Triaxial test of hydrated lime on the mechanical properties of hot mix asphalt concrete

Al Ashaibi, Azedin; Wang, Yu; Albayati, Amjad; Weekes, Laurence; Haynes, Jonathan

Abstract

This paper reports on the experimental study, which conducted a series of triaxial tests for the asphalt concrete using hydrated lime as a mineral additive. Three HMA mixes, prepared by the specification for wearing, levelling and base layers, were studied under three different temperatures. The test results have demonstrated that, compared with the control mixes excluding HL, the permanent deformation resistance of the HL modified mixes has significant improvement. The deformation has been reduced at the same load repetition number, meanwhile the flow number has been considerably increased. The degree of improvement in permanent deformation resistance using HL is more pronounced at high stress deviation states and high temperature. The results have also showed that the resilient modulus strongly depends on the temperature and stress deviation while the mixes of HL addition demonstrate having higher stiffness/rigidity. Lastly, mathematical characterization models have been proposed for the measured material properties.

• Presentation Conference Type: Conference Paper (published)
• Conference Name: Sixth International Conference on Sustainable Construction Materials and Technologies (SCMT6)
• Start Date: Jun 9, 2024
• End Date: Jun 14, 2024
• Acceptance Date: Mar 1, 2024
• Online Publication Date: Jun 6, 2024
• Publication Date: Jun 6, 2024
• Deposit Date: Jun 6, 2024
• Publicly Available Date: Jun 11, 2024
• Keywords: Hydrated lime mineral filler; Hot mix asphalt concrete; Pavement permanent deformation; Resilient modulus
• Publisher URL: https://www.scmt-conferences.com/proceedings