Surface-Modified Nanoclays for Enhancing Resistance to Moisture Damage in Hot Mix Asphalt

Ashraf Rahim; Amro El Badawy; Travis Cox

doi:doi:10.11648/j.ajce.20241203.11

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Surface-Modified Nanoclays for Enhancing Resistance to Moisture Damage in Hot Mix Asphalt

Ashraf Rahim^*

, Amro El Badawy

, Travis Cox

Published in American Journal of Civil Engineering (Volume 12, Issue 3)

Received: 27 February 2024 Accepted: 25 March 2024 Published: 17 May 2024

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Abstract

Previous research indicated that nanomaterials have potential in improving pavement properties, particularly moisture resistance. This study evaluated the effectiveness of nanoclays in enhancing the resistance of Hot Mix Asphalt (HMA) to moisture damage and compared its performance to standard modifiers. Asphalt binder modified using four additives was tested using a Dynamic Shear Rheometer (DSR) before and after being aged in a Rolling Thin Film Oven (RTFO): two surface-modified nanoclays and two liquid anti-stripping chemicals (HP+ and LOF 6500). The DSR and RTFO tests showed that the two nanoclays had a stiffening effect on the binder, while both liquid antistripping agents had the opposite effect, decreasing both the elastic and complex modulus of the binder. After RTFO aging, similar trends were observed, except the binder had become much stiffer in all cases. HMA designed employing the Superpave mix design procedure was tested for moisture sensitivity in accordance with AASHTO T-283. The dry tensile strength for the two nanoclays and LOF 6500 modified mixes were higher than the control mix. However, all modified mixes resulted in wet tensile strengths that were higher than the control. The tensile strength ratios for all modified mixes were also higher than the control and exceeded the Superpave mix design method minimum of 0.80. Evaluation of these additives in the field would further benefit asphalt pavement research.

Published in	American Journal of Civil Engineering (Volume 12, Issue 3)
DOI	10.11648/j.ajce.20241203.11
Page(s)	76-85
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Nanoclay, Moisture Resistance, Hot Mix Asphalt, Anti-Stripping

References

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APA Style

Rahim, A., Badawy, A. E., Cox, T. (2024). Surface-Modified Nanoclays for Enhancing Resistance to Moisture Damage in Hot Mix Asphalt. American Journal of Civil Engineering, 12(3), 76-85. https://doi.org/10.11648/j.ajce.20241203.11

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ACS Style

Rahim, A.; Badawy, A. E.; Cox, T. Surface-Modified Nanoclays for Enhancing Resistance to Moisture Damage in Hot Mix Asphalt. Am. J. Civ. Eng. 2024, 12(3), 76-85. doi: 10.11648/j.ajce.20241203.11

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AMA Style

Rahim A, Badawy AE, Cox T. Surface-Modified Nanoclays for Enhancing Resistance to Moisture Damage in Hot Mix Asphalt. Am J Civ Eng. 2024;12(3):76-85. doi: 10.11648/j.ajce.20241203.11

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@article{10.11648/j.ajce.20241203.11,
  author = {Ashraf Rahim and Amro El Badawy and Travis Cox},
  title = {Surface-Modified Nanoclays for Enhancing Resistance to Moisture Damage in Hot Mix Asphalt
},
  journal = {American Journal of Civil Engineering},
  volume = {12},
  number = {3},
  pages = {76-85},
  doi = {10.11648/j.ajce.20241203.11},
  url = {https://doi.org/10.11648/j.ajce.20241203.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajce.20241203.11},
  abstract = {Previous research indicated that nanomaterials have potential in improving pavement properties, particularly moisture resistance. This study evaluated the effectiveness of nanoclays in enhancing the resistance of Hot Mix Asphalt (HMA) to moisture damage and compared its performance to standard modifiers. Asphalt binder modified using four additives was tested using a Dynamic Shear Rheometer (DSR) before and after being aged in a Rolling Thin Film Oven (RTFO): two surface-modified nanoclays and two liquid anti-stripping chemicals (HP+ and LOF 6500). The DSR and RTFO tests showed that the two nanoclays had a stiffening effect on the binder, while both liquid antistripping agents had the opposite effect, decreasing both the elastic and complex modulus of the binder. After RTFO aging, similar trends were observed, except the binder had become much stiffer in all cases. HMA designed employing the Superpave mix design procedure was tested for moisture sensitivity in accordance with AASHTO T-283. The dry tensile strength for the two nanoclays and LOF 6500 modified mixes were higher than the control mix. However, all modified mixes resulted in wet tensile strengths that were higher than the control. The tensile strength ratios for all modified mixes were also higher than the control and exceeded the Superpave mix design method minimum of 0.80. Evaluation of these additives in the field would further benefit asphalt pavement research.
},
 year = {2024}
}

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TY  - JOUR
T1  - Surface-Modified Nanoclays for Enhancing Resistance to Moisture Damage in Hot Mix Asphalt

AU  - Ashraf Rahim
AU  - Amro El Badawy
AU  - Travis Cox
Y1  - 2024/05/17
PY  - 2024
N1  - https://doi.org/10.11648/j.ajce.20241203.11
DO  - 10.11648/j.ajce.20241203.11
T2  - American Journal of Civil Engineering
JF  - American Journal of Civil Engineering
JO  - American Journal of Civil Engineering
SP  - 76
EP  - 85
PB  - Science Publishing Group
SN  - 2330-8737
UR  - https://doi.org/10.11648/j.ajce.20241203.11
AB  - Previous research indicated that nanomaterials have potential in improving pavement properties, particularly moisture resistance. This study evaluated the effectiveness of nanoclays in enhancing the resistance of Hot Mix Asphalt (HMA) to moisture damage and compared its performance to standard modifiers. Asphalt binder modified using four additives was tested using a Dynamic Shear Rheometer (DSR) before and after being aged in a Rolling Thin Film Oven (RTFO): two surface-modified nanoclays and two liquid anti-stripping chemicals (HP+ and LOF 6500). The DSR and RTFO tests showed that the two nanoclays had a stiffening effect on the binder, while both liquid antistripping agents had the opposite effect, decreasing both the elastic and complex modulus of the binder. After RTFO aging, similar trends were observed, except the binder had become much stiffer in all cases. HMA designed employing the Superpave mix design procedure was tested for moisture sensitivity in accordance with AASHTO T-283. The dry tensile strength for the two nanoclays and LOF 6500 modified mixes were higher than the control mix. However, all modified mixes resulted in wet tensile strengths that were higher than the control. The tensile strength ratios for all modified mixes were also higher than the control and exceeded the Superpave mix design method minimum of 0.80. Evaluation of these additives in the field would further benefit asphalt pavement research.

VL  - 12
IS  - 3
ER  -

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Author Information

Ashraf Rahim

Civil and Environmental Engineering, California Polytechnic State University, California, USA

Contact Email

http://orcid.org/0000-0001-6983-3383
Amro El Badawy

Civil and Environmental Engineering, California Polytechnic State University, California, USA

Contact Email

http://orcid.org/0000-0002-0060-8716
Travis Cox

Kimley-Horn, Pleasanton, USA

Contact Email

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Plain Text BibTeX RIS

APA Style

Rahim, A., Badawy, A. E., Cox, T. (2024). Surface-Modified Nanoclays for Enhancing Resistance to Moisture Damage in Hot Mix Asphalt. American Journal of Civil Engineering, 12(3), 76-85. https://doi.org/10.11648/j.ajce.20241203.11

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ACS Style

Rahim, A.; Badawy, A. E.; Cox, T. Surface-Modified Nanoclays for Enhancing Resistance to Moisture Damage in Hot Mix Asphalt. Am. J. Civ. Eng. 2024, 12(3), 76-85. doi: 10.11648/j.ajce.20241203.11

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AMA Style

Rahim A, Badawy AE, Cox T. Surface-Modified Nanoclays for Enhancing Resistance to Moisture Damage in Hot Mix Asphalt. Am J Civ Eng. 2024;12(3):76-85. doi: 10.11648/j.ajce.20241203.11

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@article{10.11648/j.ajce.20241203.11,
  author = {Ashraf Rahim and Amro El Badawy and Travis Cox},
  title = {Surface-Modified Nanoclays for Enhancing Resistance to Moisture Damage in Hot Mix Asphalt
},
  journal = {American Journal of Civil Engineering},
  volume = {12},
  number = {3},
  pages = {76-85},
  doi = {10.11648/j.ajce.20241203.11},
  url = {https://doi.org/10.11648/j.ajce.20241203.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajce.20241203.11},
  abstract = {Previous research indicated that nanomaterials have potential in improving pavement properties, particularly moisture resistance. This study evaluated the effectiveness of nanoclays in enhancing the resistance of Hot Mix Asphalt (HMA) to moisture damage and compared its performance to standard modifiers. Asphalt binder modified using four additives was tested using a Dynamic Shear Rheometer (DSR) before and after being aged in a Rolling Thin Film Oven (RTFO): two surface-modified nanoclays and two liquid anti-stripping chemicals (HP+ and LOF 6500). The DSR and RTFO tests showed that the two nanoclays had a stiffening effect on the binder, while both liquid antistripping agents had the opposite effect, decreasing both the elastic and complex modulus of the binder. After RTFO aging, similar trends were observed, except the binder had become much stiffer in all cases. HMA designed employing the Superpave mix design procedure was tested for moisture sensitivity in accordance with AASHTO T-283. The dry tensile strength for the two nanoclays and LOF 6500 modified mixes were higher than the control mix. However, all modified mixes resulted in wet tensile strengths that were higher than the control. The tensile strength ratios for all modified mixes were also higher than the control and exceeded the Superpave mix design method minimum of 0.80. Evaluation of these additives in the field would further benefit asphalt pavement research.
},
 year = {2024}
}

Copy | Download

TY  - JOUR
T1  - Surface-Modified Nanoclays for Enhancing Resistance to Moisture Damage in Hot Mix Asphalt

AU  - Ashraf Rahim
AU  - Amro El Badawy
AU  - Travis Cox
Y1  - 2024/05/17
PY  - 2024
N1  - https://doi.org/10.11648/j.ajce.20241203.11
DO  - 10.11648/j.ajce.20241203.11
T2  - American Journal of Civil Engineering
JF  - American Journal of Civil Engineering
JO  - American Journal of Civil Engineering
SP  - 76
EP  - 85
PB  - Science Publishing Group
SN  - 2330-8737
UR  - https://doi.org/10.11648/j.ajce.20241203.11
AB  - Previous research indicated that nanomaterials have potential in improving pavement properties, particularly moisture resistance. This study evaluated the effectiveness of nanoclays in enhancing the resistance of Hot Mix Asphalt (HMA) to moisture damage and compared its performance to standard modifiers. Asphalt binder modified using four additives was tested using a Dynamic Shear Rheometer (DSR) before and after being aged in a Rolling Thin Film Oven (RTFO): two surface-modified nanoclays and two liquid anti-stripping chemicals (HP+ and LOF 6500). The DSR and RTFO tests showed that the two nanoclays had a stiffening effect on the binder, while both liquid antistripping agents had the opposite effect, decreasing both the elastic and complex modulus of the binder. After RTFO aging, similar trends were observed, except the binder had become much stiffer in all cases. HMA designed employing the Superpave mix design procedure was tested for moisture sensitivity in accordance with AASHTO T-283. The dry tensile strength for the two nanoclays and LOF 6500 modified mixes were higher than the control mix. However, all modified mixes resulted in wet tensile strengths that were higher than the control. The tensile strength ratios for all modified mixes were also higher than the control and exceeded the Superpave mix design method minimum of 0.80. Evaluation of these additives in the field would further benefit asphalt pavement research.

VL  - 12
IS  - 3
ER  -

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