Effects of Calcium Carbonate and Treated Palm Oil Fly Ash on the Rheological Properties of Asphalt Mastic

Abstract:

In sustainable asphalt pavement construction, the proper selection of materials can be a challenging task. This paper focuses on a newly developed asphalt modifier named calcium carbonate (CaCO₃) combined with Treated Palm Oil Fly Ash (TPOFA) to improve the properties of asphalt mastic. The rheological properties of mastic in terms of penetration, softening point, rotational viscosity and Superpave rutting factor using 60/70 asphalt binder blended with 5, 10, 15, 20 % of CaCO₃+TPOFA were calculated to evaluate asphalt binder properties subjected to different aging conditions. The rotational viscometer (RV) was used to evaluate the properties of mastic at test temperatures from 120°C to 170°C. The dynamic shear rheometer (DSR) was used in temperature sweep test from 46°C to 82°C at 6°C increments at 10 rad/sec frequency to measure the G*, δ and Superpave rutting factor G*/sinδ. A one-way ANOVA statistical analysis was used to analyze the results .The test results showed that all asphalt mastic exhibited higher viscosity compared to the base binder. The addition of CaCO₃ +TPOFA increased the G* but reduced the phase angle which indicated improved stiffness of asphalt mastic. Hence, incorporating CaCO₃+TPOFA can potentially improve the rutting resistance of asphalt mastic.

• Periodical: Applied Mechanics and Materials (Volume 802)
• Pages: 321-326
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.802.321
• Online since: October 2015
• Authors: Meor Othman Hamzah*, Foad Mohamed Elkut
• Keywords: Aging Factors, Asphalt Mastic, Complex Shear Modulus, Phase Angle, Viscosity

References

[1] W. G. Buttlar, D. Bozkurt, G. G. Al-Khateeb and A. S. Waldhoff. Understanding asphalt mastic behavior through micromechanics, Journal of the Transportation Research Board. 1681. 1 (1999) 157-169.

DOI: 10.3141/1681-19

[2] A. Zulkati, W. Y. Diew and D. S. Delai. Effects of fillers on properties of asphalt-concrete mixture. Journal of Transportation Engineering138. 7 (2011) 902-910.

DOI: 10.1061/(asce)te.1943-5436.0000395

[3] M. C. Liao, G. Airey and J. S. Chen. Mechanical Properties of Filler-Asphalt Mastics. International Journal of Pavement Research and Technology 6. 5 (2013) 576-581.

[4] J. Read and D. Whiteoak. The shell bitumen handbook. Fifth Edition, Thomas Telford, London, (2003).

[5] M. O. Hamzah and B. Golchin. A laboratory investigation on the rheological properties of asphalt binder containing rediset. Journal of the Eastern Asia Society for Transportation Studies 10. 0 (2013) 1537-1550.

[6] M. O. Hamzah, B. Golchin, A. Jamshidi and E. Chailleux . Evaluation of Rediset for use in warm-mix asphalts a review of the literatures. International Journal of Pavement Engineering ahead-of-print (2014) 1-23.

DOI: 10.1080/10298436.2014.961020

[7] ASTM D5-06. Standard test method for penetration of bituminous materials. West Conshohocken, USA, American Society for Testing and Materials, (2006).

[8] ASTM D36-95. Standard test method for softening point of bitumen. West Conshohocken, USA, American Society for Testing and Materials, (2000).