Numerical evaluation of induction heating assisted compaction technology for low temperature asphalt pavement construction

Conference paper (2017)

Authors

C. Zhou Pavement Engineering - CEG
X. Liu Pavement Engineering - CEG
P. Apostolidis Pavement Engineering - CEG
Research Group
Pavement Engineering (CEG) (TU Delft)
Copyright: © 2017 C. Zhou, X. Liu, P. Apostolidis
Porous asphalt DEM Compaction Induction heating Low temperature asphalt FEM
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Published Date

2017

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Engineering Structures

Research Group

Pavement Engineering

Abstract

Low Temperature Asphalt (LTA) technologies are utilized in asphalt pavement industry to lower energy demands and greenhouse gas emission during mixing and construction processes. Although these technologies are currently available and hope to demonstrate similar performance with Hot Mix Asphalt (HMA) mixes, LTA shows more sensitive than HMA to temperature reduction during compaction and that will lead to inadequate compaction. Especially for Low Temperature Porous Asphalt (LTPA) mixes, the quick reduction of mix temperature is the main cause to poor pavements performance. The induction heating assisted compaction process appears to be an effective way to ameliorate compaction issues and to improve the compactability at lower temperatures. To design this process for LTA mixes, a numerical approach of combining the finite and the discrete element methods is presented in this paper. Porous asphalt concrete was the selected study material. The simulation process was divided into three steps: (i) temperature field prediction during induction heating, (ii) adjustment of asphalt mortar parameters and (iii) asphalt pavement compaction analysis. The effect of induction heating to asphalt compaction effectiveness, the tendency of mix density changing along with the increase of compactor passes and the influence of temperature on compaction at different locations in pavement were studied and discussed as well