https://repositorio.ifgoiano.edu.br/handle/prefix/219 Tue, 26 May 2026 01:38:48 GMT 2026-05-26T01:38:48Z https://repositorio.ifgoiano.edu.br/handle/prefix/6575 Título: DESENVOLVIMENTO DE CONCRETO DE ULTRA ALTO DESEMPENHO COM INCORPORAÇÃO DE REJEITOS DE MINERAÇÃO E FIBRAS METÁLICAS Autor(es): Morais, Guilherme César Martins de Primeiro Orientador: Sales, Marcel Willian Reis Primeiro Membro da Banca: Castro, Alessandra Lorenzetti de Segundo Membro da Banca: Silva, Philippe Barbosa Abstract: This study investigates the development and properties of Ultra-High Performance Concrete (UHPC) with sand incorporation from mining tailings, seeking to combine high structural performance with sustainability in civil construction. The first chapter presents a systematic literature review that analyzes the state of the art of UHPC, highlighting the fundamental role of mineral additions and metallic fibers in optimizing the compactness of the matrix and ductility of the material. The second chapter details the experimental methodology and the materials used, focusing on the substitution of conventional fine aggregates with mining tailings, aiming to mitigate the environmental impacts of natural sand extraction and reduce production costs. The literature review suggests that the use of mining tailings is technically feasible, and there is a gap to be explored. The results indicate that the mechanical properties remain superior, with a compressive strength above 120 MPa, a dense matrix, and a refined ITZ as shown by SEM. When metallic fibers are incorporated, they combine high fracture energy, toughness, and tensile strength, which are fundamental for applications in critical infrastructure. Editor: Instituto Federal Goiano Tipo: Dissertação Fri, 20 Mar 2026 00:00:00 GMT https://repositorio.ifgoiano.edu.br/handle/prefix/6575 2026-03-20T00:00:00Z https://repositorio.ifgoiano.edu.br/handle/prefix/6527 Título: ARGAMASSAS DE REVESTIMENTO À BASE DE BIOCHAR DO BAMBU E AREIA ARTIFICIAL Autor(es): Tamasauskas, Whellysonn Viana Primeiro Orientador: Alves, Michell Macedo Primeiro Membro da Banca: Sales, Marcel Willian Reis Segundo Membro da Banca: Bacarji, Edgar Abstract: The growing concern with sustainability in the construction industry has driven to research aimed at replacing conventional materials by alternatives that have a lower environmental impact. In this context, the present study evaluated the performance of rendering mortars with partial replacement of Portland cement by bamboo biochar and river sand by manufactured sand derived from crushed stone dust. Five experimental mixes were produced, with gradual substitutions of cement by biochar and natural sand by manufactured sand at levels of 0%, 3%, 5%, 7%, and 10%. The tests performed included compressive strength, bond strength, and capillary water absorption. A systematic literature review revealed that incorporating biochar between 1% and 5% can improve the mechanical strength of mortars. Microstructural analyses indicated an increase in hydration products formation, contributing to the improvement in mechanical performance. Experimental results confirmed that replacing up to 5% of the cement by biochar leads to significant gains in compressive strength and adhesion, while maintaining satisfactory performance in terms of capillary absorption. On the other hand, mixes with substitutions above 7% showed a reduction in mechanical performance. Regarding the fine aggregate, manufactured sand demonstrated technical performance compatible with that of natural sand, proving to be a viable and sustainable alternative. It is concluded that combining biochar and manufactured sand, in appropriate proportions, can contribute to the development of more sustainable construction materials without compromising essential properties such as mechanical strength and durability. Editor: Instituto Federal Goiano Tipo: Dissertação Wed, 06 Aug 2025 00:00:00 GMT https://repositorio.ifgoiano.edu.br/handle/prefix/6527 2025-08-06T00:00:00Z https://repositorio.ifgoiano.edu.br/handle/prefix/6268 Título: DELIMITAÇÃO DE UNIDADES DE PAISAGEM APLICADA A BACIAS HIDROGRÁFICAS, UTILIZANDO PARÂMETROS GEOMORFOMÉTRICOS E EDÁFICOS Autor(es): Queiroz, Alinne de Assis Veras Primeiro Orientador: Angelini, Lucas Peres Primeiro Membro da Banca: Angelini, Lucas Peres Segundo Membro da Banca: Moura, Derick Martins Broges de Terceiro Membro da Banca: Silva Júnior, Édio Damásio Abstract: There are many methods for environmental assessment contributing to maintain ecosystem services, enabling more sustainable use of natural resources and reducing environmental problems. Landscape Unit (LU) Assessment Method stands out among different ones, which is a product of the official Environmental and Productive Zoning (ZAP, Brazilian acronym) manual from Minas Gerais State, a tool designed to develop and monitor economic, social, and environmental management plans. However, the subjectivity in delimitating these units emerges as a challenge, potentially compromising the results accuracy and the environmental analyses effectiveness. Therefore, this paper focuses on delimitating the Landscape Units by geomorphological parameters basing on terrain shape variables (horizontal and vertical curvature), slope, and edaphic characteristics to assist in soil vulnerability and suitability analyses in the VerdinhoRiver watershed. These data were analyzed and considered to generate a detailed classification of Landscape Units, enabling to identify zones with geomorphological and soil characteristics; finally allowing analyzing the units according to their uniqueness in relatively homogeneous natural aspects. The results indicate that the proposed methodology helped to reduce subjectivity in unit definition, making the process more replicable and coherent. Furthermore, the delimited units show a direct relationship with different levels of soil vulnerability and suitability, contributing to more efficient territorial planning. It is concluded that the adopted approach may support future studies, contributing to identify priority areas for conservation and sustainable use. The integration of geospatial technologies proved to be an effective tool for delimiting the Landscape Units, providing greater accuracy in environmental analysis and decision-making support. Editor: Instituto Federal Goiano Tipo: Dissertação Sun, 01 Dec 2024 00:00:00 GMT https://repositorio.ifgoiano.edu.br/handle/prefix/6268 2024-12-01T00:00:00Z https://repositorio.ifgoiano.edu.br/handle/prefix/6124 Título: DINÂMICA DO USO E OCUPAÇÃO DO SOLO EM MINEIROS-GO: IMPLICAÇÕES AMBIENTAIS DETECTADAS POR GEOTECNOLOGIAS Autor(es): Goulart, Pedro Henrique Martins Primeiro Orientador: Angelini, Lucas Peres Primeiro Membro da Banca: Angelini, Lucas Peres Segundo Membro da Banca: Silva Junior, Édio Damásio da Terceiro Membro da Banca: Souza, Natália Sanches Abstract: Land use and occupation correspond to how the territory is used, transformed, and organized by human activities. The study of this dynamic relates to the functions assigned to different areas and the physical characteristics of the interventions carried out, which directly affect the energy balance on the Earth's surface. Changes in land use and occupation reduce the capacity for heat dissipation and increase the absorption of solar radiation, resulting in an increase in surface temperature. This work aims to evaluate the evolution of land use and occupation in the municipality of Mineiros (GO) in recent decades and analyze its impacts on surface temperature. For this purpose, images from the MapBiomas project were used to delineate land use and occupation classes, and data from the thermal bands of Landsat satellites were used to obtain surface temperature information. The results demonstrate that government policies have significantly influenced landscape transformations, stimulating the expansion of agricultural and livestock activities at the expense of native vegetation. The suppression of this natural cover, combined with soil exposure and the intensification of agricultural use, contributes to the significant increase in surface temperature in the municipality. Editor: Instituto Federal Goiano Tipo: Dissertação Wed, 19 Nov 2025 00:00:00 GMT https://repositorio.ifgoiano.edu.br/handle/prefix/6124 2025-11-19T00:00:00Z