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Leaching of different elements from subbase layers of alternative aggregates in pavement constructions

Flyhammar, Peter LU and Bendz, David LU (2006) In Journal of Hazardous Materials 137(1). p.603-611
Abstract
The objective of this study was to analyze the accumulated effects of leaching in two test roads were municipal solid waste incineration (MSWI) bottom ash and aggregate from a railway embankment, respectively, were used as subbase aggregates. Solid samples from the subbase and the subgrade were collected in trenches, which were excavated perpendicular to the road extension. The samples were analyzed with respect to pH, water content, electrical conductivity and extractable fractions of macro and trace constituents. To conclude, spatial distribution patterns of different constituents in subbase and subgrade layers confirms the existence of two major transport processes in a road with permeable shoulders: diffusion underneath surface asphalt... (More)
The objective of this study was to analyze the accumulated effects of leaching in two test roads were municipal solid waste incineration (MSWI) bottom ash and aggregate from a railway embankment, respectively, were used as subbase aggregates. Solid samples from the subbase and the subgrade were collected in trenches, which were excavated perpendicular to the road extension. The samples were analyzed with respect to pH, water content, electrical conductivity and extractable fractions of macro and trace constituents. To conclude, spatial distribution patterns of different constituents in subbase and subgrade layers confirms the existence of two major transport processes in a road with permeable shoulders: diffusion underneath surface asphalt layers driven by a concentration gradient directed horizontally towards the shoulder of the road where the dissolved elements are carried away by advection. (c) 2006 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
advection, diffusion, shoulder, transport processes, asphalt pavement
in
Journal of Hazardous Materials
volume
137
issue
1
pages
603 - 611
publisher
Elsevier
external identifiers
  • wos:000240581300074
  • scopus:33747774198
  • pmid:16762498
ISSN
1873-3336
DOI
10.1016/j.jhazmat.2006.02.072
language
English
LU publication?
yes
id
a32367fa-e331-471b-96ac-ea62ff97ce27 (old id 393038)
date added to LUP
2016-04-01 12:04:57
date last changed
2020-01-12 09:10:42
@article{a32367fa-e331-471b-96ac-ea62ff97ce27,
  abstract     = {The objective of this study was to analyze the accumulated effects of leaching in two test roads were municipal solid waste incineration (MSWI) bottom ash and aggregate from a railway embankment, respectively, were used as subbase aggregates. Solid samples from the subbase and the subgrade were collected in trenches, which were excavated perpendicular to the road extension. The samples were analyzed with respect to pH, water content, electrical conductivity and extractable fractions of macro and trace constituents. To conclude, spatial distribution patterns of different constituents in subbase and subgrade layers confirms the existence of two major transport processes in a road with permeable shoulders: diffusion underneath surface asphalt layers driven by a concentration gradient directed horizontally towards the shoulder of the road where the dissolved elements are carried away by advection. (c) 2006 Elsevier B.V. All rights reserved.},
  author       = {Flyhammar, Peter and Bendz, David},
  issn         = {1873-3336},
  language     = {eng},
  number       = {1},
  pages        = {603--611},
  publisher    = {Elsevier},
  series       = {Journal of Hazardous Materials},
  title        = {Leaching of different elements from subbase layers of alternative aggregates in pavement constructions},
  url          = {http://dx.doi.org/10.1016/j.jhazmat.2006.02.072},
  doi          = {10.1016/j.jhazmat.2006.02.072},
  volume       = {137},
  year         = {2006},
}