This study aims to study the compressive strength and ultrasonic pulse velocity of mortar which contains epoxy composed of two parts: resin and hardener, .at 5, 10, 15, and 20 (wt. %) of epoxy content at different ages (7, 28) days. Where the results showed an increase in the value of compressive strength gradually and the highest at 15% of epoxy content (64.6, and 69.4 MPa) at (7, 28) day, respectively.
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