A5091482585- Asphalt Pavement Performance Evaluation
- Infrastructure Maintenance and Monitoring
- Geotechnical Engineering and Underground Structures
- Innovative concrete reinforcement materials
- Polymer composites and self-healing
- Grouting, Rheology, and Soil Mechanics
- Metal Alloys Wear and Properties
- Epoxy Resin Curing Processes
- Mechanical Failure Analysis and Simulation
- Concrete and Cement Materials Research
- Drilling and Well Engineering
- Mechanical Engineering and Vibrations Research
- Numerical methods in engineering
- Metallurgy and Material Forming
- Urban Stormwater Management Solutions
- BIM and Construction Integration
- Laser and Thermal Forming Techniques
- Millimeter-Wave Propagation and Modeling
- Microbial Applications in Construction Materials
- Granular flow and fluidized beds
- Petroleum Processing and Analysis
- Aluminum Alloy Microstructure Properties
- Microstructure and Mechanical Properties of Steels
- Epigenetics and DNA Methylation
- Aluminum Alloys Composites Properties
Nanjing Institute of Technology
2023-2025
Beijing Institute of Technology
2024
Southeast University
2019-2022
ShanghaiTech University
2021
Changsha University of Science and Technology
2019
Shougang Institute of Technology
2015-2018
Green Technology
2017-2018
Beijing Shijingshan Hospital
2017-2018
The objective of this study is to design an innovative mesoscopic test for characterizing the damage evolutions and fracture performances asphalt mortar. Based on SEM-Servopulser devices improved specimens, pure mode I cracking tests were conducted successfully under scanning electron microscope (SEM). It can have a real-time online observations records surface micro-crack behaviors different loads. And it first time in road engineering capture dynamic micro-behavior micro-structure...
The hot-mix epoxy resin commonly used in the market has insufficient toughness, resulting cracking of steel bridge deck pavement. To obtain excellent toughness hot mix resin, collaborative toughen is put forward to overcome shortcoming. In order character resins and asphalts affected by toughening agent, standard test method tensile properties for plastics used. synergistic mechanism lyotropy 1# rubber additive 2# are approved analyzing scanning electron microscope. Synchronous thermal...
Hot-mix epoxy asphalt (HEA), a polymer material for steel bridge deck pavements, has garnered attention due to its superior performance. The optimal content of different hot-mix resins varies their distinct compositions. This study investigated the viscosity-temperature characteristics, microscopic topography, mechanical properties, and mixture performances binders mixtures with varying self-prepared resin contents. Techniques such as laser scanning confocal microscopy (LSCM), tensile tests,...
An innovative procedure was proposed to simulate the viscoelastic mechanical behavior of asphalt mixture. The existing fractional models were quantitatively analyzed, and Zener model adopted. parameters obtained by fitting storage modulus loss simultaneously. relaxation in time domain deduced using Mittag-Leffler function. numerical algorithm implemented into finite-element (FE) software ABAQUS version 6.9. Simulations test conducted verify effectiveness FE implementation. Then dynamic tests...
Neural network-based models have been implemented to predict various health indicators of asphalt pavement using historical detection data. Unfortunately, their accuracy and reliability are not acceptable owing shallow architecture. To solve the issue, this study proposed an improved Transformer network health, called with forward reversed time series (Transformer FRTS). In terms input data, FRTS uses a new data form, so-called random difference series, reduce dependency prediction....
Due to the large void ratio of porous asphalt pavement, rainwater is more likely infiltrate through surface voids and affect internal structure, leading pavement damage. The objective this study was investigate variation mixture damage under different load levels dynamic water pore pressure levels. Based on a microscopic finite-element model for concretes, effects repeated loadings were introduced. Finite-element simulation models established analyze coupled effect pressure. examined...
The main objective of this paper was to develop a mesostructure-based finite element model rubber modified asphalt mixture predict both the dynamic modulus master curve and phase angle under large frequency range. is considered as three-phase material consisting aggregate, mortar, air void. mesostructure digitized by computed tomography (CT) scan implemented into software. 2S2P1D used obtain viscoelastic information an mortar range frequencies temperatures. continuous spectrum converted...
Significance This study provides further proof for ZFP57 as a master regulator of genomic imprinting since it maintains DNA methylation at most known imprinted regions and regulates allelic expression the corresponding genes. We propose two alternate switch models ZFP57-dependent regulation parent-of-origin–dependent genes based on quantitative analyses Our results also shed light mechanistic link between imprint monoallelic The indicate that clustered through maintenance control regions.
To explore the effect of different emulsifier contents on stability performance biomass-emulsified asphalt, three types emulsified asphalt with 1%, 3%, and 5% anionic emulsifiers were prepared analyzed by molecular dynamics simulation macroscopic experiments. Firstly, we used software (Material Studio, MS) to construct a model microscopic mechanism improve radial distribution function, interaction energy, interfacial layer thickness, solubility parameters system contents. The results...
Porous asphalt concrete (PAC) has the benefits of good drainage performance and excellent skid resistance. In double-layer porous pavement, top layer ensures pavement performance, bottom maintain lateral capacity with air voids content. However, there is no uniform thickness design for pavement. This study determined optimum binder contents PAC-13 mixtures, investigated influence high-viscosity modifier on mixture. The laboratory properties related to filed were obtained, including...
High-altitude platforms (HAPs) are considered to be the most important equipment for next-generation wireless communication technologies. In this paper, we investigate channel characteristics under configurations of massive multiple-input multiple-output (MIMO) space and large bandwidth at millimeter-wave (mmWave) bands, along with moving essence HAP ground terminals. A non-stationary three-dimensional (3D) geometry-based stochastic model (GBSM) is proposed a system. We use cylinder-based...
This paper investigated the effects of aggregate mesostructures on permanent deformation behavior an asphalt mixture using three-dimensional (3D) discrete element method (DEM). A 3D (DE) model composed coarse aggregates, mastic, and air voids was developed. Mesomechanical models representing interactions among components were assigned. Based mesomechanical modeling, uniaxial static load creep tests simulated prepared models, angularity, orientation, surface texture, distribution mixtures...
As a prime coat material, emulsified asphalt has an effective consolidation effect on the semi-rigid base layer, biomass oil can effectively increase penetration depth, but its content will also lead to loss of bonding when it is too large, so optimal needs be further determined. In this paper, based theory drying film formation asphalt, molecular dynamics simulation and experimental methods such as viscosity test, contact angle test maximum particle accumulation rate were used investigate...
Uneven support as result of voids beneath concrete slabs can lead to high tensile stresses at the corner slab and eventually cause many forms damage, such cracking or faulting. Three-dimensional (3D) finite element models pavement with void are presented. Mesh convergence analysis was used determine type mesh size in model. The accuracy model is verified by comparing calculation results code design standards China. reliability field measurement. shows that more affected than edge. Impact...
A new kind of modified emulsified bitumen used to plug a microcrack was studied. The sizes high-temperature were fit for the microcrack, which approved by scanning electron microscope and laser particle size analyzer. Some tests have been designed demonstrate that polymer could be promote softening point asphalt, has also shown an excellent performance in terms static filtration, viscous coefficient, extreme pressure lubrication, as well inhibit ting shale expansion. permeability recovery...
Abstract Focusing on characterizing the elastic behavior of granular particles based discrete element method (DEM), this study utilized Mustoe and Griffiths’ equations a homogenization to predict performance continuous medium precisely, including modulus, Poisson’s ratio, brittle fracture criterion. A commercial DEM software named Particle Flow Code in Two Dimensions (PFC2D) was used conduct numerical simulations because macrobehavior predicted by PFC2D highly depends sphere size...
Expansion joint failure is one of the main causes that lead to damages concrete pavement. The silicon dioxide/shape memory polyurethane (SiO2/SMPU) a new kind sealant which can use its shape performance adapt width expansion with change pavement temperature, and it effectively prolong service life reduce maintenance costs. In this study, effects programming addition SiO2 particles thermodynamic properties specimens were detected using differential scanning calorimetry (DSC), optimal...
Focused on the fatigue performance of asphalt mortar, this study proposed an assessment model for damage evolution based continuum mechanics. From perspective material scale rather than macrostructure, was set by concentrating stress‐strain state a tiny point which could characterize accurately. By mechanical formula derivation and four‐point bending tests, law determined then verified. Based finite element method (FEM), commercial software named ABAQUS utilized to develop random mixtures...
The mechanical properties of the subgrade have a significant impact on service life and pavement performance superstructure pavement. By adding admixtures via other means to strengthen adhesion between soil particles, strength stiffness can be improved ensure long-term stability structures. In this study, mixture polymer particles nanomaterials was used as curing agent examine mechanism soil. Using microscopic experiments, strengthening solidified analyzed with scanning electron microscopy...