Are we ready to accept high-volume fly-ash concrete in cold-weather climates? A number of practitioners in Canada's largest city, Toronto, think so. They are betting that a 50/50 fly-ash-to-portland-cement mix for a four-story 120,000-square-foot computer sciences building on the campus of York University will prove their point.
Like everything old, hydraulic lime mortars are new again, finding a place in historic restorations.
