Brackish water has a high salinity level that provides a salty taste to the water. Salinity is the saltiness level or levels of dissolved salts in water. In the casting process-the environment in remote areas in the province of Indragiri Hilir, alternative use of brackish water as a concrete mixer is often done in order to produce a concrete construction in accordance with the needs of the field. In this study will be reviewed compressive strength of concrete using brackish water as a concrete

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... ixer. Testing by comparing the compressive strength of concrete using clean water and brackish water taken from the river Indragiri Indragiri Hilir. The method used is SNI 03-2834-2000. Cylindrical test specimen diameter of 150 mm and a height of 300 mm. Testing of materials and planning the examination of concrete (mix design), quality of concrete fc '15 MPa with a mixed composition of water, 100% brackish water, brackish water 95% plus 5% water, 90% brackish water plus 10% water, 85 % brackish water plus 15% water and 80% plus 20% of brackish water.The results showed that the compressive strength of concrete using clean water of 25.671 MPa, 100% brackish water mixture of 27.772 MPa, brackish water mixture 95% of 27.137 MPa, brackish water mixture 90% of 25.232 MPa, brackish water mixture 85% of 25.186 MPa and brackish water mixture 80% of 24.725 MPa. Compressive strength of concrete using a mixture of brackish water of 100% and 95% exceed the compressive strength of concrete using a mixture of clean water. For brackish water mixture 90%, 85% and 80%, the compressive strength of the concrete is still above the limit SNI 03-2834-2000 for quality concrete fc '15 MPa at 22 MPa. It shows that the concrete mix using brackish water as a concrete mixer may be used in non-structural concrete mix (do not use concrete reinforcing steel).