0704-883-0675     |      dataprojectng@gmail.com

IMPROVEMENT OF BEARING CAPACITY OF LATERITIC SOIL FOR PAVEMENT SUBGRADE BY ADDITION OF ROCK FLOUR

  • Project Research
  • 1-5 Chapters
  • Abstract : Available
  • Table of Content: Available
  • Reference Style: APA
  • Recommended for : Student Researchers
  • NGN 5000

ABSTRACT

This study evaluated the improvement of bearing capacity of lateritic soil for pavement subgrade by addition of rock flour stabilized with 0 - 12% rock flour by dry weight of soil at incremental rate of 3% and compacted using British Standard Light (BSL), West Africa Standard (WAS) and British Standard Heavy (BSH) compactive efforts. Results show that the lateritic soil sample used for this study is classified as A-7-6 according to American Association of State Highway and Transportation Officials (AASHTO). The formulated mixtures from the A-7-6 soil and rock flour showed an improvement in the index properties of the mixtures with increasing rock flour. The Liquid limit and Plasticity index reduced from 42 - 32% and 29.30 - 13.48% respectively as rock flour increased from 0 – 12%, while plasticity index of A-7-6 soil with rock flour showed considerable reduction in plasticity indices of mixtures with increasing content rock flour content. 1.802, 1.820 and 1.870g/cm³ were obtained as MDD values and 12.40, 11.90 and 11.60% as OMC values for the natural soil using BSL, WAS and BSH compaction efforts respectively. Highest set of values were obtained at 9% addition of rock flour. BSH gave the highest UCS value of 250.89kN/m², while BSL and WAS gave 180.8 and 218.12kN/m² respectively. Generally, a progressive improvement in soaked and unsoaked CBR values were observed for the stabilized specimen with increasing rock flour content. The least CBR value for soaked and unsoaked conditions were observed at 3 % addition of rock flour. For soaked condition at 3% addition of rock flour, the soaked CBR values obtained for BSL, WAS and BSH were 21.15, 25.93 and 28.21% respectively, while 37.88, 41.74 and 42.73% were obtained for unsoaked CBR in the same other of energy level adopted. In terms of consistency limits, the mixtures did not achieve the required threshold values for subgrade specified as LL < 35 and PI < 12% in local codes suggesting the use of higher rock flour contents to enhance these parameters. As regards to soaked and unsoaked CBR, results from the three energy levels adopted that is; BSL, WAS and BSH, meets the minimum requirements of 10% for flexible pavement subgrade according to NGS, (1997). To optimize their structural strength for subgrade application, the mixtures should be compacted to 100% of the relative densities.





Related Project Materials

DOMESTIC TERRORISM AND NIGERIA'S FOREIGN POLICY: A CASE STUDY OF BOKO HARAM 2009-2021

Background Of The Study

Since Nigeria's independence on October 1, 1960, Africa has unquestionably...

Read more
An evaluation of the role of sports in promoting national unity among secondary school students in Bauchi Local Government Area, Bauchi State.

Background of the Study

Sports have long served as a unifying force in diverse societies, acting as a medium for bridging ethnic, cultura...

Read more
ANTIBIOGRAM AND MICROBIAL CARRIAGE OF CAMPUS SHUTTLE DOOR HANDLES (A STUDY OF FEDERAL UNIVERSITY OF TECHNOLOGY, AKURE.)

ABSTRACT

The transmission of infection via fomites constitutes a major threat to public health especially in the develop...

Read more
Evaluating the Impact of Foreign Direct Investment on Nigeria’s Stock Market Performance

Background of the Study
Foreign Direct Investment (FDI) is widely regarded as a key engine for economic transformation, pa...

Read more
The effect of state policing on citizens' human rights in Maiduguri, Borno State.

Background of the Study:
State policing is a concept where law enforcement powers are decentralized, often placing signific...

Read more
An Assessment of the Role of Inter-Ethnic Relations in Political Development in Pankshin LGA, Plateau State: A Case Study of Peacebuilding Initiatives

Chapter One: Introduction

1.1 Background of the Study...

Read more
An investigation into factors influencing vaccine hesitancy among parents in Borno State

Background of the Study
Vaccine hesitancy, defined as the delay in acceptance or refusal of vaccines despite availability,...

Read more
The impact of science exhibitions on student interest in STEM in Ajaokuta LGA, Kogi State

Background of the Study 
Science exhibitions have long been recognized as dynamic platforms that showcase scientific i...

Read more
ASSESSING THE IMPACT OF EARLY CHILDHOOD MEDITATION PROGRAMS ON CONCENTRATION LEVELS

 ABSTRACT: Assessing the impact of early childhood meditation program...

Read more
A Critical Analysis of IT Budgeting and Cost Management Strategies: A Case Study of Financial Institutions in Zamfara State

Background of the Study

Effective IT budgeting and cost management are essential for financial institutions to optimize...

Read more
Share this page with your friends




whatsapp