The Use of Recycled Open Graded Porous Asphalt in High Performance Surfacing Mixes for High Volume Roads

Holleran, Irina; Wilson, Donald W.; Walubita, Lubinda F.; Holleran, G

doi:10.3850/978-981-11-0449-7-032-cd

Cited by 2 publications

(2 citation statements)

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“…Part A is the epoxy resin (modifier), which is clear, viscous, and made up of bisphenol-A epoxy resin. According to the supplier's information, Part A had a viscosity of 600-1000 millipascal seconds (mPa-s) at 23 • C and a relative density of 1.15 at 20 • C. It improves physical-chemical degradation and strengthens the fatigue and adhesive properties of the binder [19][20][21], leading to an overall improvement of the durability and strength of the pavement. Part B is a hardener or curing agent and is a black material formed of amines or anhydride.…”

Section: Methodsmentioning

confidence: 99%

Investigating the Effectiveness of Fourier Transform Infrared Spectroscopy (FTIR) as an Antifraud Approach for Modified Epoxy Asphalt Mixes in Developing Countries

Ngezahayo,

Eskandari Torbaghan,

Metje

et al. 2023

Sustainability

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The road surfacing material is continuously exposed to both traffic and climate stresses, including extreme temperatures and heavy rainfalls. Subsequently, most road defects start from the surface and potentially develop into road structural damage. Appropriate road maintenance schemes are necessary to ensure the surface remains functionable. On the other hand, these maintenance schemes would be uneconomical without the use of durable and climate-resilient materials for road surfacing. This is vital in low-income countries (LICs), where the burdens of road maintenance are economically unbearable. In this regard, long-life epoxy-modified asphalt offers an opportunity to achieve durable and climate-resilient pavement surfacing. However, epoxy is an expensive material that may be subject to fraud, leading to poor quality of the surfacing mixture and the resulting road infrastructure. In order to prevent fraud and ensure the quality of epoxy bitumen mixtures for road surfacing, Fourier transform infrared spectroscopy (FTIR) was used to characterise mixes of epoxy-modified bitumen and trace the content of epoxy. The findings showed that the epoxy content used in the preparation of mixes agreed with the epoxy content traced using FTIR. The mean difference between the two quantities was approximately ±1.0% with a correlation coefficient R2 > 0.9. Therefore, FTIR can efficiently provide an antifraud method for modified epoxy asphalt mixes at the plant level to help achieve sustainable pavements.

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Section: Methodsmentioning

confidence: 99%

Investigating the Effectiveness of Fourier Transform Infrared Spectroscopy (FTIR) as an Antifraud Approach for Modified Epoxy Asphalt Mixes in Developing Countries

Ngezahayo,

Eskandari Torbaghan,

Metje

et al. 2023

Sustainability

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show abstract

“…There are two main types of permeable pavements that can be used on urban streets: pervious cement concrete and porous asphalt concrete. Both pervious cement concrete and porous asphalt concrete have been shown to significantly reduce standing water on streets, which reduces hydroplaning [12] and improves skid resistance [13], creating a safer surface for driving. Permeable pavements have also been shown to lower tire noise, improve nighttime visibility, and reduce heat-island effects in urban areas [14].…”

Section: Introductionmentioning

confidence: 99%

Permeable Pavement in the Northwestern United States: Pollution Source or Treatment Option?

Poor,

Kaye,

Struck

et al. 2023

Sustainability

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Permeable pavements can be an effective stormwater mitigation technique, but there are concerns that polluted stormwater may contaminate groundwater as stormwater infiltrates through the soil beneath the pavement. This research evaluates the pollutant removal capabilities of pervious pavements using pervious cement concrete (PC) and porous asphalt concrete (PA) cylinders. Stormwater collected from an outfall was used to perform three tests. The influent and effluent were analyzed for metals, semi-volatile organic compounds (SVOCs), phosphorus, and turbidity. Average percent removal for metals were 37–63% except for zinc, which had an average export of 21% for pervious cement concrete and 52% for porous asphalt concrete. Only 10 of the SVOCs tested had an influent concentration above detection levels. Complete removal (below detection levels) was observed for benzo(a)anthracene, benzo(a)pyrene, chrysene, and indeno(1,2,3-cd) pyrene. Average removals for benzo(b)fluoranthene, benzo(g,h,i)perlyne, fluoranthene, phenanthrene, pyrene, and bis(2-ethylhexyl)phthalate were 63–96%. No significant removal was observed for total phosphorus and reactive phosphate. All contaminant concentrations were below drinking water limits except lead, which would likely be removed in the soil layer below the pavement. This study indicates permeable pavements can effectively remove stormwater contaminants and protect groundwater as a drinking water source.

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The Use of Recycled Open Graded Porous Asphalt in High Performance Surfacing Mixes for High Volume Roads

Cited by 2 publications

References 0 publications

Investigating the Effectiveness of Fourier Transform Infrared Spectroscopy (FTIR) as an Antifraud Approach for Modified Epoxy Asphalt Mixes in Developing Countries

Investigating the Effectiveness of Fourier Transform Infrared Spectroscopy (FTIR) as an Antifraud Approach for Modified Epoxy Asphalt Mixes in Developing Countries

Permeable Pavement in the Northwestern United States: Pollution Source or Treatment Option?

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