Portland cement , Groundwater , Cement –Sand mortar ,Cement-Sand-Polymer mortar, Polymer

Abstract

This research includes study of the effect of groundwater on Portland cement used in making of concrete which is enter as major part in structures by making samples of cement- polymer mortar with mix proportions ( cement: sand : polymer ) (1: 3:0.05 ) , (1 : 3 : 0.07 ) and (1: 3 : 0.1 ) and normal cement mortar ( cement : sand ) (1:3). By studying the compressive strength , absorption and ultra-sound velocity. The results refer to increasing of compressive strength and ultra-sound velocity and decreasing in absorption with increasing of polymer ratio with respect to normal cement mortar at ages 7 , 14 ,28 day.