Impacts of Aggregate Gradation on the Volumetric Parameters and Rutting Performance of Asphalt Concrete Mixtures

Li, Weihua; Cao, Weidong; Ren, Xianfu; Lou, Shurong; Liu, Shutang; Zhang, Jizhe

doi:10.3390/ma15144866

Cited by 7 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The coarse aggregate is limestone, the fine aggregate is machine-made sand (0–5 mm), and the filler is limestone powder. Asphalt mixture samples are prepared under the optimum asphalt binder content obtained by the Marshall method [ 21 ]. The aggregate gradation, optimum asphalt binder content, and air-void content of the two asphalt mixtures are shown in Table 2 .…”

Section: Methodsmentioning

confidence: 99%

Characterization of Rutting Damage by the Change of Air-Void Characteristics in the Asphalt Mixture Based on Two-Dimensional Image Analysis

et al. 2022

View full text Add to dashboard Cite

In the process of the rutting test, the air-void characteristics in asphalt mixture specimens are a dynamic change process. It is of great significance to systematically study the correlation between the change of air-void characteristics and the depth of the rutting slab and establish a relationship with damage. In this paper, the air-void information of rutting specimen sections with different loading cycles (500, 1000, 1500, 2000, 2500, and 3000 times) is obtained by two-dimensional image technology. The dynamic change process of the micro characteristics of internal air voids of two graded asphalt mixtures (AC-13 and AC-16) under cyclic wheel load is analyzed, and it is used as an index to characterize the microstructure damage of the asphalt mixture. The results show that the variation of air-void distribution, air-void shape characteristics, and air-void fractal dimension with the loading process can well characterize the permanent deformation law of the rutting slab. The fractal dimension of the air void increases with the increase in load. It is a dynamic process in which the air-void content changes with crack initiation and propagation. After rutting deformation, the total air-void area and average air-void size of the sample increase, and the total air-void number decreases. Because microcracks are formed in the specimen after rutting damage, the aspect ratio of the air void increases, and the roundness value decreases.

show abstract

Section: Methodsmentioning

confidence: 99%

Characterization of Rutting Damage by the Change of Air-Void Characteristics in the Asphalt Mixture Based on Two-Dimensional Image Analysis

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Considering that NMPS of the asphalt mixtures used in this study is 13.2 mm, the BSS selected was 2.36 mm. Moreover, if the aggregate particles greater than or equal to 2.36 mm are considered the skeleton of coarse aggregates, AC can also be designed as a skeleton-dense gradation [ 24 ].…”

Section: Family Of Gradation Curves and Gradation Rangementioning

confidence: 99%

Experimental Research on Gradation Range and Performance of SMAC13

Zhen,

Cao,

Dong

et al. 2024

Materials

Self Cite

View full text Add to dashboard Cite

Stone matrix asphalt and asphalt concrete mixture with 13.2 mm nominal maximum aggregate size (named SMA13 and AC13, respectively) are widely used in the surface course of asphalt pavement in China. Generally, the pavement performance of SMA13 is superior to that of AC13, while the cost of the former is significantly higher than that of the latter. The objective of this paper was to develop a new hot mix asphalt (named SMAC13) whose performance and cost are between SMA13 and AC13. A boundary sieve size (BSS) of 2.36 mm was selected between fine and coarse aggregates. Based on the union set of aggregate gradation ranges of SMA13 and AC13, the family of gradation curves in the forms of S shapes were designed in terms of the BSS passing rate. According to the evaluation of the skeleton interlock of coarse aggregate of the gradation curve family, the aggregate gradation range of SMAC13 was determined. Also, the performance of three kinds of asphalt mixtures were compared through laboratory tests. The results indicated that SMA13 shows the best rutting resistance, followed by SMAC13 then AC13, while in terms of low-temperature performance in resistance to cracking, the sequence is SMAC13, AC13, and SMA13. The sequence of water stability is AC13, SMAC13, and SMA13. Furthermore, the cost of SMAC13 is 25% less than that of SMA13. Therefore, SMAC13 can be used as an alternative for the surface course of asphalt pavement in terms of performance and cost.

show abstract

“…Previous research indicated that an intrinsic relationship existed between VMA and VCA, the percentage passing of the boundary sieve, the bulk specific gravity of the mineral aggregate, etc. [17,18]. Therefore, studying the VCA of coarse aggregates is fundamental and necessary for the grading design of SMA and HMA.…”

Section: Introductionmentioning

confidence: 99%

Prediction Model of VCA Formed by the Packing of Hybrid Lithological Coarse Aggregates Used in SMA

Jiang¹,

Liu²,

Cao

et al. 2022

Materials

Self Cite

View full text Add to dashboard Cite

The voids in coarse aggregate (VCA) is an important volumetric index in the mineral aggregate gradation design of stone matrix asphalt (SMA) mixtures. To explore the law of variation for VCA formed by the packing of basalt and lime coarse aggregates, a uniform design method and vibrating compaction tests were used to establish the prediction model. Based on the test results and stepwise regression analysis, a reliable prediction model of VCA was obtained. There is a multiple nonlinear relationship between the VCA and the proportion of each coarse aggregate in the mixture. Regardless of the type of coarse aggregates used, the rule of VCA with different forms of aggregate gradation curves has universal significance. This conclusion can help to determine the aggregate gradation in the design of SMA mixtures.

show abstract

Impacts of Aggregate Gradation on the Volumetric Parameters and Rutting Performance of Asphalt Concrete Mixtures

Cited by 7 publications

References 14 publications

Characterization of Rutting Damage by the Change of Air-Void Characteristics in the Asphalt Mixture Based on Two-Dimensional Image Analysis

Characterization of Rutting Damage by the Change of Air-Void Characteristics in the Asphalt Mixture Based on Two-Dimensional Image Analysis

Experimental Research on Gradation Range and Performance of SMAC13

Prediction Model of VCA Formed by the Packing of Hybrid Lithological Coarse Aggregates Used in SMA

Contact Info

Product

Resources

About