Size Effect of Hydrated Lime on the Mechanical Performance of Asphalt Concrete

Albayati, Amjad; Wang, Yu; Haynes, Jonathan

Abstract

Despite widespread agreement on the beneficial nature of hydrated lime (HL) addition to asphalt concrete mixes, understanding of the effect of HL particle size is still limited. Previous investigations have focused mainly on two different size comparisons, and so certain guidance for a practical application cannot yet be produced. This study investigates three distinct sizes of HL, in the range of regular, nano, and sub-nano scales, for their effects on the properties of modified asphalt concretes. Five different percentages of HL as a partial replacement of ordinary limestone filler in asphalt concrete mixes were studied for wearing course application purposes. Experimental tests were conducted to evaluate the mechanical properties, including resistance to plastic flow, volumetric properties, moisture susceptibility, resilient modulus, and permanent deformation. The results revealed that a positive correlation exists between the mechanical properties and the fineness of HL particle sizes.

Citation

Albayati, A., Wang, Y., & Haynes, J. (2022). Size Effect of Hydrated Lime on the Mechanical Performance of Asphalt Concrete. Materials, 15(10), 3715. https://doi.org/10.3390/ma15103715

• Journal Article Type: Article
• Acceptance Date: May 19, 2022
• Online Publication Date: May 22, 2022
• Publication Date: May 22, 2022
• Deposit Date: Jun 9, 2022
• Publicly Available Date: Jun 9, 2022
• Journal: Materials
• Publisher: MDPI
• Volume: 15
• Issue: 10
• Pages: 3715
• DOI: https://doi.org/10.3390/ma15103715
• Publisher URL: https://doi.org/10.3390/ma15103715
• Related Public URLs: https://www.mdpi.com/journal/materials