Effect of WMA additive on properties of PPA-modified asphalt binders containing anti-stripping agent

Ghabchi, Rouzbeh; Rani, Shivani; Zaman, Musharraf; Ali, Syed Ashik

doi:10.1080/10298436.2019.1614584

Cited by 28 publications

(14 citation statements)

References 36 publications

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“…where IRI is the predicted IRI value (in./mi), IRI 0 is the initial IRI after construction (in./mi), RD is the average rut depth (inches), FC Total is the area of fatigue cracking (combined alligator, longitudinal, and reflection cracking in the wheel path), percent of total lane area, TC is the length of transverse cracking, including the reflection of transverse cracks in existing Hot Mix Asphalt pavements (ft/mi), C 1,2,3,4 are calibration factors with a value of C 1 = 40.0, C 2 = 0.400; C 3 = 0.008; C 4 = 0.015, and SF is a site factor, calculated by Equation (10).…”

Section: Deterministic Models For Iri Predictionmentioning

confidence: 99%

IRI Performance Models for Flexible Pavements in Two-Lane Roads until First Maintenance and/or Rehabilitation Work

et al. 2020

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Pavement performance models play a vital role in any pavement management system. The Regional Government of Biscay (RGB) (Spain) manages a 1200 km road network and conducts pavement data collections, including the International Roughness Index (IRI) values. The aim of the paper is to develop an IRI performance model for two-lane roads with flexible pavement until the first maintenance and/or rehabilitation activity is performed. Due to the huge amount of available information, a deterministic model was selected. A literature review of deterministic models showed that, apart from age and traffic volumes, the pavement structure is a key factor. Therefore, it was decided to analyze the only road stretches whose entire pavement section was known (surface layer + base + subbase). Various variables related to age, traffic volumes and employed materials were introduced as possible factors. The multiple linear regression model with the highest coefficient of determination and all the variables significant included the real pavement age, the cumulated heavy traffic and the total thickness of bituminous layers. As the material employed in the surface layer could affect roughness progression, a qualitative variable was introduced to consider various surface materials. The model improved its accuracy, indicating that the surface layer material is also an influencing factor on IRI evolution.

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Section: Deterministic Models For Iri Predictionmentioning

confidence: 99%

IRI Performance Models for Flexible Pavements in Two-Lane Roads until First Maintenance and/or Rehabilitation Work

et al. 2020

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“…For blending purposes, different protocols have been used by researchers. For example, Zhang and Yu, 16 Baldino et al, 17 Rani et al, 18,19 and Ghabchi et al 20 used HSM for blending asphalt binder and additives at a rotational speed that varied from 500 to 5000 rotations per minute (rpm). Accordingly, in this study, a high shear mixer was used to prepare the asphalt binder and additive blends at a rotational speed of 1000 rpm for 45 min at 145 °C.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…For blending purposes, different protocols have been used by researchers. For example, Zhang and Yu, Baldino et al., Rani et al, , and Ghabchi et al . used HSM for blending asphalt binder and additives at a rotational speed that varied from 500 to 5000 rotations per minute (rpm).…”

Section: Methodsmentioning

confidence: 99%

Rheology of Virgin Asphalt Binder Combined with High Percentages of RAP Binder Rejuvenated with Waste Vegetable Oil

et al. 2020

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Waste cooking oils (WCOs) show promise as a rejuvenator for reclaimed asphalt pavement (RAP) binders. Their use helps to make RAP a renewable resource and to address environmental concerns related to WCO disposal. While studies suggest that 100% RAP for pavement is feasible, RAP will likely be combined with a virgin binder and aggregate incrementally in the field. In this study, the rheological properties of the virgin binder blended with a simulated RAP binder and 10% waste vegetable oil (WVO) as a rejuvenator were examined. Viscosities below that of a PG 64-22 virgin binder were observed with WVO in blends of 40 or 60% RAP and the virgin binder. The virgin-60% RAP/WVO binder blend retained a Superpave grade of the virgin binder and was found to satisfy requirements for both rutting parameter and fatigue resistance. Results indicated that WVO significantly reduced the effects of long-term ageing, making the blend containing RAP durable. The effect of RAP content on WVO/virgin binder blends was most pronounced on the rutting parameter. A “molecular lubrication” model is suggested as a mechanism for the viscosity reduction with WVO.

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“…Since further oxidation can take place also after paving in a slower process called ageing which also involves loss of more volatile components and structural aggregations [19], the same problem holds also for longer times. For this, additives, usually based on strong acids or bases, are present on the market [20][21][22], but eco-friendly additives are recently being studied [23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

How Organic Waste Improves Bitumen’s Characteristics

Caputo

Porto

Loise

et al. 2021

Eurasian Chem. Tech. J.

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The organic fraction derived from the differentiated collection of urban waste is mainly composed of fatty acids, medium molecular weight hydrocarbons and cellulose. This peculiar composition gave us insight into the possible use of organic waste to improve bitumen’s characteristics (possible antioxidant, regenerating and/ or viscosifying additive for road pavements). The issue of the disposal of organic waste is a global one and it’s constantly of increasing concern. This study looks to alleviate this problem by finding ways for this waste fraction to be utilized for the greater good- in this case, as an additive for bitumen binder in road pavements. The present study is focused on the use of waste as it is and waste treated by the FENTON process (treatment with ferrous sulphate and hydrogen peroxide solution). Dynamic Shear Rheology (DSR) and aging tests (Rolling Thin Film Oven Test, RTFOT) showed that two of the additives tested in this study proved effective: one can be utilised as a viscosifying agent and the other can be us ed as a filler.

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Effect of WMA additive on properties of PPA-modified asphalt binders containing anti-stripping agent

Cited by 28 publications

References 36 publications

IRI Performance Models for Flexible Pavements in Two-Lane Roads until First Maintenance and/or Rehabilitation Work

IRI Performance Models for Flexible Pavements in Two-Lane Roads until First Maintenance and/or Rehabilitation Work

Rheology of Virgin Asphalt Binder Combined with High Percentages of RAP Binder Rejuvenated with Waste Vegetable Oil

How Organic Waste Improves Bitumen’s Characteristics

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