- Author
-
Struble, L.
|
Waters, N.
- Title
- Tensile Test to Measure Adhesion between Old and New Cement Paste.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Sponsor
- Army Corps of Engineers, Washington, DC
Naval Facilities Engineers Command, Alexandria, VA
Air Force Engineering and Services Center, Tyndall AFB, FL
- Report
-
NBSIR 87-3685
October 1987
32 p.
- Distribution
- Available from National Technical Information Service
- Keywords
-
concretes; cements; tension tests; adhesion; maintenance; bonding strength
- Abstract
- A tensile test has been developed to measure the adhesion of repair material to hardened concrete using specimens of repair material cast between two cylinders of hardened substrate material. Cement paste was used as the model material for both the repair material and the hardened substrate. Aspects of the test procedure that appeared to affect the strength data included the jig used to cut the hardened substrate surface in preparing the composite specimen, the grips used during the tensile test, the crosshead speed, exposure condition during loading, and possibly the age of the repair material.