Which footing is best for black cotton soil?
The under-reamed pile foundation is the best for black cotton soil. It has bulbs at its lower end. If this bulb is given below the critical depth of moisture movement in black cotton soil, the foundation will be secured to the ground, and it would not move with movement (shrinkage and swelling) of soil.
What is chemical stabilization of soil?
Chemical stabilizers, also known as soil binders or soil palliatives, provide temporary soil stabilization. Vinyl, asphalt, or rubber are sprayed onto the surface of exposed soils to hold the soil in place and minimize erosion from runoff and wind.
What are the chemical admixtures used in soil stabilization?
In recent years, chemical admixtures such as cement, lime, fly ash shows promising aspects in stabilising erodible soil. These chemical stabilisers generally alter the mineralogy of soil resulting in highly stable soil substances having improved inherent properties such as strength and stiffness.
How is black cotton soil treated?
Of these, lime stabilization is one of the techniques which is in use for stabilizing black cotton soil from the past few decades. Use of lime reduces the high plasticity of black cotton and makes it workable. Also reaction between lime and soil makes the soil-lime mixture more strength resistant [1].
What is the another name of black soil?
regur
black soils known locally as regur.
What are the types of soil stabilization?
There are three broad types of soil stabilization: biological, physical and chemical.
- Biological soil stabilization:
- Physical soil stabilization:
- Chemical soil stabilization:
- GRT offers soil solutions for all types of soil stabilization issues:
What are the soil stabilization techniques?
Soil Stabilisation Techniques
- There are 3 main methods for soil stabilisation:
- Mechanical stabilisation. This category consists of physical processes such as compacting or tamping with machineries including rollers or rammers.
- Chemical Stabilisation.
- Polymer Stabilisation.
Is black soil good for construction?
Of India. Black cotton soil, a cohesive soil, is considered a problematic soil for civil engineers. It has characteristics of swelling during rains and shrinking during summer. In both the conditions, it poses problems.
How does lime stabilization work?
Lime stabilization uses pozzolans, which are naturally present in clay soils, to generate cementitious bonds that permanently strengthen a soil. Pozzolans such as silica and alumina react with calcium, supplied by the lime, and water to form calcium-silicate-hydrates (C-S-H) and calcium-aluminate-hydrates (C-A-H).
Where is black cotton soil found?
Black Cotton soils (expansive soils) are found extensively in Deccan and Maharashtra and Gujarat. These are found in variable thicknesses and are underlain by a sticky material.
Why is it necessary to stabilize black cotton soil?
Soil stabilization is the process which improves the engineering properties of the black cotton soil and thus making it more stable. Generally, when the soil available at site is not much suitable for the intended purpose, the soil stabilization is required.
How to stabilize black cotton using quarry dust?
Stabilization of Black Cotton Soil using Waste Material Quarry Dust Laboratory Test Symbol Resul ts Relevant IS Codes Liquid Limit WL 72.62 IS 2720 Part V Plastic Limit WP 26.54 IS 2720 Part V Plasticity Index PI 46.08 IS 2720 Part V
What kind of mineral is in black cotton soil?
There is a mineral generally known as montmorillonite which presents in black cotton soil and it is responsible for the behaviour of shrinkage and swelling of soil is subjected to water. This variation creates so many geo technical problems. In India there is about 20% soil is black cotton soil.
What is the UCS value of black cotton soil?
The peak UCS value of 1880kN/m2 was obtained for soil stabilized with 6% cement and 20% QD contents and 186% for CBR. Stabilized black cotton soil with 6% cement and20% QD results in savings of approximately 20% cost compared with the only cement stabilized soil.