Reducing Soil Permeability Using Bacteria-Produced Biopolymer

The building of civil engineering structures on some soils requires their stabilisation. Although Portland cement is the most used substance to stabilise soils, it associated with a lot environmental concerns. Therefore, very pertinent study more sustainable alternative methodologies replace use cement. Thus, this work analyses ability xanthan-like biopolymer, produced by Stenotrophomonas maltophilia Faro439 strain (LabXLG), reduce permeability sandy soil. Additionally, effectiveness LabXLG compared commercial xanthan gum (XG) and for various hydraulic gradients curing times. results show that treatment either type XG can be over short term (curing time less than 14 days), although greater level obtained XG, due its higher purity. soil creates network fibres link particles, while fills voids homogeneous paste.