Resumo

VALENCIA GONZALEZ, Yamile; CAMAPUM DE CARVALHO, José  e  LARA VALENCIA, Luis Augusto. Carbonatogénesis induced in a profile of tropical soil. Rev.fac.ing.univ. Antioquia [online]. 2014, n.72, pp.229-240. ISSN 0120-6230.

In soils can be generated a natural process called ''biomineralization'' or ''bioprecipitation'' by which living organisms produce crystalline or amorphous mineral precipitates. This process is very important in geotechnical engineering because the mineral precipitates can fill the gaps or link soil particles to improve geological and geotechnical properties of the material; however, the process can take many years to occur naturally. Is for this reason that this study seeks to induce in few days (15 days) the calcium carbonate minerals precipitation, based on the addition of a nutrient precipitator over existing native bacteria in a tropical soil profile, improving their engineering properties through the reduction of the void index, shrinkage, permeability, collapse, erodibility and breakdown, and the increase of friction angles and cohesion, producing less environmental impact than other techniques commonly used in engineering.

Palavras-chave : Bioprecipitation; biomineralization; carbonatogenesis; tropical soil.

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