Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2022 Oct 24;15(21):7455.
doi: 10.3390/ma15217455.

Research on High-Temperature Evaluation Indexes and Performance of Qingchuan Rock-SBS Composite Modified Asphalt

Yan Hao  1 , Yali Ye  1 , Chuanyi Zhuang  1 , Fengjian Hou  2
Affiliations

Research on High-Temperature Evaluation Indexes and Performance of Qingchuan Rock-SBS Composite Modified Asphalt

Yan Hao et al. Materials (Basel). .

Abstract

The phenomenon of structural destabilization damage to asphalt pavement is becoming increasingly serious as a result of high temperatures and heavy traffic. Considering the advantages of Qingchuan rock asphalt (QRA) in its durability, high-temperature rutting resistance, and good compatibility with asphalt, it was proposed to compound rock asphalt with SBS to ameliorate the high-temperature performance of asphalt. In this study, DSR and BBR were used to determine the rheological properties of Qingchuan rock-modified asphalt (QRMA) and Qingchuan rock-SBS-modified asphalt (QRA-SBSMA), and the optimum blending amount of rock asphalt was determined based on the PG classification results. Secondly, four different structures of '30 mm AC-10 upper layer (70-A, QRMA, SBSMA, QRA-SBSMA) + 50 mm AC-16 lower layer (70-A)' double-layer composite specimens were prepared. Multiple high-temperature performance evaluation indexes (G*/sinδ, Ds, rutting depth, micro-strain, Fn, modulus) were used to assess the improvement effect of QRA. Finally, using a 1/3 scale accelerated loading testing machine, we simulated high-temperature, water, and high-temperature coupled environments to assess the impact of high temperature and water on the performance of QRMA and QRA-SBSMA, respectively. The findings demonstrated that QRA can increase the PG classification of 70-A and SBSMA as well as its resistance to high-temperature deformation. Multi-index comprehensive evaluation methods were used to consummate the asphalt high-temperature evaluation system. The QRA-SBSMA had the smallest rutting depth and creep rate and the largest dynamic modulus, characterizing its ability to optimally resist high-temperature rutting and deformation.

Keywords: Qingchuan rock asphalt; double-layer composite structure; high-temperature evaluation; multiple evaluation indexes; road engineering.

PubMed Disclaimer

Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Modified asphalt fluorescence results: (a) dispersion in SBSMA; (b) crosslinking with SBSMA.
Figure 2
Figure 2
(a) Accelerated loading equipment; (b) testing tank.
Figure 3
Figure 3
Rutting factor testing results:(a) QRMA; (b) QRA-SBSMA.
Figure 4
Figure 4
QRMA BBR results: (a) creep stiffness; (b) m-value.
Figure 5
Figure 5
QRA-SBSMA BBR results: (a) creep stiffness; (b) m-value.
Figure 6
Figure 6
Rutting depth results over time.
Figure 7
Figure 7
Comparison of rolling times and deformation of different types of mixtures.
Figure 8
Figure 8
Creep testing results: (a) 30 °C; (b) 45 °C; (c) 60 °C; (d) Fn value.
Figure 8
Figure 8
Creep testing results: (a) 30 °C; (b) 45 °C; (c) 60 °C; (d) Fn value.
Figure 9
Figure 9
Modulus change results: (a) 30 °C, (b) 45 °C, (c) 55 °C, (d) 60 °C.
Figure 9
Figure 9
Modulus change results: (a) 30 °C, (b) 45 °C, (c) 55 °C, (d) 60 °C.
Figure 10
Figure 10
Accelerated loading testing rutting depth comparison.
Figure 11
Figure 11
Rutting depth deformation pattern.
See this image and copyright information in PMC

References

    1. Wang W.T., Zhao K., Li J.F. Characterization of dynamic response of asphalt pavement in dry and saturated conditions using the full-scale accelerated loading test. Constr. Build. Mater. 2021;312:125355. doi: 10.1016/j.conbuildmat.2021.125355. - DOI
    1. Meroni F., Flintsch G.W., Habbouche J. Three-level performance evaluation of high RAP asphalt surface mixes. Constr. Build. Mater. 2021;309:125164. doi: 10.1016/j.conbuildmat.2021.125164. - DOI
    1. Ren Y.F., Chen M.Z., Yang T.Y. Effect of Steel Slag Aggregate on Pavement and Flame-Retardant Performance of Warm-Mixed Flame-Retardant Asphalt Concrete. Materials. 2021;14:635. doi: 10.3390/ma14030635. - DOI - PMC - PubMed
    1. Mana M., Gholamali S., Mohammad A. Evaluation of fatigue and rutting properties of asphalt binder and mastic modified by synthesized polyurethane. J. Traffic Transp. Eng. 2021;8:1036–1048.
    1. Yan K.Z., Liu W.Y., You L.Y. Evaluation of waste cooling oil and European Rock Asphalt modified asphalt with laboratory tests and economic cost comparison. J. Clean. Prod. 2021;310:127364. doi: 10.1016/j.jclepro.2021.127364. - DOI

LinkOut - more resources