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Optimization of polyurethane-bonded thin overlay mixture designation for airport pavement

Frontiers of Structural and Civil Engineering 2022年第8期16卷 947-961页

作者： Xianrui LI Ling XU Qidi ZONG Fu JIANG Xinyao YU Jun WANG Feipeng XIAO Key Laboratory of Road and Traffic Engineering of Ministry of Education Tongji UniversityShanghai 201804China CAAC East China Regional Administration Shanghai 200335China Ningbo airport Group Co. Ltd.Ningbo 315154China

This research explored the application potential of PUM thin-overlay technology on airport rapid *** rapid curing process of polyurethane binder determines the limited time window for mixing and construction of polyurethane-bonded mixture(PUM),which presents significant difference with hot-mix asphalt(HMA)***,this research investigated and optimized the mix design of PUM for airport thin-overlay technology based on its thermosetting ***,limestone and basalt were comprehensively compared as an aggregate for ***,the effects of molding and curing conditions were studied in terms of mixing time,molding method,molding parameters and curing *** analysis was also conducted to evaluate the effects of gradation and particle size on PUM performances based on gray relational analysis(GRA),thus determining the key particle size to control PUM ***,the internal structural details of PUM were captured by X-ray CT scan *** results demonstrated that it only took 12 hours to reach 75%of maximum strength at a curing temperature of 50°C,indicating an efficient curing process and in turn allowing short traffic *** internal structural details of PUM presented distribution of tiny pores with few connective voids,guaranteeing waterproof property and high strength.

关键词： polyurethane-bonded mixture mix design optimization airport pavement thin overlay gray relational analysis

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Structural Evaluation for Maputo airport pavement

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Journal of Southwest Jiaotong University(English Edition) 2007年第2期15卷 126-131页

作者： Jose F. R. Diogo 卢阳张华 School of Civil Engineering Southwest Jiaotong University

Maputo airport was initially constructed to serve mixed traffic of light and medium aircrafts. With its opening to heavier aircrafts such as B727, DC10, Airbus 340, etc. , structural improvements have become necessary. For this purpose, structural evaluation were described and performed using falling weight deflectometer. Results show that while subgrade response to loads appears more consistent with depth, surface layer of the pavement is significantly influenced by the layer thickness as well as mechanical properties of pavement materials. Load magnitude also affects pavement performance. But loading conditions show an equivalent or even greater influence on pavement performance.

关键词： airport pavement Structural evaluation Falling weight deflectometer Non-destructive test

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Application of Modified Asphalt in airport pavement Works

Application of Modified Asphalt in Airport Pavement Works

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4～(th) International Conference on Road & Airfield pavement Technology

作者： Liang Qingyuan and Xu Yongming

＜正＞ This paper introduces application of airport asphalt pavement abroad and its application and development in China. Detailed analysis and assessment on work properties of airport asphalt pavement demonstrate a higher demand of technical quality standard. In line with discussion of mechanism of polymer modified asphalt, this paper introduces production techniques of pre-mixed polymer modified asphalt, technical specifications of SBS pre-mixed modified asphalt and their application in China. Application of pre-mixed polymer modified asphalt, should be the orientation of development of airport asphalt pavement in the future.

关键词： airport pavement polymer solubilizer stabilizer pre-mixed modified asphalt

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Dynamic response analysis of airport pavements during aircraft taxiing for evaluating pavement bearing capacity

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2021年第9期22卷 736-750页

作者： Qian DONG Jian-hua WANG Xian-min ZHANG Hao WANG Jing-nan ZHAO School of Civil Engineering Tianjin UniversityTianjin 300072China College of Transportation Science and Engineering Civil Aviation University of ChinaTianjin 300300China Department of Civil and Environmental Engineering Rutgers UniversityPiscataway NJ 08854USA

In this paper,we propose a new method to analyze airport pavement bearing capacity using vibration in runways during aircraft *** new method overcomes shortcomings of existing tests,such as flight suspension and simulated *** aircraft take-off and landing,acceleration sensors are arranged on the surface of the pavement far from the centerline,and the in-situ responses of the pavement under aircraft loads are collected during aircraft *** fundamental frequencies of the pavement are obtained by fast Fourier transformation of the measured accelerations,and are used to modify the parameters of a pavement finite element model built according to a design *** comparing the fundamental frequencies of the measured and calculated signals,the soil modulus is *** implement this test method and ensure the accuracy of bearing capacity evaluation,aircraft dynamic loads are obtained by solving dynamic balance equations of the aircraft-pavement coupled system,and the vibration response of the pavement and sensitivity analysis of the fundamental frequencies are *** results show that the fundamental frequencies at the center of the pavement are basically the same as those at the far side on the cross section;the fundamental frequencies in the depth direction remain constant,but the amplitude of the frequency spectrum *** effect of the soil resilient modulus on the vibration frequency is most *** fundamental frequency increases from 6.02 to 10.55 Hz when the soil dynamic resilient modulus changes from 91 to 303 *** effects of surface thickness and base thickness on the vibration frequency are less significant,and there is minimal influence when changing the dynamic elastic moduli of the surface layer or base *** test results indicate the efficacy of the method of vibration measurement at the pavement surface to estimate the layer modulus of airport pavement.

关键词： airport pavement Non-destructive test Aircraft-pavement coupling Fundamental frequency Acceleration Finite element model

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Impact Dynamics on Granular Plate

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Journal of Mechanics Engineering and Automation 2014年第9期4卷 738-746页

作者： Michele Buonsanti Giovanni Leonardi Francesco Scopelliti Francis Cirianni Department of Civil Energy Environmental and Material Engineering University of Reggio Calabria Reggio Calabria 89060 Italy

In this paper, a theoretical and numerical study on the impact of a rubber solid on the free surface of a granular plate is presented, showing a simulation of an aircraft wheel on impact with a flexible landing surface. This physical action, when we use a theological approach, becomes a fundamental parameter to investigate wear and tear, and consequently strength to micro and macro pavements failure. The study has developed initially from a microscopic point of view and subsequently on macroscale. The effects are strictly linked with material degradation associated with damage evolution. The problem is developed by energetic approach on an elastic-plastic element using the functional energy containing two contributions, bulk and surface. The model simulates the behaviour of flexible runway pavements during the landing phase.

关键词： Impact FEM (finite element model) airport pavement aircraft landing.

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