ASTM G109-07 (R2013) PDF Download

The ASTM G109-07 (R2013) standard provides a reliable means for predicting the inhibiting or corrosive properties of admixtures to be used in concrete. It is particularly useful for development studies of corrosion inhibitors in concrete.

The test method involves examining the corrosion of metals in concrete to evaluate the effects of chemical admixtures. It is specifically designed to assess the ability of materials to inhibit chloride-induced corrosion of steel in concrete, as well as to determine the corrosivity of admixtures in a chloride environment.

It should be noted that while this test method has shown good agreement with corrosion damage observed on embedded steel, it may not accurately rank the performance of different corrosion inhibitors in certain conditions. For instance, it may not be suitable for concrete covers over the steel less than 40 mm (1.5 in.) or water-to-cement ratios above 0.45. The mixture proportions and cover over the steel are chosen to accelerate chloride ingress, and some inhibitors may affect this process, leading to different results from what would be expected in actual use. Therefore, caution should be exercised when interpreting the results, especially in these situations.