The objective of this study is to evaluate concrete compressive strength with inclusion of Local Prepackaged Polymer-Modified Cementitious Mortar (PPMM) as a new modifier. 18 ordinary Portland concrete (OPC) cubes size 100 mm were prepared and cured according to ASTM C192 and a total of 180 polymer-modified concrete (PMC) cubes 100 mm size were prepared and cured according to JIS A 1171:2000 and JIS A 1171:2000 modified. The inclusion of PPM varies from 5% to 25%. From this research, the compressive strength of PMC produce has significantly increase compare to OPC. The PMC specimens which being cured according to JIS A 1171:2000 modified has recorded the maximum strength
