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:
“Is this testing whether I’m a replicant or a lesbian, Mr. Deckard?”
—David Webb Peoples, U.S. screenwriter, and Ridley Scott. Rachel, Blade Runner, being tested to determine if she is human or machine (1982)
“Utopias are presented for our inspection as a critique of the human state. If they are to be treated as anything but trivial exercises of the imagination. I suggest there is a simple test we can apply.... We must forget the whole paraphernalia of social description, demonstration, expostulation, approbation, condemnation. We have to say to ourselves, “How would I myself live in this proposed society? How long would it be before I went stark staring mad?””
—William Golding (b. 1911)