Rheology evaluations of WMA binders using ultraviolet and PAV aging procedures

Xiao, Feipeng; Amirkhanian, Serji; Karakouzian, Moses; Khalili, Mehdi

doi:10.1016/j.conbuildmat.2015.01.046

Cited by 59 publications

(17 citation statements)

References 18 publications

(32 reference statements)

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“…The most widely used are the rolling thin film oven test (RTFOT) to simulate short-term ageing and the pressure aging vessel (PAV) test to simulate long-term ageing. It was also reported that the ageing effect of UV and PAV in terms of the stiffness and phase angle depends on asphalt source and grade (Xiao, Amirkhanian, Karakouzian, & Khalili, 2015). Ageing of bitumen has a crucial effect on the durability of asphalt mixtures (Lu, Redelius, Soenen, & Thau, 2011), since stiffer and more brittle binders make an asphalt pavement more prone to cracking.…”

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confidence: 99%

Effect of short-term ageing temperature on bitumen properties

Hofko

Falchetto

Grenfell

et al. 2017

Road Materials and Pavement Design

106

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Properties of asphalt mixtures after ageing are fundamental parameters in determining longterm performance (e.g. durability) of these materials. With increasing popularity of reduced temperature mixtures, such as warm-mix asphalt, WMA, the question remains how a reduction in short-term ageing affects the properties after long-term ageing of bituminous materials. This paper aims to improve our understanding of the effect of asphalt manufacturing temperature on ageing and the resulting mechanical properties of bituminous binder by studying the effect of short-and long-term ageing of different bitumen samples as a function of short-term ageing temperatures. For this purpose, round robin experiments were conducted within the RILEM technical committee (TC) 252 chemo-mechanical characterisation of bituminous materials by 10 laboratories from 5 countries using four binders of the same grade (70/100 pen) from different crude sources. The short-term ageing was carried out using the standard procedure for rolling thin film oven test (RTFOT), but varying the temperatures. Long-term ageing was carried out using the standard procedure for pressure aging vessel (PAV) in addition to RTFOT. For the mechanical characterisation, rheological data were determined by using the dynamic shear rheometer (DSR) and conventional tests, with needle penetration and softening point using the ring and ball method. The results show that although different short-term ageing temperatures showed a significant difference in the mechanical properties of the binders, these differences vanished after long-term ageing with PAV.Keywords: bitumen; DSR; long-term ageing; short-term ageing; asphalt; RTFOT; PAV IntroductionAs an organic material, bitumen undergoes changes in its mechanical characteristics, chemical composition and microstructure due to environmental effects over its lifetime (Glotova, Gorshkov, Kats, Shapiro, & Yureva, 1980;Lee, Tia, Ruth, & Page, 1997;Mills-Beale et al., 2012;Yao, Dai, & You, 2015). Loss of volatile components at elevated temperatures and oxidation are two main factors for these changes. In terms of mechanical properties, bitumen tends to become stiffer, more elastic and brittle over time. Road Materials and Pavement Design109 SARA (saturates, aromatics, resins and asphaltenes) fractions can be observed with an increasing amount of asphaltenes and decreasing amount of aromatics over time Lu & Isacsson, 2002). These changes are generally summarised under the term "ageing". Bitumen ageing can be split up into short-term and long-term ageing. In the case of hot mix asphalt, short-term ageing occurs during asphalt mix production, transport and compaction at the construction site, all of which happens within hours. It is characterised by relatively high temperatures ( > 130°C) and thus, high oxidation rates. Long-term ageing occurs in asphalt pavements in the field as a result of exposure to traffic and climatic conditions during its service life. Compared to short-term ageing, long-term ageing is a slow oxidation process tha...

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confidence: 99%

Effect of short-term ageing temperature on bitumen properties

Hofko

Falchetto

Grenfell

et al. 2017

Road Materials and Pavement Design

106

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“…The thin film oven test (TFOT, ASTM D1754) or rolling thin film oven test (RTFOT, ASTM D2872) is used to replicate the shortterm aging that occurs during the mixing and laying down operations, while the pressurized aging vessel (PAV, ASTM D6521) is adopted to reproduce the long-term aging which occurs during long-term, in-service oxidative aging in the field [6,7]. Those techniques mentioned above mainly simulate the bitumen aging associated with thermal-oxidative aging that is caused by heat and oxygen, but the photo-oxidative aging which is caused by the ultraviolet (UV) radiation and oxygen is often ignored, and there is no standardized test that allows quantitative evaluation of the photo-oxidative of bitumen [8][9][10][11][12][13]. However, it has been found that the UV radiation would induce the aging of the upper layers of wearing courses of pavement and further affect the intermediate and bottom layers [14,15].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the ultraviolet aging resistance of organic layered double hydroxides modified bitumen

et al. 2015

Construction and Building Materials

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“…The performances of UV aging and pressure aging vessel (PAV) aging on asphalt by means of penetration, ductility, softening point, and viscosity were compared. It was found that UV 100 h < PAV < UV 200 h [22,23]. There are considerable research results in the study of WMA's high-and low-temperature performance and aging mechanism after UV aging, but little has been reported on the moisture damage characterization and evaluation of WMA after UV aging.…”

Section: Introductionmentioning

confidence: 99%

Influence of Ultraviolet Aging on Adhesion Performance of Warm Mix Asphalt Based on the Surface Free Energy Theory

Wang

Ren

et al. 2019

Applied Sciences

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To explore the effect of ultraviolet (UV) aging on the adhesion properties of warm mix asphalt (WMA), WMA binders were prepared by adding Evotherm M1 and Sasobit into base asphalt. The base asphalt and two WMA binders were aged using a self-made UV aging box after a rolling thin-film oven test (RTFOT). As a comparison, pressure aging vessel (PAV) tests were performed for asphalt binders after RTFOT. The contact angles between the WMA binder and distilled water, glycerol, and formamide, before and after UV aging, were measured using the sessile drop method. On the basis of the surface free energy (SFE) theory, the SFE and its components, cohesion work, adhesion work, peeling work, and compatibility rate, before and after the UV aging of WMA, were obtained. The results show that the contact angle between WMA and water gradually increases with the degree of UV aging, which indicates that the aging increases the hydrophobicity of asphalt. After the RTFOT aging, UV aging at different times, and PAV aging, the SFE and its component, as well as cohesion work for all asphalt binders were reduced. The attenuation was severe after UV aging, followed by PAV aging and RTFOT aging. With the extension of UV aging time, the adhesion work, hot mix asphalt, and limestone aggregate compatibility rate gradually reduced, the peeling work increased, and the overall adhesion performance became poor. Under the aging effect of RTFOT and PAV, the Evotherm M1 WMA had the strongest anti-peeling ability, better compatibility, and the best adhesion. When the UV aging time of Sasobit WMA reached 100 h, the adhesion performance increased.

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Rheology evaluations of WMA binders using ultraviolet and PAV aging procedures

Cited by 59 publications

References 18 publications

Effect of short-term ageing temperature on bitumen properties

Effect of short-term ageing temperature on bitumen properties

Investigation of the ultraviolet aging resistance of organic layered double hydroxides modified bitumen

Influence of Ultraviolet Aging on Adhesion Performance of Warm Mix Asphalt Based on the Surface Free Energy Theory

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