Rheological and chemical evaluation of aging in 100% reclaimed asphalt mixtures containing rejuvenators

Rathore, Mukul; Haritonovs, Viktors; Meri, Remo Merijs; Zaumanis, Mārtiņš

doi:10.1016/j.conbuildmat.2021.126026

Cited by 32 publications

(6 citation statements)

References 44 publications

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“…TO is a chemical by-product derived from the renewable raw material used in the paper industry. It is an amalgam of both fatty and rosin acids (17). It can act like a softener as well as a dispersant of the RAP bitumen.…”

Section: Tall Oil (To)mentioning

confidence: 99%

Effect of aging on reclaimed asphalt pavement and rejuvenators

Aeron

Aggarwal

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Reclaimed Asphalt Pavement (RAP) material primarily consists of extracted asphalt concretes from the existing road infrastructure. It comprises 2 major non-renewable resources, i.e., aggregates and bituminous binder and their conscious use can ensure the sustainability of bituminous pavement construction. In this study, more focus is given to the asphalt binder, which is extracted from RAP. It has been tried to replace more and more new virgin binders with recycled RAP binders. But to counteract the higher stiffness of the RAP binder, it is rejuvenated to achieve strength higher or equivalent to the target binder. To have confidence in the efficacy of the RAP binder and rejuvenator in unaged and aged conditions, different combinations of blends are made and tested in aged as well as unaged conditions. In this study, Two RAP sources with and without virgin binder are rejuvenated with two rejuvenators. Physio-rheological tastings are done on each same. Based on achieved results aging index of all the blends is found. These results authenticate the aging properties of RAP binder as well as rejuvenators.

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Section: Tall Oil (To)mentioning

confidence: 99%

Effect of aging on reclaimed asphalt pavement and rejuvenators

Aeron

Aggarwal

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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“…The asphalt and aggregate mixes affect the energy characteristics. The findings of study by Rathore et al (2022) [9] indicate that various rejuvenators exhibit unique aging patterns, underscoring the significance of evaluating the durability of bitumen when choosing a suitable rejuvenating agent. The utilization of the Condition Number (CN) method plays a crucial role in the selection of an optimal combination of probe liquids to assess the SFE of bitumen is studied by Mishra et al (2020) [10].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of moisture susceptibility of reclaimed asphalt binder using SFE approach

Bhoj,

Dare,

Hedaoo

2024

IOP Conf. Ser.: Earth Environ. Sci.

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Reclaimed Asphalt Pavement (RAP) refers to recycled pavement materials consisting of asphalt and aggregates. One of the use of RAP is as a material for new asphalt pavements. It can combine with new asphalt and aggregates to create a high-quality, durable road surface. This process reduces the amount of virgin material required in the production of new asphalt. It is investigated how RAP proportion and aggregate type affect moisture-induced deterioration in asphalt mixes. When the tensile strength of the asphalt binder deteriorates, or bonding failure appears at the asphalt binder-aggregate interface as a result of moisture, this is known as Moisture-induced damage. Investigating the risk of moisture-induced degradation in the asphalt binder-aggregate system by using the Surface Free Energy method (SFE). This method directly deals with the adhesion and debonding of asphalt binder and particles in the presence of moisture. The SFE parameters of VG-30 asphalt binder blended with various quantities of RAP binder (30%, 40%, and 50%) were measured using a Contact Angle measuring instrument. Work of adhesion, work of cohesion, wettability, and energy ratio were the SFE metrics studied. The results concluded that for VG-30 asphalt binders and aggregates, resistance to moisture-induced damage improved as the RAP level increased, particularly at higher RAP percentages. Furthermore, it was discovered that higher aggregate total SFE values corresponded to lower energy ratio values. As a result, a high aggregate total SFE component could make moisture-related damage to the mix more likely. According to the energy ratio statistics, using the binder with basalt provides more resistance to moisture damage than limestone and gravel.

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“…Encapsulated rejuvenators (i.e., capsules) are used to revert the impact of ageing on the physical and rheological properties of the bitumen. The encapsulated oils promote a rejuvenation based on the softening of the aged bitumen in all the pavement layers [ 2 ], restoring the (physical) asphaltenes/maltenes ratio of the aged bitumen [ 15 , 16 ]. Its working principle is based on the capsules being activated when a microcrack starts to propagate inside the aged bituminous material next to them, initiating a rheological rejuvenation process.…”

Section: Introductionmentioning

confidence: 99%

Optimised Sunflower Oil Content for Encapsulation by Vibrating Technology as a Rejuvenating Solution for Asphalt Self-Healing

et al. 2023

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This study aimed to determine an optimal dosage of sunflower oil (i.e., Virgin Cooking Oil, VCO) as a rejuvenator for asphalt self-healing purposes, evaluating its effect on the chemical (carbonyl, and sulfoxide functional groups), physical (penetration, softening point, and viscosity), and rheological (dynamic shear modulus, and phase angle) properties of long-term aged (LTA) bitumen. Five concentrations of sunflower oil (VCO) were used: 1%, 2%, 3%, 4%, and 5% vol. of LTA bitumen. VCO was encapsulated in alginate biopolymer under vibrating jet technology using three biopolymer:oil (B:O) mass ratios: 1:1, 1:5, and 1:9. The physical, thermal, and mechanical properties of the capsules were studied, as well as their effect on the physical properties of dense asphalt mixtures. The main results showed that an optimal VCO content of 4% vol. restored the chemical, physical, and rheological properties of LTA bitumen to a short-term ageing (STA) level. VCO capsules with B:O ratios of 1:5 presented good thermal and mechanical stability, with high encapsulation efficiency. Depending on the B:O ratio, the VCO capsule dosage to rejuvenate LTA bitumen and asphalt mixtures varied between 5.03–15.3% wt. and 0.24–0.74% wt., respectively. Finally, the capsule morphology significantly influenced the bulk density of the asphalt mixtures.

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Rheological and chemical evaluation of aging in 100% reclaimed asphalt mixtures containing rejuvenators

Cited by 32 publications

References 44 publications

Effect of aging on reclaimed asphalt pavement and rejuvenators

Effect of aging on reclaimed asphalt pavement and rejuvenators

Experimental investigation of moisture susceptibility of reclaimed asphalt binder using SFE approach

Optimised Sunflower Oil Content for Encapsulation by Vibrating Technology as a Rejuvenating Solution for Asphalt Self-Healing

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