Testing and Inspection
Pervious concrete has a common strength of 600 pounds per square inch (4,100 kPa) to 1,500 pounds per square inch (10,000 kPa) though strengths up to 4,000 pounds per square inch (28,000 kPa) can be reached. There is no standardized test for compressive strength. Acceptance is based on the unit weight of a sample of poured concrete using the ASTM C1688. An acceptable tolerance for the density is plus or minus 5 pounds (2.3 kg) of the design density. Slump and air content tests are not applicable to pervious concrete because of the unique composition. The designer of a storm water management plan should ensure that the is functioning properly through visual observation of its drainage characteristics prior to opening of the facility.
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Famous quotes containing the words testing and/or inspection:
“Now I see that going out into the testing ground of men it is the tongue and not the deed that wins the day.”
—Sophocles (497–406/5 B.C.)
“Hermann Goering, Joachim von Ribbentrop, Albert Speer, Walther Frank, Julius Streicher and Robert Ley did pass under my inspection and interrogation in 1945 but they only proved that National Socialism was a gangster interlude at a rather low order of mental capacity and with a surprisingly high incidence of alcoholism.”
—John Kenneth Galbraith (b. 1908)