Laboratory investigation of high-temperature functional characterization of organo-modified nanoclay-enhanced bitumen
Functional properties are critical requirements for the efficacy of any modifiers used in bitumen modification. Recently, nanoclay has garnered significant attention as a pivotal option for improving bitumen performance. This research examines crucial functional attributes, including dispersion, pha...
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Elsevier
2025-03-01
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| Series: | Results in Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025000702 |
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| author | Hazratullah Paktin M. Kumar V. Vinayaka Ram Siksha Swaroopa Kar |
| author_facet | Hazratullah Paktin M. Kumar V. Vinayaka Ram Siksha Swaroopa Kar |
| author_sort | Hazratullah Paktin |
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| description | Functional properties are critical requirements for the efficacy of any modifiers used in bitumen modification. Recently, nanoclay has garnered significant attention as a pivotal option for improving bitumen performance. This research examines crucial functional attributes, including dispersion, phase separation at high temperatures, temperature susceptibility, and the potential aging resistivity of bitumen modified with organo-modified nanoclay (OMNC). Different percentages of OMNC (0 % to 8 % at a 2 % increment) were used by weight of control VG-30 bitumen. Scanning electron microscopy (SEM) was used as a conventional method for OMNC dispersion, while viscosity measurements and frequency sweep tests were conducted to indirectly assess the dispersion. Additionally, temperature susceptibility was evaluated through penetration index (PI) values. Conventionally applied softening point (SP) test and Multiple Stress Creep Recovery (MSCR) test data were used for phase separation purposes. SEM images, viscosity, and the Superpave rutting parameter (G*/sinδ) indicated that OMNC up to 8 % disperses well in the bitumen matrix. Further, the increment in softening point (ISP) was dropped from 4.6 °C to 2.5 °C with 8 % OMNC, while the aging index (AI) based upon shear modulus (G*) and phase angle (δ) were reduced from 2.4 to 1.7 and 2.9 to 1.1, respectively, at 80 °C, which revealed a constructive influence of OMNC on aging resistance. Moreover, the study assessed stability at high temperatures through SP and MSCR tests. Both SP and MSCR exhibited a satisfactorily steady nature of OMNC at elevated temperature storage conditions. Lastly, improved rutting performance was seen with addition of OMNC to bitumen binders. |
| format | Article |
| id | doaj-art-9a94b9b23b5b422480587369faf95719 |
| institution | Kabale University |
| issn | 2590-1230 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
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| series | Results in Engineering |
| spelling | doaj-art-9a94b9b23b5b422480587369faf957192025-01-12T05:25:41ZengElsevierResults in Engineering2590-12302025-03-0125103982Laboratory investigation of high-temperature functional characterization of organo-modified nanoclay-enhanced bitumenHazratullah Paktin0M. Kumar1V. Vinayaka Ram2Siksha Swaroopa Kar3Department of Civil Engineering, University College of Engineering, Osmania University, Hyderabad, Telangana 500007, India; Department of Civil Engineering, Paktia University, Gardez, Paktia, Afghanistan; Corresponding author at: Department of Civil Engineering, Paktia University, Gardez, Paktia, Afghanistan.Department of Civil Engineering, University College of Engineering, Osmania University, Hyderabad, Telangana 500007, IndiaDepartment of Civil Engineering, Birla Institute of Technology and Science-Pilani, Hyderabad Campus, Hyderabad 500 078, IndiaFlexible Pavement Division, CSIR-CRRI, New Delhi 110025, IndiaFunctional properties are critical requirements for the efficacy of any modifiers used in bitumen modification. Recently, nanoclay has garnered significant attention as a pivotal option for improving bitumen performance. This research examines crucial functional attributes, including dispersion, phase separation at high temperatures, temperature susceptibility, and the potential aging resistivity of bitumen modified with organo-modified nanoclay (OMNC). Different percentages of OMNC (0 % to 8 % at a 2 % increment) were used by weight of control VG-30 bitumen. Scanning electron microscopy (SEM) was used as a conventional method for OMNC dispersion, while viscosity measurements and frequency sweep tests were conducted to indirectly assess the dispersion. Additionally, temperature susceptibility was evaluated through penetration index (PI) values. Conventionally applied softening point (SP) test and Multiple Stress Creep Recovery (MSCR) test data were used for phase separation purposes. SEM images, viscosity, and the Superpave rutting parameter (G*/sinδ) indicated that OMNC up to 8 % disperses well in the bitumen matrix. Further, the increment in softening point (ISP) was dropped from 4.6 °C to 2.5 °C with 8 % OMNC, while the aging index (AI) based upon shear modulus (G*) and phase angle (δ) were reduced from 2.4 to 1.7 and 2.9 to 1.1, respectively, at 80 °C, which revealed a constructive influence of OMNC on aging resistance. Moreover, the study assessed stability at high temperatures through SP and MSCR tests. Both SP and MSCR exhibited a satisfactorily steady nature of OMNC at elevated temperature storage conditions. Lastly, improved rutting performance was seen with addition of OMNC to bitumen binders.http://www.sciencedirect.com/science/article/pii/S2590123025000702NanoclayBitumenStorage stabilityAgeingTemperature susceptibility |
| spellingShingle | Hazratullah Paktin M. Kumar V. Vinayaka Ram Siksha Swaroopa Kar Laboratory investigation of high-temperature functional characterization of organo-modified nanoclay-enhanced bitumen Results in Engineering Nanoclay Bitumen Storage stability Ageing Temperature susceptibility |
| title | Laboratory investigation of high-temperature functional characterization of organo-modified nanoclay-enhanced bitumen |
| title_full | Laboratory investigation of high-temperature functional characterization of organo-modified nanoclay-enhanced bitumen |
| title_fullStr | Laboratory investigation of high-temperature functional characterization of organo-modified nanoclay-enhanced bitumen |
| title_full_unstemmed | Laboratory investigation of high-temperature functional characterization of organo-modified nanoclay-enhanced bitumen |
| title_short | Laboratory investigation of high-temperature functional characterization of organo-modified nanoclay-enhanced bitumen |
| title_sort | laboratory investigation of high temperature functional characterization of organo modified nanoclay enhanced bitumen |
| topic | Nanoclay Bitumen Storage stability Ageing Temperature susceptibility |
| url | http://www.sciencedirect.com/science/article/pii/S2590123025000702 |
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