The nature of soil is an ambiguous property unlike it is treated to know the basic engineering parameters. Usually, soil and soft soils cause difficulties in construction site when having low strength and low stiffness. To enhance the engineering property, soil needs to be stabilized. This study is an experimental base research where brick dust and cement are used to stabilize the soil to explore the more uses of raw materials like this as well as to improve the quality of soft soil at the proposed site of Manikdi, Dhaka.
The soil is classified as a clayey soil and determined the plastic limit, liquid limit, specific gravity, grain size. Secondly, to compare the strength and characteristics of existing soil before and after treating with the combination of brick dust and cement. We used two different mixed ratio and natural soil to conduct this experiment. From unconfined compression strength test of natural soil, soil with mix ratio (Cement: Brick Dust: Soil=1:1.5:7) and soil with mixed ratio (Cement: Brick Dust: Soil=1:2:7) were 483.7 kPa, 737.2 kPa and 967.8 kPa consequently. So, we found that the stress is increasing with increasing amount of cement and brick dust. From The grain size analysis, the Cu value of natural soil, soil with mix ratio (Cement: Brick Dust: Soil=1:1.5:7) and soil with mixed ratio (Cement: Brick Dust: Soil=1:2:7) were 4.3, 5.06 and 3.25 consequently. Also we found that the Cc value of natural soil, soil with mix ratio (Cement: Brick Dust: Soil=1:1.5:7) and soil with mixed ratio (Cement: Brick Dust: Soil=1:2:7) were 0.84, 0.879 and 0.83 consequently. So for this three cases the soil sample was poorly graded. From the Atterberg limit test the liquid limit for natural soil, soil with mix ratio (Cement: Brick Dust: Soil=1:1.5:7) and soil with mixed ratio (Cement: Brick Dust: Soil=1:2:7) were 36.07%, 34.63% and 33.17% consequently, the plastic limit were 24.81%, 22.09% and 21.08% consequently. So, we can say that the liquid limit and plastic limit is decreasing with increasing amount of cement and brick dust.
Table of Contents
CHAPTER I INTRODUCTION
1.1 Overview
1.2 Advantage of soil stabilization
1.3 Purpose of the Work
1.4 Objectives of the study
1.5 Scope of the study
1.6 Thesis layout
CHAPTER II LITERATURE REVIEW
2.1 General
2.2 Related Work
2.3 Atterberg Limits
2.4 Specific gravity of soil
2.3 Unconfined compression Strength
CHAPTER III METHODOLOGY
3.1 Geology of the Site
3.1.1 Soft Soil
3.1.2 Brick Dust and Cement
3.2 Sample Preparation
3.3 Laboratory test conducted in the laboraty
3.4 Grain size analysis
3.5 Determination of Specific Gravity of Soil
3.6 Unconfined Compression test of Soil Sample
CHAPTER IV RESULTS AND DISCUSSION
4.1 General
4.2 Grain size analysis
4.3 Atterberg Limits
4.4 Specific gravity of soil
4.5 Unconfined compression Strength
CHAPTER V RESULTS AND DISCUSSION
2.1 General
2.2 Conclusion
2.3 Recommendation for future study
Research Objectives and Key Topics
This research aims to evaluate the effectiveness of using brick dust and cement as stabilizing agents for soft clayey soil collected from Manikdi, Dhaka. The study focuses on determining whether the addition of these materials in specific mix proportions improves the soil's engineering performance, particularly its strength, plasticity, and specific gravity characteristics.
- Evaluation of cement and brick dust as soil stabilization agents.
- Experimental analysis of soil properties including Atterberg limits and specific gravity.
- Investigation of soil strength enhancement via unconfined compression testing.
- Comparative study of natural soil versus mixed soil samples (Cement: Brick Dust: Soil).
- Development of geotechnical data for potential site construction improvements.
Excerpt from the Thesis
3.6 Unconfined Compression test of Soil Sample
Unconfined compressive strength tests were conducted for determining the unconfined shearing strength and axial stress following the ASTM methods. Soft soil usually have the lower compressive strength and a lower shearing stress is the result because the axial stress decreases with the increase amount of continuous static load confined by the soil body [Lab manual, 2019].
The unconfined compression test is widely used for a quick economical means of obtaining approximate shear strength of cohesive soil [Lab manual, 2019].
The shear strength of cohesive soil is made up of two of two components; primary one named cohesion which is derived from inter-particle attraction and secondary one name friction which frictional properties between particles (as in case of cohesion less soil).
As no lateral pressure is employed in the unconfined compression test, it has several features:
1. It is the simplest and quickest laboratory test method commonly used to measure the shear strength of cohesive soil.
2. It is used only on cohesive soils since a cohesion less soil will not from an unsupported cylinder at its unconfined state.
3. It is a measure of in-situ (in-place) strength
Summary of Chapters
CHAPTER I INTRODUCTION: Provides the research background, defines soil stabilization, states the research objectives, and outlines the thesis structure.
CHAPTER II LITERATURE REVIEW: Summarizes previous research regarding soil stabilization techniques using various additives and discusses the relevance of Atterberg limits and strength testing.
CHAPTER III METHODOLOGY: Details the collection of soil samples from the study site, the preparation of mixed soil specimens, and the laboratory procedures followed.
CHAPTER IV RESULTS AND DISCUSSION: Presents the raw data and experimental analysis of grain size, Atterberg limits, specific gravity, and unconfined compression test results.
CHAPTER V RESULTS AND DISCUSSION: Concludes the investigation by summarizing the findings on soil behavior after treatment and offers recommendations for future research.
Keywords
Soil Stabilization, Brick Dust, Cement, Unconfined Compression Strength, Atterberg Limits, Clayey Soil, Geotechnical Properties, Sieve Analysis, Specific Gravity, Construction Materials, Cohesive Soil, Soil Improvement, Compressive Stress, Plasticity Index.
Frequently Asked Questions
What is the fundamental focus of this research?
The research investigates the geotechnical improvement of soft clayey soil by using a mixture of cement and brick dust as stabilizing additives.
What are the primary thematic areas covered?
The study covers soil classification, stabilization mechanisms, laboratory testing methodology, and comparative analysis of physical and mechanical soil properties.
What is the central research question?
The study seeks to determine if adding specific ratios of cement and brick dust can enhance the strength and durability of soft soil for construction purposes.
Which scientific methods are applied in the study?
The researchers utilized standard geotechnical laboratory tests, including grain size analysis (sieve analysis), Atterberg limits tests, specific gravity measurements, and unconfined compression strength tests.
What is addressed in the main part of the report?
The main part focuses on the experimental procedure, the collection of data on treated vs. untreated soil, and the graphical representation of stress-strain curves.
Which keywords characterize this thesis?
Key terms include soil stabilization, brick dust, cement, unconfined compression strength, and geotechnical engineering.
How do the specific mix ratios affect the soil?
The experimental data shows that stress increases with higher amounts of cement and brick dust, indicating improved load-bearing capacity compared to natural soil.
What conclusions did the author reach regarding the soil grading?
Based on the calculated uniformity coefficient (Cu) and coefficient of curvature (Cc), the author concluded that the soil samples tested were poorly graded.
- Arbeit zitieren
- Nimur Rahaman Durjoy (Autor:in), 2019, New Ways of Dealing With Soil in Constructions? Soil Stabilization Using Brick, Dust and Cement, München, GRIN Verlag, https://www.grin.com/document/922181
