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. 2025 Jun 13;18(12):2785.
doi: 10.3390/ma18122785.

Influence of Mineral Powder Content and Gradation on the Aging and High-Temperature Rheological Properties of Styrene-Butadiene-Styrene (SBS) Modified Asphalt

Chengwei Xing  1   2 , Zhibin Chang  1   2 , Bohan Zhu  1   2 , Tian Jin  3 , Qing Ma  4 , Jie Wang  4
Affiliations

Influence of Mineral Powder Content and Gradation on the Aging and High-Temperature Rheological Properties of Styrene-Butadiene-Styrene (SBS) Modified Asphalt

Chengwei Xing et al. Materials (Basel). .

Abstract

This paper aims to explore the influences of the content and gradation of mineral powder on the rheological properties of styrene-butadiene-styrene (SBS) modified asphalt mastic at different aging stages and temperatures. In the experiment, SBS modified asphalt mastic samples with different powder-to-binder ratios (0.6, 0.8, and 1.0) and different mineral powder gradations (500 mesh passing rates of 76.89% and 100%) were prepared. Following aging periods of 5, 25, and 45 h in the pressure aging vessel (PAV), the asphalt underwent comprehensive rheological characterization using a dynamic shear rheometer (DSR). The research shows that mineral powder can boost mastic's deformation resistance and elastic effect. When aged by PAV for 45 h, the powder-to-binder ratio increased from 0.6 to 1.0, and its complex modulus increased by nearly 2.5 times at 58 °C. For SBS modified asphalt mastic of PAV 0 h, the powder-to-binder ratio increased from 0.6 to 1.0 and its phase angle was reduced from 59.6 to 53.2, which indicated that the elasticity of mastic was improved. However, this accelerated the degradation rate of SBS, making the aging process more complex. Fine-grained mineral powder is more effective in enhancing mastic's deformation resistance than coarse-grained mineral powder. The fine-graded mastic had better rutting resistance after 45 h of aging than after 25 h of aging because the mineral powder compensated for the SBS loss-induced elasticity reduction. Smaller mineral powder particles lead to better a mastic anti-aging effect. After 45 h of aging, fine-grained mineral powder offered a better elastic effect. But the ways in which mineral powder and SBS boost mastic elasticity differ greatly. The results of this study provide a reference for optimizing the design of asphalt mixtures.

Keywords: SBS modified asphalt; gradation; mastic; mineral powder; rheological properties.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Aged SBS-modified asphalt mastic samples.
Figure 2
Figure 2
The complex modulus of SBS modified asphalt mastic samples with different powder-to-binder ratios under different temperatures and different degrees of aging.
Figure 3
Figure 3
The phase angles of SBS modified asphalt mastic samples with different powder-to-binder ratios under different temperatures and different degrees of aging.
Figure 4
Figure 4
The R values of SBS modified asphalt mastic samples with different powder-to-binder ratios under different temperatures and degrees of aging.
Figure 5
Figure 5
The Jnr values of SBS modified asphalt mastic samples with different powder-to-binder ratios under different temperatures and degrees of aging.
Figure 6
Figure 6
The master curves of the complex modulus of SBS modified asphalt mastic samples with different powder-to-binder ratios under different conditions: (a) Different degrees of aging; (b) Different powder-to-binder ratios.
Figure 7
Figure 7
The master curves of the phase angle of SBS modified asphalt mastic samples with different powder-to-binder ratios under different conditions: (a) Different degrees of aging; (b) Different powder-to-binder ratios.
Figure 8
Figure 8
The complex modulus of SBS modified asphalt mastic samples with different mineral powder gradations under different conditions.
Figure 9
Figure 9
The phase angle of SBS modified asphalt mastic samples with different mineral powder gradations under different conditions.
Figure 10
Figure 10
The R values of SBS modified asphalt mastic samples with different gradations under different conditions.
Figure 11
Figure 11
The Jnr values of SBS modified asphalt mastic samples with different gradations under different conditions.
Figure 12
Figure 12
The master curves of the phase angles of SBS modified asphalt mastic samples with different gradations under different degrees of aging: (a) Passing rate of 76.89%; (b) Passing rate of 100%.
Figure 13
Figure 13
The master curves of the phase angles of SBS modified asphalt mastic samples with different gradations under four degrees of aging: (a) PAV0h; (b) PAV5h; (c) PAV25h; (d) PAV45h.
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