PRECIPITAÇÃO DE CARBONATO DE CÁLCIO INDUZIDO POR UREASE NA ENGENHARIA CIVIL: UMA REVISÃO INTRODUTÓRIA

• DOI: https://doi.org/10.22533/at.ed.6422424045

• Palavras-chave: biocimentação; técnicas sustentáveis; UICP; EICP; MICP.

• Keywords: biocementation; sustainable techniques; UICP; EICP; MICP.

• Abstract: From the intensification of the search for new sustainable techniques for civil construction, the technique of biocementation through biological processes of calcium carbonate precipitation by chemical reactions of urease (Ureolytic-Induced Carbonate Precipitation - UICP), which can be induced microbiologically by the action of bacteria (Microbially induced calcium carbonate - MICP) or by the action of urease enzymes derived from a plant source (Enzyme induced calcium carbonate precipitation (EICP) have shown promise in this sector. The aim of this work was to describe current scientific research on the UICP technique, as well as to identify the main parameters, influencing factors and applications of biocementation processes induced by the action of bacteria and enzymes in the area of civil engineering. Applications of these methods in geotechnics and cementitious materials are presented, highlighting improvements in mechanical strength, geotechnical stability and durability of treated materials. Research has shown that EICP offers significant benefits compared to MICP, from its simplicity of application to its oxygen independence and ability to fill smaller pores. However, the absence of microorganisms may affect the morphology and strength of precipitated carbonate in EICP. This critical analysis is critical to direct future research and practical applications, as EICP and MICP processes represent sustainable and promising forms for civil construction and contribute to the advancement in the field of biocementation.