Accession Number:

ADA171892

Title:

Alkali-Silica Reaction in Concrete from Fontana Dam, North Carolina, Tennessee Valley Authority.

Descriptive Note:

Final rept.,

Corporate Author:

ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS STRUCTURES LAB

Personal Author(s):

• Buck,Alan D.
• Mather,Katharine

Report Date:

1986-09-01

Pagination or Media Count:

32.0

Abstract:

In 1973, the TVA requested petrographic examination of several concrete cores from Fontana Dam located in North Carolina to determine whether an alkali-silica reaction had occurred. A petrographic examination was made, and the results of it showed that there was evidence of alkali-silica reaction. While the evidence of reaction was conventional gel, rims on aggregate particles, cracks, the type of aggregate was not variously described as quartzite or feldspathic muscovite schist or metamorphic subgraywacke and another variety as schist or phyllite, was probably due to the presence of large amounts of strained quartz.

Descriptors:

• *CONCRETE
• *GEOCHEMISTRY
• CRACKS
• REACTIVITIES
• QUARTZ
• CHEMICAL REACTIONS
• EXPANSION
• NORTH CAROLINA
• CONSTRUCTION MATERIALS
• ALKALINITY
• DAMS
• SILICA GELS
• PETROGRAPHY
• MICA
• METAMORPHIC ROCK
• QUARTZITE

Subject Categories:

• Geology, Geochemistry and Mineralogy
• Ceramics, Refractories and Glass
• Civil Engineering
• Construction Equipment, Materials and Supplies

Distribution Statement:

APPROVED FOR PUBLIC RELEASE