How many compressive test samples are required for epoxy grouts to form a "valid test"? ASTM C579 is the standard to use for testing epoxy grout, but all it says it to create 6 samples. It's not clear to me if that means a minimum of 6 samples must all be tested at the same age to form a valid...
I'm working on a project with a very large reinforced concrete footing. The minimum clear cover on top of the foundation was specified to be 2 inches, but in some areas of the foundation the contractor placed the concrete unevenly and only achieved as little as 1 inch of clear cover. The...
