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Abstract

To study the road performance of large graded macadam such as compressive and deformation performance, this paper adopted the step-by-step filling method and i method to form compact aggregate-skeleton density gradation, and the gyratory and vibration compaction method was combined to compact and form the large graded macadam mixture. Meanwhile, CBR and compressive modulus of resilience tests were conducted on the formed specimens, and then their test data was compared and analyzed with the macadam specimens of conventional particle size. The results show that the specimens formed by designing coarse aggregates using the step-by-step filling method and fine aggregates using the i method with large macadam mixture can achieve higher compaction density. In reasonable gradation conditions, the mechanical and skeleton properties of large graded macadam specimens are superior to those of graded macadam specimens with conventional particle size. Specifically, the California bearing ratio (RCBR) of large graded macadam specimens can reach 324%, and the compressive modulus of resilience can reach 358.1 MPa. The specimens formed by gyratory and vibration compaction have better compaction density and mechanical properties than those formed by other forming methods.

Publication Date

11-8-2022

DOI

10.14048/j.issn.1671-2579.2022.05.029

First Page

161

Last Page

166

Submission Date

April 2025

Reference

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