Field aging effect on chemistry and rheology of asphalt binders and rheological predictions for field aging

Qin, Qian; Schabron, John F.; Boysen, Ryan; Farrar, Michael J.

doi:10.1016/j.fuel.2013.12.040

Cited by 192 publications

(74 citation statements)

References 24 publications

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“…This may be attributed to the difference of internal structure and gradation between mineral powder and diatomite. Qin et al [18] indicated that the ageing hardening of asphalt was closely correlated and attributed to the compositional changes within asphalts. And Song et al [13] indicated that diatomite particle could effectively adsorb small molecular group and low polar aromatic molecules of asphalt.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, it can be found that diatomite is beneficial for the improvement of mixture properties [11,12,15,17]. Furthermore, Lu and Isacsson [2] and Qin et al [18] also indicated that ageing hardening of asphalt was closely correlated and attributed to the compositional changes within asphalts, which involves the conversion of aromatics into asphaltenes and an increase in total pericondensed aromaticity and carbonyl and sulfoxide functional groups. Porous structure of diatomite could adsorb the small molecules group effectively [13].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of Diatomite and Mineral Powder on Thermal Oxidative Ageing Properties of Asphalt

Cheng

Tao

Jiao

et al. 2015

Advances in Materials Science and Engineering

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Ageing of asphalt affects the performances of asphalt pavement significantly. Therefore, effects of diatomite and mineral powder on ageing properties of asphalt were investigated systematically in order to improve the antiageing property of mixture. Thin film oven test (TFOT) was used to conduct the short term ageing in laboratory. Softening points, penetrations, force ductility, low temperature creep properties, and viscosities of asphalt mastics were tested before and after TFOT, respectively. Results indicated that percent retained penetration (PRP) increased with the increasing of fillers. Increment of softening point (ΔT), ductility retention rate (DRR), deformation energy ageing index (JAI), and viscosity ageing index (VAI) of asphalt mastics nonlinearly decreased with the increasing of fillers. Ageing of asphalt was reduced by diatomite and mineral powder. And the antiageing effect of diatomite was better than that of mineral powder as a result of its porous structure. It is suggested that the mineral powder could be reasonably replaced by diatomite in order to reduce thermal oxidative ageing of asphalt mixture. The optimal content of diatomite 12.8% is also suggested for engineering.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Diatomite and Mineral Powder on Thermal Oxidative Ageing Properties of Asphalt

Cheng

Tao

Jiao

et al. 2015

Advances in Materials Science and Engineering

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“…It is not possible to determine if the thiols are created, because at t 4 we already have a formation of peaks in sulfoxide and carbonyl region, but also a broad peak at frequencies 2500-2750 cm -1 . The reactions (7)(8)(9)(10)(11) are either happening at a much faster rate than in the B experiment or a different mechanism is preferred. Incidentally, the reaction (11) upon contact with FeCl 3 has been reported to occur catalytically, but via different mechanisms and result in slightly different products [50].…”

Section: The Progress Of the Oxidation Reaction In Heterogeneous Specmentioning

confidence: 93%

“…This material transformation has been correlated with the rheological changes [5][6][7][8][9][10][11], commonly referred to as stiffening of bitumen. The common explanation behind the bitumen oxidation reaction is that the uptake of oxygen into the bitumen results in increased polarity of the molecules, which is witnessed by the increasing signal in the carbonyl and sulfoxide characteristic regions in the infrared spectra [6].…”

Section: Introductionmentioning

confidence: 99%

The oxidation of bitumen witnessed in-situ by infrared spectroscopy

2017

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During the production and recycling of asphalt concrete, bitumen in contact with inorganic particles is exposed to air at high temperatures. As a result an oxidation of bitumen, also known as aging, occurs. The reaction between bitumen and air at 163°C was studied insitu with and without the presence of inorganic impurities by means of fourier transform infrared spectroscopy in the attenuated reflectance mode. This oxidation was discovered to be a step-wise reaction facilitated by the oxidation of thiols and creation of peroxides within the system. The rate of reaction was demonstrated to depend on the type of impurity present, of which iron (III) chloride was the strongest catalyst. It was further demonstrated that the oxidation reaction is inhibited by the adsorption of thiol species present in the system on copper particles. Combining copper with the iron (III) chloride-containing system also resulted in the inhibition of signal increase in the sulfoxide region of the spectra. The results of this preliminary research on the bitumen oxidation reaction presented are proposed for further research regarding control of aging of asphalt concrete, especially during the recycling works.

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“…Aging can significantly change the rheological properties of asphalt binders and cause asphalt hardening, leading to embrittlement and reduced life-span of pavements. Therefore, it is of substantial importance to have a good understanding of changes in rheology and structure of asphalt binders under aging environments (Qin et al 2014). The observed rheological hardening is closely correlated and attributed to the compositional changes within asphalts upon field aging, which involves the conversion of aromatics into toluene soluble asphaltenes and an increase in the total pericondensed aromaticity and carbonyl and sulfoxide functional groups.…”

Section: Introductionmentioning

confidence: 99%

Investigation Into Technological Parameters of Bitumen Batching in an Asphalt Mixing Plant

Bražiūnas

2015

Journal of Civil Engineering and Management

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Abstract. An appropriate bitumen content and its properties in hot mix asphalt (HMA) mixture impact on the long-term mechanical strength of the laid asphalt pavement and the required road operation properties. During the production of a HMA mixture in an asphalt mixing plant (AMP), relationships between the structure and interaction of the mixture are established based on technological processes that specify bitumen batching and component mixing. These processes ensure the long-term strength, texture, evenness, the degree of damage and rheological properties of road pavement. The presented mathematical model enables us to determine the distribution of oxygen pressure by time in differently sized drops of bitumen during their fall into a mixer. The model considers oxygen diffusion, which depends on temperature, and heat conductivity, which depends on temperature, density and specific heat. An active experimental investigation under real production conditions demonstrated that the method of bitumen discharge from a batcher, temperature and time spent mixing materials with hot mineral aggregates impact on properties of bitumen binder within the produced HMA mixture. Parameters of technological processes for mixing of bitumen with mineral aggregates that occur in a bitumen batching system (BBS) are stochastic and impact on the composition of bitumen binder as well as physical and mechanical properties of the produced HMA mixture, namely, air void content, stability, flow and Marshall quotient.

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Field aging effect on chemistry and rheology of asphalt binders and rheological predictions for field aging

Cited by 192 publications

References 24 publications

Influence of Diatomite and Mineral Powder on Thermal Oxidative Ageing Properties of Asphalt

Influence of Diatomite and Mineral Powder on Thermal Oxidative Ageing Properties of Asphalt

The oxidation of bitumen witnessed in-situ by infrared spectroscopy

Investigation Into Technological Parameters of Bitumen Batching in an Asphalt Mixing Plant

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