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Oral/Poster Abstract

328853 - Rapidly Cleaned Out Permeable Interlocking Concrete Pavers - One Year Report

Tuesday, November 7
1:30 PM - 3:00 PM
Location: Aspen - Salon A

For many years, Permeable Interlocking Concrete Pavers (PICP) have been used successfully for plazas, pedestrian areas, parking lots, storage areas and vehicular streets. Their ability to infiltrate routine rainfall events and act as a Green Infrastructure has been thoroughly researched and confirmed in various previous research projects and publications.


To preserve their infiltration capability, permeable pavements must be maintained. This means that accumulated pollutants, dirt and dust must be removed. However, often this task has proven to be far from simple. Cleaning maintenance is delayed, missed, performed incorrectly or simply difficult. To eliminate the ongoing maintenance concerns for these otherwise very effective stormwater management BMPs a new PICP design was developed.


Where clogging of drainage cells in PICP is dominantly in the upper parts of the filter media, infiltration rates in special PICPs may be rapidly restored if the PICP design is dovetailed to the fluid mechanics of the street cleaning equipment. PICPs described in this paper have special purpose cupules (shaped filter recesses in the upper surface of the block) for rapid cleaning, which are connected to drainage conduits. These cupules facilitate rapid removal of filter media and filtrate by routine street cleaning equipment at economical street sweeper speeds. Below the cupules, the drainage conduits are designed to provide specified maximum or controlled drainage flow rates.


To develop these special PICPs – here denoted RCPPs (rapidly cleaned permeable pavers) and to confirm their real-world performance, experiments were carried out in Ontario, Canada over the term of one year. Stating as initial laboratory experiments, full scale field tests followed. The paper describes the concept and results.


In summary, the new RCPP promises effective capture of particulates and pollutants attached to them by routine (“routine” meaning conventional, or off-the-shelf, i.e. non-special-purpose) street cleaning equipment. By rendering maintenance and clean-out more effective and more economical, these RCPP could significantly advance environmental protection.

Harald von Langsdorff

Technical Director
UNI-GROUP U.S.A

Harald von Langsdorff has an engineering degree (Dipl-Ing) from the University of Giessen, Germany. He is a member in ASCE since 2001. Since 1975, he has worked with design professionals in design, construction and maintenance of every kind of interlocking, permeable interlocking concrete pavement, paving slab and grid applications both in the USA, Canada and abroad.
Besides publishing many articles and peer-reviewed technical papers, Harald has also participated in the development of technical bulletins for the paver industry and associations. He co-authored numerous technical articles in English and German language covering residential, commercial and municipal applications.
Starting in 1993, Harald is Technical Director of the UNI-GROUP U.S.A. an association of interlocking concrete paver manufacturers. Since 1988, Harald has written or revised several product standards and advanced interlocking paving stone technology. In recent years, Harald manages a range of industry research projects including performance studies for permeable interlocking concrete pavement.

Presentation(s):

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William James

CHI, Guelph, Ontario

Presentation(s):

Send Email for William James


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