), 2) Why? and 3) How can a correct sample be taken per ASTM C172 from the end of a pump hose?