ICPI Issue 2 2019

routine maintenance schedule. So when clogging occurs, more intensive restorative maintenance is required that involves removal and replacement of sediment and joint stone. This is a more costly, time- consuming process. The Interlocking Concrete Pavement Institute (ICPI) members, staff, and other organizations have researched and witnessed demonstrations on the effectiveness of vacuum machines withdrawing sediment and aggregate from 3-inch deep (~80 mm), ~3/16-inch (5 mm) or larger width joints typical to many PICP projects. The majority of machines are effective, but a bit inefficient because they require several passes to remove these materials. Moreover, the sediment often binds the aggregate, making both difficult to withdraw. Fortunately, recent research and cleaning demonstrations have uncovered three innovative approaches to restoring infiltration of clogged PICP surfaces. These require only one pass

The puddles on this PICP indicate the start of surface clogging due to sediment in runoff received from adjacent impervious pavements. Why not clean them as well?

The biggest factor effecting clogging is the area of contributing impervious pavement delivering sediment to the PICP. There are many projects with no contributing drainage area or CDA. They usually need little if any cleaning. In contrast, sediment from vehicles and especially deteriorating asphalt surfaces deliver small particles that enter the PICP joints and slow infiltration. Owners don’t think of the PICP as a system, instead, they view it as “just another pavement” that requires little maintenance, says Matt Otero, chief operating officer at Designs by Stonescapes in Commerce City, Colorado. “There is a lack of education about how PICP works and why routine maintenance is important.” PICP is a drainage system that must be maintained the same way any other type of filtration system would, he says. “There should also be some thought put in to the design of surrounding landscape areas to minimize runoff debris.” Besides sediment from vehicles, eroding asphalt surfaces present another asphalt sediment source. If not cleaned regularly, over years of neglect, sediment builds up in the PICP joints and bedding.

Inexpensive routine PICP maintenance includes brooms, leaf blowers, rotary brushes, and shop vacs. More expensive methods for larger areas involve using regenerative air machines that, like these other methods, remove loose dirt, leaves, and other debris from pavers and from the top of joints before it enters them via rain and tire traffic. This keeps the pavement infiltrating as designed with minimal replacement of joint aggregate. Unfortunately, most PICP and public agencies owners don’t follow a

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ICPI’smission istodelivereducationandtechnicalguidance leadingtoawareness,acceptanceanduseof segmentalconcretepavementsystems in theUnitedStatesandCanada. ICPIhasdevelopedTechSpecs to supportthismission.Distributionof ICPITechSpecs issponsoredbythe followingcompanies:

AbbotsfordConcreteProducts www.pavingstones.com Acker-StoneIndustries

NewLineHardscapes www.newlinehardscapes.com NicolockPavingStones www.nicolock.com OAKSLandscapeProducts www.oakspavers.com OldcastleArchitecturalProductGroup www.belgard.com OlsenPavingstone,Inc.

CountyMaterialsCorporation www.countymaterials.com E.P.HenryCorporation www.ephenry.com EagleBayHardscapeProducts www.eaglebayusa.com ExpocreteConcreteProductsLtd. www.expocrete.com FredAdamsPavingCo.,Inc. www.fredadamspaving.com GagneandSon www.gagneandson.com Genest www.genest-concrete.com HardscapesUSA www.hardscapesusa.com InterlockPavingSystems,Inc. www.interlockonline.com KeystoneHardscapes www.keystonehardscapes.com McNearBrick&Block www.mcnear.com

www.ackerstone.com ACMChemistries,Inc. www.acmchem.com AirVolBlock,Inc. www.airvolblock.com

AngelusBlockCo.,Inc. www.angelusblock.com BarkmanConcreteLtd. www.barkmanconcrete.com Basalite www.basalitepavers.com BestWayStone,Ltd. www.bestwaystone.com BolducConcreteProducts www.bolduc.ca BorgertProducts,Inc. www.borgertproducts.com Brown’sConcreteProducts,Ltd. www.brownsconcrete.com

www.olsenpavingstone.com ORCOBlock&Hardscape www.orco.com PacificPavingstone www.pacificpavingstone.com PaversbyIdeal www.idealconcreteblock.com R.I.LampusCompany www.lampus.com ShawBrick www.shawbrick.ca Stepstone,Inc. www.stepstoneinc.com Techo-Bloc www.techo-bloc.com UnitPaving,Inc. www.unitpaving.com WillametteGraystone www.willamettegraystone.com

MidwestBlock&Brick www.midwestblock.com MutualMaterialsCompany www.mutualmaterials.com

CalstoneCompany www.calstone.com CambridgePavers,Inc. www.cambridgepavers.com

Visit www.icpi.org to find industry-leadingmember contractors,manufacturers, distributors and suppliers .

The InterlockingConcretePavement Institute (ICPI) is the authority for concrete pavers and slabs inNorthAmerica, bringing togetherproducers, contractors,dealers/distributors, industry suppliers and designers in an industry-wide effort to create high-qualityproducts anddeliver the best results for both residential and commercial customers. ICPImembers represent the top segmental concretepaver and slab companies inNorthAmerica.

For an overview of PICP maintenance practices, download ICPI Tech Spec 23.

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