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

Abbaspour, Aiyoub; Tanyu, Burak F.; Aydilek, Ahmet H.; Dayioğlu, Asli Y.

doi:10.1680/jgein.17.00034

Cited by 16 publications

(4 citation statements)

References 23 publications

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“…The results of these tests are shown in Table 4. The results of the tests were evaluated, based on the system permeability as defined in the literature ( 21 ), as the overall permeability within the test set-up. The system permeability is dictated by the lowest permeability of the material within the system.…”

Section: Results Of Hydraulic Conductivity Testsmentioning

confidence: 99%

“…The experiments were performed with hydraulic gradient of 1 (the gradient was gradually increased from 0.25 to 0.5 to 0.75 to 1), which covers the worst-case scenario in pavement applications ( 20 ). The results of the tests were evaluated in accordance with the interpretations described in literature ( 21 ).…”

Section: Methodology Used In This Study To Evaluate Exhumed Samplesmentioning

confidence: 99%

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Evaluation of the Long-Term Performance of Woven Geotextile Used between Base Course and Subgrade of a Paved Road

Ullah

Tanyu

Güler

et al. 2019

Transportation Research Record

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The purpose of this research was to investigate the properties of the exhumed geotextile from a low-volume road on the Virginia Department of Transportation network. The exhumed geotextiles have been in service for 23 years, which provided an opportunity to evaluate the longevity of the materials as well as to make assessments of how it relates to the changes in material properties. During this investigation, subgrade and base course materials were also obtained from the same site and an experimental program was developed to evaluate the effectiveness of the exhumed geotextiles for separation, stabilization, and filtration for the base course thicknesses of 4, 6, and 8 in. The results from this study combined with the results from the previous studies conducted at the same site showed that when the geotextile is placed between the subgrade and base course, the thinner the pavement section, the more evident the effectiveness of the geotextile improvements. One important finding of this research was that the placement of a geotextile reduced the particle breakage caused by abrasion under the applied transient loads. This was observed as a stabilization effect of the geotextile inclusion. As a general conclusion, for low-volume roads with relatively thin pavement sections, properly selected geotextiles provide benefits for separating the subgrade and base course (minimizing pumping), filtering infiltrated or ground water, and stabilizing the road profile. These benefits become more apparent when the thickness of the base course is less than 8 in.

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Section: Results Of Hydraulic Conductivity Testsmentioning

confidence: 99%

Section: Methodology Used In This Study To Evaluate Exhumed Samplesmentioning

confidence: 99%

Evaluation of the Long-Term Performance of Woven Geotextile Used between Base Course and Subgrade of a Paved Road

Ullah

Tanyu

Güler

et al. 2019

Transportation Research Record

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“…RCA-geotekstil sisteminin filtrasyon performansının, doğal agrega-geotekstil sisteminin filtrasyon performansından farklı olduğunu belirtmişlerdir. RCA'daki yaşlanmanın filtrasyon performansını etkilediğini belirtmişlerdir [37]. Ryoo ve Aydilek (2019) üç farklı kompost malzeme ve farklı gözenek açıklıklarına sahip üç örgülü geotekstil ile iki örgüsüz geotekstilin filtrasyon performansını değerlendirmek için laboratuvarda uzun süreli filtrasyon deneyleri yapmışlardır [38].…”

Section: Introductionunclassified

Long term filtration performance of recycled asphalt pavement material

Sarıahmetoğlu¹,

İyisan²,

Dayioğlu³

et al. 2021

Pamukkale J Eng Sci

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Bu makalede, inşaat/yıkım (𝐶&𝐷) atığı türlerinden biri olan asfalt atık malzemesinin (𝑅𝐴𝑃) yol altı drenaj sistemlerinde filtre malzemesi olarak kullanılabilirliğinin tespiti için uzun süreli filtrasyon performansı incelenmiştir. Geri kazanılmış asfalt ve geotekstilden Anahtar kelimeler: Geri kazanılmış asfalt malzeme, Örgüsüz geotekstil, Filtrasyon, Geliştirilmiş ASTM D 5101 filtrasyon deneyi, Sürdürülebilirlik.

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“…4 The clogging of the geotextiles consists of physical clogging, 5,6 chemical clogging 7 and biological clogging, 8 and the chemical clogging is more complex than the physical clogging. 9 Researchers have done a great deal of work on the chemical clogging of geotextiles. [10][11][12] McIsaac and Rowe 13 simulated a typical leachate collection system in a landfill using a mesocosm setup, which showed that the nonwoven geotextile had higher resistivity to chemical clogging than the woven geotextile.…”

mentioning

confidence: 99%

Influence of polyurethane foam on chemical clogging of nonwoven geotextile and tailings caused by ferrous iron

Liu

Wang

Feng

2020

Textile Research Journal

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The chemical clogging of geotextiles filters is a common issue, which threatens the safety of engineering projects. To reduce the chemical clogging of nonwoven geotextiles and enhance their drainage capability, a polyurethane foam was innovatively placed under the nonwoven geotextiles in this paper. A series of column tests were conducted to study the mechanism of the polyurethane foam to reduce the chemical clogging of the nonwoven geotextile filters in tailings caused by ferrous iron. In addition, the influence of the concentration of Fe2+, hydraulic gradient and thickness of the tailings specimen on the chemical clogging of the polyurethane foam and nonwoven geotextiles was examined. Less chemical clogging of geotextiles caused by polyurethane foam was observed and the related mechanism was firstly explained. The polyurethane foam under the geotextile reduced the contact between the geotextile and air. As a result, the chemical clogging of the geotextile was alleviated, which increased the drainage capability of the geotextiles. A high water saturation of the polyurethane foam would help to a reduce the extent of the chemical clogging of the geotextile. The chemical clogging characteristics of geotextiles and polyurethane foam under different concentrations of Fe2+ and hydraulic gradients were observed.

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

Cited by 16 publications

References 23 publications

Evaluation of the Long-Term Performance of Woven Geotextile Used between Base Course and Subgrade of a Paved Road

Evaluation of the Long-Term Performance of Woven Geotextile Used between Base Course and Subgrade of a Paved Road

Long term filtration performance of recycled asphalt pavement material

Influence of polyurethane foam on chemical clogging of nonwoven geotextile and tailings caused by ferrous iron

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