Molecular Simulations of Anti-Aging Mechanisms on Nano-LDHs Modified Asphalt

Xin Xing Zhou; Guo Fei Zhang; Rong Mao Liu; Liang Zheng

doi:10.4028/www.scientific.net/KEM.599.198

Paper Titles

Influence of VOC Emission on Asphalt Components
p.178

Investigation of Rheological Characteristics of Carbon Fiber Modified Asphalt Binder
p.182

Investigation of Anti-UV Aging of Bitumen Modified with Layered Double Hydroxides
p.187

Microwave Heating of Steel Slag Asphalt Mixture
p.193

Molecular Simulations of Anti-Aging Mechanisms on Nano-LDHs Modified Asphalt
p.198

Performance Evaluation of SBS Modified Bituminous Roofing Membrane Containing Layered Double Hydroxides
p.203

Prediction of Fatigue Life of Steel-Slag Asphalt Concrete Based on Four Point Bending Test
p.208

Properties and Mechanism Analyse of High-Elasticity Modified Asphalt
p.212

Research of Road Application Performances of Asphalt Mixtures with Active Mineral Powder
p.218

HomeKey Engineering MaterialsKey Engineering Materials Vol. 599Molecular Simulations of Anti-Aging Mechanisms on...

Molecular Simulations of Anti-Aging Mechanisms on Nano-LDHs Modified Asphalt

Abstract:

Abstract. Aging of asphalt is a serious problem of asphalt damage and occurs throughout its service life. In general, a common method is to use different additives or modifiers for anti-aging. The objective of this study was to investigate the effects of layered double hydroxides(LDHs) additives on anti-aging mechanism using molecular simulations. Molecular dynamic simulations were used to simulate the changes of physical properties and structure before and after aging. Results showed that the degradation of asphalt was dominant reaction and modified asphalts had a high-temperature stability at thermal aging without oxygen. Owing to the difference of polarity between LDHs and asphalt components, phase separation phenomenon would occur at thermal oxidative aging. LDHs also increased the orderliness of asphalt binder.

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Periodical:

Key Engineering Materials (Volume 599)

Pages:

198-202

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.599.198

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Online since:

February 2014

Authors:

Xin Xing Zhou*, Guo Fei Zhang, Rong Mao Liu, Liang Zheng

Keywords:

Anti-Aging Mechanisms, Modified Asphalt, Molecular Simulations, Nano-LDHs

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* - Corresponding Author

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