Determining the effects of RH-WMA on the engineering properties of bitumen

Khansaa Mahmoud Mohammed, Ibrahim Khalid Abdalla, Ameen Hadi Mohammed, Faridah Hanim Khairuddin, Ahmad Nazrul Hakimi Ibrahim, Sri Atmaja P. Rosyidi, Mohd Ezree Abdullah, Nur Izzi Md Yusoff

Research output: Contribution to journalArticle

Abstract

This study aims to investigate the engineering properties (i.e., physical, chemical, and adhesion properties) of bitumen incorporated with RH-Warm Mix Asphalt (RH-WMA) additive. Base bitumen with a penetration grade of 80/100 was added with 3.0, 3.5, and 4.0% RH-WMA (by total weight of bitumen). The Response Surface Method (RSM) was used to determine the optimum values of the base bitumen and RH-WMA additive which meet the bitumen specification with penetration and softening point chosen as responses in the design layout. Three solutions of 3.04, 3.55 and 3.91% RH-WMA additive that were obtained from the RSM analysis were selected as the optimal values. Results of the physical tests show that adding RH-WMA increases the penetration and ductility values whilst simultaneously reducing the value for the softening point. Analysis of viscosity at various temperatures shows that RH-WMA additive lowers viscosity when the temperature was raised from 100 to 165 °C. The lower viscosity of the modified binders improves their workability. The result of the Fourier Transform Infrared (FTIR) test shows that there is no complex chemical reaction between the base bitumen and the RH-WMA. The surface free energy (SFE) test conducted on the base bitumen and the RH-WMA modified bitumen shows that the total SFE component of the base bitumen increases when higher amounts of RH-WMA was incorporated. The addition of 3.5% RH-WMA results in the highest SFE value of 24.98 mJ/m2. The increase in the total SFE suggests good adhesion between the bitumen and the aggregates.

Original languageEnglish
Pages (from-to)99-111
Number of pages13
JournalJurnal Teknologi
Volume81
Issue number2
DOIs
Publication statusPublished - 1 Mar 2019

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Asphalt
Free energy
Viscosity
Adhesion
Binders
Ductility
Chemical reactions
Fourier transforms
Physical properties
Infrared radiation
Specifications
Temperature

Keywords

  • Adhesion
  • Response surface method
  • Surface free energy
  • Warm mix asphalt

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Mohammed, K. M., Abdalla, I. K., Mohammed, A. H., Khairuddin, F. H., Ibrahim, A. N. H., Rosyidi, S. A. P., ... Md Yusoff, N. I. (2019). Determining the effects of RH-WMA on the engineering properties of bitumen. Jurnal Teknologi, 81(2), 99-111. https://doi.org/10.11113/jt.v81.12467

Determining the effects of RH-WMA on the engineering properties of bitumen. / Mohammed, Khansaa Mahmoud; Abdalla, Ibrahim Khalid; Mohammed, Ameen Hadi; Khairuddin, Faridah Hanim; Ibrahim, Ahmad Nazrul Hakimi; Rosyidi, Sri Atmaja P.; Abdullah, Mohd Ezree; Md Yusoff, Nur Izzi.

In: Jurnal Teknologi, Vol. 81, No. 2, 01.03.2019, p. 99-111.

Research output: Contribution to journalArticle

Mohammed, KM, Abdalla, IK, Mohammed, AH, Khairuddin, FH, Ibrahim, ANH, Rosyidi, SAP, Abdullah, ME & Md Yusoff, NI 2019, 'Determining the effects of RH-WMA on the engineering properties of bitumen', Jurnal Teknologi, vol. 81, no. 2, pp. 99-111. https://doi.org/10.11113/jt.v81.12467
Mohammed KM, Abdalla IK, Mohammed AH, Khairuddin FH, Ibrahim ANH, Rosyidi SAP et al. Determining the effects of RH-WMA on the engineering properties of bitumen. Jurnal Teknologi. 2019 Mar 1;81(2):99-111. https://doi.org/10.11113/jt.v81.12467
Mohammed, Khansaa Mahmoud ; Abdalla, Ibrahim Khalid ; Mohammed, Ameen Hadi ; Khairuddin, Faridah Hanim ; Ibrahim, Ahmad Nazrul Hakimi ; Rosyidi, Sri Atmaja P. ; Abdullah, Mohd Ezree ; Md Yusoff, Nur Izzi. / Determining the effects of RH-WMA on the engineering properties of bitumen. In: Jurnal Teknologi. 2019 ; Vol. 81, No. 2. pp. 99-111.
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abstract = "This study aims to investigate the engineering properties (i.e., physical, chemical, and adhesion properties) of bitumen incorporated with RH-Warm Mix Asphalt (RH-WMA) additive. Base bitumen with a penetration grade of 80/100 was added with 3.0, 3.5, and 4.0{\%} RH-WMA (by total weight of bitumen). The Response Surface Method (RSM) was used to determine the optimum values of the base bitumen and RH-WMA additive which meet the bitumen specification with penetration and softening point chosen as responses in the design layout. Three solutions of 3.04, 3.55 and 3.91{\%} RH-WMA additive that were obtained from the RSM analysis were selected as the optimal values. Results of the physical tests show that adding RH-WMA increases the penetration and ductility values whilst simultaneously reducing the value for the softening point. Analysis of viscosity at various temperatures shows that RH-WMA additive lowers viscosity when the temperature was raised from 100 to 165 °C. The lower viscosity of the modified binders improves their workability. The result of the Fourier Transform Infrared (FTIR) test shows that there is no complex chemical reaction between the base bitumen and the RH-WMA. The surface free energy (SFE) test conducted on the base bitumen and the RH-WMA modified bitumen shows that the total SFE component of the base bitumen increases when higher amounts of RH-WMA was incorporated. The addition of 3.5{\%} RH-WMA results in the highest SFE value of 24.98 mJ/m2. The increase in the total SFE suggests good adhesion between the bitumen and the aggregates.",
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