Ordinary Portland cement concrete (OPC) is the world’s most consumed commodity after water. However, the production of cement is a major contributor to global anthropogenic CO₂ emissions. In recent years, ultrahigh performance concrete (UHPC) has emerged as a strong contender to replace OPC in diverse applications. UHPC has much higher mechanical strength, and thus less material is used in a structural member to resist the same load. Moreover, it has a much longer service life, reducing the long-term need for repair and replacement of aging civil infrastructure. Thus, UHPC can enhance the sustainability of cement and concrete. However, there is currently no robust tool to estimate the sustainability benefits of UHPC. This task is challenging considering that such benefits can only be captured over the long-term since variables, such as population growth and cement demand per capita, become more uncertain. In addition, the problem of CO₂ emissions from cement and concrete is a complex system affected by time-dependent feedback. The System Dynamics (SD) method has specifically been developed for modeling such complex systems. Accordingly, a SD model was developed in this study to test various pertinent policy scenarios. It is shown that UHPC can reduce cumulative CO₂ emissions of cement and concrete—over the studied simulation period—by more than 17%. If supplementary cementitious materials are further deployed in UHPC and new technologies permit reducing the carbon footprint per unit mass of cement, emission savings can become more substantial. The model offers a flexible framework where the user controls various inputs and can extend the model to account for new data, without the need for reconstruction of the entire model.

This study demonstrates how to implement a novel system dynamics (SD) strategic water utility management and financial planning tool. Using data from several local water utilities in Ontario, Canada, the tool is run to simulate 20 years to investigate: (1) long‐term fee‐hike rates required for system financial sustainability; (2) service and financial performance metrics for pay‐as‐you‐go, borrowing, and capital reserving strategies; and (3) consumer affordability as a result of water use charges. For the case study, reserving cash and allowing water fees to increase by up to 7% per year are found to be the best financing strategy to eliminate infrastructure backlog/deficit. The study demonstrates the benefits of an SD model for developing and preparing strategic and tactical asset management, water conservation, and financial plans. The SD model parameterization and implementation for the demonstration case study can be helpful to other utilities in adapting the model to their own specific circumstances.