Interim report no. 6. corrosion and creep testing of coated reinforcing bars in concrete :

Abstract

The possibilities of protecting steel reinforcing bars embedded in concrete from corrosion by using organic barrier-type coatings are being investigated in this project. This corrosion is accelerated by the chloride ions of the two most commonly used deicing materials, calcium chloride and sodium chloride. In this report, corrosion studies carried out on coated reinforcing bars embedded in concrete are discussed. Methods of instrumenting creep-test specimens are also explained. The electrical potentials of coated reinforcing bars are not reliable indicators of the corrosion state of the steel bars. The electrical resistances of the coating films are more reliable indicators of the performance of a coating material than the electrical potential measurements.

Interim report no. 7. chemical resistance and physical durability testing of coating materials :

“…The test was performed at 25°C. The fabrication of test specimens and the method of testing have been previously described [5].…”

“…The fabrication of test specimens and preparation of the test apparatus have been covered in a previous report [5].…”

“…The tensile stress in the rebar for each creep specimen is listed in Strain gages, with small intrinsic creep properties, and measurements of the changes in length of the compressed springs are being used for monitoring tensile loads in the rebars [5]. Both the free and loaded-end slip of the reinforcing bars embedded in the concrete prisms are being measured with dial gages.…”