Laboratory investigation of dynamic rheological properties of tourmaline modified bitumen

Wang, Chaohui; Wang, Peng; Li, Yanwei; Zhao, Yongzhen

doi:10.1016/j.conbuildmat.2014.12.105

Cited by 46 publications

(10 citation statements)

References 3 publications

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“…Nonetheless, producing those asphalt materials at lower temperatures while achieving the same high level of mechanical properties and field performance remains to be a challenge. Wang et al [7,8,23] conducted a comprehensive study on the influence of various types and dosages of tourmaline on the asphalt fume density, the mechanism of hot mixing on the reduction of pollutant emissions, and the road performance of tourmaline-modified asphalt. In addition, the authors conducted a comparison of the asphalt fumes derived from ordinary modified asphalt and tourmaline-modified asphalt via emissions inspection in mixing plants and trial lots.…”

Section: Advances In Materials Science and Engineeringmentioning

confidence: 99%

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Emission Reduction Performance of Modified Hot Mix Asphalt Mixtures

Wang

et al. 2017

Advances in Materials Science and Engineering

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Three novel asphalt modifiers with pollutant emission reduction effects and new emissions measurement equipment compatible with several preexisting asphalt production systems are developed in this paper. The effects of various modifier, asphalt binder type, and gradation of hot mix asphalt (HMA) on pollutant emissions are evaluated in the lab through a comprehensive experimental design. Furthermore, road performances are monitored to evaluate the emissions reduction of modified HMA mixture for production. With increasing modifier content, the emissions reduction performance is improved markedly, with maximum reduction of 70.5%. However, the impact of modifier content on pollutant emissions reduction tends to be insignificant for dosages greater than 20% of the initial asphalt weight. Changes in asphalt type and asphalt mix gradation are found to moderately impact the emissions reduction effect. Finally, the mechanisms of emissions reduction are investigated, primarily attribute to their physical and chemical adsorption and pollutant reductive degradation characteristics.

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Section: Advances In Materials Science and Engineeringmentioning

confidence: 99%

“…WMA releases less heat and emits less pollution during its production and application and greatly diminishes the environmental degradation associated with HMA [4][5][6][7][8][9]. The incorporation of a warm mixing agent also slows down the aging process of asphalt mixture.…”

Section: Introductionmentioning

confidence: 99%

Emission Reduction Performance of Modified Hot Mix Asphalt Mixtures

Wang

et al. 2017

Advances in Materials Science and Engineering

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“…Based on the aforementioned principle, Mckinley et al [15], Navid and Pilon [16], and Nguyen et al [17] used TAP for absorbing waste heat. Although Wang et al [18][19][20][21][22] have conducted detailed studies with respect to the usage of TAP as a construction material, it is not widely used in highway construction at present. TAP is used as an inorganic asphalt modifier to prepare modified asphalt that exhibits flame-retardant and smoke-suppression properties.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Properties of an Active Cooling Antirutting Asphalt Mixture

Shuan

Li²,

Xu³

et al. 2020

Advances in Materials Science and Engineering

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To reduce the temperature of asphalt pavements in summer and improve their high-temperature stability, tourmaline anion powder (TAP) was used as a modifier to prepare modified asphalt, which actively cools the pavement. The effects of different TAP contents on the high- and low-temperature performance of modified asphalt and its pavement cooling performance were studied based on the dynamic shear rheometer, low-temperature bending beam rheometer, and indoor rutting plate temperature difference tests; subsequently, the optimum TAP content was determined. Modified asphalt was used to prepare an active cooling antirutting asphalt mixture, and its pavement cooling performance was verified via outdoor lighting tests. High- and low-temperature dynamic modulus and low-temperature semicircular splitting tests were used to evaluate the high- and low-temperature performance; further, freeze-thaw splitting and immersion Marshall tests were performed to evaluate the water stability of the active cooling antirutting asphalt mixture. The results denote that TAP is useful for improving the rutting factor of asphalt. When the TAP content is 16% of the asphalt material, the maximum cooling value of the surface in laboratory tests becomes 5.9°C. When compared with an ordinary asphalt mixture, the dynamic stability of the active cooling antirutting asphalt mixture at medium and high temperatures increased by 18%–22%. The fracture energy can be increased by 12% at low temperatures. The maximum cooling value of the surfaces in outdoor tests is 7.2°C, and the water stability slightly decreases; however, it still satisfies the specification requirements.

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“…Heavy traffic, especially, that of heavy vehicles, leads to the deterioration of the asphalt pavement in the form of cracks and permanent deformation. Therefore, to improve its durability various modifiers of asphalt binders are used ranging from the very popular ones such as polymers (Wang et al 2015b), through the natural asphalts (Yilmaz, Çeloglu 2013), natural rubber (Al-Mansob et al 2014) to the very specific ones such as, for example, the tourmalines (Wang et al 2015a) or polyaminoamide (Haritonovs 2015). However, when modifying bitumen it is necessary to make an effort to find out what the effect of the added modifier on the aging process of the asphalt binder might be in manufacturing, paving of the asphalt mixture and operation of the asphalt pavement.…”

Section: Introductionmentioning

confidence: 99%

An experimental study of the impact of aging on Gilsonite and Trinidad Epuré modified asphalt binders properties

Słowik

Bilski

2017

The Baltic Journal of Road and Bridge Engineering

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The tests and analyses presented in the paper are related to the 20/30, 35/50 and 50/70 penetration grade road bitumens as well as the asphalt binders obtained through modification of the 35/50 and 50/70 bitumens. The latter were modified by adding to it 3%, 5% and 7% of the Gilsonite natural asphalt and 15%, 25% and 35% of the Trinidad Epuré Z 0/8 natural asphalt. The aim of the study was to assess the changes in the functional and rheological properties of theroad bitumens that were modified by adding to them the Gilsonite and Trinidad Epuré natural asphalts. The modified asphalt binders were subjected to the laboratory simulated short-term and long-term aging, where two methods, designed as part of the Strategic Highway Research Program, were used, i.e. the Rolling Thin Film Oven Test and the Pressure Aging Vessel, respectively. The study of the asphalt binders both those that were subjected to aging and those unaged includes thermal susceptibility (the Penetration Index) and resistance to cracking at low temperatures by tests carried out using the Bending Beam Rheometer. The analysis of the results revealed that the unfavourable impact of the aging process on the asphalt binder properties is limited if a suitable amount of the natural asphalt is used as a modifier.

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Laboratory investigation of dynamic rheological properties of tourmaline modified bitumen

Cited by 46 publications

References 3 publications

Emission Reduction Performance of Modified Hot Mix Asphalt Mixtures

Emission Reduction Performance of Modified Hot Mix Asphalt Mixtures

Preparation and Properties of an Active Cooling Antirutting Asphalt Mixture

An experimental study of the impact of aging on Gilsonite and Trinidad Epuré modified asphalt binders properties

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