Banca de QUALIFICAÇÃO: ANTONIO ITALCY DE OLIVEIRA JUNIOR

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : ANTONIO ITALCY DE OLIVEIRA JUNIOR
DATE: 28/04/2022
LOCAL: Pós-Graduação Engenharia Civil - on line
TITLE:

Characterization of a Soil Contaminated by Fuels Derived from Petroleum and Treated With Ash of Cane Bags as a Cement Au-Xiliary Additive

KEY WORDS:

Contaminated Soils. Petroleum-derived fuels. Geotechnical behavior. Solidification/Stabilization.

PAGES: 98
BIG AREA: Engenharias
AREA: Engenharia Civil
SUMMARY:

Contamination by petroleum-derived fuels in soils causes changes in physical, chemical and geotechnical characteristics, mainly compaction, shear strength, compressibility, hydraulic conductivity, water retention capacity and material structure. However, few studies have been carried out with tropical soils in Brazil, especially soils in the interior of the Northeast, where the number of fuel stations has grown considerably. The objective of this work is to analyze the behavior of a soil classified as SC from Caruaru-PE through contamination by ethanol, gasoline and diesel oil independently. In this sense, mixtures with contaminant contents of 0, 4, 8 and 16% of each contaminant in relation to the dry weight of soil were analyzed. The experimental program included: physical characterization tests (granulometry, real grain density and Atterberg limits), chemical characterization (pH, organic matter content and XRF), mineralogical characterization (XRD), microstructural characterization (SEM) and geotechnical characterization (compaction , direct shear and edometric compression in flooded and non-flooded conditions, saturated hydraulic conductivity in flexible wall permeameter, characteristic curve by filter paper method). The soil showed an increase in the fine sand content and a reduction in the clay content as the contaminant content increased, in both fuels. The real density of the grains reduced with the increase of the contents of the fuels and the limits of Atterberg increased in a direct way proportional to the contents of the fuels. The pH presented small reductions with the increase of the contaminants content in comparison to the natural soil. The organic matter content increased with the presence of fuels and the compaction presented better parameters with the presence of contaminants. The optimum moisture reduced and the dry specific weight increased as the concentration of contaminants increased. These preliminary results suggest that the contaminants have a high potential for modifying the characteristics of the SC soil of Caruaru and if they are not properly treated, they can cause damage to the foundations of buildings, slopes, infrastructure base layers, among others.

BANKING MEMBERS:
Externo ao Programa - 1742969 - JORGE VINICIUS FERNANDES LIMA CAVALCANTI
Presidente - 2130650 - JOSE FERNANDO THOME JUCA
Externa à Instituição - KARLA SALVAGNI HEINECK - UFRGS
Interno - 1413233 - LEONARDO JOSE DO NASCIMENTO GUIMARAES