A permeable pavement system utilising recycled concrete aggregate in the sub-base - Preliminary laboratory performance assessments

J. Monrose*, K. Tota-Maharaj, D. Cheddie, A. Mwasha

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference publication

Abstract

Sustainable development gears towards preserving the environment and conserving the rapidly diminishing natural resources such as natural resources. This research seeks to assess the performance of crushed recycled concrete aggregates (RCA) from Trinidad and Tobago as sub-base materials in permeable pavement systems (PPS) applicable to urban stormwater management systems across the Caribbean small island developing states (SIDS). Presently, research is lacking regarding the performance of RCA in PPS. These pavement systems are being considered as a natural resource conservation attempt, in addition to reducing surface water flooding in several towns and cities across these SIDS. The project includes laboratory experimental assessment of PPS using RCA versus virgin aggregates (limestone from Trinidad and Tobago and basalt from St. Lucia) from a stormwater quality, geotechnical and hydrologic viewpoint. Stormwater is being collected from various towns and cities across the islands and applied uniformly over the pilot scaled permeable pavements using a purpose-built rainfall simulator. The permeable pavements stormwater treatment efficiencies are being evaluated for the removal and retention of nutrients (nitrates and phosphates), heavy metals (zinc, lead, copper, iron and manganese), suspended solids and turbidity. Hydrologic performances are also being assessed through numerous simulated storm events at various intensities. All pavements have handled 15-minute high intensity rainfall inputs (in excess of 222 mm/h) with 100% infiltration (no surface runoff) recorded. In terms of total suspended solids (TSS) removal, results showed that removal efficiencies varied from 31 to 85% with the RCA test rig recording the highest average TSS trapping efficiency of 58%. The test pavement with RCA in the subbase has performed similarly or better than those with virgin aggregates.

Original languageEnglish
Title of host publicationWorld Environmental and Water Resources Congress 2017
Subtitle of host publicationWater, Wastewater, and Stormwater; Urban Watershed Management; and Municipal Water Infrastructure - Selected Papers from the World Environmental and Water Resources Congress 2017
EditorsBrian Van Weele, Christopher N. Dunn
PublisherAmerican Society of Civil Engineers (ASCE)
Pages140-155
Number of pages16
ISBN (Electronic)9780784480632
DOIs
Publication statusPublished - 18 May 2017
Event17th World Environmental and Water Resources Congress 2017 - Sacramento, United States
Duration: 21 May 201725 May 2017

Publication series

NameWorld Environmental and Water Resources Congress 2017: Water, Wastewater, and Stormwater; Urban Watershed Management; and Municipal Water Infrastructure - Selected Papers from the World Environmental and Water Resources Congress 2017

Conference

Conference17th World Environmental and Water Resources Congress 2017
CountryUnited States
CitySacramento
Period21/05/1725/05/17

Keywords

  • Permeable pavement systems (PPS)
  • Rainfall simulator
  • Recycled concrete aggregates (RCA)
  • Small island developing states (SIDS)
  • Stormwater management
  • Sustainable urban drainage systems (SUDS)

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