Model tests on biogrouted granular columns in soft soil

This paper examines the possible use of a bio-cementation process to reduce excessive bulging that occurs during loading granular columns in soft clays. A 12-phase percolation bio-chemical treatment technique was used bio-cement part targeting upper section, where usually occurs. Upon application unit cell surface loads up 350 kPa, placement bio-cemented column substantially reduced vertical strains by 43% 48% compared with an un-cemented and 56% 60% unreinforced kaolin clay for just low replacement ratio 11%. Bulging 62% 75% following mostly occurred less evident. Scanning electron microscopy energy dispersive spectroscopy validated existence calcium carbonate. study presents relatively new alternative reducing using promising approach.