This book deals about applications of Nuclear Density Gauge tool and also significant comparison with conventional method such as a sand replacement method, core cutter and LWD for compaction measure. It is helpful for site engineer as well as students; whom are researching in Pavement field and Geo-technical field and also for contractor for rapid QA/QC work. To measure in-situ densities is a time consuming job, Nuclear Density Gauge tool measure within minutes and also evaluate moisture content. Nuclear Density Gauge tool significantly correlate with convention method, therefore it is recommended for QA/ QC work. This book helps researchers as well as student and site engineers.