Stabilized mud block | Compressed Earth Block

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Stabilized mud block (SMB),Compressed Earth Block (CEB)

A compressed earth block (CEB), also known as a pressed earth block or a compressed soil block, is a building material made primarily from damp soil compressed at high pressure to form blocks. Compressed earth blocks use a mechanical press to form blocks out of an appropriate mix of fairly dry inorganic subsoil, non-expansive clay and aggregate.
If the blocks are stabilized with a chemical binder such as Portland cement they are called compressed stabilized earth block (CSEB) or stabilized earth block (SEB) or stabilized mud block (SMB). Typically, around 3,000 psi (21 MPa) is applied in compression, and the original soil volume is reduced by about half.It is cast in situ product.The mud available on the site are used for this product.95 % mud and 5% cement are its admixtures. It is hardened by pressing a special kind of machine .24 x 24 x 9 cm size are commonly used.It used for low cost construction. Because of high exterior finishing no need of plastering required

Stabilized Mud Block Technology is a simple, cost effective, environmental friendly technology developed by Centre for Science and Technology, Indian Institute of Science, Bangalore. It utilizes local materials and reduced energy consumption and thus, reduces the cost.
Advantages Stabilized Mud Block
Energy efficient- 70% savings when compared to burnt bricks Economical (20-40% when compared to brick masonry). The net financial advantage in terms of labour per block is Rs.1.50 whereas in conventional methods is 30-40p Plastering of walls can be eliminated Highly decentralized production Better block finish Aesthetically pleasing Lower amount of mortar required for wall construction
Technology component of the Project
Concept/ Process of Production of Stabilized Mud Blocks The process of production involves Sieving the soil Mixing the soil with sand and stabilizer such as cement and lime Mixing of optimum quantity of water Pressing the wet mixture into a dense solid block using a simple manually operated machine Curing the block for a period of 3-4 weeks by sprinkling moisture
Type of Soil
Soils containing predominantly non expansive clay minerals are suited for cement stabilized blocks. Most of the red loamy soils are suitable with minor modifications. Expansive soil such as black cotton soil requires addition of lime and the process of making SMB is cumbersome using black cotton soil. Highly silty soils also pose problems of green strength and compaction. Soil with 10 15% clay and > 65% sand is ideal for SMB production using cement as a stabilizer. If some soils contain more clay fraction, then it is advisable to bring down the clay fraction by addition of sand or inert materials like stone quarry dust. Read more from Adithya NGO ConsultancyEARTH-AUROVILLE ARCHISAGE

A compressed earth block (CEB)

A compressed earth block (CEB), also known as a pressed earth block or a compressed soil block, is a building material made primarily from damp soil compressed at high pressure to form blocks. Compressed earth blocks use a mechanical press to form blocks out of an appropriate mix of fairly dry inorganic subsoil, non-expansive clay and aggregate. If the blocks are stabilized with a chemical binder such as Portland cement they are called compressed stabilized earth block (CSEB) or stabilized earth block (SEB). Typically, around 3,000 psi (21 MPa) is applied in compression, and the original soil volume is reduced by about half.