Abstract
Improvement the quality of asphalt for pavement construction is practical to prolong lifetime of roads. Polymer Modified Asphalt or PMA is one of such improvement by mixing polymers in asphalt. Natural rubber is an interested polymer that can be efficiently used. The distingue quality of natural rubber is its’ high stability, elasticity, and fatigue resistance. The aim of the study is to find the appropriate ratio of asphalt and rubber, which can achieve specifications required.