Astm D4633

The most famous application is correcting SPT N-values. The raw N-value (blows per foot) is adjusted to an energy-corrected value, N_60 , which represents the blow count for a hammer delivering 60% of the theoretical potential energy.

The execution of ASTM D4633 requires a specialized piece of equipment: the Seismic Piezocone Penetrometer. This instrument is an enhancement of the standard Cone Penetration Test (CPT) equipment. The device consists of: astm d4633

When bidding a job or accepting subcontractor data, you can demand energy measurements to ensure all rigs produce comparable results. The most famous application is correcting SPT N-values