Assessing the Potential For Rehabilitation of Surface Permeability Using Regenerative Air and Vacuum Sweeping Trucks

Drake, Jennifer; Bradford, Andrea

doi:10.14796/jwmm.r246-16

Cited by 6 publications

(4 citation statements)

References 18 publications

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“…Researchers evidently differ on methods for restoring PICP infiltration: Henderson and Tighe (2011) recommend fire or power hosing, whereas Chopra et al (2010) and Drake and Bradford (2013a;2013b) examined vacuum sweeping. Winston et al (2016) found that vacuuming does not restore infiltration capacity.…”

Section: Methodsmentioning

confidence: 99%

Towards Restoring Infiltration in Permeable Pavers—Initial Demonstration of Rapid Clean-out Concepts

James¹,

Langsdorff²

2016

JWMM

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Where clogging of drainage cells in permeable interlocking concrete pavers (PICPs) is dominantly in the upper parts of the filter media, as it is in most cases, 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 speeds. Below the cupules, the drainage conduits are designed to provide specified maximum or controlled drainage flow rates. Further, geometry of the resulting drainage cell also meets the requirements of the Americans with Disability Act as well as certain requirements for mass production. To develop these special PICPs-here denoted RCPPs (rapidly cleaned permeable pavers)-experiments were carried out in Guelph, Southern Ontario. This paper describes initial RCPP demonstrations using a rig designed to reveal the fluid mechanics and performance of a regenerative air cleaner moving horizontally over test blocks having the same geometry as the RCPPs, and filled with non-cohesive filter aggregate. Note that these tests were designed to examine the dynamic fluid mechanics of the removal of filter media by a moving pickup head, as affected by geometrical variables only. In our continuing experiments, the independent variables are: V, speed of cleaning equipment over the pavement; θ, angle of the cleaning jets; v, air velocity in the cleaning jets; d and φ, geometry of the cupules; w, width of drainage conduit; and G, gradation of the filter media. S, the ratio of the mass of removed and captured to the original mass of cupule filter media (plus filtrate), is the dependent variable. S is measured by weighing the aggregate added when replacing that removed by the regenerative air vortices, and dividing by the original weight of the aggregate in the cupule. Our laboratory experiments demonstrated that, for the chosen geometries and filter aggregate, complete removal (S ≥ 1.0) is easily achieved in one pass at reasonable speed. The paper describes our experimental rig and demonstrates the cleanout concepts, and includes CAD files of detailed drawings of the components of the rig and test blocks, as well as slow motion video clips of the clean out processes. In essence, the new RCPP promises ready capture of particulates and pollutants attached to them by routine (routine meaning conventional, or off-the-shelf, non-special-purpose) regenerative-air street cleaning equipment. Evidently these RCPPs could significantly advance environmental protection, by rendering clean-out more effective and more economical.

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Section: Methodsmentioning

confidence: 99%

Towards Restoring Infiltration in Permeable Pavers—Initial Demonstration of Rapid Clean-out Concepts

James¹,

Langsdorff²

2016

JWMM

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“…Several studies, analyzing different aspects, demonstrate the variability of volumes and peak flow [1]. Other studies have found that PP systems do not generate outflow for minor events preceded by dry antecedent conditions [9,10].…”

Section: Hydrological Performance Of Ppsmentioning

confidence: 99%

A Systematic Review of the Hydrological, Environmental and Durability Performance of Permeable Pavement Systems

et al. 2021

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Due to urbanization, large portions of vegetated territory have been replaced by waterproof surfaces. The consequences are greater outflows, lower infiltration, and lower evapotranspiration. Pavement systems made with permeable surfaces allow the infiltration of water, ensuring reduction of runoff volume. In this paper, the methods of analysis of the hydrological and environmental performance of the pavement systems are reviewed in the context of urban drainage and regarding their durability. The purpose is to present an overview of the studies published during the last decade in the field. The Pubmed and Web Science Core Collection electronic databases were used to conduct the scientific literature survey. This generated 1238 papers, of which only 17 met the criteria and were included and discussed in this review. The evidence drawn from the knowledge on which the document is based provides useful critical interpretations of existing studies to progress the current understanding on hydrological performance and environment impacts in terms of conventional pollutant removal efficiency and the current permeable pavement systems.

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“…Some decades later, Drake and Bradford (2013) assessed the potential for the rehabilitation of surface permeability using RASSs and VSSs. A RASS was tested on two parking lots with wellused PICP while a VSS was tested on a third parking lot with PICP.…”

Section: Restoring Infiltration In Picpmentioning

confidence: 99%

Permeable Pavers Designed for Rapid Renewal by Considering Sweeper Mechanics: Initial Field Tests

James¹,

Langsdorff²

2018

JWMM

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Previous publications on restoring clogged permeable interlocking concrete pavers (PICPs), and also on available street sweeping equipment, are reviewed in some detail. Special drainage cell geometries, called cupules, in specific PICPs were tested under moving regenerative-air pick-up heads in a laboratory rig, and early results have been discussed in a previous paper.Reported here are follow-up field tests on three different parking lot pavements at one installation of rapidly cleaned out PICPs (RCPP) using a wide range of readily available street cleaning equipment. Rapid cleanout of the special purpose cupules at various sweeper speeds is measured and reported for a regenerative air sweeper, two types of mechanical sweepers, and a portable blower with two pick-up head directions of travel and for different filter media. A cost comparison of sweeper performance is presented. Preliminary results of these initial RCPP field tests evidently conflict with recommendations by authorities. Results are, however, considered to be initial, because of insignificant diminution in surface infiltration rates caused by clogging. However, according to the present study, routine RCPP management should ensure that rapid cleanouts similar to those observed here will continue to be experienced over extended time, and RCPP left uncleaned for a prolonged time will be restored more quickly and easily than is the case with the current generation of PICPs. Inexpensive and easy renewal of filter media could lead to improved pavement and deicing management strategies. Accompanying this paper are two short videos that show our field procedures for pavement installation, cleanout and restoration. An algorithm is provided for estimating minimum cost cleanout of PICPs.

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Assessing the Potential For Rehabilitation of Surface Permeability Using Regenerative Air and Vacuum Sweeping Trucks

Cited by 6 publications

References 18 publications

Towards Restoring Infiltration in Permeable Pavers—Initial Demonstration of Rapid Clean-out Concepts

Towards Restoring Infiltration in Permeable Pavers—Initial Demonstration of Rapid Clean-out Concepts

A Systematic Review of the Hydrological, Environmental and Durability Performance of Permeable Pavement Systems

Permeable Pavers Designed for Rapid Renewal by Considering Sweeper Mechanics: Initial Field Tests

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