Stabilization of Local Expansive Subgrade Soil using Marble waste powder with Lime

Inhaltsverzeichnis (Table of Contents)

• INTRODUCTION
  • Background
  • Problem statement
  • Objective
  • Justification
  • Scope of the work
  • Methodology of the report
  • Organization of the report
• LITERATURE REVIEW
  • Distribution of expansive soil
    • Worldwide distribution of expansive soil
    • Distribution of expansive soil in Ethiopia
  • Mineralogical composition of expansive soils
  • Identification
    • Field identification
    • Laboratory identification
  • Damaging effect of expansive sub-grade soils
  • Mitigating the effect of expansive sub-grade soils
    • Soil replacement
    • Surcharge loading
    • Pre-wetting
    • Moisture control
    • Compaction control
    • Grouting
    • Mechanical stabilization
    • Chemical stabilization

Zielsetzung und Themenschwerpunkte (Objectives and Key Themes)

This thesis investigates the effectiveness of using marble waste powder mixed with lime to stabilize expansive sub-grade soil. The research aims to determine the optimal proportions of these materials to achieve desired geotechnical properties for construction purposes.

• The impact of expansive soil on civil infrastructure
• Stabilization techniques for expansive soils
• The effectiveness of marble waste powder and lime as stabilizers
• The determination of optimal mixing proportions
• The evaluation of the stabilized soil's geotechnical properties

Zusammenfassung der Kapitel (Chapter Summaries)

The introductory chapter establishes the background of expansive soils, outlines the problem statement, and defines the research objectives. It emphasizes the importance of this study in addressing the challenges posed by expansive soils in construction.

The literature review chapter provides a comprehensive overview of the distribution, mineralogical composition, identification methods, and damaging effects of expansive soils. It also explores various mitigation techniques, including soil replacement, surcharge loading, pre-wetting, moisture control, compaction control, grouting, mechanical stabilization, and chemical stabilization.

Schlüsselwörter (Keywords)

Expansive soil, sub-grade soil, stabilization, marble waste powder, lime, geotechnical properties, California Bearing Ratio (CBR), unconfined compressive strength (UCS), optimum moisture content (OMC), maximum dry density (MDD), plasticity index (PI), liquid limit (LL), free swell index (FS).