Professor Jay Sanjayan is the Director of Swinburnes Centre for Sustainable Infrastructure and Professor of Concrete Structures. Prof Sanjayan has been recognised by Concrete Institute of Australia for his current projects including 3D printing of concrete, low carbon concretes, geopolymer concretes, use of phase change materials in construction and monitoring the performance of geopolymer concrete in the field. Kulasegaram Sanchayan talks to Prof Jay Sanjayan.