Synthesis of research on Biogrout soil improvement method

Abstract

Because of the great rhythm of city developments, there is a great need for a new cost effective method for ground improvement. In this paper, a few chemical improvement technologies and a new biological ground improvement method called Biogrout are discussed. The method, used in the paper for a Sarmatian sand in Transylvania (Feleac locality) implies using microorganisms as catalysts in order to induce a microbial carbonate precipitation (MICP) to increase the strength and stiffness of cohesionless soils. For this calcium based procedure, the bacteria Sporosarcina Pasteurii (DSMZ 33) is used, while for the treatment solution urea (CO(NH2)2) and calcium chloride (CaCl2) are used. The study presents the triaxial testing of sand probes treated with Biogrout and the comparison of results obtained with untreated sand probes.

Keywords

• Microbial Induced Carbonate Precipitation (MICP)
• Biogrout
• Sporosarcina Pasteurii