scholarly journals Influence of High Water Contents on Pavement Layers Stiffness Caused by Flooding

2016 ◽  
Vol 16 (1) ◽  
pp. 40-49 ◽  
Author(s):  
Przemysław Rokitowski ◽  
Marcin Grygierek
Keyword(s):  
Research Work ◽  
Test Site ◽  
Short Review ◽  
High Water ◽  
Point Of View ◽  
The Road ◽  
Road Pavement ◽  
The Us ◽  
Influence Of Water ◽  
Falling Weight

Abstract Moisture inside the construction of road pavements is the problem for road engineers all around the world. This issue is mentioned in many European or the US papers and studies, but still it needs to be developed. From the road engineers’ point of view, very important for solving above problems are the studies on the influence of water and moisture inside the construction of road pavement during deflection measurements using Falling Weight Deflectometer (FWD). The paper raises this issue by showing a short review of Polish and foreign literature and presenting the first step of research work at the test site on Voivodeship Road 933 in Poland.

scholarly journals Pavement Distress Detection Methods: A Review

2018 ◽  
Vol 3 (4) ◽  
pp. 58 ◽  
Author(s):  
Antonella Ragnoli ◽  
Maria De Blasiis ◽  
Alessandro Di Benedetto
Keyword(s):  
Data Collection ◽  
Operating Cost ◽  
Pavement Management ◽  
Point Of View ◽  
Detection Methods ◽  
Technical Improvement ◽  
Pavement Distress ◽  
The Road ◽  
Road Pavement ◽  
Pavement Distress Detection

The road pavement conditions affect safety and comfort, traffic and travel times, vehicles operating cost, and emission levels. In order to optimize the road pavement management and guarantee satisfactory mobility conditions for all road users, the Pavement Management System (PMS) is an effective tool for the road manager. An effective PMS requires the availability of pavement distress data, the possibility of data maintenance and updating, in order to evaluate the best maintenance program. In the last decade, many researches have been focused on pavement distress detection, using a huge variety of technological solutions for both data collection and information extraction and qualification. This paper presents a literature review of data collection systems and processing approach aimed at the pavement condition evaluation. Both commercial solutions and research approaches have been included. The main goal is to draw a framework of the actual existing solutions, considering them from a different point of view in order to identify the most suitable for further research and technical improvement, while also considering the automated and semi-automated emerging technologies. An important attempt is to evaluate the aptness of the data collection and extraction to the type of distress, considering the distress detection, classification, and quantification phases of the procedure.

scholarly journals Effectiveness of the iDOP-PH adhesion promoter in relation to adhesion of the pavement bitumen

2021 ◽  
pp. 201
Author(s):  
Yan Pyrig ◽  
Andrey Galkin ◽  
Pavlo Roman
Keyword(s):  
Thermal Stability ◽  
Research Work ◽  
Inhibitory Effect ◽  
Traffic Load ◽  
Adhesion Promoter ◽  
Adhesion Properties ◽  
Adhesion Promoters ◽  
The Road ◽  
Road Pavement ◽  
Standard Quality

Asphalt pavement is permanently influenced by various environmental conditions and traffic load. Because of this after a certain period numerous defects may appear on the surface of the road pavement. These defects include peeling, chipping, pots, cracks etc. The low water proof resistance of the asphalt concrete (conditioned by low adhesion of the bitumen to aggregate surface) is considered to be one of the reasons for appearance of these defects. Adhesion promoters’ use is the most common method to increase adhesion activity of pavement bitumen. Goal. The objective of the current research work is the evaluation of influence of the domestic adhesion promoter iDOP on the conventional and adhesion properties of bitumen. Methodology. To achieve this goal, the following was done: the effect of the adhesive promoter iDOP on the standard quality indicators of bitumen was determined according the requirements of the current standards DSTY 4044 and SOU 45.2-00018112-067; the effect of the adhesive promoter on the adhesion of bitumen to the glass surface (according to the DSTU B.V.2.7-81 method) and to the surface of aggregates with different mineralogy was evaluated by the rotating bottle method according to DSTU EN 12697-11; the thermal stability of the iDOP-PH promoter was tested by simulating the technological ageing of bitumen according to the method given in GOST 18180 and the RTFOT method. Results. Grounding on the experimental data obtained, it was found that the adhesive promoter iDOP-PH does not affect the standard indicators of the quality of bitumen (penetration, softening and breaking point temperatures, ductility). During hardening with the RTFOT method, a slight inhibitory effect of the promoter is observed, which appears as an increase in the values of residual penetration and ductility compared to bitumen without promoter. The iDOP-PH promoter increases the adhesive capacity of bitumen, which is confirmed by the adhesion data determined by the improved method given in GOST B.V.2.7-81 and the rolling bottle method. Originality. It is shown that the iDOP-PH promoter has a relevantly low thermal stability. With this the main factor affecting the decrease in thermal stability is the long time exposing of the binder at high temperature by GOST B.V.2.7-81 method. Practical value. It is shown that the promoter concentrations recommended by the supplier are insufficient, and to ensure the required values of the adhesion (standardized in СОУ 45.2-00018112-067) it is advisable to increase the concentration of the iDOP-PH promoter in bitumen to 0.3 - 0.6%.

Use of falling weight deflectometer time history data for the analysis of seasonal variation in pavement response

2010 ◽  
Vol 37 (9) ◽  
pp. 1224-1231 ◽  
Author(s):  
Kate Deblois ◽  
Jean-Pascal Bilodeau ◽  
Guy Doré
Keyword(s):  
Phase Angle ◽  
Time History ◽  
Test Site ◽  
Flexible Pavement ◽  
Dissipated Energy ◽  
Falling Weight Deflectometer ◽  
History Data ◽  
The Road ◽  
Pavement Structures ◽  
Falling Weight

This paper presents the results of an exploratory analysis of falling weight deflectometer (FWD) data collected on a large project about the spring thaw behaviour of pavements. The test site includes four test sections, two of which are conventional flexible pavement structures, whereas the other two are built with a cement-treated base. The aim of this study is to verify the applicability of using FWD time history data to evaluate damage to a road during the thawing period. The applicability of the analysis techniques is verified through the phase angle and dissipated energy. The data analyzed were obtained from tests conducted with an FWD on one flexible pavement test section. The results obtained showed a clear difference between the winter, thawing, and summer periods. It was found that the phase angle and dissipated energy can be used to evaluate the road damage during the thawing period through quantification of the phase angle and dissipated energy. These factors can also be used to describe the pavement behaviour in terms of elasticity and viscoelasticity.

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 Study of Load Characteristics of Various Types of Silicon PV Panels for Sustainable Energy Efficient Road Pavement

2019 ◽  
Vol 15 (1) ◽  
pp. 30-38
Author(s):  
Antons Patlins ◽  
Andrii Hnatov ◽  
Shchasiana Arhun ◽  
Hanna Hnatova ◽  
Vasiliy Migal
Keyword(s):  
Energy Efficient ◽  
Sustainable Energy ◽  
Weather Conditions ◽  
Electrical Energy ◽  
Load Resistance ◽  
Point Of View ◽  
The Road ◽  
Road Pavement ◽  
New Type ◽  
Load Characteristics

AbstractThis paper presents a new approach to the creation of innovative roads having sustainable energy efficient road pavement as their basis. It is a new type of intelligent roads that is able to service itself and provide power, i.e. it is also a renewable source of electricity. It is planned to use the studies on the PV panels in sustainable energy efficient road pavement to determine their load parameters. The work used the methods of mathematical analysis and theoretical electrophysics to carry out the studies on load characteristics of various types of silicon PV panels in order to define the most effective panels from the point of view of generated electrical energy load resistance values. The analysis of the obtained results of the experimental research has shown that in order to make the operation of PV panels of series FS-100M and FS-110P most efficient, their load must be maintained within 3–3.5 Ω range. If load resistance exceeds the specified limits, the work of PV panels of this series will be ineffective. The road having a sustainable energy efficient road pavement is able to track road conditions, traffic, weather conditions and react quickly to their changes. It is shown how road markings can change dependance on road conditions.

scholarly journals Pavement Deterioration Predictive Models for a Section of Ijokodo-Apete Road Ibadan, Nigeria

2019 ◽  
Vol 8 (6) ◽  
pp. 4734-4743
Keyword(s):  
Construction Material ◽  
Research Work ◽  
Traffic Volume ◽  
Volume Data ◽  
The Road ◽  
Road Pavement ◽  
Deterioration Rate ◽  
Reconnaissance Survey ◽  
Deterioration Process ◽  
Pavement Distresses

A road pavement is a structure composed of structural elements, whose function is to protect the natural subgrade and to carry the traffic safely and economically. When the roads are open to traffic, the pavements deteriorate with time due to the combined influence of the traffic, construction material and the environment. Due to the great complexity of the road deterioration process, performance models are the best approximate predictors of expected conditions. Hence, the aim of this research work is to develop a predictive model for the rate of potholes deterioration for a section of the Ijokodo –Apete road in Ido Local Government Area of Ibadan. In actualizing the above aim, a reconnaissance survey and inventory were conducted on the selected road section and potholes were discovered as the predominant pavement distresses, chainages were established for easy identification of the potholes positions, some selected potholes were measured and their volume change was monitored. The pavement structural evaluation and traffic volume data were collected. Regression models were developed for the potholes deterioration rate using SPSS (Statistical package for social sciences) package. Conclusively, the model with the highest coefficient of determinant (R2 ) and least standard error was selected as the reliable model and was used to determine the deterioration rate of the independent variables(traffic volume and structural number) selected at random.

scholarly journals Improvement of a bridge connection node with embankment by applying curved approach slabs

2020 ◽  
Vol 7 (2) ◽  
Author(s):  
Vladislav Andreev ◽  
Igor Ovchinnikov
Keyword(s):  
Road Safety ◽  
Technical Condition ◽  
Point Of View ◽  
Dynamic Effects ◽  
The Road ◽  
Approach Slabs ◽  
Road Pavement ◽  
Functional Quality ◽  
On The Road ◽  
Negative Shock

The article is devoted to improving the bridge connection node with embankment by application of curved approach slabs. The most important request by arranging of bridge connection with embankment is to ensure soft entry of transport from the approach embankment to the bridge for the entire period of operation. However, overtime on the road sections of bridge connection with embankment appear soil collapsing, cracks and birdbaths in the carpet. This problem is partially solved by the installation of reinforced-concrete approach slabs buried in the connection zone between the abutment and the approach embankment. Despite the use of straight approach slabs in the bridge-connection node with embankment, the formation of bumps of grade profile is observed, they reduce road safety, worsen the technical condition of vehicles, cause discomfort to the driver and passengers. From the structural and technological point of view, request by arranging of bridge connection by curved approach slabs higher functional quality can be achieved. Due to the soft passage of bridge connection node, it is possible to reduce the negative shock-dynamic effects, which will increase the durability of the connection node and approach road pavement. The article presents several possible to use bridge connection node structures through the use of curved approach slabs: concave, convex and S-shaped. A comparative analysis of bridge-connection structural versions will reveal the most effective construct that can ensure soft passage of the bridge connection node with approach embankment.

scholarly journals Interaction of Physical Parameters and The Strength of Frost Blanket Course in Road Pavement Structure

2018 ◽  
Vol 13 (4) ◽  
pp. 416-428 ◽  
Author(s):  
Lina Bertulienė ◽  
Lina Juknevičiūtė–Žilinskienė ◽  
Henrikas Sivilevičius ◽  
Alfredas Laurinavičius
Keyword(s):  
Strength Properties ◽  
Physical Parameters ◽  
Light Weight ◽  
Falling Weight Deflectometer ◽  
The Road ◽  
Road Pavement ◽  
Pavement Structure ◽  
Pavement Structures ◽  
Falling Weight ◽  
Reliable Correlation

This paper determines the interaction between the physical indicators of frost blanket course and its deflection modulus, measured by static and dynamic devices. The Pilot Road has been selected to examine the strength properties (deflection module) of frost blanket course. A Pilot Road consisting of 27 road sections, divided into 5 different road structures. A Pilot Road has been selected to examine the strength properties (deflection module) of frost blanket course. In this research was determined the strength of frost blanket course in road pavement structures of Pilot Road by four devices: Falling Weight Deflectometer Dynatest 8000, Light Weight Deflectometers Prima 100 and ZORN ZSG 02 and Static Beam Strassentest. The results showed no reliable correlation between the deflection modulus, measured by different devices, and the physical indicators of the frost blanket course of the road pavement structures in Pilot Road.

Mechanical effects and paradoxical phenomena in the thermoelastic stress of the road pavement structures

2018 ◽  
pp. 128-145
Author(s):  
Volodynyr Mozghovyi ◽  
◽  
Viktor Gaidaichuk ◽  
Yurii Zaiets ◽  
Liudmyla Shevchuk ◽  
...  
Keyword(s):  
Thermoelastic Stress ◽  
The Road ◽  
Mechanical Effects ◽  
Road Pavement ◽  
Pavement Structures

ESRC Review

2020 ◽  
pp. 657-698
Author(s):  
Simeon J. Yates ◽  
Jordana Blejmar
Keyword(s):  
Social Research ◽  
Social Science Research ◽  
Research Work ◽  
Science Research ◽  
Wide Range ◽  
The Us ◽  
Levels Of Automation ◽  
The Uk ◽  
Technological World ◽  
Ways Of Being

Two workshops were part of the final steps in the Economic and Social Research Council (ESRC) commissioned Ways of Being in a Digital Age project that is the basis for this Handbook. The ESRC project team coordinated one with the UK Defence Science and Technology Laboratory (ESRC-DSTL) Workshop, “The automation of future roles”; and one with the US National Science Foundation (ESRC-NSF) Workshop, “Changing work, changing lives in the new technological world.” Both workshops sought to explore the key future social science research questions arising for ever greater levels of automation, use of artificial intelligence, and the augmentation of human activity. Participants represented a wide range of disciplinary, professional, government, and nonprofit expertise. This chapter summarizes the separate and then integrated results. First, it summarizes the central social and economic context, the method and project context, and some basic definitional issues. It then identifies 11 priority areas needing further research work that emerged from the intense interactions, discussions, debates, clustering analyses, and integration activities during and after the two workshops. Throughout, it summarizes how subcategories of issues within each cluster relate to central issues (e.g., from users to global to methods) and levels of impacts (from wider social to community and organizational to individual experiences and understandings). Subsections briefly describe each of these 11 areas and their cross-cutting issues and levels. Finally, it provides a detailed Appendix of all the areas, subareas, and their specific questions.

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