scholarly journals Sensitivity Analysis of Determining the Material Parameters of an Asphalt Pavement to Measurement Errors in Backcalculations

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 873
Author(s):  
Paweł Tutka ◽  
Roman Nagórski ◽  
Magdalena Złotowska ◽  
Marek Rudnicki
Keyword(s):  
Fatigue Life ◽  
Measurement Errors ◽  
Pavement Condition ◽  
Material Parameters ◽  
The Road ◽  
Nondestructive Tests ◽  
Road Pavement ◽  
Falling Weight ◽  
Pavement Reinforcement ◽  
The Impact

Nondestructive tests of road pavements are among the most widely used methods of pavement condition diagnostics. Deflections of road pavement under a known load are most commonly measured in such tests, e.g., with the use of falling weight deflectometer (FWD). Measured values allow to determine the material parameters of the road structure, corresponding to the obtained results, by means of backcalculations. Among the factors that impact on the quality of results is the accuracy of deflection measurement. Deflection basins with small differences of displacement values may correspond to significantly different combinations of material parameters. Taking advantage of them for mechanistic calculations of road pavement may eventually lead to incorrect estimation of the remaining fatigue life and then inadequate selection of pavement reinforcement. This study investigated the impact of measurement errors on the change of the obtained values of stiffness moduli of flexible road pavement layers. Additionally, the influence of obtained material parameters on the values of key pavement strain, and consequently on its design fatigue life was presented.

scholarly journals WIM BRIDGE SYSTEM EVALUATION ON ROAD PAVEMENT (A STUDY CASE OF SEMARANG TOLL ROAD SECTION ABC)

2020 ◽  
Vol 2 (01) ◽  
pp. 36-44
Author(s):  
Kusumo Dradjad Sutjahjo ◽  
Firhan Yazid ◽  
Danang Eko Saputro
Keyword(s):  
Residual Life ◽  
Pavement Condition ◽  
The Road ◽  
Toll Road ◽  
Road Pavement ◽  
Road Section ◽  
Pavement Damage ◽  
Aashto 1993 ◽  
The Impact ◽  
Bridge System

Semarang Toll Road  Section ABC is one of many toll roads that are traversed by transport vehicles with a load exceeding the permit limit, especially for vehicles originating from the Port of Tanjung Mas. These overloaded vehicles cause a decrease in pavement condition due to pavement damage on Semarang Section ABC Toll Road Section. This study aims to determine the magnitude of the impact of overload vehicles on the remaining life of the road by using overload vehicle detection from the Weight in Motion Bridge system. The method used in this study refers to Bina Marga Pd T-05-2005-B and AASHTO 1993. Based on the results of the analysis that has been done, it can be concluded that there is a decrease in residual life due to overloading vehicles for the year 2022 in Section A, Line A reaches conditions of 26.93% and 37,46%; Section B Line A achieves pavement failure; Section C of Line A reaches 44.65% and 38.33% conditions; Section A Lane B reaches 32.02%; Section B Lane B achieves failure pavement; and Section C of Line B reaching 54.42% and 40.70%.

scholarly journals Pavement Crack Detection from Hyperspectral Images Using a Novel Asphalt Crack Index

2020 ◽  
Vol 12 (18) ◽  
pp. 3084 ◽  
Author(s):  
Mohamed Abdellatif ◽  
Harriet Peel ◽  
Anthony G. Cohn ◽  
Raul Fuentes
Keyword(s):  
Crack Detection ◽  
Early Stage ◽  
Visible Spectrum ◽  
Hyperspectral Data ◽  
Hyperspectral Images ◽  
Surface Material ◽  
Pavement Condition ◽  
The Road ◽  
Road Pavement ◽  
Crack Index

Detection of road pavement cracks is important and needed at an early stage to repair the road and extend its lifetime for maintaining city roads. Cracks are hard to detect from images taken with visible spectrum cameras due to noise and ambiguity with background textures besides the lack of distinct features in cracks. Hyperspectral images are sensitive to surface material changes and their potential for road crack detection is explored here. The key observation is that road cracks reveal the interior material that is different from the worn surface material. A novel asphalt crack index is introduced here as an additional clue that is sensitive to the spectra in the range 450–550 nm. The crack index is computed and found to be strongly correlated with the appearance of fresh asphalt cracks. The new index is then used to differentiate cracks from road surfaces. Several experiments have been made, which confirmed that the proposed index is effective for crack detection. The recall-precision analysis showed an increase in the associated F1-score by an average of 21.37% compared to the VIS2 metric in the literature (a metric used to classify pavement condition from hyperspectral data).

scholarly journals Flexible pavement rehabilitation with continuously reinforced concrete slab with HFRP bars - mechanistic analysis

2019 ◽  
Vol 262 ◽  
pp. 05019
Author(s):  
Magdalena Złotowska ◽  
Roman Nagórski ◽  
Piotr Radziszewski ◽  
Michał Sarnowski ◽  
Paweł Tutka
Keyword(s):  
Fatigue Life ◽  
Environmental Factors ◽  
Negative Impact ◽  
Concrete Slab ◽  
Mechanistic Model ◽  
Continuous Reinforcement ◽  
Reinforced Concrete Slab ◽  
Pavement Rehabilitation ◽  
The Road ◽  
Road Pavement

Asphalt road pavements are subject to damage under the influence of loads from the traffic of vehicles and of the environmental factors. One of the ways to strengthen damaged flexible pavements is to apply a cement concrete overlay with continuous reinforcement. The purpose of this paper is to analyze the road structure with concrete overlay with continuous reinforcement HFRP composite bars, which is laid on the existing cracked asphalt layers of a typical flexible road of KR3 traffic category. In HFRP bars some of the basalt fibers have been replaced with carbon fibers with the addition of resin binders. This do the possibility of making concrete slabs with increased resistance for environmental aggression, with good mechanical properties, which is especially important in the case of road constructions. An analysis of fatigue life of the strengthened asphalt pavement with a concrete slab with continuous reinforcement of HFRP bars was carried out, implementing the mechanistic model of the pavement structure. The stress analysis in the structure under the action of static loading was determined by the Finite Element Method using the Abaqus/Standard program. The maximum value of stress caused by temperature gradient in the concrete slab was calculated from the Westergaard’s formula for infinite slab. It has been shown that strengthening the analyzed road pavement with a continuous reinforcement is a technology that ensures an increase in fatigue life and reinforcement with HFRP bars further increases durability due to the negative impact of environmental factors.

scholarly journals THE HEAVY VECHICLES INTERACTION WITH ROAD PAVEMENT INFLUENCE TO CONSTRUCTION LAYERS ANALYZIS / SUNKIŲJŲ AUTOMOBILIŲ SĄVEIKOS SU KELIO DANGA IR JŲ ĮTAKOS KONSTRUKCIJOS SLUOKSNIAMS ANALIZĖ

2011 ◽  
Vol 3 (2) ◽  
pp. 103-109 ◽  
Author(s):  
Jurij Sokolov ◽  
Henrikas Sivilevičius
Keyword(s):  
Axial Load ◽  
Negative Influence ◽  
Movement Speed ◽  
Heavy Vehicle ◽  
Intensity Increase ◽  
Vehicle Traffic ◽  
The Road ◽  
Road Pavement ◽  
Pavement Construction ◽  
The Impact

Smoothness is the main feature of road exploitation. It particularly affects movement speed, safety and driving comfort. Evenness of the road belongs of three factors: strength of the pavement construction, heavy vehicle traffic and the impact of the axle mass over it’s term of exploitation. The main negative influence on Lithuanian roads has a overloaded heavy vehicle in excess of the permissible axle load limits. Static and dynamic vehicle weighing equipment and technologies were presented in the article. This article explores overloaded heavy vehicle damage done to Lithuanian roads and its intensity increase. Discuss the basic preventive techniques and methods to prevent the rapid wear of pavements. Also analysis of changes in axial load data through the 2009 August is done.

scholarly journals Durability of concrete pavement strengthened with asphalt layer with FRP fibres

2018 ◽  
Vol 64 (3) ◽  
pp. 81-97
Author(s):  
P. Tutka ◽  
R. Nagórski ◽  
P. Radziszewski ◽  
M. Sarnowski ◽  
M. Złotowska
Keyword(s):  
Fatigue Life ◽  
Concrete Slab ◽  
Asphalt Mixture ◽  
Concrete Pavement ◽  
Cement Concrete ◽  
Asphalt Overlay ◽  
Road Pavement ◽  
Traffic Loads ◽  
Pavement Structures ◽  
The Impact

SummaryPavements made of cement concrete, used for road constructions, are damaged during use. This applies to both the pavements of rural and forest roads with very low traffic loads, as well as road pavements with high traffic loads. One of the most effective ways of repairing damaged concrete cement pavements is through placing an asphalt overlay on a concrete slab. In order to increase the fatigue life of the asphalt overlay, asphalt mixtures are modified with fibres. One technological solution is to use FRP (Fiber Reinforced Polymer), an innovative material with improved properties. The aim of this paper is to assess the impact of asphalt overlays modified with a new type of fibres to strengthen the durability of weakened cement concrete pavement structures. On the basis of the conducted analyses, it was shown that the use of an asphalt layer reinforcement increases fatigue life, for both 15 cm thick prefabricated slabs and a typical road pavement for average traffic made of 25 cm doweled and anchored concrete slabs. There was a significant increase in the fatigue life of the concrete pavement structure as a result of modifying the overlaid asphalt mixture with FRP fibres.

scholarly journals The Impact of Road Maintenance Substances on Metals Surface Corrosion

2011 ◽  
Vol 1 (4) ◽  
pp. 92-96
Author(s):  
Jolita Petkuvienė ◽  
Dainius Paliulis
Keyword(s):  
Water Resources ◽  
Metal Surface ◽  
Road Maintenance ◽  
Metallic Elements ◽  
The Road ◽  
Surface Corrosion ◽  
Road Pavement ◽  
Deicing Salts ◽  
The Impact ◽  
Soil And Water

The purpose of research is to assess changes in the visual metal surface due to the exposure of road maintenance salts and molasses (‘Safecote’). Chlorides of deicing salts (NaCl, CaCl2) are the main agents affecting soil and water resources as well as causing the corrosion of roadside metallic elements. Molasses (‘Safecote’) is offered as an alternative to deice road pavement by minimizing the corrosion of metal elements near the road. A laboratory experiment was carried out to immerse and spray metals with NaCl, CaCl2, NaCl:CaCl2 and NaCl:Safecote solutions. The obtained results showed that NaCl:Safecote solution had the lowest coating with corrosion products (the average 17±4 % of the surface). The solutions of NaCl, CaCl2 and NaCl:CaCl2 had the highest percentage rate of the corrosion product on the metal surface reaching an average of 33±5 %.

scholarly journals Influence of climatic conditions on the occurrence of wheel track deformation on asphalt paved roads

2021 ◽  
Vol 264 ◽  
pp. 02028
Author(s):  
Iroda Saidakberova ◽  
Sirojiddin Yadgarov ◽  
Bobomurod Qurbonov ◽  
Zulfiya Pulatova
Keyword(s):  
Climatic Factors ◽  
Climatic Conditions ◽  
Dynamic Force ◽  
The Road ◽  
Transverse Dynamic ◽  
Road Pavement ◽  
The Impact ◽  
Track Deformation ◽  
Wheel Track ◽  
Repeated Loads

When the car moves, a vertical, longitudinal and transverse dynamic force is generated, where there is a link between the road cover and the wheel. Repeated loads from vehicles and the impact of climatic factors lead to deformation in the pavement and pavement of the road. In deformation and deformation, the geometric dimensions and durability of the road pavement are lost. Disturbances-loss of dimensions and loss of durability of parts of the construction is understood. In practice, all types of deformation and distortion are often regarded as a drawback of road conditions [1].

Practice Analysis of Urban Road Pavement Roughness and Detect of Destruction

2011 ◽  
Vol 250-253 ◽  
pp. 3688-3691
Author(s):  
Jr Hung Peng ◽  
Po Hsun Sung ◽  
Jyh Dong Lin ◽  
Kuang Yi Wei
Keyword(s):  
Management System ◽  
Maintenance Management ◽  
Conservation Strategy ◽  
Road Maintenance ◽  
Pavement Condition ◽  
Urban Road ◽  
The Road ◽  
Road Pavement ◽  
Pavement Roughness ◽  
New Construction

The urban road becoming more perfect, pavement engineering is from new construction to maintenance management. The authorities, from acceptance the new construction turn into survey of the road‘s situation and control of various types of damage and road conditions on time, to maintain a good condition of the road. In this study we use the CCD with the general Global Positioning System to provide GPS coordinates and have a street shooting for each 20m of road, record of the CCD road imaging system, and with GPS coordinates, the street pavement shooting can identify the highest frequency distress type within 100m of the road, and compare with the value of IRI for statistics, considering different distress conditions associated with the International Roughness Index, and to explore the causes. This study has an Urban Road Management System, it divided into road flat index query and pavement condition index query, and user can use this system know the pavement condition every section. The road maintenance unit can be judged by this indicator status of pavement roughness to develop a conservation strategy of each section, reflecting the degree of conservation of each section, making the pavement to maintain a good quality. Urban road maintenance management system is for the each authorities built the road pavement maintenance management system for pavement managers with different levels of management authority, and to assist in the system can provide information for urban roads to do planning, query and management, it is beneficial to the authorities to implementation of urban roads and other road maintenance operations, they can immediately understand the pavement condition.

scholarly journals MAPPING AND ASSESSMENT OF TRAFFIC CONGESTION ON MAJOR ROADS IN MINNA (CASE STUDY OF CHANCHAGA L.G.A)

2017 ◽  
Vol 4 (2) ◽  
pp. 171 ◽  
Author(s):  
Oluibukun Gbenga Ajayi ◽  
Ayodeji Timothy Oluwunmi ◽  
Joseph Olayemi Odumosu ◽  
Taiwo James Adewale
Keyword(s):  
Traffic Flow ◽  
Traffic Congestion ◽  
Road Networks ◽  
Urban Centre ◽  
Pavement Condition ◽  
The Road ◽  
Road Pavement ◽  
Analysis Of Results ◽  
Narrow Road ◽  
Road Corridors

The level of urbanization in the developing world indicates that more people live in cities now than before. As urbanization increases, road usage also increases proportionately which sometimes introduce some strain to the existing road and as a consequence constitutes some impediments to free traffic flow. The situation described above is on the increase in Chanchaga Local Government Area of Niger State, an urban centre in North Central, Nigeria. In order to investigate the probable causes and degree of severity of this menace, an attempt has been made in this research to investigate and map out the nature of traffic congestion frequently experienced on some selected roads within Chanchaga LGA. These road networks include Kpakungun - Gidan Kwano road, Bosso-Mobil route, Bosso – Mekunkele route, Kpakungun – city gate road and Book roundabout – Mobil Route. Using a 1m Pan-Sharpened spatial resolution IKONOS Image, handheld GPS receivers, and manual traffic count, the traffic patterns of the selected road networks within the study area were assessed and mapped out. A Geo-Database was also designed for the routes which provide information about the road pavement condition, average traffic volume, adjacent land use, etc. Analysis of results and other queries performed revealed that the most probable causes of traffic congestion in Chanchaga LGA include narrow road width, bad road pavement and indiscriminate parking of vehicles along the road corridors, especially by commercial cab drivers. Conclusively, it was observed that the Kpakungun axis of Minna – Bida road is the most congested route of all the road networks considered, closely followed by the Bosso-Mobil Road. The traffic gridlock along these routes is most prominent on Mondays and Wednesdays (around 8 am and 4 pm) and also on Fridays (around 1-4pm). Also, a free traffic flow is often experienced on Saturdays by 8 am which gradually builds into a synchronized flow around the evening time on all the road networks considered.  

Mechanical performance in field conditions of treated and stabilized granular materials used in unpaved roads: a longitudinal study

2014 ◽  
Vol 41 (2) ◽  
pp. 97-105
Author(s):  
L. Beaulieu ◽  
R. Pleau ◽  
P. Pierre ◽  
P. Poulin ◽  
S. Juneau
Keyword(s):  
Granular Material ◽  
Mechanical Performance ◽  
Field Tests ◽  
Field Conditions ◽  
The Road ◽  
On The Road ◽  
Materials Used ◽  
Falling Weight ◽  
Road Following ◽  
The Impact

The main objective of this article is to propose a methodology to evaluate and to study the mechanical performance of various hygroscopic, organic and synthetic dust suppressants and stabilization agents through field tests. Different road sections were treated for several years and many tests have been conducted. The impact on the mechanical performance of the treated granular material has been studied under field conditions by evaluating the deterioration of the road following the spreading of the product on the road. Field tests were conducted over three years in summers 2007, 2008, and 2009. The deterioration of the road is evaluated in terms of improper cross section, inadequate roadside drainage, corrugations, dust, potholes, ruts, and loose aggregates. To evaluate the influence of stabilization agents on the bearing capacity of the granular material on the road, falling weight deflectometer (FWD) tests have also been performed.

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