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

被引：36

作者：

Flyhammar, P.

Bendz, D.

机构：

[1] Lund Univ, SE-22100 Lund, Sweden

[2] Swedish Geotech Inst, SE-21133 Malmo, Sweden

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2006年 / 137卷 / 01期

基金：

瑞典研究理事会;

关键词：

transport processes; asphalt pavement; shoulder; advection; diffusion;

D O I：

10.1016/j.jhazmat.2006.02.072

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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.

引用

页码：603 / 611

页数：9

共 25 条

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