T HE ULTRASONIC velocity, the electrical resistivity and the compressive strength of plain (N), accelerating admixture (A), high range water reducing admixture (H), and retarder admixture (R) concrete samples of 0.35, 0.42, 0.55 and 0.6 w/c ratios were measured, The effect of concrete age on the samples with 0.42 water to cement (w/c) ratio were studied. The results show that, the ultrasonic velocity, the electrical resistivity and the compressive strength are inversely proportional to the w/c ratio for all samples and at the same w/c ratio the values of these parameters for the high range water reducing admixture (H) concrete, are relatively higher than that of the accelerating admixture (A) concrete then the Plain (N) concrete, then, retarder admixture (R) concrete. For the samples with different ages, the results show that, the ultrasonic velocity, the electrical resistivity and the compressive strength increase rapidly at first 7 days, after that, the increment slows down significantly after 28 day, and at the same age, the values of theses parameters of the accelerating admixture concrete sample (A4) are higher than that of the other samples {high range water reducing concrete (H4), plain concrete (N4)-retarded concrete (R4)} The destructive compressive strength was correlated to the nondestructive ultrasonic velocity and electrical resistivity measurements. Linear relationships between the compressive strength and either the ultrasonic velocity or the electrical resistivity were obtained. The results were attributed to the hardening and the microstructure development in the different concrete samples Keyword: Sultrasonic velocity, Electrical resistivity compressive strength , w/c ratio-plain concrete , Accelerating admixture, High range water reducing admixture , Retarder admixture nondestructive testing, chemical admixture. reinforcing steel skeleton to provide a durable structure. PCC by itself does not possess all the required properties. Hence, admixtures are widely used in the production of concrete to make it suitable for different conditions. Admixtures are natural (minerals) or manufactured chemicals which are added to the concrete before or during mixing.