The increasing use of and interest in pervious concrete in construction has led to a need for test methods for the material. Subcommittee C09.49 on Pervious Concrete, part of ASTM International Committee C09 on Concrete and Concrete Aggregates, is currently working on proposed test methods, including two that will cover hardened density and compressive strength.
“Producers are desperate for ways to prove that they have supplied adequate material, designers want to be able to both measure and specify the physical properties that they desire, and users want to be sure that they are getting what they are buying and want some way to check for functionality of the system,” says Walter Flood IV, project manager and assistant engineer, Flood Testing Laboratories Inc., and a C09.49 member.
Speaking of WK29212, Flood says, “Density and void content of pervious concrete control most, if not all, of the critical physical properties of the material. Strength, permeability and durability are all largely governed by the density and void content of the concrete mixture.”
According to Flood, WK29212 will provide a useful way to reliably determine the void content and resulting density of pervious concrete, particularly regarding quality and functionality relative to stated goals or specifications.
Charles Mitchell, a principal at Specialized Engineering and a C09.49 member, says that the task group working on WK29213 has so far performed three sets of tests in their preparation of the proposed standard, which will be useful to pervious concrete producers and testing laboratories in testing compressive strength.
“WK29213 will provide designers of pervious concrete pavements a value to use in their designs,” says Mitchell. “It would also provide an owner with a standard to be used to verify pervious concrete material strengths on their projects.”
All parties with an interest in pervious concrete are encouraged to participate in the development of WK29212 and WK29213.
Technical Information: (WK29212) Walter Flood IV, Flood Testing Laboratories Inc., Chicago, Ill.
(WK29213) Charles Mitchell, Specialized Engineering, Frederick, Md.
ASTM Staff: Scott Orthey