John Horn, Volkert Construction Services In August 2005, Hurricane Katrina decimated the Gulf Coast and nearly destroyed the 5.5-mile (8.9-km) long twin-span, I-10 bridges that connect South Mississippi with New Orleans across Lake Pontchartrain. The existing structures were quickly repaired
AASHTO Adopts Recommended Practice on Alkali-Silica Reactivity
Gina Ahlstrom, Federal Highway Administration In August 2008, a task group was formed under the American Association of State Highway and Transportation Officials (AASHTO) Subcommittee on Materials to review current specifications pertaining to alkali-silica reactivity (ASR). The task group was
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Letter to the Editor
The following letter was received concerning the article titled “Measurement of Air Content in Concrete,” which was published in HPC Bridge Views, Issue No. 61, May/June 2010. EditorThe article describes various methods for measuring the air content of concrete. I think
HPC for the Angeles Crest Bridge 1
Jose Higareda, California Department of Transportation The Angeles Crest Bridge 1 is located along scenic Route 2 northwest of the city of Los Angeles within the Angeles National Forest, California. The 208-ft (63.4-m) long single span, precast, prestressed concrete, spliced
Question & Answer
Question: If the concrete in my precast, prestressed concrete bridge beams has achieved the specified compressive strength before the specified age, is there any reason not to transport and erect them? Answer: For prestressed concrete bridge beams, the Engineer specifies