<p><p><strong>References:<br></strong><em>Jumo and Geldenhuys (2004)<br>Landpac (2008a)</em></p><p><strong>Method Summary</strong></p><p>The CIR mapping procedure involves continuously recording the deceleration measurements (g’s) of the IR drum using accelerometer(s) instrumented in the drum, and mapping the results in an on-board computer using GPS. This technology is relatively new and proprietary.

<p><p><strong>Reference(s):<br></strong><em>Kelly (2000)<br>Landpac (2008a)<br>Pinrad (1999, 2001)</em></p><p>The procedure involves selecting a representative test section of the project area and conducting a compaction field trial in order to obtain critical soil engineering parameters (i.e., density, modulus, strength, permeability).

<p><p><figure id='attachment_3465' style='max-width:496px' class='caption aligncenter'><img class="wp-image-3465 size-full" src="https://www.geoinstitute.org/sites/default/files/geotech-tools-uploads/…; alt="Photographs of the high energy impact roller compactors used on the New Doha International Airport." width="496" height="395" /><figcaption class='caption-text'> Compacto

<p><p><strong>References:<br></strong><em>Avalle and Grounds (2004)<br>Jumo and Geldenhuys (2004)</em></p><p><strong>Method Summary</strong></p><p>Light Weight Deflectometer (LWD), Falling Weight Deflectometer (FWD), and Clegg hammer tests are included in this category. LWD and FWD tests are performed by obtaining plate deflections under dynamic impulse loading. LWD tests apply relatively lower applied contact stresses (about 0.2 MPa or less) compared to FWD testing (applied contact stresses up to 1.0 MPa).

<p><p><strong>References:<br></strong><em>Avalle(2004b,c)<br>Avalle and Carter (2005)<br>Bouazza and Avalle (2006 a,b)<br>Pinrad (1999, 2001)<br>Landpac (2008b)</em></p><p><strong>Method Summary</strong></p><p>Use of ground elevation change as a QC/QA measure is described in the references listed above. This method provides a simple and yet effective means to assess improvement under IR compaction (Avalle 2004b).

<p><p><strong>References:<br></strong><em>Avalle (2007b)<br>Avalle and Grounds (2004)<br>Bouazza and Avalle (2006a,b)<br>Scott and Suto (2007)</em></p><p><strong>Method Summary</strong></p><p>Geophysical/seismic methods include surface wave testing, cross-hole seismic cones, Ground Penetrating Radar (GPR), and resistivity. Use of surface wave and cross-hole seismic cone testing to assess compaction improvement under IR is described in the references listed above.