The research aims to assess mortar resistance to high temperature using palm sugar as an additive. The study was conducted through incorporating palm sugar with doses of 0%, 0.1%, 0.3% and 0.5% by cement weight. Mortar specimens with size of 50 x 50 x 50 mm were cast and cured at room temperature for 28 days. Setting time for all specimens with and without palm sugar additive were conducted. Th…