scholarly journals Effect of Thickness of Gravel Base and Asphalt Pavement on Road Deformation

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Dongliang He ◽  
Weijun Yang
Keyword(s):  
Numerical Calculation ◽  
Test Section ◽  
Asphalt Pavement ◽  
Road Surface ◽  
Vertical Deformation ◽  
The Road ◽  
Design Requirements ◽  
The Relationship

This study uses a test section of a highway, a study object, to explore the effect of thickness of the gravel base and asphalt layer on the vertical deformation of the road surface. The thickness of the asphalt layer and graded gravel base is changed. The nonlinear description equation of the relationship between the thickness (h1) of the asphalt layer and the vertical deformation (d1) is established: d1=a41−b4h1. The thickness of the asphalt pavement is then determined to reduce vertical deformation. Numerical calculation shows that the maximum vertical deformation of the foundation is within 8 mm, which is less than the 15 mm maximum vertical deformation of the embankment. This level meets the design requirements.

scholarly journals TINJAUAN UMUR RENCANA JALAN PADA TAHUN KE 3 TERHADAP PENURUNAN KINERJA JALAN

Teras Jurnal ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 71
Author(s):  
Adzuha - Desmi
Keyword(s):  
Transportation Network ◽  
Road Surface ◽  
Transportation Infrastructure ◽  
The Road ◽  
The Third ◽  
Marshall Test ◽  
Road Performance ◽  
On The Road ◽  
The Relationship

<p align="center"><strong><em>Abstract</em></strong></p><p>Highway is a land transportation infrastructure that forms a transportation network to connect an area to other regions, so that the wheels of the economy and development can rotate well. This research was based on the road age of the third year of the road Krueng Geukueh - Beureughang, so the researchers wanted to know what factors were the causes of performance degradation on the road and the relationship between the decline in road performance on the material used. In this study includes 3 stages, namely, Core drill, Marshall Test testing and testing of Test Extracts that have been achieved using 8 (Eight) samples. So it can be concluded that there has been a decrease in asphalt levels on the road resulting in damage and decreased performance on the road. Coupled with increased charges within 3 (three) years, therefore repairs to the road are needed. From this research, it is expected to be able to provide input to improve the quality of the material and the layer of road surface pavement.</p><p> </p><strong><em>Keywords :   Decreasing Road Performance, Core Drill,  Marshall Test, Test Extract,  Asphalt Level.</em></strong>

An Investigation of the Slip of a Tire Tread

1997 ◽  
Vol 25 (2) ◽  
pp. 78-95 ◽  
Author(s):  
J. J. Lazeration
Keyword(s):  
Vehicle Control ◽  
Contact Stresses ◽  
Road Surface ◽  
Experimental Characterization ◽  
Small Magnitude ◽  
Surface Loss ◽  
The Road ◽  
Toe Angle ◽  
The Relationship

Abstract Tire performance such as handling, noise, traction, wear, etc., is determined ultimately in the tire footprint. The nature of the distribution of the contact stresses within the tire footprint determine whether or not the tire tread adheres to the road or slips relative to the road surface. Loss of adhesion between the tire tread and the road can be extreme as in gross slippage resulting in the loss of vehicle control or it can be subtle as in the small magnitude slippage that promotes treadwear. This paper presents results from an experimental characterization of the slip between the tread of a free-rolling tire and a simulated road surface. Trajectories of discrete points on the tread surface were measured from the entrance to the exit of the footprint and were used to calculate the total slip of each point. The relationship between the average slip of the tire and toe angle was established. Also, the relationship between toe, camber, and the distribution of tread slip and velocity across the tire footprint, was investigated in this paper.

scholarly journals Tests and Assessment of the Contact Surface of Selected Measuring Tires of Friction Testers with the Airport Surface Depending on Changes in Pressure and Load

2020 ◽  
Vol 50 (2) ◽  
pp. 377-397
Author(s):  
Mariusz Wesołowski ◽  
Paweł Iwanowski ◽  
Paweł Pietruszewski ◽  
Piotr Włodarski
Keyword(s):  
Surface Area ◽  
Significant Influence ◽  
Contact Area ◽  
Contact Surface ◽  
Theoretical Basis ◽  
Road Surface ◽  
The Road ◽  
The Relationship

AbstractThe basis of the work was to estimate the relationship between wheel pressure and wheel pressure on the surface, and the size of the contact surface. The article presents world experience in the field and presents the theoretical basis for calculating the contact area of a wheel with the road surface. The tests were carried out for two types of tires - ASTM E-1551 and ASFT T520. The tests proved a significant influence of the wheel pressure value and wheel pressure on the surface on the obtained surface area of the wheel contact with the surface.

Cold Recycling Technology Application of Old Asphalt Pavement in Rural Road Alteration Engineering

2012 ◽  
Vol 238 ◽  
pp. 497-502
Author(s):  
Zhi Dong Guo ◽  
Jia Liu ◽  
Cang Bo Li
Keyword(s):  
Asphalt Pavement ◽  
New Technology ◽  
Construction Technology ◽  
Technology Application ◽  
The Road ◽  
Recycling Technology ◽  
Structure Surface ◽  
Design Requirements ◽  
Pavement Base ◽  
Cold Recycling

Cold recycling technology of old asphalt pavement is a relatively new technology which has important application in the road surface treatment. Combining with the application of the cold recycling technology in rural old asphalt pavement, this paper analyzes and elaborates its construction technology and experience approach. The existing old asphalt pavement material is used in accordance with the new design requirements to form a special pavement structure surface. On rolling forming sections, the test is conducted for compaction, smoothness, bending and sinking and drill-core sampling for compressive strength. The results show that this process meets the general requirements of pavement base, and the quality is good with the advantages of saving costs and reducing waste damaging the environment.

Study on Modal Analysis and Dynamic Performance of Electric Wheel Self-Dumping Truck Carriage

2011 ◽  
Vol 127 ◽  
pp. 395-399
Author(s):  
Xiao Huo Li ◽  
Jiang Wei Cao ◽  
Shu Ming Liu ◽  
Chao Wang
Keyword(s):  
Frequency Response ◽  
Frequency Response Function ◽  
Dynamic Performance ◽  
Road Surface ◽  
Dump Truck ◽  
Transport Efficiency ◽  
The Road ◽  
Surface Excitation ◽  
The Relationship ◽  
Fatigue Failures

In view of the reality that the transport efficiency affected directly by fatigue failures on a carriage of a electric wheel self-dumping truck in running process, in order to inquiry the failure reason and study the relationship between the dynamic performance of the carriage and the natural frequency of the carriage, ANSYS finite software was used to analysis the dump truck carriage model created by PRO/E in the paper, the low-level frequency and the vibration of the dump truck carriage were obtained, and the carriage’s dynamic performance was studied with the verification principle of reducing the amplitude of frequency response function in resonance. The results show that the road surface excitation greatly affects the dynamic performance on the compartment floor, and the road surface excitation, which should be avoided, is the main reason of fatigue failure on the carriage.

A Peg-Top Oriented Thermal Conductive Structure of Asphalt Pavement for Improving Urban Microclimate

2014 ◽  
Vol 1079-1080 ◽  
pp. 469-475
Author(s):  
Yin Fei Du ◽  
Sheng Yue Wang
Keyword(s):  
Heat Conduction ◽  
Solar Radiation ◽  
Asphalt Pavement ◽  
Road Surface ◽  
Radiation Absorption ◽  
Heat Island ◽  
Contrast Structure ◽  
The Road ◽  
Island Effect ◽  
Urban Heat

In order to reduce the road surface temperature and improve the efficiency of heatconduction within the pavement, a peg-top oriented heat conduction structure(POCS) was designed. Meanwhile, two indexes, the peak temperature at the roadsurface and accumulated solar radiation absorption, of the structure werecompared with those of the contrast structure. Results showed that the peaktemperature at the road surface was reduced by 4.4°C, and the accumulated solarradiation absorption was increased by 11.3%. These suggest that the POCS canrelease less heat to atmosphere and absorb more solar radiation, and isexpected to be applied to urban roads to mitigate the urban heat island effect

scholarly journals AN EMPIRICAL STUDY OF THE ROAD SURFACE MANAGEMENT CRITERIA FOR POROUS ASPHALT PAVEMENT OF EXPRESSWAY

2013 ◽  
Vol 69 (3) ◽  
pp. I_175-I_183
Author(s):  
Bumpei MIYAZAKI ◽  
Takayuki KAZATO ◽  
Masaki HAMAKAJI ◽  
Kengo OBAMA ◽  
Kiyoyuki KAITO
Keyword(s):  
Empirical Study ◽  
Asphalt Pavement ◽  
Road Surface ◽  
Porous Asphalt ◽  
The Road

scholarly journals GEORADARO TAIKYMAS ASFALTO DANGŲ ĮRENGIMO KOKYBEI ĮVERTINTI / EVALUATION OF THE USE OF GPR IN QUALITY CONTROL OF ASPHALT PAVEMENT LAYERS

2018 ◽  
Vol 10 (0) ◽  
pp. 1-5
Author(s):  
Andrius Baltrušaitis ◽  
Audrius Vaitkus
Keyword(s):  
Ground Penetrating Radar ◽  
New Technologies ◽  
Asphalt Pavement ◽  
Rapid Development ◽  
Road Surface ◽  
Air Voids ◽  
The Road ◽  
Pavement Layers ◽  
Ground Penetrating

The optimum density and air-voids content of asphalt pavement layers are among the main indicators of the durability of asphalt road pavement. The asphalt pavement with insufficient density is less resistant to traffic loading and the damaging effects caused by water. Air-voids ensure the durability of asphalt pavement and the accumulation of free bitumen during a period of hot weather. At present, the main ways to control the quality of compaction and the content of air-voids is to drill core specimens and test them in the laboratory. This method is expensive, it damages the road surface, and the quality of asphalt pavement is verified only at several points. With the rapid development of new technologies, it is necessary to evaluate and to apply innovative non-destructive methods, allowing us to determine the qualitative characteristics of asphalt pavement across the entire length of the road without causing the damage to the road surface and at lower costs. This article describes the use of Ground Penetrating Radar to determine asphalt pavement density and air-voids content provides an overview of global practices and feasibility analysis on the application of Ground Penetrating Radar on the roads of Lithuanian. Santrauka Asfalto dangos sluoksnių optimalus tankis ir oro tuštymių kiekis yra vieni iš pagrindinių dangos ilgaamžiškumo rodiklių. Nepakankamo tankio danga yra mažiau atspari automobilių eismo apkrovoms ir žalingam vandens poveikiui. Oro tuštymės užtikrina dangos ilgaamžiškumą ir laisvojo bitumo akumuliavimą karštuoju metų laikotarpiu. Šiuo metu pagrindinis būdas kontroliuoti sutankinimą ir oro tuštymių kiekį yra gręžti kernus ir juos bandyti laboratorijoje. Šis metodas yra brangus, gadinama kelio danga ir asfalto dangos kokybė patikrinama tik keliuose taškuose. Sparčiai vystantis technologijoms būtina įvertinti ir taikyti inovatyvius neardančiuosius metodus, leidžiančius kokybinius asfalto dangos rodiklius nustatyti neardant dangos, išilgai viso kelio ir mažesnėmis sąnaudomis. Šiame straipsnyje pateikta georadaro (angl. Ground Penetrating Radar) taikymo asfalto dangai sutankinti ir oro tuštymių kiekiui nustatyti pasaulinės praktikos apžvalga ir panaudojimo Lietuvos automobilių keliuose galimybių analizė.

Tire-Road Interactions — Harmony or Conflict?

1989 ◽  
Vol 17 (1) ◽  
pp. 66-84
Author(s):  
A. R. Williams
Keyword(s):  
Rolling Resistance ◽  
Major Effect ◽  
Road Surface ◽  
Interactive Effects ◽  
Central Theme ◽  
Water Drainage ◽  
The Road ◽  
Truck Tires ◽  
Road Surfaces ◽  
Tire Wear

Abstract This is a summary of work by the author and his colleagues, as well as by others reported in the literature, that demonstrate a need for considering a vehicle, its tires, and the road surface as a system. The central theme is interaction at the footprint, especially that of truck tires. Individual and interactive effects of road and tires are considered under the major topics of road aggregate (macroscopic and microscopic properties), development of a novel road surface, safety, noise, rolling resistance, riding comfort, water drainage by both road and tire, development of tire tread compounds and a proving ground, and influence of tire wear on wet traction. A general conclusion is that road surfaces have both the major effect and the greater potential for improvement.

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