International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 10 Issue: 07 | July 2023
p-ISSN: 2395-0072
www.irjet.net
STABILIZATION OF EXPANSIVE SOIL USING WATER HYACINTH ASH Vishnu K1, Akshay Haridas2, Amrutha Raj2, Aparna I2, Shamil Shajahan2 1Assistat Professor, St. Thomas college Of Engineering & Technology, Chengannur, Kerala, India
2U.G Student, Dept. of Civil Engineering, St. Thomas college Of Engineering & Technology, Chengannur, Kerala,
India ---------------------------------------------------------------------***--------------------------------------------------------------------1.1 SOIL IN KUTTANADU Abstract - Strength of soil is an important criterion while constructing a structure over it. Expansive soils are soils that have low strength and bearing capacity. This project focuses on stabilizing the expansive soil in Kuttanad region. Weakness of soil in this region is hazardous to both the agricultural and domestic life of people residing there. In this project the stabilization is done using an easily available and cost-effective material, water hyacinth ash. Water hyacinth, being a threat to the water bodies, is made to ash and used to treat the soil to increase its stability. The soil will be treated using WHA (0.25%,0.5%,0.75%,1%,1.25% & 1.5%). Optimum percentage of WHA will be determined by comparing the result of UCC test. To determine the effect of curing on the material tests will be conducted on soil treated with optimum percentage of WHA after curing it for 3&7 days.
Expansive soils can shrink, swell, and change in volume due to moisture variations. They contain clay minerals like smectite or vermiculite that absorb water and expand when wet, leading to structural heaving. Conversely, when they dry out, they contract, causing differential settlement. These soils are weak and have significant engineering drawbacks, necessitating soil treatment prior to construction. In the Kuttanad region, the main issue caused by expansive soil is bund breaching, resulting in agricultural losses and flooding.
1.2 Soil stabilization Soil stabilization transforms soil properties for longterm strength gains. It involves increasing shear strength and bearing capacity, forming a solid monolith that reduces permeability, shrink/swell potential, and freeze/thaw damage. Expansive soils can expand by up to 10%, causing significant structural harm. Stabilization eliminates the need for costly removal and replacement by improving soil in situ. Chemical methods, such as lime or Portland cement, form permanent bonds between soil particles. Pre-project testing ensures sufficient material for permanent floor stabilization. Various materials are used for soil stabilization.
Key Words: Water Hyacinth Ash, stabilization, economic material, Kuttanad, Optimum moisture content
1.INTRODUCTION Construction is a necessary activity in today's world, but suitable land for construction is limited. Soil plays a crucial role in determining the feasibility of building structures in a particular area. Some natural soil deposits are suitable for construction, while others require treatment due to their problematic nature. Soil stabilization is the process of improving soil properties to make it capable of sustaining the loads imposed by structures. This field has seen continuous development and changes over time, with a growing emphasis on environmental sustainability.
2. METHODOLOGY 2.1 General
To achieve sustainable soil stabilization, recycled materials have been introduced. Construction and demolition waste, as well as broken brick powder, are being reused for stabilization purposes. Additionally, plastic waste, which poses significant environmental challenges, can be recycled and employed for soil stabilization, benefiting both soil properties and reducing plastic waste problems. Water hyacinth, an invasive weed causing transportation difficulties and disrupting aquatic ecosystems, can be converted into ash and utilized for stabilization, representing a new sustainable approach in soil stabilization
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MATERIAL COLLECTION
TESTING VIRGIN SOIL
RESULT ANALYSIS
TESTING TREATED SOIL
Fig 1: Flowchart illustrating methodology of the project The purpose of this study is to put forward a stabilization method for soil in kuttanad region. Here stabilization will
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