<p><p><strong>Reference(s):</strong></p><p><em>Ashford et al. (2004)<br>Fordham and Purcell (1991)<br>Ghandi et al. (1999)<br>Gohl et al. (2000)<br>Narin van Court and Mitchell (1994a, 1994b, 1995b)<br>Narsilio et al. (2009)<br>Solymar (1984)</em></p><p><strong>Method Summary</strong></p><p>Cone Penetration Tests (CPTs) should be performed before and after the test and production blasts to ensure that an increase in relative density, as measured by an appropriate increase in cone tip resistance, has occurred. A time lapse between the end of the blasting densification program and the cone penetration testing should be allowed because experience has shown that the penetration resistance of the soil usually increases with time.</p><p><strong>Accuracy and Precision</strong></p><p>CPTs provide good correlation with cohesionless soil density.</p><p><strong>Adequacy of Coverage</strong></p><p>CPTs can be performed at locations specified by the engineer.</p><p><strong>Implementation Requirements </strong></p><p>CPTs are commonly used in geotechnical investigations and are relatively inexpensive and easy to perform.</p><p><strong>General Comments</strong></p><p>CPTs can be used in any blasting densification program, provided the soil being densified does not contain excessive amounts of gravel or cobbles.</p></p>