Laboratory evaluation of the effect of compaction method and compaction work on the performance of SMA-13 mixture

PLoS One. 2022 Mar 8;17(3):e0265097. doi: 10.1371/journal.pone.0265097. eCollection 2022.

Abstract

The influence of compaction methods such as the Marshall compaction method (MCM), vibration compaction method (VCM) and gyration compaction method (GCM), on the performance of stone mastic asphalt (SMA-13) mixture has yet to be explored. Therefore, to compare the influences of compaction methods and work on the physical and mechanical properties of SMA-13 mixture, the volume parameters, mechanical properties, and gradation changes of SMA-13 mixture specimens prepared under different vibration compaction times, Marshall double-compaction numbers, and gyration compaction numbers were studied. The compaction method for SMA-13 mixture design was also proposed under the principle of optimum properties. Results demonstrate that the asphalt aggregate ratio and compaction work directly affect the volumetric properties (VV, VFA, and VMA) of asphalt mixture specimens while the raw material and mineral aggregate gradation were fixed. The influence of compaction work on physical properties is greater than that of asphalt aggregate ratio. The mechanical strength of VCM and GCM specimens is higher than that of MCM specimens under the same compaction work and the optimum asphalt aggregate ratio. With the increase in compaction work, the mechanical properties of SMA-13 mixture are improved at the same compaction method and the optimum asphalt aggregate ratio. The aggregate gradation of the SMA-13 mixture before and after compacted using VCM and GCM changes minimally compared with that of the SMA-13 mixture compacted by MCM. Thus, the compaction methods of VCM65 and GCM130 were recommended for SMA-13 mixture design.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Minerals*

Substances

  • Minerals

Grants and funding

The project was funded by the Ningbo Transportation Bureau, the Ningbo Communications Planning institute Co., Ltd., and Hubei Provincial Natural Science Foundation of China under grant 2020CFB330, Hubei Superior and Distinctive Discipline Group of “Mechatronics and Automobiles" under grant XKQ2021025. YJ, YZ, and SX cooperated with one another to complete the Ningbo transportation technology project (No.202006) application, which also helped fund the project. YZ and SX receive salary support from Ningbo Communications Planning institute Co., Ltd. The specific roles of this author are articulated in the ‘author contributions’ section. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.