Linear Tracking Performance Tests on Full-Depth Asphalt Pavement

1997 ◽  
Vol 1570 (1) ◽  
pp. 39-47 ◽  
Author(s):  
J. Groenendijk ◽  
C. H. Vogelzang ◽  
A. Miradi ◽  
A. A. A. Molenaar ◽  
L. J. M. Dohmen
Keyword(s):  
Design Method ◽  
Asphalt Pavement ◽  
Heavy Traffic ◽  
Design Criterion ◽  
Public Works ◽  
Materials Testing ◽  
Wheel Load ◽  
The Road ◽  
Almost All ◽  
Tracking Device

A 0.15-m-thick gravel asphalt concrete (AC) pavement on a sand subgrade was loaded with 4 million repetitions of a 75-kN super-single wheel load using the linear tracking device (LINTRACK) heavy-traffic simulator. Frequent measurements were carried out, including asphalt strain, temperature, rutting, cracking, and falling weight deflectometer measurements, to investigate the performance of full-depth asphalt pavements. The subsequent data analysis indicated that the life of the tested asphalt pavement, according to the Dutch fatigue-design criterion (halving the asphalt stiffness), was 2 to 4 times longer than predictions based on the pavement-design method of the Road and Hydraulic Engineering Division (RHED) of the Dutch Ministry of Transport, Public Works and Water Management. Thus, this method does not give an unsafe design. The analysis also indicated that halving of the asphalt stiffness, implying structural distress, occurred before any cracking was visible at the pavement surface. Almost all visible cracking occurring later in this test pavement consisted of surface cracking instead of structural cracking. Therefore, the structural distress did not grow upward to form the visible cracks at the surface, but the latter formed independently. The same was observed on Dutch highways, which are much thicker. These conclusions are based on only one test section, although supplemented with extensive materials testing, and verification with other tests is necessary.

scholarly journals Performance Evaluation of Hot Mix Asphalt with Different Proportions of RAP Content

2018 ◽  
Vol 34 ◽  
pp. 01026
Author(s):  
Ahmad Kamil Arshad ◽  
Haryati Awang ◽  
Ekarizan Shaffie ◽  
Wardati Hashim ◽  
Zanariah Abd Rahman
Keyword(s):  
Hot Mix Asphalt ◽  
Resilient Modulus ◽  
Design Method ◽  
Asphalt Pavement ◽  
Cost Savings ◽  
Volumetric Analysis ◽  
Public Works ◽  
Asphalt Binders ◽  
Moisture Susceptibility ◽  
Asphalt Mixes

Reclaimed Asphalt Pavement (RAP) is old asphalt pavement that has been removed from a road by milling or full depth removal. The use of RAP in hot mix asphalt (HMA) eliminates the need to dispose old asphalt pavements and conserves asphalt binders and aggregates, resulting in significant cost savings and benefits to society. This paper presents a study on HMA with different RAP proportions carried out to evaluate the volumetric properties and performance of asphalt mixes containing different proportions of RAP. Marshall Mix Design Method was used to produce control mix (0% RAP) and asphalt mixes containing 15% RAP, 25% RAP and 35% RAP in accordance with Specifications for Road Works of Public Works Department, Malaysia for AC14 dense graded asphalt gradation. Volumetric analysis was performed to ensure that the result is compliance with specification requirements. The resilient modulus test was performed to measure the stiffness of the mixes while the Modified Lottman test was conducted to evaluate the moisture susceptibility of these mixes. The Hamburg wheel tracking test was used to evaluate the rutting performance of these mixes. The results obtained showed that there were no substantial difference in Marshall Properties, moisture susceptibility, resilient modulus and rutting resistance between asphalt mixes with RAP and the control mix. The test results indicated that recycled mixes performed as good as the performance of conventional HMA in terms of moisture susceptibility and resilient modulus. It is recommended that further research be carried out for asphalt mixes containing more than 35% RAP material.

Rutting Development in Linear Tracking Test Pavements To Evaluate Shell Subgrade Strain Criterion

1997 ◽  
Vol 1570 (1) ◽  
pp. 23-29 ◽  
Author(s):  
J. Groenendijk ◽  
C. H. Vogelzang ◽  
A. Miradi ◽  
A. A. A. Molenaar ◽  
L. J. M. Dohmen
Keyword(s):  
Data Analysis ◽  
Shear Deformation ◽  
Asphalt Concrete ◽  
Heavy Traffic ◽  
Falling Weight Deflectometer ◽  
Wheel Load ◽  
Strain Criterion ◽  
Average Criterion ◽  
Tracking Device ◽  
Falling Weight

Two full-depth gravel asphalt concrete (AC) pavements of 0.15- and 0.08-m thickness on a sand subgrade were loaded with 4 million and 0.65 million repetitions of a 75-kN super-single wheel load using the linear tracking device (LINTRACK), a heavy-traffic simulator. Frequent measurements of asphalt strains, temperatures, rutting, cracking, and falling weight deflectometer (FWD) were made. The data analysis of the rutting measurements indicates that all rutting could be ascribed to subgrade deformation (secondary rutting). No evidence was found of shear deformation within the asphalt layer (primary rutting). The data analysis also indicates that the observed rutting performance of the LINTRACK test sections (to a maximum rut depth of 18 mm) coincides closely with the average criterion from the Shell Pavement Design Manual, which relates subgrade strain to allowable number of strain repetitions.

The Tension Fracture Simulation on the Asphalt Pavement with the Insufficient Compaction Roadbed

2011 ◽  
Vol 243-249 ◽  
pp. 3868-3872
Author(s):  
Lai Gui Wang ◽  
Mei Sheng Feng ◽  
Hong Zhu Zhang
Keyword(s):  
Tensile Stress ◽  
Asphalt Pavement ◽  
Crack Model ◽  
Tension Stress ◽  
Wheel Load ◽  
Tension Crack ◽  
Discontinuous Surface ◽  
The Road ◽  
Fracture Simulation ◽  
Pavement Structure

For the study of soft subgrade pavement cracking process, it establishes the pavement structure tension crack model by elastic layered theory. Based on the finite element method, it studies the tension crack evolution process. It establishes the tension crack stress criterion to the roadbed. Analysis shows that the distresses of asphalt pavement of the real highway results from the damage by asymmetric sedimentation which is under excessively axle loading on pavement structure, rather than the fatigue damage by axle loading repetitions in the condition of asymmetric intensity in the same layer. The results show that the soft degree of the subgrade is proportional to the tensile stress, the more localized soft, the easier to crack the road. The soft roadbed does not have a homogeneous structure of the road surface, the tension stress rupture occurred in the discontinuous surface. The road structure has a set of tensile stress under the circulation wheel load, it formats a new fracture surface, and the structure form corresponding evolves, and causes stress state change. At last most of the road sub-base crack, and surface cracking occurres, so the pavement failure.

scholarly journals Rutting Resistance Evaluation of Structural Combinations of Asphalt Pavement Subjected to Heavy Duty

2012 ◽  
Vol 5 ◽  
pp. 316-321 ◽  
Author(s):  
Ze Jiao Dong ◽  
Xiang Bing Gong ◽  
Gui Qing Xiao ◽  
Teng Long
Keyword(s):  
Structural Design ◽  
Design Method ◽  
Asphalt Pavement ◽  
Single Layer ◽  
Asphalt Mixtures ◽  
Heavy Duty ◽  
Wheel Load ◽  
Rutting Resistance ◽  
Pavement Structures ◽  
Resistance Performance

Rut，referred to as a common damage of asphalt pavement ，is still a knotty problem to pavement researchers. Many reasons could cause rut, among which heavy duty, improper pavement structural combination design are two principal factors. As a result, three pavement structures and seven types of asphalt mixtures were used to evaluate the rutting resistance performance of different structural combinations. At first, through Marshall design method, the properties of asphalt mixtures were obtained such as gradation, asphalt content and so on. Based on the comparison of gradations and anti-rutting additives, the single layer rut was tested by wheel tracking test. Then, in order to consider influence of pavement structural design on pavement rut, six types of structure combinations under identical heavy duty condition were designed to perform rutting test. It shows that anti-rutting gradation and anti-rutting additives can improve rutting resistance performance of single layer. Also, a proper structural design could provide a better bearing capacity of wheel load even for heavy duty. It is better to integrate the anti-rutting gradation and anti-rutting additives into structural design. In this paper the results provide some new insight into the relationship between rutting resistance and mixture gradation, anti-rutting additives, heavy duty and structural combination. The consideration of these factors will give a better pavement design.

Fatigue Design of Leaf Spring Based on Proving Ground

2004 ◽  
Vol 261-263 ◽  
pp. 1295-1300
Author(s):  
Il Seon Sohn ◽  
Dong Ho Bae ◽  
Won Seok Jung ◽  
S.J. Park
Keyword(s):  
Design Method ◽  
Maximum Load ◽  
Fatigue Tests ◽  
Design Criterion ◽  
Bending Test ◽  
Leaf Spring ◽  
Bending Fatigue ◽  
The Road ◽  
Fatigue Design ◽  
Test Result

The suspension system of vehicle is directly influenced to ride and handling. Therefore, suspension part should have enough endurance during its lifetime to protect passenger. Spring is one of major suspension part of vehicle. Thus, in this paper, a fatigue design method for leaf spring based on proving ground response was proposed. At first, stress and displacement of leaf spring are measured through the proving ground test. And next, the maximum load acting on leaf spring assembly under driving condition was defined from the road load response. On the base of these results, fatigue tests for leaf spring assembly and 3-point bending fatigue tests for material of leaf spring were carried out. From the above, the maximum load-fatigue life relation of leaf spring material and assembly was defined, and 3-point bending test result has good agreement with leaf spring assembly fatigue test result. Thus, it is expect that economical fatigue design criterion for leaf spring assembly can be determined from fatigue data of simple smooth specimen by 3 point bending fatigue tests.

scholarly journals Measurement of Radiocarbon Content in Leaves from Some Japanese Sites

Radiocarbon ◽  
2001 ◽  
Vol 43 (2B) ◽  
pp. 695-701 ◽  
Author(s):  
Yasushi Muraki ◽  
Kimiaki Masuda ◽  
Kh A Arslanov ◽  
Hiroaki Toyoizumi ◽  
Masataka Kato ◽  
...  
Keyword(s):  
Heavy Traffic ◽  
City Region ◽  
Mountain Areas ◽  
The Road ◽  
Nuclear Bomb ◽  
Low Concentrations ◽  
Bomb Test ◽  
Big City ◽  
Almost All ◽  
The City

We have measured radiocarbon contents in leaves collected from 15 sites in Japan, including mountain areas and big city areas for last three years. Comparing the radiocarbon contents in various areas, high 14C concentrations (80–100‰ as δ14C) are seen for the leaves from the mountain and country sites. On the contrary, low concentrations (5–40‰) were observed for the leaves from city region, especially near the road with heavy traffic. These results indicate that the atmosphere of the mountain and country sites in Japan is still clean but the CO2 gas coming from fossil non-radioactive carbon significantly pollutes the atmosphere of the city sites. The value of δ14C for the mountain areas implies that 14C produced by nuclear bomb test in 1960s still remains. The decrease of δ14C at heavy traffic sites in Tokyo is consistent with the increase of CO2 concentration in the atmosphere assuming that almost all CO2 gas in this region originates from the fossil fuel.

A Study on Job Satisfaction among Tamil Nadu State Transport Corporation (TNSTC) Employees at Tiruvarur Branch

GIS Business ◽  
2019 ◽  
Vol 14 (6) ◽  
pp. 230-242
Author(s):  
M. Ganesan, K ◽  
K. Veerakumar ◽  
N. R Vembu ◽  
Dr. M. K Durgamani ◽  
Dr. Renuka
Keyword(s):  
Job Satisfaction ◽  
Job Stress ◽  
Tamil Nadu ◽  
Heavy Traffic ◽  
Road Transportation ◽  
The Road ◽  
Tamil Nadu State ◽  
On The Road ◽  
Day By Day ◽  
Labour Turnover

Job satisfaction is an important factor for employees working in formal and informal sector. The job is small or big, permanent or temporary, risky or non-risky, job satisfaction is important. It is the mental feeling which drives the employees to excel. Job satisfaction is a combination of psychological, physiological and environmental circumstances. A satisfied employee is a contented and happy human being. The labour turnover depends upon job satisfaction. Even highly paid employees quit the job when they are not satisfied with the job. Road transportation in Tamilnadu is growing day by day. Job stress in the road transportation is very high due to increase in number of vehicle playing on the road and heavy traffic. The drivers and conductors working in public transport corporation are suffering from high job stress. If drivers and conductors are not satisfied with their job which leads to mental stresses and affects the productivity and also creates accidents. In this present study the researchers made an attempt to study the level of job satisfaction among the drivers and conductors who are working in the Tamilnadu State Transport Corporation (TNSTC). The study reveals the expectations of drivers and conductors working in TNSTC with regards to the attributes like salary, promotion and fringe benefits etc., are satisfactory and not detrimental. 

ACOUSTIC PANEL CHICKEN FEATHER WASTE ENVIRONMENTALLY FRIENDLY

2020 ◽  
Author(s):  
Ansarullah ◽  
Ramli Rahim ◽  
Baharuddin Hamzah ◽  
Asniawaty Kusno ◽  
Muhammad Tayeb
Keyword(s):  
Animal Feed ◽  
Environmentally Friendly ◽  
Selling Price ◽  
Chicken Feather ◽  
Chicken Feathers ◽  
The Road ◽  
Feather Waste ◽  
Chicken Feather Waste ◽  
Almost All ◽  
The Impact

Chicken feathers are the result of waste from slaughterhouses and billions ofkilograms of waste produced by various kinds of poultry processing. This hal is a veryserious problem for the environment because it causes the impact of pollution. Hasmany utilization of chicken feather waste such as making komocen, accessories,upholstery materials, making brackets to the manufacture of animal feed but from theresults of this activity cannot reduce the production of chicken feathers that hiscontinuously increase every year. This is due to the fact that the selling price of chickenmeat has been reached by consumers with middle to upper economic levels. This caneasily be a chicken menu in almost all restaurants and restaurants to the food stalls onthe side of the road. An alternative way of utilizing chicken feathers is to makecomposite materials in the form of panels. Recent studies have shown that the pvacmaterial can be utilized as a mixing and adhesive material with mashed or groundfeathered composites to form a panel that can later be used as an acoustic material.The test results show that the absorption of chicken feathers and pvac glue into panelscan absorb sound well with an absorption coefficient of 0.59, light. This result is veryeconomical so it is worth to be recommended as an acoustic material. Apart from theresults of research methods carried out is one of the environmentally friendly activitiesin particular the handling of waste problems

SISTEM PENDUKUNG KEPUTUSAN PRIORITAS LOKASI PERBAIKAN JALAN MENGGUNAKAN METODE AHP (ANALYICAL HIERARCHY PROCESS) DAN SAW (SIMPLE ADDITIVE WEIGHTING) STUDI KASUS KABUPATEN PASURUAN

Repositor ◽  
2020 ◽  
Vol 2 (9) ◽  
Author(s):  
Feny Aries Tanti ◽  
Galih Wasis Wicaksono ◽  
Agus Eko Minarno
Keyword(s):  
Analytical Hierarchy Process ◽  
Public Works ◽  
Economic Sectors ◽  
The Road ◽  
Regional Budget ◽  
Program Calculation ◽  
The Social ◽  
Alternative Position ◽  
Simple Additive Weighting ◽  
Hierarchy Process

AbstrakJalan merupakan prasarana yang ada di darat untuk sektor sosial dan ekonomi. Kesadaran pemerintah dalam memperbaiki jalan yang rusak merupakan hal utama dalam anggaran daerah. Peningkatan jumlah lokasi jalan berkaitan dengan peningkatan jumlah perbaikan jalan yang akan dilakukan. Penelitian ini bertujuan untuk menentukan lokasi perbaikan jalan yang terbaik. Jalan yang diperbaiki berdasarkan dari beberapa alternatif posisi lokasi perbaikan jalan. Cara menetapkan lokasi perbaikan jalan dengan memberikan posisi peringkat alternatif berdasarkan kriteria yang sudah ditetapkan. Berdasarkan pertimbangan kriteria dapat diukur secara kuantitatif dengan menggunakan metode AHP (Analytical Hierarchy Process) dan SAW (Simple Additive Weighting). Berdasarkan hasil pengujian terhadap program sudah dapat digunakan. Hasil dari perhitungan program sudah sesuai dengan hasil perhitungan yang sudah dilakukan. Pengujian dilakukan terhadap 10 responden. Dengan sistem ini diharapkan membantu pihak Pekerjaan Umum (PU) Bina Marga untuk menentukan lokasi perbaikan jalan secara lebih objektif. Kata Kunci: Analytical Hierarchy Process, Simple Additive Weighting, Sistem Pendukung KeputusanAbstractThe road is a land-based infrastructure for the social and economic sectors. Government awareness in repairing a broken road is a key thing in a regional budget. The increasing number of road locations relates to the increasing number of road repairs to be made. The research aims to determine the location of the best road repairs. The repaired path is based off several alternative position of road repair location. How to set the road repair location by providing an alternate ranking position based on the criteria already set. Based on consideration criteria can be measured quantitatively by using AHP (Analytical Hierarchy Process) and SAW (Simple Additive Weighting). Based on the test results of the program can be used. The results of the program calculation are already in accordance with the calculated results. Testing was conducted against 10 respondents. This system is expected to assist the Public Works (PU) of Bina Marga to determine the location of road repairs in a more objective. Keyword: Analytical Hierarchy Process, Simple Additive Weighting, Decision Support System

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