Khelil, N. , Kahil, A. , Boukais, S. (2019), 'Mechanical Contribution of Silica Fume and Hydrated Lime Addition in Mortars Assessed by Ultrasonic Pulse Velocity Tests ', World Academy of Science, Engineering and Technology, Open Science Index 155, International Journal of Structural and Construction Engineering, 13(11), 677 - 681.