Rheological characteristics of unaged and aged epoxidised natural rubber modified asphalt

Al-Mansob, Ramez A.; Ismail, Amiruddin; Yusoff, Nur Izzi Md.; Albrka, Shaban Ismael; Azhari, Che Husna; Karim, Mohamed Rehan

doi:10.1016/j.conbuildmat.2015.10.133

Cited by 55 publications

(27 citation statements)

References 20 publications

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“…ENR-modified asphalts were produced by mixing 3, 6, 9, and 12% ENR (by weight of asphalt) with the base asphalt using a high shear mixer at 160°C (±1°C) under 4000 rpm for 60, 62, 66, and 66 min, respectively [ 21 ]. ENR was added to the asphalt after temperature stabilization at 160°C.…”

Section: Methodsmentioning

confidence: 99%

Engineering characterisation of epoxidized natural rubber-modified hot-mix asphalt

et al. 2017

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Road distress results in high maintenance costs. However, increased understandings of asphalt behaviour and properties coupled with technological developments have allowed paving technologists to examine the benefits of introducing additives and modifiers. As a result, polymers have become extremely popular as modifiers to improve the performance of the asphalt mix. This study investigates the performance characteristics of epoxidized natural rubber (ENR)-modified hot-mix asphalt. Tests were conducted using ENR–asphalt mixes prepared using the wet process. Mechanical testing on the ENR–asphalt mixes showed that the resilient modulus of the mixes was greatly affected by testing temperature and frequency. On the other hand, although rutting performance decreased at high temperatures because of the increased elasticity of the ENR–asphalt mixes, fatigue performance improved at intermediate temperatures as compared to the base mix. However, durability tests indicated that the ENR–asphalt mixes were slightly susceptible to the presence of moisture. In conclusion, the performance of asphalt pavement can be enhanced by incorporating ENR as a modifier to counter major road distress.

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Section: Methodsmentioning

confidence: 99%

Engineering characterisation of epoxidized natural rubber-modified hot-mix asphalt

et al. 2017

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“…Ductility is a method to indirectly evaluate the tensile cohesive property of asphalt. It is the distance in centimeters to which the sample can be elongated before breaking when two ends of a sample are pulled apart at a specified temperature and speed [22]. In this study, ductility of modified asphalt was tested using a ductility test instrument (LYY-7, Beijing Zhonghangkegong Instrument Co., Ltd., Beijing, China) at 15 • C and a speed of 5 cm/min according to ASTM D113.…”

Section: Characterization Methodsmentioning

confidence: 99%

“…Viscosity reflects the flow characteristics of asphalt, which directly affects the workability of the asphalt mixture [14,22]. A Brookfield viscometer (SD-0625, Shanghai Geology Instrument Institute, China) was used to measure the rotational viscosity of crumb rubber and diatomite compound modified asphalt at 135 • C according to ASTM D4402.…”

Section: Characterization Methodsmentioning

confidence: 99%

Short-Term Aging Effect on Properties of Sustainable Pavement Asphalts Modified by Waste Rubber and Diatomite

Liu

Jiao

et al. 2017

Sustainability

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Waste utilization has gained more and more interest. In this study, crumb rubber and diatomite were used to modify asphalt binder and the short-term aging effects on the properties of modified asphalts were evaluated. Three kinds of modified asphalt were prepared; they are diatomite modified asphalt (DA), crumb rubber modified asphalt (RA), and diatomite and crumb rubber compound modified asphalt (DRA). Thin film oven test (TFOT) was used to simulate short-term aging in the laboratory. Penetration, softening points, ductility, viscosity, elastic recovery, low temperature creep, and rutting susceptibility were tested and analyzed before and after TFOT. The results indicated that the softening point, viscosity, elastic recovery, creep stiffness, and G*/sinδ of DA, RA, and DRA are all linearly increased with increasing age, while the penetration and ductility are linearly decreased with increasing age. High temperature properties of asphalt are obviously improved by the addition of crumb rubber. Low temperature properties of asphalt are affected more seriously by the addition of diatomite. DRA could combine the advantages of diatomite and crumb rubber and achieve better performance in short-term aging resistance than DA and RA.

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“…It is favorable that AC demonstrates stiff behavior at high temperatures and low frequencies to prevent permanent deformation as well as elastic behavior at low temperatures and high frequencies to prevent fatigue cracking failures (1). Additionally, AC is required to be resistant to aging and it should poses strong adhesion properties for achieving more durable AC in order to minimizing the maintenance cost and to increasing the service life of pavement (2). Virgin asphalt may not always ensure desired performance across the entire service life.…”

Section: Introductionmentioning

confidence: 99%

The High Temperature Performance Evaluation of Polymer/Nanocomposite Modified Asphalt Cement

2022

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The current study focuses on the effect of Acrylate-styrene-acrylonitrile (ASA)/Nanosilica (Si) modified binders on the complex modulus (G*) and rutting resistance parameters (G*/ sinδ) of Asphalt Cement (AC). Four different blends including the base binder and the polymer nanocomposites which were formed by blending 5% ASA to base binder with the addition of nanosilica at 3, 5 and 7% by the weight were the subject of investigations. Conventional and Dynamic Shear Rheometer (DSR) testing procedures were conducted as well as morphology analysis using Fourier Transform Infrared Spectroscopy (FT-IR). The rheological characteristics of AC were analysed by master curves, isochronal plots and rutting resistance parameter plots. Test results revealed that G* and G*/ sinδ of all modified samples were significantly enhanced compared to the base binder. Multiple Stress Creep Recovery Test (MSCRT) conducted at 100 Pa and 3200 Pa showed that, non-recoverable compliance was reduced and elastic recovery of modified binders were improved. Optimum concentration was found to be 5% ASA/Si composite, as further addition of polymer nanocomposite resulted in lower enhancement in the rheological properties of modified AC due to the occurrence of agglomeration between the composite and the base binder.

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Rheological characteristics of unaged and aged epoxidised natural rubber modified asphalt

Cited by 55 publications

References 20 publications

Engineering characterisation of epoxidized natural rubber-modified hot-mix asphalt

Engineering characterisation of epoxidized natural rubber-modified hot-mix asphalt

Short-Term Aging Effect on Properties of Sustainable Pavement Asphalts Modified by Waste Rubber and Diatomite

The High Temperature Performance Evaluation of Polymer/Nanocomposite Modified Asphalt Cement

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