NRMCA Vice President, Local Paving, Phil Kresge recently met with engineers from the Naval Facilities Engineering Command (NAVFAC) – Mid Atlantic Division at the Norfolk Naval Base in Virginia to discuss proposed changes to their pervious concrete specification. "The original spec was developed and adopted in 2012 with help from NRMCA and the ACI 522 Committee," Kresge said. "Unfortunately, it has not evolved with the industry and does not now reflect the most recent technology and industry practices." Kresge noted that issues with the specification were brought to his attention by one of NRMCA’s certified pervious concrete craftsmen.

Among the proposed changes are adjustments to recommended cementitious content, nominal aggregate size, target void content and curing procedures. Approved placement procedures were also updated to include current practices. Additionally, Kresge suggested removal of Solar Reflective Index (SRI) and flatness specification requirements, as neither were appropriate for pervious concrete. "In the past, NAVFAC has been very receptive to our industry’s input and I believe it will still look to us to provide guidance," Kresge said.

 

The NAVFAC pervious specification is part of the Unified Facilities Guide Specification (UFGS) which provides specifications for all branches of the Department of Defense.