Methodology to evaluate hydraulic compatibility of geotextile and RCA in underdrain systems-Reference-Cited by-同舟云学术

Methodology to evaluate hydraulic compatibility of geotextile and RCA in underdrain systems

Published:2018-02 Issue:1 Volume:25 Page:67-84
ISSN:1072-6349
Container-title:Geosynthetics International
language:en
Short-container-title:Geosynthetics International

Author:

Abbaspour A.¹,Tanyu B. F.²,Aydilek A. H.³,Dayioglu A. Y.⁴

Affiliation:

1. Department of Civil, Environmental and Infrastructural Engineering, George Mason University, Fairfax, Virginia, USA,

2. Department of Civil, Environmental and Infrastructural Engineering, George Mason University, Fairfax, Virginia, USA,(corresponding author)

3. Department of Civil and Environmental Engineering, University of Maryland, College Park, Maryland, USA,

4. Department of Civil Engineering, Istanbul Technical University, Maslak, Istanbul, Turkey,

Abstract

Long-term filtration tests were conducted to assess the hydraulic compatibility of the recycled concrete aggregate (RCA) and nonwoven geotextile that is typically used in underdrains. The RCA samples used in this study were collected from a single facility, but with different ages (aged in the laboratory). Geotextile samples were also exhumed after each test and evaluated for reduction in their serviceability. The laboratory tests showed that aging does not adversely affect the hydraulic properties of the RCA in long-term filtration tests. The results showed that the previously defined serviceability criteria based on gradient and permeability ratios are not relevant to evaluate the hydraulic compatibility of RCA/geotextile tested in this study due to the existence of turbulent flow regime. An alternative limiting ratio called herein hydraulic conductivity ratio (HCRLFT) is proposed and validated with long-term filtration tests performed with natural aggregates. An acceptance criterion of HCRLFT ≤ 4 is suggested to assess the compatibility of RCA (or natural aggregate)/nonwoven geotextile systems.

Publisher

Thomas Telford Ltd.

Subject

Geotechnical Engineering and Engineering Geology,Civil and Structural Engineering

Link

https://www.icevirtuallibrary.com/doi/pdf/10.1680/jgein.17.00034

Reference45 articles.

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