dc.description.abstract | Failure of pavement surface reduces the speed of vehicles thereby decreasing service delivery of the road.
Most of the roads constructed in Ethiopia fail prematurely before serving the design life due to various
causes arising from many factors. One of these roads failed before reaching design life is 167.24 kms Arba
Minch-Sawla bitumen surface treatment link road. Although the road was constructed in 2017, it failed
within three years of its completion. It was constructed in three lots by three different contractors. Lot 1 is
from Shelle Junction to Balta which is 59.13 kms. Lot 2 is from Balta to Otolo which is 38.31 kms. Lot 3 is
from Otolo to Sawla, 50.68 kms. 19.12 km is asphalt concrete pavement from Arba Minch to Shelle junction
which is a part of Arba Minch-Jinka AC pavement and shared by Arba Minch-Sawla road. Currently,
vehicles moving to Arba Minch from Sawla prefer the gravel road from Sawla to Wolaita Sodo which is
140 kms and then take the asphalt pavement to Arba Minch which is 110 kms which is 250 kms totally. The
difference is 82.76 kms. The research is aimed at identifying the types of distresses with their severity and
extents, their causes, forwarding suitable maintenance types and carrying out LCCA for its maintenance.
The research is applied, explanatory as well as qualitative and was carried out by doing desk review and
gathering the necessary data. Pavement condition survey was carried out to find the most distressed places
in the span of the road. Distress types were identified and quantified with their severity and extent by
videotaping the whole span of the road. The dominating distresses were found to be rutting, potholes and
raveling associated with side slope and drainage failure. Aggregate samples for laboratory tests were
collected from most distressed areas by purposive sampling method. Five test pits were selected at stations
21+990, 51+400, 74+490, 150+220 and 159+940 respectively from Arba Minch. Tests of CBR and
Atterberg limits were carried out for base course, sub base aggregates and subgrade materials. Tests for
ACV and water absorption were carried out for base course aggregates. Gradation analysis was carried
out for base course and sub base aggregates. Free swell tests were carried out for subgrade aggregates.
All testes were carried out as per their respective AASHTO and ASTM standards. Bitumen extraction,
soundness test, water absorption, apparent specific gravity and strip test for bitumen affinity of the
extracted aggregates was carried out. Traffic data was gathered at five stations and results showed that
distresses are not due to traffic load. The causes of these distresses were analyzed and found to be due to
poor quality base course aggregates, side slope and drainage failures, expansive subgrade soil and poor
design and construction. Test results showed base course aggregates CBR is below the standard. The
gradation result showed base course and sub base aggregate tends to be coarser while that of the sub grade
material is finer when evaluated with ERA grading envelope. The free swell of the capping layer and sub
grade materials result show high value which shows the subgrade materials are very expansive and not
good enough for road construction. The PI of all the layers was found to be as per the standard. Bitumen
extraction showed that bitumen content is as per the standard. Bitumen affinity towards aggregate
highlighted that the bitumen type is good for cold weather roads. Soundness test results are acceptable. It
is concluded that subgrade failures are due to expansive subgrade soil, poor drainage, weak base course
material and moisture; pavement materials particularly aggregates are substandard. Drainage failures,
which resulted in raveling and potholes, are due to slope failures. It is recommended that base course
materials should meet the CBR and water absorption standards and future road design and construction
shall avoid subgrade with high swell. The suitable treatment method for each distress type was
accompanied with the life cycle cost analysis for eighteen years of the road. Four comparative alternative
maintenance options were worked out with corrective maintenance, bitumen single surface treatment,
bitumen double surface treatment, slurry seal and microsurfacing every two and three years and double
surface asphalt patching every six years was proposed to enable the road function for the coming 18 years. | en_US |
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Arbaminch University Research Database System ` Arba Minch University Research Database systems. Contains four subsystems you can choose below. AMU research Project information management system. This is a system that helps to manage the project flow of AMU ... Dataset Repository. Open system. GIS. Geographic Information System.
thesis guidelines for graduate studies arba minch university school of graduate studies 2015 arba minch task force members antoarkato (phd) chairperson member. Skip to document ... Thesis Full name of the author typed in the middle of the page Name and location of the University Month and year of thesis submission typed 5 cm above the bottom ...
Find 1386 researchers and browse 1 departments, publications, full-texts, contact details and general information related to Arba Minch University | Arba Minch, Ethiopia |
Executive Research Directorate. Director: - Tesfaye Habtemariam. Email: - [email protected]. Phone: - +251920526541. The official website of Arba Minch University. Arba Minch University is a national university in Arba Minch, SNNPR, Ethiopia. It is approximately 435 kilometres.
Any alleged research misconduct will be considered a serious offense by the university and researchers are also required to declare their conflicts of interest. The official website of Arba Minch University. Arba Minch University is a national university in Arba Minch, SNNPR, Ethiopia. It is approximately 435 kilometres.
among Arbaminch University students. Methods: A cross sectional institution based study was conducted in Arba Minch University from March 24-28/ 2013. Four hundred twenty eight students participated in the study. The total sample size was proportionally allocated to the six colleges based on the number of regular undergraduate students.
Therefore, the aim of this study was to assess prevalence and associated factors of anxiety among Arba Minch university undergraduate students. Objectives: To assess prevalence and associated factors of anxiety among Arba Minch university undergraduate students. Methods: A cross-sectional study was conducted in Arbaminch University on April 22 ...
of Arba Minch town and local peoples. Due to the above problems, this research will be conducted in order to fill the gap to assess the costs and benefits of Nech sar national park on the development of Arba Minch Town, impacts of the park for the livelihood of peoples live in Arba Minch or/and nearest to the park. 1.3.
Objective:This study aimed to assess life satisfaction and its relationship with risky behavior among Arbaminch University students. Methods: A cross sectional institution based study was conducted in Arba Minch University from March 24-28/ 2013. Four hundred twenty eight students participated in the study.
a thesis submitted to department of biology, college of natural and comutational sciences, school of graduate studies, arba minch university in partial fulfillment of the requirements for degree of master of science in biotechnology principal advisor: ashenafi hailu (phd) co-advisors: endalkachew woldemeskel (phd) ...
The institute started its operation with short-term trainings, 2-years diploma, 3-years advanced diploma and 5-years degree programs. In 1997, AWTI was restructured as Arba Minch Technology Institute and added degree programs in Civil, Electrical, and Mechanical Engineering. Diploma program in Meteorology was also launched in 2001.
Yilma Demissie - Arba Minch University, School of Graduate Studies P.O.B. 21., Arba Minch, Ethiopia Feleke Gerb - Arba Minch University, Ethiopia Tadesse Taye Meskele - Arba Minch University, School of Graduate Studies P.O.Box 21, Arba Minch, Ethiopia. E-mail: [email protected], 2 Katholieke Universiteit Leuven Hydraulic Section ...
Welcome to the official website of Arba Minch University, a prestigious national institution located in the vibrant South Ethiopia, in the city of Arba Minch.
The study revealed rapid urbanization mainly induced by migration. Physically, Arba Minch has grown from fragmented neighborhoods (since 1950s to mid 1970s) to a conurbated urban fabric in recent ...
Jimma University Open access Institutional Repository ... Predictors of poor tuberculosis treatment outcome at arba minch general hospital, southern Ethiopia: a casecontrol study ... en_US: dc.type: Thesis: en_US Files in this item. Name: thesissss debalke ... Size: 1.141Mb. Format: PDF. View/ Open. This item appears in the following ...
Arbaminch University Thesis Guideline - Free download as Word Doc (.doc / .docx), PDF File (.pdf), Text File (.txt) or read online for free. Thesis Report Guidlines
Abstract The objective of this study was to explore the driving forces of urbanization, land use pattern, and its challenges in Arba Minch town, Southern Ethiopia. Mixed research design was employed to generate and analyze data. Four sample kebeles [Mehal Ketema, Dilfana, Bere and Woze] were selected using simple random sampling technique.
The work is dedicated to the determination of the origin of archaeological finds from medieval glass using the method of neutron activation analysis (NAA). Among such objects we can discover not only things produced in ancient Russian glassmaking workshops but also imported from Byzantium. The authors substantiate the ancient Russian origin of the medieval glass bracelets of pre-Mongol period ...
Jimma University Open access Institutional Repository Psychoactive substance abuse and intention to stop among arba-minch university students, arba-minch town, south Ethiopia
The Joint Institute for Nuclear Research was established on the basis of an agreement signed on 26 March 1956, in Moscow by representatives of the governments of the eleven founding countries, with a view to combining their scientific and material potential. The USSR contributed 50 percent, the People's Republic of China 20 percent.
Dubna. Dubna is a green and pleasant city which has become a "Science City", due to the location of the Joint Institute for Nuclear Research here. It is situated at the beginning of the Moscow Canal, which is watched over by a gigantic Lenin statue - the second biggest in the world. The city can easily be visited on a day trip from Moscow.
Lot 3 is from Otolo to Sawla, 50.68 kms. 19.12 km is asphalt concrete pavement from Arba Minch to Shelle junction which is a part of Arba Minch-Jinka AC pavement and shared by Arba Minch-Sawla road. Currently, vehicles moving to Arba Minch from Sawla prefer the gravel road from Sawla to Wolaita Sodo which is 140 kms and then take the asphalt ...
The Joint Institute for Nuclear Research is an international intergovernmental scientific research organization established through the Convention signed on 26 March 1956 by eleven founding States and registered with the United Nations on 1 February 1957. JINR is situated in Dubna city, the Moscow Region, the Russian Federation.