Effects of HDPE Utilization and Addition of Wetfix-Be to Asphalt Pavement in Tropical Climates

Nawir, Daud

doi:10.28991/cej-2022-08-08-010

Cited by 16 publications

(4 citation statements)

References 25 publications

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“…Binder modification with recycled polymer and/or HDPE plastic waste decreases the penetration value and weight loss; increases the viscosity, ductility, flash point temperature, and softening point temperature. This makes the bitumen harder and resistant to high temperatures (Al-Hasan et al 2020 ; Nawir and Mansur 2021 , 2022 )…”

Section: Discussionmentioning

confidence: 99%

Recycling COVID-19 health care wastes in bitumen modification: a case of disposable medical gloves

Gedik

Ozcan

Özcanan

2023

Environ Sci Pollut Res

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Disposable medical gloves (DMGs) have long been used to mitigate the risk of direct exposure to diverse microorganisms and body fluids; hence, they are a critical weapon to protect patients and healthcare staff from infectious diseases. Measures to control the spread of COVID-19 have sparked the production of an excessive number of DMGs, most of which are eventually being disposed of in landfills. Untreated DMGs in landfills do not only pose a direct risk of transmitting coronavirus and other pathological germs but also pollute air, water, and soil dramatically. As a healthier alternative, recycling discarded polymer-rich DMGs into bitumen modification is considered to be a prospective waste management strategy applicable to the asphalt pavement industry. In this study, this conjecture is tested by examining two common DMGs — latex gloves and vinyl gloves — at four different percentages (1%, 2%, 3%, and 4% by weight). The morphological characteristics of DMG-modified specimens were inspected by using a high-definition scanning electron microscope (SEM) equipped with an energy dispersive X-ray analyzer (EDX). A wide range of laboratory tests including penetration, softening point temperature, ductility, and elastic recovery were undertaken to evaluate the impact of waste gloves on the conventional engineering properties of bitumen. Moreover, viscoelastic behavior and modification processing were studied by conducting the dynamic shear rheometer (DSR) test and the Fourier transform infrared spectroscopy (FTIR) analysis. Test results have revealed the outstanding potential of recycled DMG waste for modifying neat asphalt binder. More specifically, bitumens modified with 4% latex glove and 3% vinyl glove were seen as capable of superiorly withstanding permanent deformations caused by heavy axle loads at high service temperatures. Furthermore, it has been shown that 1.2 tons of modified binder would embed approximately 4000 pairs of recycled DMGs. This study shows that DMG waste can be used as a viable modifier, which would help open a new avenue for mitigating the environmental pollution arising from the COVID-19 pandemic. Graphical Abstract

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Section: Discussionmentioning

confidence: 99%

Recycling COVID-19 health care wastes in bitumen modification: a case of disposable medical gloves

Gedik

Ozcan

Özcanan

2023

Environ Sci Pollut Res

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“…Clayey soils are characterized by high consistency (stiff to hard), high expansion, and low bearing capacity [1]. Therefore, stabilizing GF soils has been the subject of several studies (e.g., [2][3][4]) by adding stabilizers such as lime and cement, construction waste, and crushed glass. Although research has shown improvement in GF soils through these studies, incorporating recycled asphalt pavement (RAP) residues has not yet been investigated.…”

Section: Introductionmentioning

confidence: 99%

“…The RAP material combines old petroleum asphalt cement (named "CAP" in Brazil) and aggregate obtained through pavement milling. The properties of milled material depend on the road type, the aggregate used in the mixture, the type of milling machine employed, the exposure time of the pavement to weather conditions, and the CAP content [2]. The cold in-place recycling of pavements is an in-situ technique for the structural and functional rehabilitation of pavements that allows the reuse of the existing pavement structure by adding a stabilizing agent.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Use of Recycled Asphalt Pavement in Soil Stabilization

Lima,

Arrieta-Baldovino,

Izzo

2023

Civ Eng J

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This study addresses unused recycled asphalt pavement (RAP) incorporated into sedimentary soil from the Guabirotuba Formation in Curitiba, Southern Brazil. Different percentages of RAP, ranging from 0% to 80% by weight, were mixed with the pure soil, with and without the addition of pozzolanic Portland cement. Tests were conducted to evaluate the mixtures' compaction properties, mechanical strength, and expansion after curing for up to 28 days. The results showed that adding RAP improved the mixtures' unconfined compressive strength (qu) and splitting tensile strength (qt). Up to 60% RAP, the qu increased by 260 kPa, and the qt increased by 340 kPa compared to the pure soil. The California Bearing Ratio (CBR) tests demonstrated an 18.62% improvement when 80% RAP was added to the untreated soil. In addition, the RAP also reduced the expansion of the compacted blends, with values decreasing from 1.19% to 0.88% with 80% RAP replacement. The expansion value was further reduced to 0.86% when the cement was added. The cement-soil-RAP compacted blends showed suitability for subgrade reinforcement, meeting the criteria of expansion <1% and CBR> 2%. Additionally, 3% cement and 40% RAP mixtures were suitable as a sub-base layer, with expansion <1% and CBR > 20%. The results provide valuable insights into utilizing RAP as an alternative material in soil improvement techniques employing the novelty porosity-to-cement index. Doi: 10.28991/CEJ-2023-09-09-016 Full Text: PDF

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“…Slow removal of water from the bituminous top requires the use of modified bitumen with approximately 15% of polymer dosing or the use of Wetfix Be especially recommended for warmer climates. [2][3] To achieve effective and low-cost sustainable urban drainage system enabling quick removal of storm water which is economical also is a very important question and need of the hour. Permeable pavements are considered to be one of the effective measures for LID (i.e.…”

Section: Introductionmentioning

confidence: 99%

Clog-Resistant Permeable Pavement: Methods of Performance Measurement

Khan,

Ahmad

2023

Curr. World Environ

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Permeable pavements are considered to be one of the effective measures for LID (i.e. Low Impact Development) and SUDS (i.e. Sustainable Urban Drainage System) globally. The major three types of permeable pavements are (a) pervious concrete (PC), (b) previous asphalt (PA), and (c) permeable interlocked concrete paver (PICP). The performance of all types of permeable is satisfactory at the start of the service life but greatly reduced if not maintained on time. Considering the long lengths of the pavements, measurement of permeability at different locations is a cumbersome and tedious task. Therefore, ease of performance and realistic results are of vital importance. In this study, ASTM C1701/C1701M—17a single ring infiltrometer, Stormwater Infiltration Field Test (SWIFT), and NCAT permeameter Methods are discussed in detail and examined for their relative ease of setting-up, versatility and performance. It is concluded that ASTM C1701/C1701M—17a single ring infiltrometer is the most versatile, easy to set up and produces accurate results.

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Effects of HDPE Utilization and Addition of Wetfix-Be to Asphalt Pavement in Tropical Climates

Cited by 16 publications

References 25 publications

Recycling COVID-19 health care wastes in bitumen modification: a case of disposable medical gloves

Recycling COVID-19 health care wastes in bitumen modification: a case of disposable medical gloves

Sustainable Use of Recycled Asphalt Pavement in Soil Stabilization

Clog-Resistant Permeable Pavement: Methods of Performance Measurement

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