<p><p><figure id='attachment_1478' style='max-width:662px' class='caption alignnone'><img class="wp-image-1478 size-full" src="https://www.geoinstitute.org/sites/default/files/geotech-tools-uploads/…; alt="Photograph of a Landpac 25-kJ three sided impact roller." width="662" height="437" /><figcaption class='caption-text'> Landpac 25-kJ three-sided impact roller. Photograph from www.landpac.co.za, courtesy of Land Pac®</figcaption></figure></p><p>High energy impact rollers (IR) transfer high-impact compaction energy to materials using non-circular shaped tow-behind solid steel molds. This technique is suitable for a wide variety of materials including clays, silts, sands, rocks/boulders, dredged fill, and industrial waste. Compaction improvement depth can be as much as 15 feet and generally up to 7 feet. This technique is primarily applicable to stabilization of the working platform but may also be used on materials installed in new embankments and embankment widening projects.</p><p>