A Progress on the Application of Nanotechnology in Concrete (ACI Fall 2023, Boston, MA) Colloidal silica has been gaining traction in the concrete industry to improve durability and extend concrete service-life. The following session will focus on the current and future specifications to guide users in the optimal method to utilize this cutting-edge technology. Topics will cover the current colloidal silica market and usage, the state of the new specifications for optimal usage, and the future for colloidal silica widespread adoption in the concrete industry.

Excellence in Concrete Construction Awards - Project Winner Presentation (ACI Fall 2023, Boston, MA) The MacLeod Building Renewal at the University of British Columbia—situated in Musqueam Traditional Territory, Vancouver, Canada—transforms a poorly performing, existing 1963 building nearing the end of its service life into a showcase of 21st Century learning space, sustainability, and seismic resilience. The most comprehensive retrofit completed at UBC to date, the project incorporates benchmark-setting seismic upgrades to the existing concrete structure, replacement of the existing envelope, new interior layout and finishes, and upgraded mechanical and electrical systems. The public face of the project is a new high-performance envelope featuring sculptural, locally fabricated pre-cast concrete panels with integrated solar shading. Concrete is the primary building material for seismic upgrades designed to exceed Building Code requirements and prioritize safe and efficient reoccupation following a major earthquake. In combination, these strategies achieve an aesthetically expressive, highly resilient and energy-efficient building.