Accession Number:

AD0752879

Title:

Durability of Prestressed Concrete Beams,

Descriptive Note:

Corporate Author:

ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS

Personal Author(s):

• Roshore,Edwin C.

Report Date:

1964-07-01

Pagination or Media Count:

28.0

Abstract:

The durability of pretensioned and posttensioned concrete beams is being studied using laboratory-prepared beam specimens. A group of beams containing pretensioned strands, some made with air-entrained concrete and others with nonair-entrained concrete, was exposed to natural weathering. It is concluded a Concrete for prestressed structural elements that are to be exposed to freezing and thawing in a moist condition should contain entrained air. b The concrete cover over reinforcing should be greater than 34 in. when exposure to seawater is involved. c Epoxy concrete is superior to portland cement concrete for end protection. Flush anchorages appear to be more effectively protected than external anchorages. Author

Descriptors:

• *BEAMS(STRUCTURAL)
• *REINFORCED CONCRETE
• STRUCTURAL PROPERTIES
• BEAMS(STRUCTURAL)
• CONSTRUCTION MATERIALS
• FREEZING
• SULFATES
• SEA WATER
• FAILURE(MECHANICS)

Subject Categories:

• Structural Engineering and Building Technology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE