- Author
-
Knab, L. I.
|
Clifton, J. R.
- Title
- Mechanical and Physical Properties of Coquina Stone From the Castillo de San Marcos National Monument.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Sponsor
- National Park Service, Dunwoody, GE
- Report
-
NBSIR 88-3714
January 1988
23 p.
- Distribution
- Available from National Technical Information Service
- Keywords
-
monuments; rock properties; preserving; compressive strength; st. augustine (florida)
- Identifiers
- coquina stone
- Abstract
- Some important mechanical and physical properties of coquina stone, which was used to construct the Castillo de San Marcos National Monument, were determined to aid in the condition assessment of the monument. Mechanical properties determined included compressive strengths under several different testing conditions, including testing wet as compared to dry, and the direction of the applied load relative to the bedding plane orientation. Physical properties determined included water absorption and dry density. The results indicated that the coquina stone has an extremely low compressive strength relative to common building stone. The low compressive strength was believed to be caused, at least in part, by the friable and very porous nature of the coquina stone.