Stabilized mud blocks are extensively used in India for the construction of houses. This technology was initiated and promoted by department of civil engineering and ASTRA of Indian Institute of Science, Bangalore. When the moisture content in soil reaches the optimum moisture content point, energy density of the soil becomes maximum. Energy input during compaction decides the value of maximum energy density and optimum moisture content. These parameters also influence the compressive strength of the soil. By a suitable combination of densification and mixing of a stabilizing additive, we can develop stabilized mud blocks or soil blocks. The main raw material used for this is soil which consists of clay, silt and sand. There exist three types of stabilized mud blocks-cement based, lime based and bitumen based. In cement stabilized mud blocks, 15% clay and 65% sand are used. Since lime combines with clay effectively, lime stabilized mud blocks are more durable and strong and is preferred over cement stabilized mud blocks.
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