Aggregate Geometrical Features and Their Influence on the Surface Properties of Asphalt Pavement
Abstract
:1. Introduction
2. Experimental Study
2.1. Raw Materials and Mixture Design
2.1.1. Raw Materials
2.1.2. Mixture Design
2.2. Aggregate Geometrical Features Analysis Method
2.2.1. Image Processing
2.2.2. Aggregate Geometric Features Analysis
2.3. Pavement Surface Property Analysis Method
3. Aggregate Geometrical Features Test Results
3.1. Analysis of Aggregate Form
3.2. Analysis of Aggregate Angularity
3.3. Analysis of Aggregate Surface Texture
3.4. Experimental Verification
3.4.1. Selection of Aggregate Form Characteristic Index
3.4.2. Verification of Aggregate Angularity Characteristic Index
3.4.3. Verification of Aggregate Surface Texture Characteristic Index
4. Statistical Relationships between Pavement Skid Resistance and Aggregate Geometric Features
4.1. Results of Aggregate Geometrical Features in the Mixture
4.2. Statistical Correlations of MTD and MPD with Aggregate Geometrical Features
4.3. Statistical Correlations of WFC with Aggregate Geometric Features
5. Prediction Model of Pavement Surface Properties Based on Aggregate Geometrical Features
6. Conclusions
- (1)
- The Aggregate Geometric Characteristic Evaluation System (i.e., AGCES) developed based on 2-dimensional digital image processing techniques can characterize the form property, angularity characteristics, and surface texture of aggregate particles.
- (2)
- Aggregate with distinct edges and corners and deeper surface texture improves pavement surface roughness, which is manifested as the increase in MTD, MPD and WFC. The form property of aggregate has no significant effect on the surface texture of asphalt pavement.
- (3)
- The prediction models of pavement surface characteristics based on the angularity characteristics and surface texture of aggregate particles are developed according to the study on the influence of aggregate geometrical features on MTD, MPD and WFC. The coefficients of the mentioned models are calculated using Levenberg-Marquart and universal global optimization.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Number | Aggregate with Particle Size of 2.36 mm | Aggregate with Particle Size 2.36 mm | Aggregate Gradation | Asphalt Type |
---|---|---|---|---|
1 | Limestone | Limestone | AC-13 coarse, AC-13 target and AC-13 fine | SBS modified asphalt |
2 | Round limestone | |||
3 | Basalt | |||
4 | Diabase | |||
5 | Gneiss |
Gradation Type | 16 | 13.2 | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 |
---|---|---|---|---|---|---|---|---|---|---|
AC-13 coarse | 100 | 91 | 70 | 42 | 28 | 18 | 13 | 9 | 6 | 5 |
AC-13 target | 100 | 96 | 78 | 44 | 33 | 23 | 17 | 11 | 9 | 6 |
AC-13 fine | 100 | 99 | 83 | 64 | 46 | 35 | 25 | 18 | 14 | 7 |
Aggregate Type | F | F0.05 (2477) |
---|---|---|
Limestone | 921.496 | 3.015 |
Round limestone | 781.542 | |
Basalt | 804.315 | |
Diabase | 764.862 | |
Gneiss | 684.210 |
Aggregate Size (mm) | F | F0.05 (4795) |
---|---|---|
4.75 | 189.885 | 2.383 |
9.5 | 105.214 | |
13.2 | 129.643 |
Test Results | 4.75 mm | 9.5 mm | 13.2 mm | Σ |
---|---|---|---|---|
Proportion of aggregate of a certain particle size in the gradation (%) | 34 | 18 | 4 | 56 |
Proportion of aggregate of a certain particle size in coarse aggregate (%) | 60.71 | 32.14 | 7.14 | 100 |
SI of aggregate | 2.4312 | 2.224 | 2.0664 | — |
FF of aggregate | 0.7893 | 0.7913 | 0.7945 | — |
AI of aggregate | 1.0427 | 1.0340 | 1.0310 | — |
TF of aggregate | 1.4386 | 0.5428 | 0.4211 | — |
Average SI of aggregates in the mixture (i.e., SIa) | 2.338 | |||
Average FF of aggregates in the mixture (i.e., FFa) | 0.790 | |||
Average AI of aggregates in the mixture (i.e., AIa) | 1.039 | |||
Average TF of aggregates in the mixture (i.e., TFa) | 1.078 |
Aggregate Type | Gradation Type | SIa | FFa | AIa | TFa |
---|---|---|---|---|---|
Limestone | AC-13 coarse | 2.302 | 0.791 | 1.038 | 0.971 |
AC-13 target | 2.338 | 0.790 | 1.039 | 1.078 | |
AC-13 fine | 2.328 | 0.790 | 1.039 | 1.012 | |
Round limestone | AC-13 coarse | 2.221 | 0.808 | 1.017 | 0.849 |
AC-13 target | 2.246 | 0.808 | 1.016 | 0.938 | |
AC-13 fine | 2.243 | 0.808 | 1.017 | 0.883 | |
Basalt | AC-13 coarse | 2.160 | 0.805 | 1.111 | 1.199 |
AC-13 target | 2.203 | 0.803 | 1.116 | 1.324 | |
AC-13 fine | 2.184 | 0.803 | 1.116 | 1.244 | |
Diabase | AC-13 coarse | 2.252 | 0.797 | 1.080 | 0.934 |
AC-13 target | 2.290 | 0.796 | 1.082 | 1.033 | |
AC-13 fine | 2.281 | 0.796 | 1.082 | 0.975 | |
Gneiss | AC-13 coarse | 2.149 | 0.811 | 1.144 | 1.455 |
AC-13 target | 2.197 | 0.808 | 1.148 | 1.591 | |
AC-13 fine | 2.173 | 0.810 | 1.147 | 1.542 |
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Sun, P.; Zhang, K.; Han, S.; Xiao, Y. Aggregate Geometrical Features and Their Influence on the Surface Properties of Asphalt Pavement. Materials 2022, 15, 3222. https://doi.org/10.3390/ma15093222
Sun P, Zhang K, Han S, Xiao Y. Aggregate Geometrical Features and Their Influence on the Surface Properties of Asphalt Pavement. Materials. 2022; 15(9):3222. https://doi.org/10.3390/ma15093222
Chicago/Turabian StyleSun, Pei, Ke Zhang, Sen Han, and Yun Xiao. 2022. "Aggregate Geometrical Features and Their Influence on the Surface Properties of Asphalt Pavement" Materials 15, no. 9: 3222. https://doi.org/10.3390/ma15093222