United States Department of Transportation
i
Corrosion performance tests for reinforcing steel in concrete : test procedures.
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2009-09-01
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[PDF-343.25 KB]
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Alternative Title:Project title: Corrosion performance tests for reinforcing steel in concrete
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Edition:Product; Sept. 2003-Aug. 2008.
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Abstract:The existing test method to assess the corrosion performance of reinforcing steel embedded in concrete, mainly
ASTM G109, is labor intensive, time consuming, slow to provide comparative results, and often expensive.
However, corrosion of reinforcement is a major challenge to the performance and long-term durability of
infrastructure systems. Improvements in the corrosion performance of materials could add significant value to
the infrastructure. New procedures and test methods are needed to assess the corrosion performance of
potentially value-adding materials. This study evaluated four accelerated test procedures: the mini-macrocell
(MM) test, the concrete chloride ion assessment (CCIA) test (also referred to as the concrete corrosion
inhibitor association test), the accelerated chloride threshold (ACT) test, and the modified G109 test. Results
from the accelerated tests were compared with results from the standard ASTM G109 results. The rapid MM
test proved to be relatively simple, and researchers recommend that it be used to assess the relative
performance of several material systems. The CCIA and ACT tests are recommended only when the critical
chloride threshold of a reinforced system is needed. These tests are more complex and expensive to perform
than the MM test. This product provides the procedures for performing these tests. The modified G109 test
can continue to be used, but test durations are still relatively long.
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