How black cotton soil is stabilized?
How black cotton soil is stabilized?
Stabilization occurs when lime is added to black cotton soil and a pozzolanic reaction takes place. The hydrated lime reacts with the clay particles and permanently transforms them into a strong cementitious matrix.
Why rice husk ash is used in concrete?
Rice husk ash as a pozzolanic reactive material can be used to improve surface area of transition zone between the microscopic structure of cement paste and aggregate in the high-performance concrete.
Which type of stabilization will be the best for black cotton soil?
Lime Stabilization of Black Cotton Soil Black cotton soil is mixed with lime in varying proportions of 2%, 4%, and 6%. The lime-mixed soil is then cured for a duration of 3 days. The mixture is then oven-dried for 24 hours.
Can rice husk be used in concrete?
Research has demonstrated that heating rice husk at a temperature of 700°C makes a powder that has a sufficient structure for pozzolanic materials. Research has also indicated that, because of RHA’s high surface area, the Rice Husk Ash can be used in concrete as a mineral admixture.
Why is cement used for stabilization of soil?
Cement stabilisation can provide cohesion in a low cohesion soil (thus enhancing strength and durability) or reduce the effective clay content of a very high clay soil (Middleton, 1987), and can also be used to reduce linear shrinkage and water absorption (Keable, 1996).
How can we increase the bearing capacity of black cotton soil?
TECHNIQUES USED FOR IMPROVING BEARING CAPACITY OF SOIL
- Increasing depth of foundation.
- Draining the soil.
- Compacting the soil.
- Confining the soil.
- Replacing the poor soil.
- Using grouting material.
- Stabilizing the soil with chemicals.
Can rice husk ash replace cement?
Recently there are considerable efforts worldwide of utilizing indigenous and waste, materials in concrete. One of such materials is the rice husk which under controlled burning, and if sufficiently ground, the ash that is produced can be used as a cement replacement material in concrete.
What are the properties of rice husk ash?
RHA is grayish-black in color due to unburned carbon. At burning temperatures of 550–800 °C, amorphous silica is formed, while crystalline silica is produced at higher temperatures. The specific gravity of RHA varies from 2.11 to 2.27; it is highly porous and light weight, with a very high specific surface area.
How do you use rice husk ash?
The applications of RHA include its use as a pozzolan in the construction industry, as a filler, additive, abrasive agent, oil adsorbent, sweeping component, and as a suspension agent for porcelain enamels. In the construction industry, RHA can be used as a partial replacement for cement.
How do you cement stabilize soil?
Soil cement stabilization is a construction technique used to increase the strength of subgrade soil by mixing it with cement and water. The water hydrates the cement, generating reactions that create a matrix between the soil particles and gives the soil strength.
Which cement is used for soil stabilization?
Cement Stabilized Soil (CSS): An engineered mixture of pulverized in-situ soil, water and moderate proportion of Portland cement, resulting in a semi bound to bound material, with engineering properties similar to an granular material.
What are the methods to improve bearing capacity of soil?
The bearing capacity of a soil can be increased by the following methods:
- By increasing the depth of foundation.
- By draining of the sub-soil under.
- By compacting the soil.
- By confining the soil and preventing it form spreading and lateral movement.
- By increasing the width of foundation.