Speaking like someone who has run a construction operation before, Juan Carlos Terroba complains about how wasteful and time-consuming a project can be. “Look at how much concrete is tested,” says the former Mexico-based concrete producer. “It’s ridiculous. It goes way beyond your normal quality-control standards.” Photo: Icrete/Joelwoolhead Batch process & fits more aggregate into voids for a ‘fluffier’ long-life mix. Related Links: America May Gain from Materials Designed To Stretch Your Stimulus Dollars Asphalt ‘Armor’ Is Wearing Well Long-Life Composite Bar Receives Second Chance Cylindrical Solar Cells Set Broad New Energy Curve Terroba recently left his family’s large, ready-mix
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.