Sustainable concrete for the urban environment: A proposal to increase fly ash use in concrete

Sustainable concrete described as concrete incorporating by-products or waste materials is not a new topic. In fact, published research on the use of fly ash, as a replacement for cement in concrete dates back to the 1930s. Additionally, a considerable amount of research supports the use of sustainable concrete in pavements and/or structural components with beneficial results pertaining to reduction in CO₂ emissions, reduction in cost, and achievements in strength and durability. Despite positive research, achieving a more permanent use of sustainable concrete in street and highway projects may require the advocacy for increased utilization of fly ash concrete. This paper argues that increased use of fly ash concrete can occur through continuing fly ash concrete research, motivating public policy efforts and, and furthering technology transfer. Additionally these strategies could contribute to a more committed application of sustainable concrete in street and highway projects.