The main objective of this study was to evaluate the suitability of recycled asphalt aggregate with crushed stone aggregate in hot mix asphalt production by using an experimental type of investigation. To attain this study, Non-probable sampling techniques were adopted to collect a sample. The engineering properties of the extracted Reclaimed asphalt pavement aggregate (RAPA) and the freshly crushed stone aggregate (CSA) were investigated based on standard specifications before further starting the Marshall Mix design processing. Then, the Marshall Stability test was conducted on CSA with three different aggregate gradation sizes 5.0%, 5.5%, and 6.0% by weight of aggregates and with five different bitumen content 4.0%, 4.5%, 5.0%, 5.5% and 6.0% by weight of the total mix. Depending on the selected aggregate gradation, the Marshall Stability test was conducted for reclaimed asphalt pavement aggregate with a replacement rate of 5.0%, 15%, 25%, 35%, 45%, 55%, and 65% by weight of CSA to determine its optimum bitumen content (OBC) according to National Asphalt Pavement Association method (NAPAM). In this, study a total of 64 mix designs and 190 specimens were prepared based on specifications. Based on this, the Marshall Stability and Moisture Susceptibility test with 3-trials, and additional 2-trials were conducted for the rutting test. From 190 specimens, 45 were for the control mix design, 105 were for partial replacement proportion, 36 were for Moisture Susceptibility and 4 were for the Rutting test conducted. Based on the Marshall test results and their performance tests such as Moisture Susceptibility and rutting test were considered up to the maximum allowable replacement percentage and their experimental results were compared with the standard specifications. The optimum bitumen content result obtained in percent was 5.1, 5.04, 4.98, 4.87, 4.81, 4.74, 4.67, and 4.53 for 0 % (control), 5.0%, 15%, 25%, 35%, 45%, 55%, and 65%, respectively. The experimental test result of the Tensile Strength Ratio, proportional rut depth and mean rut depth on 45% RAPA replacement percentage was 85.42%, 4.48 %, and 2.24 mm respectively. Finally, based on this investigation, the test result obtained from the marshal stability and the performance tests indicates that up to a maximum of 45% replacement of aggregate by a reclaimed asphalt pavement aggregate in hot mix asphalt production satisfies the required standard specifications. [ABSTRACT FROM AUTHOR]