The Properties of Produced Concrete by Using Fine Aggregate with Sulphate Content Higher Than Iraqi Specification Limits


The sulphate problem in fine aggregate increases with time in Iraq and the construction companies became face a lot of difficulties to find fine aggregate within the specification with regard to sulphate content. This paper studies the possibility of adjusting fine aggregate content in concrete mixes to facilitate using fine aggregate with sulphate content higher than the Iraqi specification limit (0.5%), but the total sulphate content of the mix will be within the specification (I Q S 45, 1984). One reference mix is used in this study with fine aggregate conformed to the specification for sulphate content ,and three other mixes are used with different fine aggregate content and also different sulphate content .Some tests are conducted for these produced mixes to fined their mechanical properties. This study shows the ability of using fine aggregate with sulphate content up to(2.33%) to produce mixes with a compressive strength ,splitting tensile strength ,and modulus of rapture not less than (80%),(94%), (84%) respectively as compared with the refrence mixe at age of (180) days .