Development and Characterization of a Luminescent Coating for Asphalt Pavements

2020 ◽  
pp. 511-519 ◽  
Author(s):  
Elkin I. Gutiérrez ◽  
Henry A. Colorado
Keyword(s):  
Asphalt Pavements ◽  
Luminescent Coating

Characterization of polymer capsules used for self-healing asphalt pavements

2016 ◽  
pp. 1167-1174 ◽  
Author(s):  
T. Al-Mansoori ◽  
R. Micaelo ◽  
A. Garcia
Keyword(s):  
Asphalt Pavements ◽  
Self Healing

Application of nanotechnology in pavement engineering: a review

2020 ◽  
Vol 47 (9) ◽  
pp. 1037-1045
Author(s):  
Peerzada Mosir Shah ◽  
Mohammad Shafi Mir
Keyword(s):  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Road Construction ◽  
Asphalt Pavements ◽  
Modified Asphalt Binder ◽  
Pavement Engineering ◽  
Scientists And Engineers ◽  
Primary Focus ◽  
Preparation Techniques

Nanotechnology utilizes the research and technology established at the nuclear and molecular or macromolecular levels to comprehend the nanoscale phenomena. In road construction, the bituminous materials are used in enormous amounts. The macroscopic mechanical conduct of these materials still largely relies on microstructure and physical characteristics at a micro and nano scale level. For many years, scientists and engineers have been exploring nanotechnology in civil engineering, but nanotechnology use in this sector has been limited. Nanotechnology has caught the interest of experts and has progressively penetrated into the field of pavement engineering. The article reviews the published works carried out to study the use of nanomaterials in asphalt pavements and illustrates the technique used to enhance asphalt features by the use of these nanomaterials. In this review, multiple nanomaterials are discussed followed by characterization of these nanomaterials, preparation techniques of modified asphalt binder, and finally the effect of nanomaterials on the efficiency of base asphalt binder as well as the asphalt mixture. The primary focus continues on the use of nanotechnology in pavement engineering to achieve a better atmosphere for society based on recognized pavement engineering requirements and difficulties.

Characterization of non-uniform field aging in asphalt pavements

2017 ◽  
Vol 153 ◽  
pp. 607-615 ◽  
Author(s):  
Fan Yin ◽  
Amy Epps Martin ◽  
Edith Arámbula-Mercado ◽  
David Newcomb
Keyword(s):  
Asphalt Pavements ◽  
Uniform Field

Incorporation of GPR data into characterization of the bitumen filled cracks in pavements: Lab and numerical study

2020 ◽  
Author(s):  
Mezgeen Rasol ◽  
Vega Pérez Gracia ◽  
Mercedes Solla ◽  
Jorge C. Pais ◽  
Francisco M. Fernandes ◽  
...  
Keyword(s):  
Computational Models ◽  
Numerical Study ◽  
Fdtd Method ◽  
Asphalt Pavements ◽  
The Road ◽  
Rigid Pavements ◽  
Temporary Solution ◽  
Ground Penetrating ◽  
Difference Time

<p>Road pavements are subject to a range of problems due to traffic and temperature variations </p><p>producing cracks that propagate to the pavement surface. Cracks need to be assessed to avoid </p><p>deterioration and provide confidence in the functioning of the road system. Cracks are usually </p><p>maintained after visual inspection by filling with bitumen as a first rehabilitation technique to </p><p>avoid further deterioration and absorbing water leakages. Although this temporary solution does </p><p>not extend the pavement life cycle it can help to avoid additional problems occurring within the</p><p>pavement. This work is proposed to aid the development of understanding and characterization</p><p>of cracks filled with bitumen in both rigid and asphalt pavements.</p><p>This study reports on the results of several laboratory experiments that were performed to </p><p>explore the capability of Ground Penetrating Radar (GPR) in the assesment of bitumen-filled </p><p>cracks in both rigid and asphalt pavements, respectively. These tests were focused on the </p><p>analysis of cracking filled with bitumen using a GPR system equipped with a ground-coupled </p><p>antenna with a 2.3 GHz central frequency, and varying the antenna orientation with respect to the </p><p>crack axis.</p><p>Results showed the variation in characterization and changes in amplitude that could be expected </p><p>when analysing bitumen-filled cracks in concrete and asphalt specimens, dependent upon the </p><p>antenna orientation being used; GPR B-scans were compared to images from computational </p><p>models using a Finite-Difference Time-Domain (FDTD) method-based software package </p><p>(gprMax2D). Additionally, a field survey carried out provided images consistent with the</p><p>comparable conditions of the lab tests. The results of this work proved the capability of the GPR</p><p>method to detect and characterize cracks filled with bitumen in pavements across a range of </p><p>crack dimensions and pavement types.</p><p> </p><p>Keywords</p><p>GPR, NDT, Rigid pavements, Asphalt Pavements, Cracks, Computational models, Target orientation,</p><p>Pavement assessmen</p>

Improving Durability of Asphalt Pavements in Louisiana through Increased In-Place Field Density

2020 ◽  
Vol 2674 (10) ◽  
pp. 806-816
Author(s):  
Moses Akentuna ◽  
Louay N. Mohammad ◽  
Minkyum Kim ◽  
Samuel B. Cooper ◽  
Samuel B. Cooper
Keyword(s):  
Test Section ◽  
Asphalt Binder ◽  
Field Performance ◽  
Asphalt Pavements ◽  
Bending Tests ◽  
Field Density ◽  
Indirect Tensile ◽  
Design Optimum ◽  
Wheel Tracking

The objective of this project was to evaluate the effects of increasing the initial in-place density of asphalt pavements on expected field performance and durability. This study was completed as part of the FHWA’s demonstration project on “Enhanced Durability through Increased In-Place Pavement Density.” Two approaches for increasing in-place density were explored: (i) the addition of an Evotherm warm-mix asphalt (WMA) additive at a dosage rate of 0.6% by the weight of mix; and (ii) the addition of 0.2% asphalt binder (Plus AC) to the design optimum asphalt binder content of standard dense-graded mixtures. The field component of the research involved three 4,000-ft long test sections representing control hot-mix asphalt (HMA) mixtures, Evotherm WMA mixtures, and the Plus AC HMA mixtures. Each test section included a binder and a wearing course for a total of six mixtures. Density measurements were determined in the laboratory from field cores taken at each test section. The high- and intermediate-temperature properties of field cores were evaluated using the Loaded Wheel Tracking and Semi-Circular Bending tests, respectively. Further, the Indirect Tensile Dynamic Modulus (IDT |E*|) test was conducted for full viscoelastic characterization of the asphalt mixtures. The two approaches considered in this study were successful in increasing field density, especially for the binder course mixtures. The two strategies for increasing in-place density also resulted in better than expected resistance to cracking and rutting, as well as an increase in mixture stiffness as measured by the IDT |E*|.

scholarly journals The Use of Colorimeters to Support Remote Sensing Techniques on Asphalt Pavements

2020 ◽  
Vol 12 (23) ◽  
pp. 3911
Author(s):  
Christodoulos Mettas ◽  
Evagoras Evagorou ◽  
Athos Agapiou ◽  
Diofantos Hadjimitsis
Keyword(s):  
Remote Sensing ◽  
Spectral Response ◽  
Ground Truth ◽  
Asphalt Pavements ◽  
Electromagnetic Spectrum ◽  
Ground Truth Data ◽  
Mahalanobis Distances ◽  
Spectral Bands ◽  
Remote Sensing Techniques

Characterization of asphalt pavements, based on ground spectroradiometers, has been studied in the past to determine their spectral response concerning the physical, chemical, and condition properties of the pavement. This paper suggests an alternative technique for characterizing ageing of asphalt pavements using a colorimeter. Colorimeters are considered as affordable equipment in laboratories in contrast to other scientific instruments and turn remote sensing ground techniques more accessible to industry. Therefore, the study proposes a new methodology indicating how colorimeters can be used in combination with satellite data for the age characterization of asphalt pavements. Spectroradiometer data are compared in a two-way methodology to colorimeter data. The final steps of the methodology used in the study show very similar results for both equipment after a comparison of separability indices (Euclidean and Mahalanobis distances). It is a fact that colorimeter data can be used as ground truth data. The application was performed using an in-band analysis of WorldView 3 (WV3) spectral bands situated in the visible electromagnetic spectrum. Based on the findings of this study, we proposed the Normalized Difference Equation/filter for asphalt Pavement Age characterization Index (NDPAI).

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