Stabilization Characteristics of Different Loose Sandy Soils using Microbial-Induced Calcite Precipitation

Loose sands (siliceous, silty, and calcareous classes) are extensively found near arid areas in Egypt. Furthermore, many geotechnical structures, like water channels roads, may be constructed on weak or loose sand soils. The behavior of is usually connected with different interdependent problems, such as high permeability, low shear strength, bearing capacity, seepage, stability. This work characterized the effect stabilization siliceous, sandy soils via biocementation process using Sporosarcina pasteurii bacteria a potential eco, commercial, engineering solution. was carried out bacteria, fixation, cementation solutions (BFC) at times number additions. results indicated that addition solution have remarkable physical mechanical properties also proved precipitation calcite by bacterial activity led to cohesion soil grains, this increased resistance deterioration. In addition, content precipitated calcium carbonate enhanced strength unconfined compressive decreased permeability. S. can used successfully commercially for siliceous sand, silty Egypt recommended conditions mixes.