Metakaolin is produced by heat-treating kaolin, a natural, finely divided, aluminosiliceous mineral, which is found in abundance in North America in Georgia, South Carolina, and Saskatchewan. Heating to 1200 to 1650°F (650-900°C) alters its structure, producing a highly reactive supplementary
Curing, Shrinkage, and Cracking of Ternary Concrete Mixes
Tommy E. Nantung, Indiana Department of Transportation Many state transportation agencies are exploring ways to increase the service life of concrete bridge decks. In many cases, bridge deck replacement is needed while the pavement leading to the bridge is still
Read More >>Curing, Shrinkage, and Cracking of Ternary Concrete Mixes
High Strength Concrete for the Hoosick River Crossing
Ben Cota, J.P. Carrara & Sons, Inc. The new four-span Hoosick River Crossing carries Route 7 across the Hoosick River in the town of Hoosick, Rensselaer County, in the northeast corner of New York State. The new bridge replaced an
Read More >>High Strength Concrete for the Hoosick River Crossing
Field-Cast UHPC Connections for Modular Bridge Deck Elements
Ben Graybeal, Federal Highway Administration The use of modular bridge deck components has the potential to produce very high quality and extremely durable concrete bridge decks. Advanced cementitious composite materials, whose mechanical and durability properties far exceed those of conventional
Read More >>Field-Cast UHPC Connections for Modular Bridge Deck Elements
HPC for Route 36 Highlands Bridge, NJ
Chester Kolota, Federal Highway Administration The Route 36 Highlands Bridge in Monmouth County, NJ, replaces the existing bridge, a 1240-ft (378-m) long, low-level, double-leaf bascule bridge that connects the boroughs of Highlands and Sea Bright. The bridge is part of