Corrosion Performance Tests for Reinforcing Steel in Concrete
Author(s):
D. Trejo, C. Halmen, K.F. Reinschmidt
Publication Date:
April 2009
Abstract:
This project summary report summarizes the research performed in Texas Department of Transportation (TxDOT) Project 0-4825. Corrosion of steel reinforcement occurs throughout many structures in Texas and has received significant interest at the state and national levels. With the large number of new corrosion-resistant products being introduced to the market and the large number of requests to use these new materials, state highway agencies need methods and procedures that can quickly and economically assess these new materials. Researchers evaluated four accelerated test procedures and compared the complexity, costs, and outcome of the results from each accelerated test with those of the standard test procedure commonly used to assess new materials, ASTM G109. The research team found that the rapid minimacrocell (MM) test procedure is relatively simple and economical to perform. They recommend that this test method be used to compare the performance of uncoated reinforcement and different constituent materials. This method is not recommended for assessing the performance of galvanized or epoxy reinforcement. If a quantitative assessment of materials is needed, the researchers recommend the Concrete Corrosion Inhibitors Association (CCIA) test or the accelerated chloride threshold (ACT) test. Of the test methods assessed, no accelerated test methods could be recommended for assessing the performance of epoxy-coated reinforcement. The modified G109 test can be used for assessing the performance of galvanized reinforcement.
Report Number:
0-4825-S
Electronic Link(s):
Document/Product
http://library.ctr.utexas.edu/hostedpdfs/txdot/psr/4825.pdf
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