Evaluation of different short term aging procedures with neat, warm and modified binders

Dondi, Giulio; Mazzotta, Francesco; Simone, Andrea; Vignali, Valeria; Sangiorgi, Cesare; Lantieri, Claudio

doi:10.1016/j.conbuildmat.2015.12.122

Cited by 60 publications

(21 citation statements)

References 9 publications

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“…Mazzotta used FTIR (Fourier transform infrared spectroscopy) to carry out chemical analysis of molecular changes during the bitumen aging process [9]. Indexes of I C=O and I S=O were defined and successfully used to characterize the changes of functional groups.…”

Section: Introductionmentioning

confidence: 99%

Study of the Diffusion of Rejuvenators and Its Effect on Aged Bitumen Binder

Xiao

Wang

et al. 2017

Applied Sciences

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Aged asphalt mixture is heavily involved in pavement maintenance and renewed construction because of the development of recycling techniques. The aged bitumen binder has partially lost its viscous behavior. Rejuvenators are therefore designed and used in this recycling procedure to enhance the behavior of such aged reclaimed bitumen. However, tests have not yet been clearly specified to understand the diffusion characteristics of rejuvenators in aged bitumen. In this research, molecular dynamic simulation is proposed and conducted with Materials Studio software to study the diffusion behavior of rejuvenators in aged bitumen at the molecular level. Two rejuvenators, named R-1 and R-2, were included. The difference between these two rejuvenators is their chemical composition of C=O. The diffusion coefficient is determined by studying the molecular movement. Results illustrate that the proposed models can be used to study the diffusion of rejuvenators in aged bitumen sufficiently. In the meantime, a dynamic shear rheometer (DSR) is used to evaluate the recovery influence on aged bitumen resulting from rejuvenators. The experimental results strengthen the model simulations and indicate that the aging index of bitumen has a significant influence on the rejuvenating effect. Research results indicate that rejuvenators have a sufficient rejuvenating effect on the long-term aged bitumen and a limited effect on short-term aged bitumen.

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Section: Introductionmentioning

confidence: 99%

Study of the Diffusion of Rejuvenators and Its Effect on Aged Bitumen Binder

Xiao

Wang

et al. 2017

Applied Sciences

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“…For this research, one SBS-modified bitumen and a commonly used 50/70 pen-graded neat bitumen were used producing in both asphalt mixtures specimens and mastics samples. It is worth mentioning that the SBS polymer-modified bitumen (3% in weight of bitumen) has been described as type P by Dondi et al (2016). The characteristics of the bitumens were evaluated and shown in Table 4.…”

Section: Bindersmentioning

confidence: 99%

Experimental application of waste glass powder filler in recycled dense-graded asphalt mixtures

Simone

Mazzotta

Eskandarsefat

et al. 2017

Road Materials and Pavement Design

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This paper presents laboratory study results, including both bituminous mastics and mixtures tests, to assess the use of glass powder (GP) as possible surrogate to limestone filler in recycled dense-graded asphalt mixtures. To achieve a comprehensive approach, the analysis has been divided into three parts including filler, mastics and mixture characterisation. The GP has been completely studied with chemical and physical tests to compare the fundamental characteristics to the commonly used limestone filler. In the second part, rheological tests using the Dynamic Shear Rheometer has been implemented to evaluate fillers interaction with not modified and modified bitumen. Finally, the mechanical properties of the asphalt mixtures containing GP filler were investigated in terms of indirect tensile strength, indirect tensile stiffness modulus and creep characteristics. According to the obtained results, GP filler provided comparable values to limestone filler within both mastic and mixture study. It is noteworthy that from the permanent deformation analysis, both MSCR and RLAT tests confirmed the improvement of rutting resistance with using GP filler.

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“…Hot recycling, in which virgin materials and RAP are combined, is the most widely techniques that is used for mixing RAP in new HMA [4]. The percentage of blended RAP with new asphalt mixture are determined based on the production process, paving technology and the RAP properties, [6]. In many cases, specifications do not let engineers to use high percentages of RAP.…”

Section: Introductionmentioning

confidence: 99%

Effects of Additive Materials on Indirect Tensile Strength and Moisture Sensitivity of Recycled Asphalt Pavement (RAP)

Ebrahim¹,

Karim²

2019

KJAR

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Using reclaimed asphalt pavement with additives as part of new road construction has economic and environmental advantages. As an attempt to preserve aggregate resources and save money, and knowing the effects of the selected additive materials, this study was done in Sulaimani City. The samples of the RAP were selected from the Sulaimani municipality stockpiles. The ignition and centrifuge testing machines were used to separate the aggregate and binder of the RAP. Based on the standard deviation of the obtained asphalt content, the blend was decided to be 40% RAP and 60% new material. The aggregate tests were conducted to evaluate the characteristics of the PAR aggregate. The performance grade test was done for the reclaimed asphalt binder. Three types of additives, which were Styrene Butadiene-Styrene (SBS), Crumb Rubber (CR), and Polypropylene (PP), mixed with the reclaimed asphalt binder with three different percentages of the binder which were 3%, 5%, and 7%. Indirect Tensile Strength (ITS) test was performed to the conditioned and unconditioned mixtures. To evaluate the effects of additives on the moisture sensitivity of the reclaimed mixtures, ITS Ratios were obtained. Most of the percentages of additives decreased the ITS of the conditioned and unconditioned samples. The only percentage of the additive material increased the ITS was 5% of PP in conditioned case. However, additives did not benefit the ITS, they benefited the ITSR greatly. The best obtained ITSR for each additive material was 7% SBS, 3% CR, and 5% PP that had 99.71%, 97.1%, and 90.7%, respectively.

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Evaluation of different short term aging procedures with neat, warm and modified binders

Cited by 60 publications

References 9 publications

Study of the Diffusion of Rejuvenators and Its Effect on Aged Bitumen Binder

Study of the Diffusion of Rejuvenators and Its Effect on Aged Bitumen Binder

Experimental application of waste glass powder filler in recycled dense-graded asphalt mixtures

Effects of Additive Materials on Indirect Tensile Strength and Moisture Sensitivity of Recycled Asphalt Pavement (RAP)

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