Characterisation of foam bitumen mixes with diffrent RAP content at elevated mixing temperature using design of experiment (DOE) approach

Fadmoro, Oluwafemi Festus; Kar, Siksha Swaroopa; Tiwari, Diwakar

doi:10.1080/10298436.2021.2020785

Cited by 4 publications

(3 citation statements)

References 47 publications

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“…In the field of asphalt aging and recycling, a growing body of research focuses on understanding the mechanisms of asphalt recycling from a microscopic perspective [10][11][12]. Various techniques such as Fourier Transform Infrared Spectroscopy (FTIR), Gel Permeation Chromatography (GPC), Atomic Force Microscopy (AFM), and other analytical tools are being utilized [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Effect of Blending Behavior on the Performance of Hot Recycled Asphalt Mixtures

Wang,

Ling,

Lin

et al. 2023

Sustainability

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Blending behavior is the main factor influencing hot recycled asphalt mixtures’ actual and design performance. The following steps were taken to investigate the above issues. Firstly, the component changes of asphalt mixtures were studied by thin-layer chromatography, with flame ionization detection to obtain the mechanism of asphalt aging and recycling. Secondly, according to the difference in the recycled asphalt components, the hot recycled asphalt mixtures were optimized based on the Marshall design method. Lastly, the hot recycled asphalt mixtures for the three mixing processes were prepared using the optimized design method described above. Laboratory tests were conducted to evaluate the correlation between the degree of blending (DoB) and the high-temperature stability, low-temperature crack resistance, water stability, and fatigue performance. The test results indicate that reducing light components (saturates and aromatics) and increasing heavy components (asphaltenes and resins) are the main reasons for asphalt aging, and asphalt recycling is an inverse process. Additionally, the performance of hot recycled asphalt mixtures is improved with an increase in DoB. Specifically, the DoB is only 50% to 60% under a normal mixing process, but by adjusting parameters the DoB will increase to 80% to 90%.

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Section: Introductionmentioning

confidence: 99%

Effect of Blending Behavior on the Performance of Hot Recycled Asphalt Mixtures

Wang,

Ling,

Lin

et al. 2023

Sustainability

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“…Active filler materials such as cement [10], [11], [12], [13] hydrated lime [14], fly ash [15] used in foam bituminous mixtures improve the mechanical properties of the mixture [10], [16], [17], [18].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Usability of Foamed Bituminous Mixtures as Bituminous Base Course

ERTEN>

Terzi

Akbulut

2022

Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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Materials recycled with foam bitumen are promising materials for pavements economically and environmentally. However, there are different opinions in the literature about how these materials are positioned in the pavement. It is clear that their performances will not be suitable for the wearing course, but that they are used for the plant mixture base course because they contain bitumen, and that these materials will be neglected in the evaluation of these materials. In the study, 4 different foam bituminous mixes prepared with a recycled pavement material and a standard bituminous base course mix were compared in terms of the resilient modulus obtained from the uniaxial indirect tensile resilient modulus test. Gradation is the same for three of the mixtures, two of them use cement as a mineral binder, but 70/100 grade bitumen in one of these two productions and 50/70 grade bitumen in the other. In the third mixture, 70/100 grade bitumen and hydrated lime (HL)+fly ash (FA) were used. In the final mixture, 70/100 grade bitumen and cement were used as mineral binders, but gradation was changed. In addition, permanent deformation control for the final production was carried out with a triaxial cyclic compression test. It was concluded that all these variables affect the results, but the resilience modulus values obtained for all were quite close to those obtained from the bituminous base sample. Considering that the foamed bituminous mixtures will be thicker than the bituminous base course in practice, it is considered structurally appropriate to use this layer instead of the bituminous base course.

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“…Therefore, these materials are not sensitive to temperature (Asphalt Academy 2009, Saleh and Gaspar 2021), they are sensitive to moisture due to their high void contents (Fu et al 2009) for homogeneous dispersion of the foamed bitumen into the mixture. Another product that affects the performance of foam bituminous mixtures are materials that are characterized as active fillers (Fadmoro et al 2022). These products increase the density of the mixture (Wirtgen 2012), helping to increase strength (Brown and Needham 2000, Wirtgen 2012, Dolzycki et al 2017, Graziani et al 2018, Iwanski et al 2022, Pitawala et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Investigation of Cold Recycling of Bituminous Surface Treatment with Foam Bitumen

ERTEN>

Terzi

Akbulut

2022

Afyon Kocatepe University Journal of Sciences and Engineering

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The course of turned of bituminous pavement layers into hot mix asphalt (HMA) layers has been increasing day by day all over the world. Bituminous surface treatment that contains consirable amount of aggregate and bitumen, is an important source of recycling that offers a great amount of pavement materials intead of virgin material usage on pavement consruction. In the study, it was aimed to investigate the usability of bituminous surface layer treatment in the base layers of the HMA roads by mixing with foam bitumen and active filler materials in order to eliminate the potential performance degradation that will be encountered when it is recycled due to the low bitumen percentage compared to hot mix asphalt and the wear of the aggregate due to climatic conditions and traffic loads over time. The study conducted that intends to technically evaluate the cold recycling of bituminous surface treatment of roads with foam bitumen and active filler materials; for 70/100 bitumen grade, 5 different bitumen mixes were prepared and ideal bitumen percentage was investigated for this bitumen grade. The effect of bitumen percentage on mixture performance was evaluated with 50/70-100/150-160/220 bitumen grades and mixtures were prepared in single bitumen ratio (2.5%). It was investigated that active fillers will give suitable results for foam bituminous mixtures by preparing mixtures for three different active fillers; cement, hydrated lime and fly ash. To evaluate all these productions, ITS, unconfined compressive strenght, triaxial resilient modulus and asphalt permanent deformation tests were performed. The results obtained showed that production made using 2% foam bitumen and 1% was found suitable for moisture sensitivity and structural stability. Recycling of bituminous surface treatment using foam bitumen and cement is an environmentally and economically beneficial method by reducing both waste and raw material consumption.

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Characterisation of foam bitumen mixes with diffrent RAP content at elevated mixing temperature using design of experiment (DOE) approach

Cited by 4 publications

References 47 publications

Effect of Blending Behavior on the Performance of Hot Recycled Asphalt Mixtures

Effect of Blending Behavior on the Performance of Hot Recycled Asphalt Mixtures

Investigation of the Usability of Foamed Bituminous Mixtures as Bituminous Base Course

Investigation of Cold Recycling of Bituminous Surface Treatment with Foam Bitumen

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