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Abstract

In the current process, the mixing and compaction temperature required for the production of waste rubber powder-modified asphalt (CRMA) is relatively high, which is often improved by adding a warm mixing agent. In order to investigate the influence of the addition of a warm mixing agent on the rutting and fatigue properties of CRMA, two kinds of wax-based warm mixing agents (pine wax and polypropylene wax) were added into CRMA, and the rotary viscosity (RV), dynamic shear rheometer (DSR), multiple stress creep recovery (MSCR), and linear amplitude scanning (LAS) tests were carried out, so as to evaluate the influence of warm mixing agent on rutting and fatigue properties of CRMA. The results show that the viscosity of CRMA can be decreased significantly by adding two kinds of wax-based warm mixing agents. Due to the lower non-recoverable creep compliance (Jnr3.2) and higher strain recovery rate (R), CRMA with 2% polypropylene wax has better rutting resistance than that with 4% and 6% polypropylene wax. LAS test results show that CRMA with 6% pine wax has the longest fatigue life, especially at low strain levels.

Publication Date

11-24-2023

DOI

10.14048/j.issn.1671-2579.2023.05.039

First Page

230

Last Page

235

Submission Date

March 2025

Reference

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