DAVID Ball, chairman of the Bar Hill-based David Ball Group plc, has been elected president of the Concrete Society, taking over the role from Professor Ravindra Dhir. Mr Ball has been a member of the Concrete Society for 15 years and a director since 2005. He also heads the societys international development group. He said: I feel especially pleased as a representative of the manufacturing sector to be entrusted with the role and to follow an illustrious line of consulting engineers and academics who have steered the society so ably as past presidents. Mr Ball has been a passionate advocate of concrete engineering for over 40 years during a career dedicated to advancing materials technology for construction and industrial applications.