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The research assessed and examined the mechanical properties of the Soil Cement Interlocking brick (SCI) to provide the information for the possible and appropriate development and revision of the (SCI) brick due to the substantial benefits which can be obtained by improving these sorts of bricks.Therefore, drastic efforts and accurate attention were paid precisely on the laboratory tests.Some of the laboratory investigation on (SCI) bricks were conducted in conjunction with the use of various masonry standards to evaluate the Compressive Strength, Dimensional Tolerance,Water Absorption, Initial Rate of Suction and Modulus of Rapture. Results illustrated that the water absorption for (SCI) brick ranged from (13.566 %-17.045%),the Initial Rate of Suction ranged from (1.746-3.573) kg/m2,the compressive strength on the other hand fell in range between (7.733-12.33)N/mm2 for (SCI)bricks without mortar, whereas the compressive strength for (SCI)bricks filled with mortar ranged from (12.406-15.098)N\mm2 and Modulus of Rapture was found to be to ranged between (0.004-0.023)Pa for (SCI) bricks without mortar,whereas, Modulus o