PRIMARY CAUSES OF ROAD PAVEMENT FAILURE AND POSSIBLE SOLUTION


PRIMARY CAUSES OF ROAD PAVEMENT FAILURE AND POSSIBLE SOLUTION

ABSTRACT

This project investigates the primary causes of Road Pavement Failure and Possible Solution (a case study of Iree-Ibokun road). Various tests are carried out on soil samples colleted from failed areas of the road such as CBR test, sieve analysis test, liquid limit, Plastic limit test, Plastic index test and compaction test. The foundation failures of the road pavement observed are caused by excess ground water penetrated into the base and sub-base courses and geotechnical properties of the soil were also responsible for the failure of the road pavement such as: inadequate compaction, water infiltration through edge break, lack of adequate drainage and unsuitable soil. From location A,B and C the results of sieve analysis ranges from liquid limit (LL) is 51-20% Plastic limit (PL) is 31.11% and plastic index is 20.89% respectively, CBR of the sample ranges from 24%, - 26% respectively. The values are not meet the requirement of sub-base and base courses which suppose to have not less than 80% respectively. To obtain optimum performance of the road, the causes identified above should be corrected 

TABLE OF CONTENT 

Title page i

Certification ii

Dedication iii

Acknowledgement iv

Abstract v

Table of content vi

CHAPTER ONE

1.0 Introduction 1

1.1The scope of study2

1.2 Aims and objectives of the study 3

1.3 Limitation of the study 3

CHAPTER TWO

2.0 Literature review 4

2.1 The Sub-grade 5-6

2.1.2 Base Course 6

2.1.3Sub-base course6

2.3 Function of base and sub-base courses in pavement 6-7

2.4 Water 7

2.4.1 Ways water gets to sub-grade or base and sub-base course 8

2.4.2 Modes of occurrence water in soil 8

2.5 Estimating the sub-grade moisture content 9

2.6 Soil problems in road pavement failure 9

2.7 Study of different failure in foundation pavement 10

2.7.1 Typical common foundation failure in Osun State 11

2 .8 Consolidation 12

2.9 Edge crack 12

2.10 Longitudinal 13

2.11 Porthole 13

2.12 Shear Failure 12

2.13. Possible solution to primary ca uses of road pavement failure 13 

CHAPTER THREE 

3. Methodology    14

3.1 Methodology for Data collection 14

3.2 Sieve Analysis Test 14

3.3 Plastic Limit Test 14

3.4 California Bearing Ratio CBR 15

3.5 Compaction Stage 16

3.6 Load Penetration Stage 17

3.7 Atterberg Limit Test 17

3.8 Compaction of Soil 19

3.9 Grains Analysis 21

CHAPTER FOUR

4.0 Data Presentation and Analysis 23

4.1 Result 23

CHAPTER FIVE 

5.0 Conclusion and Recommendations 46

5.1 Conclusion 46

5.2 Recommendation 46

References

CHAPTER ONE

1.0 INTRODUCTION 

Road pavement construction has experienced many significant problems mainly in sub-base and base design and construction over the years in this country (Nigeria).

Roads in Osun State have a very high volume of traffic which comprises of many type of commercial vehicles, cars and trucks. Roads have been constructed for more than 2000years. Even the earliest engineers practiced drainage of the pavement’s sub-surface layers in order to keep the highway functioning. Nowadays, many billions of Naira are spent on road construction and maintenance each year, and road transport in the primary method of mobility for Nigeria people or goods, Transport constitutes about 10% of the gross national product of the Nigerian union and more than 80% of the total transport of people and goods is provided y the infrastructure. Investment in road construction and maintenance in Nigeria is therefore at a very high level and any improvement can have a significant effect on the Nigeria economy. Not only will well maintained roads and highway contribute economically, for they are also essential for social development of Nigeria. On the other, the deterioration of roads can have serious consequence for the safety and comfort of roads user.

In many countries premature break-down especially of low volume asphalt roads, is an accelerating problem increasing traffic and traffic roads demand higher performance levels from pavement if premature rutting and cracking is to be avoided. At the same time climate change means that highway are likely to be exposed to more rain and to greater thermally induced cracking that can lead the run-off into the structure. Once in the pavement or embankment, plays a primary role in giving shorter service life and in increasing the needs of rehabilitation measures. A further problem that is becoming of more and more concern 1is the possibility that the road is a source of contaminants that are having an undesirable effect on the hydro1ological environment. Two sources are possible.

(i) Contaminant in runoff from rainwater or snowmelt that flows over the top `of the pavement and than soaks into the ground.

(ii) Leaching of contaminant from the roads construction materials and earthworks.

             According to E.J Yoder and M. w Witczak (1975), the foundation of the roads which comprises of both sub-base and base courses should be well compacted and to make them free from water. Most design techniques strength test made on sub-grade samples that is in soaked or nearly saturated condition. This has been saturated practice for many years since it is assumed that the saturated case is the controlling one. On the other hand, it is known that even under certain desert condition water accumulate in sub-base and base course under a pavement and the moisture content of the soil can become high.

The in – place moisture content or ground water in sub-base and base course under flexible pavement is influenced by amount of rainfall and high-rise of water table.

In roads, two type of pavement are considered for use in roads construction.

I. Rigid pavements 

II. Flexible pavements

A flexible pavement : As defined by AASHO is a pavement structure which distributes loads to the sub- grade that is, the foundation of the roads and this relies on the bituminous aggregate  interlock, particle friction and collation for stability, the strength of the supporting foundation, the quality materials and the construction procedure.

Rigid pavement: it can be as a pavement structure which distributes loads evenly to the sub- grade i. e foundation having one course, a Portland cement concrete slab of relatively high binding resistance. The foundation of the roads which comprises of the structure of a concrete pavement slab should be designed for the loads, in order to render year of service. The factors below should be considered

1. The amount, type and weight of present anticipated traffics

2.        The depth o ground water should be considered.

3.        The strength and quality of concrete to be used.

4.        Supporting power and character of the sub- grade.

5.        The climate of the region (Osun State) in which the pavement is to construct. 

Also for a road to be constructed for this purpose, certain criteria have to be considered.

I. Traffic density and the vehicle pattern.

II. The economic importance of the roads.

III. Topography of the area.

IV. Weather duration.

1.1 SCOPE OF THE STUDY

The study focus on various source by which base and sub- base cause of road pavement get in contact with water and proffer solution to curtail the ingress of water in to the road pavement structure so that the road pavement structure at Iree – Ibokun in Osun state as a case study well serve beneficial community up to the expected optional level.

1.2 AIMS AND OBJECTIVE

The primary aim of the project is to investigate the primary cause of roads pavement failure on the structural stability of sub- base and base course of typical flexible pavement at Iree- Ibokun road in Osun state.

The primary objectives of the project are basically on 

I. To identify, investigate and control contaminants leaching from soils natural aggregate and by- productivity and moisture condition.  

II. To examine the geotechnical properties of the materials 

2.2.1 LIMITATION OF THE STUDY

The limitation to this research work is due to.

1. Economic situation of the country which lead to inadequate finance.  

2. Time there is limitation period of time to carry out the project.

.

PRIMARY CAUSES OF ROAD PAVEMENT FAILURE AND POSSIBLE SOLUTION



TYPE IN YOUR TOPIC AND CLICK SEARCH.






RESEARCHWAP.ORG

Researchwap.org is an online repository for free project topics and research materials, articles and custom writing of research works. We’re an online resource centre that provides a vast database for students to access numerous research project topics and materials. Researchwap.org guides and assist Postgraduate, Undergraduate and Final Year Students with well researched and quality project topics, topic ideas, research guides and project materials. We’re reliable and trustworthy, and we really understand what is called “time factor”, that is why we’ve simplified the process so that students can get their research projects ready on time. Our platform provides more educational services, such as hiring a writer, research analysis, and software for computer science research and we also seriously adhere to a timely delivery.

TESTIMONIES FROM OUR CLIENTS


Please feel free to carefully review some written and captured responses from our satisfied clients.

  • "Exceptionally outstanding. Highly recommend for all who wish to have effective and excellent project defence. Easily Accessable, Affordable, Effective and effective."

    Debby Henry George, Massachusetts Institute of Technology (MIT), Cambridge, USA.
  • "I saw this website on facebook page and I did not even bother since I was in a hurry to complete my project. But I am totally amazed that when I visited the website and saw the topic I was looking for and I decided to give a try and now I have received it within an hour after ordering the material. Am grateful guys!"

    Hilary Yusuf, United States International University Africa, Nairobi, Kenya.
  • "Researchwap.org is a website I recommend to all student and researchers within and outside the country. The web owners are doing great job and I appreciate them for that. Once again, thank you very much "researchwap.org" and God bless you and your business! ."

    Debby Henry George, Massachusetts Institute of Technology (MIT), Cambridge, USA.
  • "Great User Experience, Nice flows and Superb functionalities.The app is indeed a great tech innovation for greasing the wheels of final year, research and other pedagogical related project works. A trial would definitely convince you."

    Lamilare Valentine, Kwame Nkrumah University, Kumasi, Ghana.
  • "I love what you guys are doing, your material guided me well through my research. Thank you for helping me achieve academic success."

    Sampson, University of Nigeria, Nsukka.
  • "researchwap.com is God-sent! I got good grades in my seminar and project with the help of your service, thank you soooooo much."

    Cynthia, Akwa Ibom State University .
  • "Sorry, it was in my spam folder all along, I should have looked it up properly first. Please keep up the good work, your team is quite commited. Am grateful...I will certainly refer my friends too."

    Elizabeth, Obafemi Awolowo University
  • "Am happy the defense went well, thanks to your articles. I may not be able to express how grateful I am for all your assistance, but on my honour, I owe you guys a good number of referrals. Thank you once again."

    Ali Olanrewaju, Lagos State University.
  • "My Dear Researchwap, initially I never believed one can actually do honest business transactions with Nigerians online until i stumbled into your website. You have broken a new legacy of record as far as am concerned. Keep up the good work!"

    Willie Ekereobong, University of Port Harcourt.
  • "WOW, SO IT'S TRUE??!! I can't believe I got this quality work for just 3k...I thought it was scam ooo. I wouldn't mind if it goes for over 5k, its worth it. Thank you!"

    Theressa, Igbinedion University.
  • "I did not see my project topic on your website so I decided to call your customer care number, the attention I got was epic! I got help from the beginning to the end of my project in just 3 days, they even taught me how to defend my project and I got a 'B' at the end. Thank you so much researchwap.com, infact, I owe my graduating well today to you guys...."

    Joseph, Abia state Polytechnic.
  • "My friend told me about ResearchWap website, I doubted her until I saw her receive her full project in less than 15 miniutes, I tried mine too and got it same, right now, am telling everyone in my school about researchwap.com, no one has to suffer any more writing their project. Thank you for making life easy for me and my fellow students... Keep up the good work"

    Christiana, Landmark University .
  • "I wish I knew you guys when I wrote my first degree project, it took so much time and effort then. Now, with just a click of a button, I got my complete project in less than 15 minutes. You guys are too amazing!."

    Musa, Federal University of Technology Minna
  • "I was scared at first when I saw your website but I decided to risk my last 3k and surprisingly I got my complete project in my email box instantly. This is so nice!!!."

    Ali Obafemi, Ibrahim Badamasi Babangida University, Niger State.
  • To contribute to our success story, send us a feedback or please kindly call 2348037664978.
    Then your comment and contact will be published here also with your consent.

    Thank you for choosing researchwap.com.