Pervious Concrete: The Road Less Raveled

New Equipment for Cleaning Pervious Concrete

More from the "Tennesee Pervious Concrete Experience".  I just saw this new piece of equipment  in action.  It's for cleaning pervious concrete.  We'll get some ASTM C 1701 results later today on how well it did, but a quick visual evaluation suggests it's a pretty good tool for pervious concrete maintenance.  This is a parking lot where a pile of mulch had been dumped right onto the pervius concrete.

 

Tennessee Pervious Concrete Experience

Cheers to Alan Sparkman for putting on a successful event, "Tennessee Pervious Concrete Experience".  70+ in attendance heard from some of the whales in the pervious concrete community: Heather Brown, Dave Mitchell, L.K. Crouch, and others.

 

ASTM Pervious Concrete Summer Meeting Update 2011

The ASTM C09.49 pervious concrete subcommittee had a healthy meeting this morning. The activity focused on the work of four of the task groups:

Compressive Strength: The task group has round robin data ready to be analyzed, and hopes to have a draft to ballot by September 2011.

Fresh Concrete Density and Voids: Mike Kohout's task group continues to refine ASTM C 1688. Changes to be balloted include editorial and formatting corrections, and adding a section on reporting.

Hardened Concrete Density and Porosity: After being beaten up a bit in a concurrent ballot, Walt Flood's task group has made many changes to the draft and will focus on reballoting this summer. My biggest concern is the data set behind the precision and bias statement. I'd prefer to see it be a little bigger with work done by more labs.

Surface Durability: The draft standard was also cleaned up after many comments were submitted in the last concurrent ballot. The biggest hurdle this document passed (barely) was the question of whether this even needed to be standardized. In the current form, it is only to be used for a concrete producer or researcher to compare mixture proportions. It is not for acceptance, yet. The next draft will be balloted this summer.

Pervious Concrete Paper from World of Coal Ash 2011

If you're looking for a copy of my team's paper from World of Coal Ash 2011, you can find it here.

This is a study where we looked at the impact fly ash and bottom ash have on the raveling potential of pervious concrete.