Mechanism of Aggregate Gradation Affecting Interconnected Porosity of Semi Flexible Asphalt Pavement

DOI

10.2991/978-94-6463-728-1_41How to use a DOI?

Keywords

Semi flexible Pavement; Interconnected Porosity rate; Aggregate Gradation; Characteristic Value

Abstract

Semi-flexible pavement (SFP) can effectively refine rutting problem of asphalt pavements with the combining of rigidity and flexibility simultaneously. This study focuses on interconnected porosity rate (IPR), a key indicator to control engineering quality of semi-flexible pavement, and investigates mechanism of aggregates gradation (AG) affecting IPR. Based on the SFAC-20 AG range specified in Beijing local regulation DB11/T 1817, five different AG curves were selected. Among them, Gradation Curve I (GCI) locates at the median, Gradation Curve II (GCII) is close to the upper limit, Gradation Curve III (GCIII) is close to the lower limit, Gradation Curve IV (GCIV)has coarse materials near the upper limit and fine materials near the lower limit forming an inverted S-shape, and Gradation Curve V (GCV) has coarse materials near the lower limit and fine materials near the upper limit forming a regular S-shape. By the aid of the device independently developed for measuring IPR, aggregates characteristics value K_V and IPR of asphalt Marshall specimens of five different AG mixtures were compared. It was found that K_V of gradation aggregates directly affects IPR of asphalt mixture, and the two are linearly correlated. With the help of this research conclusion, it is possible to predict IPR of asphalt mixture for semi-flexible pavements, based solely on the K_V of gradation aggregates, without adding asphalt and forming asphalt Marshall specimens in advance.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Shuyun Wang
AU  - Peijun Su
AU  - Fan Wang
AU  - Chongtao Zhu
AU  - Jingjing Feng
PY  - 2025
DA  - 2025/05/19
TI  - Mechanism of Aggregate Gradation Affecting Interconnected Porosity of Semi Flexible Asphalt Pavement
BT  - Proceedings of the 3rd International Conference on Green Building, Civil Engineering and Smart City (GBCESC 2024)
PB  - Atlantis Press
SP  - 410
EP  - 419
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-728-1_41
DO  - 10.2991/978-94-6463-728-1_41
ID  - Wang2025
ER  -