Using the scoop, fill 1/3 of the cone with the concrete sample. Pro Tip: A good technique is to angle the rod to match the slope ... Concrete and High Strength Mortar. This standard stipulates ...

Obtain a representative concrete sample from the revolving drum ... For 6 by 12 inch molds use a 5/8 inch diameter tamping rod and a 3/8 inch diameter rod for 4 by 8 inch molds.