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Journal ArticleDOI

Field measurement of strain response for typical asphalt pavement

TL;DR: In this article, three typical asphalt pavement structures with flexible base, combined base and semi-rigid base were selected to perform field strain tests under static and dynamic load using the fiber Bragg grating optical sensing technology.
Abstract: In order to reveal the changing law of the mechanical response of asphalt pavements under the action of vehicle load and provide references for the design of durable pavements, three typical asphalt pavement structures with flexible base (S1), combined base (S2), and semi-rigid base (S3) were selected to perform field strain tests under static and dynamic load using the fiber Bragg grating optical sensing technology. The changing characteristics of the strain field along the horizontal and depth directions of pavements were analyzed. The results indicate that the most unfavorable asphalt pavement layers were the upper-middle surface layer and the lower base layer. In addition, the most unfavorable loading positions on the surface layer and the base layer were the center of wheel load and the gap center between two wheels, respectively. The most unfavorable layer of the surface layers gradually moved from the lower layer to the upper layer with the increase of base layer modulus. The power function relationships between structural layer strain and vehicle speed were revealed. The semi-rigid base asphalt pavement was the most durable pavement type, since its strain value was lower compared to those of the other structures.
Citations
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Journal ArticleDOI
TL;DR: In this paper, the authors evaluated the field mechanical response and the calculations mechanical response of finite element method (FEM) with different moduli input were evaluated in this research, and they indicated that a specific modulus should be selected to ensure the calculated value effectively reflect the measured mechanical response.

4 citations

Journal ArticleDOI
TL;DR: In this article, the authors reveal the dynamic strain response characteristics and variation law of asphalt pavement structure with different base types under traffic load, and provide reliable measured data for the development of a pavement structure design method combined with China's national conditions and highway construction characteristics.

3 citations

Journal ArticleDOI
TL;DR: In this paper , the influence of frozen soil change features on pavement materials in cold places is utilized to research the fluctuation law of subgrade temperature field under cement concrete and asphalt pavements because subgrade and pavement illnesses frequently occur in permafrost locations.
Abstract: The challenge of constructing roads on frozen ground in cold climes has long been acknowledged on a global scale. As a result, particular requirements for pavement materials and structures have been developed to address the special construction and usage conditions for highway pavement. The influence of frozen soil change features on pavement materials in cold places is utilized to research the fluctuation law of subgrade temperature field under cement concrete and asphalt pavements because subgrade and pavement illnesses frequently occur in permafrost locations. The residual tensile strength of regular emulsified asphalt dropped to 50% after 7 days of continuous immersion, while that of high-performance modified emulsified asphalt only reached 75%. However, the residual tensile strength of water-borne epoxy resin emulsified asphalt remained over 90%. Regardless of how smooth or uneven the contact surface is, the results show that water-borne epoxy resin emulsified asphalt has good adhesive qualities. However, the water-borne epoxy resin emulsified asphalt still retained over 90% of its original tensile strength. Regardless of how smooth or uneven the contact surface is, the results show that water-borne epoxy resin emulsified asphalt has good adhesive qualities.
Journal ArticleDOI
TL;DR: In this paper , a semi-rigid base asphalt pavement (SRBAP) construction is designed with the classical theory of linear elastic mechanics and a significant discrepancy between the calculation results of the pavement structure load response and the measured results, which leads to inaccurate structural resistance and load response calculations.
References
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Journal ArticleDOI
TL;DR: In this article, the performance of different nanostructures of copper oxide (CuO) by in-situ growth on carbon clothes (CC) is investigated for detecting glucose using cyclic voltammetry (CV) and chronoamperometry.
Abstract: Different nanostructures of copper oxide (CuO) by in-situ growth on carbon clothes (CC) are prepared to develop ultrasensitive non-enzymatic glucose sensors. The electrochemical performance of the CuO-based electrodes for detecting glucose has been investigated by cyclic voltammetry (CV) and chronoamperometry. The CuO nanosheets (CuO NSs)/CC electrode demonstrates a high sensitivity of 4902 μA mM−1 cm−2 at an applied potential of 0.55 V (vs. Ag/AgCl/3 M KCl) in alkaline solution, and it shows 2973 μA mM−1 cm−2 and 1246 μA mM−1 cm−2 for the CuO nanowires (CuO NWs)/CC and CuO nanoparticles (CuO NPs)/CC, respectively. Ascribing to high conductivity of CC, high specific surface-area from CuO nanostructures, and facilitated charge transfer through in-situ grown structure, the electrodes demonstrate ultrasensitive, selective, stable and fast amperometric sensing (<3 s) of glucose, which presents a new strategy to develop non-enzymatic glucose sensors.

86 citations

Journal ArticleDOI
TL;DR: In this article, the effects of RAP, loading frequency and strain level on the fatigue lives of asphalt mixtures and binders are examined. And the relationship between the fatigue life of asphalt mixture and binder is determined.

84 citations

Journal ArticleDOI
TL;DR: In this paper, a brief historical overview of pavement design methods is presented, highlighting early limitations of old empirical methods, and the main challenges for the development of a European pavement design method are presented as well as the recent research developments that can be used for that method.
Abstract: Pavement and mix design represent one of the key components within the life cycle of a road infrastructure, with links to political, economic, technical, societal and environmental issues. Recent researches related to the characteristics of materials and associated behavior models both for materials and pavement, made it appropriate to consider updating current pavement design methods, and especially in the USA this has already been in process while in Europe uses of the methods developed in the early 1970s. Thus, this paper firstly presents a brief historical overview of pavement design methods, highlighting early limitations of old empirical methods. Afterwards, French, UK and Shell methods currently in use in Europe will be presented, underlining their main components in terms of methodology, traffic, climatic conditions and subgrade. The asphalt mix design and modeling in Europe are presented with their inclusion in the pavement design methods. Finally, the main challenges for the development of a European pavement design method are presented as well as the recent research developments that can be used for that method.

82 citations

Journal ArticleDOI
TL;DR: Based on the principle of fibre Bragg grating (FBG) sensing technology and hypothesis of relationship between material stable performance and deformation property, a framework for asphalt pavement compaction using FBG sensing technology was provided.

51 citations

Journal ArticleDOI
TL;DR: Improved design proposals on the construction scheme of asphalt pavement are addressed to control the strain of the established asphalt concrete course in relatively low level and validate the feasibility and reliability for the long-term monitoring.
Abstract: The durability, robustness, and long-term stability of optical-fiber-based sensors applied to practical engineering have always been challenging problems. Refer to the sensors embedded in asphalt pavements, the situation becomes serious and feasible sensors with enhanced function are in high demand. Therefore, an improved design to configure the quasi-distributed and distributed optical fiber sensors and FBG-based point sensors for monitoring the three-dimensional information of multilayered asphalt pavements is needed. The in-field data declare that the transversal, longitudinal, and vertical deformations of the tested urban asphalt pavement are mainly affected by temperature. The M-shape strain profile induced by heavy vehicles can decrease to the regular state in approximately 30 min after unloading. The tested asphalt pavement presents good structural performance to bear the tensile strain and permanent deformation. The high survival ratio and the good robustness of the proposed sensors against the harsh construction and operation environment validate the feasibility and reliability for the long-term monitoring. Improved design proposals on the construction scheme of asphalt pavement are also addressed to control the strain of the established asphalt concrete course in relatively low level.

47 citations