Concrete pavements has a significant importance for traffic flow. Undesirable cracks can be occurred in pavements by alkali silica reaction [ASR]. Therefore, in many parts of the world, precautions must be taken to avoid excessive expansion due to alkali-silica reactivity in concrete pavements. In this study, an intensive research has been conducted by using literature survey. Additionally, it includes an overview of the nature of ASR, the measure values to prevent deleterious reactions, and recommendations for evaluation and repairing of existing structures. As a result, each reducing method has different effects on ASR. Ambient conditions, ratios of concrete mixture, material types have important roles in ASR. Furthermore, it has been determined that cracks occurred in the concrete due to ASR can be prevented by not only chemical but also mechanical effects. Additionally, for this study some tests were made and results were compared the effects of slag and harmless aggregate on mitigating ASR. Five different conditions were used in the tests and mitigating effects for 3, 7 and 14 days were measured. The results were compared and a suitable condition was advised. Additionally, it was founded that different aggregate types can have different mitigating effect equations.