Bioestabilização de um solo arenoso por via enzimatica e com biopolimero: efeito do tempo de cura
DOI:
https://doi.org/10.14195/2184-8394_161_2Palavras-chave:
bioestabilização, enzima urease, biopolímero xantanoResumo
Neste trabalho compara-se a eficiência de duas metodologias para bioestabilização de um solo arenoso: utilização da enzima urease (EICP) e do biopolímero xantano (XG). Com base nos resultados de ensaios UCS e edométricos para diferentes tempos de cura, avaliam-se as repercussões de ambas as metodologias, em termos de resistência à compressão não confinada, módulo de deformabilidade, índice de compressibilidade e tensão de cedência. Comparando ambas as metodologias, constata-se que o tratamento com EICP é mais eficiente na melhoria das propriedades mecânicas, induz um comportamento tensão-deformação mais frágil e conduz a ganhos de resistência e rigidez mais rápidos (≤ 14 dias). Em termos de compressibilidade confinada, consta-se com EICP o aumento da tensão de cedência com o tempo de cura, enquanto a utilização de XG origina a diminuição da tensão de cedência e um significativo aumento do índice de compressibilidade, em resultado da hidratação dos hidrogéis do XG.
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