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RAP pre-treatment for fast cold in-place recycling

Lin, P. (author), Liu, X. (author), Ren, S. (author), Li, Yi (author), Erkens, S. (author), Welvaarts, B. (author), Brouns, K. (author)

Developed by Delft University of Technology, the tri-component polyurethane modified cold binder (PMCB) displays impressive durability and strength in asphalt mixtures, showing promise as a reliable binder for cold in-place recycling. However, when applying PMCB for rapid, in-situ recycling, the presence of moisture in reclaimed asphalt...

conference paper 2024

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Unraveling the influence of fibers on aging susceptibility and performance of high content polymer modified asphalt mixtures

Lin, P. (author), Liu, X. (author), Ren, S. (author), Li, Yi (author), Xu, Jian (author), Li, Mingliang (author)

High-Content SBS Polymer Modified Asphalt Mixtures (HCPMA) combined with fibers have gained popularity in porous pavement construction due to their superior performance. Although the aging behavior of HCPMA has been extensively studied, the impact of fibers on performance and aging susceptibility remains unclear. This research investigates the...

journal article 2023

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Effects of Bitumen Thickness on the Aging Behavior of High-Content Polymer-Modified Asphalt Mixture

Lin, P. (author), Liu, X. (author), Ren, S. (author), Xu, Jian (author), Li, Yi (author), Li, Mingliang (author)

The film thickness of asphalt mixtures is critical for determining their performance and aging durability. However, understanding of the appropriate film thickness and its influence on performance and aging behavior for high-content polymer-modified asphalt (HCPMA) mixtures is still limited. This research aims to examine the relationship between...

journal article 2023

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Investigating the rheological properties and compatibility behaviours of RET/PE and WR/CR/ SBS compound-modified bitumen

Ren, S. (author), Liu, X. (author), Jing, R. (author), Gao, Y. (author), Lin, P. (author), Erkens, S. (author)

Two types of elastomer/plastic compound-modified bitumen were developed by means of incorporating the reactive elastomeric terpolymer (RET) into the plastic (high-density polyethylene HDPE or recycled polyethylene RPE) modified bitumen and adding the wax residue (WR) into the bitumen/elastomer (crumb rubber CR or styrene–butadiene–styrene SBS)...

journal article 2023

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Molecular dynamics simulation and experimental validation on the interfacial diffusion behaviors of rejuvenators in aged bitumen

Ren, S. (author), Liu, X. (author), Gao, Y. (author), Jing, R. (author), Lin, P. (author), Erkens, S. (author), Wang, H. (author)

This study aims to multiscale investigate the effects of rejuvenator type, temperature, and aging degree of bitumen on the diffusion behaviors of rejuvenators (bio-oil BO, engine-oil EO, naphthenic-oil NO, and aromatic-oil AO) in aged binders. The molecular dynamics (MD) simulation method is performed to detect the molecular-level diffusion...

journal article 2023

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Do different chemical and rheological properties act as effective and critical indicators for efficiency evaluation of rejuvenated bitumen?

Ren, S. (author), Liu, X. (author), van Aggelen, M. (author), Lin, P. (author), Erkens, S. (author)

This study investigates the impacts of rejuvenator type/dosage and the aging degree of bitumen on the chemical and rheological properties of rejuvenated bitumen, and propose critical chemo-rheological indicators for evaluating rejuvenation efficiency. Moreover, the potential connections between essential chemical and rheological indices of...

journal article 2023

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Molecular dynamics simulation on bulk bitumen systems and its potential connections to macroscale performance: Review and discussion

Ren, S. (author), Liu, X. (author), Lin, P. (author), Gao, Y. (author), Erkens, S. (author)

Molecular dynamics (MD) simulation plays an effective role in predicting the critical properties and explaining the macroscale phenomenon at the nanoscale. This review summarized the application cases of MD simulations in various bitumen systems, considering aging, modification, and rejuvenation factors. Meanwhile, the potential relationships...

review 2022

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Review on the diffusive and interfacial performance of bituminous materials: From a perspective of molecular dynamics simulation

Ren, S. (author), Liu, X. (author), Lin, P. (author), Gao, Y. (author), Erkens, S. (author)

The cohesive and adhesive performances of bituminous materials significantly affect the service life of asphalt pavement. The molecular dynamics (MD) simulation method has been proved as an effective tool to predict the thermodynamics parameters of different multisubstance and multi-phase bitumen models during different diffusion, self-healing,...

review 2022

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Effect of High Content of Waste Tire Rubber and Sulfur on the Aging Behavior of Bitumen

Wang, Sheng (author), Huang, Weidong (author), Liu, X. (author), Lin, P. (author), Ren, S. (author), Li, Yi (author)

High content rubber modified bitumen (HCRMB) prepared from the high content of waste tire rubber and bitumen has good performance while allowing greater use of the waste tires. However, HCRMB is subject to aging during use, which can affect its performance. The purpose of this paper was to investigate the effect of high content of waste tire...

journal article 2022

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A Comprehensive Study on the Rejuvenation Efficiency of Compound Rejuvenators for the Characterization of the Bituminous Binder, Mortar, and Mixture

Li, Mingliang (author), Ren, S. (author), Liu, X. (author), Wu, Zhe (author), Zhang, Haopeng (author), Fan, Weiyu (author), Lin, P. (author), Xu, Jian (author)

This study aims to comprehensively investigate the rejuvenation efficiency of various self-developed compound rejuvenators on the physical, mechanical, and aging properties of aged bitumen, asphalt mortar, and mixture. The results revealed that the restoration capacity of vacuum distilled-oil rejuvenators on high-and-low temperature performance...

journal article 2022

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Effect of Bio-oil on Rheology and Chemistry of Organosolv Lignin–Modified Bitumen

Zhang, Y. (author), Liu, X. (author), Ren, S. (author), Jing, R. (author), Lin, P. (author), Apostolidis, P. (author), Erkens, S. (author), Wang, Xuancang (author), Scarpas, Athanasios (author)

Lignin, one of the most abundant natural polymers, has been extensively studied as an additive in bituminous binders. Even though the lignin improves the overall resistance against oxidative aging of bitumen, it could lead to high thermal cracking sensitivity. In this study, a bio-oil (i.e., rapeseed oil) is implemented in lignin-modified...

journal article 2022

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Insight into the compatibility behaviors between various rejuvenators and aged bitumen: Molecular dynamics simulation and experimental validation

Ren, S. (author), Liu, X. (author), Lin, P. (author), Gao, Y. (author), Erkens, S. (author)

The compatibility potential of rejuvenators plays an important role in improving the blending degree of rejuvenated bitumen. This study aims at estimating the efficiency of molecular dynamics (MD) simulation in predicting the compatibility between rejuvenators and aged bitumen, and exploring the influence of rejuvenator type, aging degree of...

journal article 2022

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Influence of swelling-degradation degree on rheological properties, thermal pyrolysis kinetics, and emission components of waste crumb rubber modified bitumen

Ren, S. (author), Liu, X. (author), Lin, P. (author), Erkens, S. (author)

This study investigated the effects of swelling-degradation degree on the rheological properties and thermal pyrolysis behaviors of crumb rubber modified bitumen (CRMB). The equilibrium viscosity of CRMB in 160 ◦Cswelling process is 10.5 Pa·s at 8 h. During the 200℃-degradation procedure, the viscosity increased to a maximum value of 20.58 Pa·s...

journal article 2022

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Multi-component analysis, molecular model construction, and thermodynamics performance prediction on various rejuvenators of aged bitumen

Ren, S. (author), Liu, X. (author), Erkens, S. (author), Lin, P. (author), Gao, Y. (author)

The molecular dynamics (MD) simulation method is proved as an efficient tool to explore the intermolecular interaction between rejuvenators and aged bitumen, but the simple “singlemolecule” model of rejuvenator would bring the inaccuracy to simulation outputs due to a huge difference with its realistic multi-component chrematistic. This study...

journal article 2022

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Toward the long-term aging influence and novel reaction kinetics models of bitumen

Ren, S. (author), Liu, X. (author), Lin, P. (author), Jing, R. (author), Erkens, S. (author)

This study aimed to explore the long-term aging influence on chemo rheological properties and develop novel consecutive models for the long-term aging reaction kinetics of bitumen. The results revealed that the aging index was significantly dependent on the types of selected parameters. The Zero-order model was suitable to describe the long-term...

journal article 2022

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Chemical characterizations and molecular dynamics simulations on different rejuvenators for aged bitumen recycling

Ren, S. (author), Liu, X. (author), Lin, P. (author), Erkens, S. (author), Gao, Y. (author)

Molecular dynamics (MD) simulation is an advanced tool to explore the interaction mechanism between aged bitumen and rejuvenators at the nanoscale. However, the general MD molecular structures of rejuvenators led to the lower quantify and inaccuracy of the simulation outputs. This study aims at developing more realistic molecular models to...

journal article 2022

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Chemo-physical characterization and molecular dynamics simulation of long-term aging behaviors of bitumen

Ren, S. (author), Liu, X. (author), Lin, P. (author), Erkens, S. (author), Xiao, Yue (author)

To further explore the long-term aging behaviors of bitumen from the multiscale perspectives, the experimental characterization and molecular dynamics (MD) simulation methods were performed. Series of chemical properties for the virgin and various aged bitumen were evaluated using the TCL-FID, ATR-FTIR, Elemental analysis and GPC tests. The...

journal article 2021

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The continuous swelling-degradation behaviors and chemo-rheological properties of waste crumb rubber modified bitumen considering the effect of rubber size

Ren, S. (author), Liu, X. (author), Lin, P. (author), Wang, H. (author), Fan, W. (author), Erkens, S. (author)

The chemo-rheological properties of crumb rubber modified bitumen are always unstable due to the mutable and uncontrollable swelling-degradation degree of crumb rubber in bitumen matrix. The study aimed at exploring the continuous swelling and degradation behaviors of crumb rubber modified bitumen (CRMB) considering the influence of rubber size...

journal article 2021

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Investigating the role of swelling-degradation degree of crumb rubber on CR/SBS modified porous asphalt binder and mixture

Ren, S. (author), Liu, X. (author), Xu, Jian (author), Lin, P. (author)

Porous asphalt pavement is widely used due to its adequate water permeability, noise reduction and skid resistance. The study aims at exploring the potential of using the crumb rubber/styrene–butadienestyrene (CR/SBS) modified bitumen as high-viscosity binder for porous asphalt mixture, and investigating the effect of swelling and degradation...

journal article 2021

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Use of waste oil/styrene-butadiene-rubber blends as rejuvenators for aged bitumen

Ren, S. (author), Liu, X. (author), Lin, P. (author), Erkens, S. (author)

This study elaborates the influence of blends formulated by waste oil (WO) and styrene-butadiene rubber (SBR) on thermo-mechanical and chemical compositional characteristics of rejuvenated bitumen. The results show that both WEO (waste engine oil) and WCO (waste cooking oil) can compensate viscous component for reclaimed bitumen, and the effect...

conference paper 2021