Mestrado em Engenharia Civil

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http://repositorio.ufes.br/handle/10/17614

Nível: Mestrado Acadêmico
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Navegando Mestrado em Engenharia Civil por Autor "Alledi, Carla Therezinha Dalvi Borjaille"

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    Avaliação do coproduto siderúrgico KR como estabilizador para diferentes tipos de solo
    (Universidade Federal do Espírito Santo, 2024-03-28) Fardin, Henrique Delboni; Gomes, Guilherme José Cunha ; https://orcid.org/0000-0001-9510-4600; http://lattes.cnpq.br/1437609255681568 ; Pires, Patrício José Moreira ; https://orcid.org/0000-0001-5445-1753 ; http://lattes.cnpq.br/0913529658589507 ; https://orcid.org/0009-0005-5351-6021 ; http://lattes.cnpq.br/7146116210406485 ; Ribeiro, Wagner Nahas; https://orcid.org/0000-0002-4130-9093 ; http://lattes.cnpq.br/1143022421703767 ; Alledi, Carla Therezinha Dalvi Borjaille ; https://orcid.org/0000-0002-8429-731X ; http://lattes.cnpq.br/4542859765962073
    Brazilian road transport sector is responsible for 65% of freight transportation and faces challenges, with only 12.4% of its road network paved. The research highlights the shortage of materials for paving, driving the study of the steel co-product KR (CP KR) as a soil stabilizer. As this residue demonstrates technical and environmental feasibility for use in pavements, the aim of the work was to evaluate the performance of the steel co-product type KR as a soil stabilizer for paving. Laboratory tests were conducted to evaluate the physical, mechanical, and mechanistic parameters of soils with different percentages of fines and related to results obtained by other authors. The study on CP-KR for paving revealed its potential in modifying the physical indices of soils and increasing mechanical strength. The greatest increases in strength occur in soils with 55% fines, while the Resilient Modulus increased more in less clayey soils, reaching a strength increase of 275%. The soils showed a significant reduction in plastic deformation, with an average decrease of 72%. The results demonstrated the potential of CP-KR as a soil stabilizer for the composition of road pavements
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    Avaliação em laboratório e em campo por meio de simulador linear de tráfego móvel de solos estabilizados com coproduto KR, cimento Portland e Blindasolo®
    (Universidade Federal do Espírito Santo, 2019-05-09) Furieri, Elaine Cristina; Pires, Patricio Jose Moreira; https://orcid.org/0000000154451753; http://lattes.cnpq.br/0913529658589507; https://orcid.org/; http://lattes.cnpq.br/5817644700538134; Ribeiro, Romulo Castello Henriques; https://orcid.org/; http://lattes.cnpq.br/2908680315943772; Alledi, Carla Therezinha Dalvi Borjaille; https://orcid.org/0000-0002-8429-731X; http://lattes.cnpq.br/4542859765962073; Teixeira, Jamilla Emi Sudo Lutif; https://orcid.org/0000000178054218; http://lattes.cnpq.br/8494517346511042
    Pavements are multi-layer structures, responsible for absorbing and distributing the traffic load of vehicles that circulate through them. The tensions and deformations to which the structure is subjected depend mainly on the thickness of the layers and the rigidity of the materials used. The layers, which constitute a pavement, are often constructed with improved soils and / or soils with other materials, a procedure called soil stabilization. The local soil does not always have adequate characteristics for use in sub-base and base of pavements, and in order to make feasible the work, the stabilization of the local soil becomes necessary. There are consecrated and widely used ways to stabilize a soil for paving purposes, such as Portland cement, but it is necessary to search for new materials, given the high cost and scarcity of natural resources. Recent works show that the steel industries started to include in the process the disulfurization step of liquid pig iron in the Kambara reactor, producing a slag commonly called disulfurization slag from the Kambara reactor (KR co-product). Studies show that this type of slag can trigger pozzolanic reactions, conferring some binding quality, as well as other mechanical properties of resistance. This work studies the incorporation of the KR co-product in granulometry from 0 to 19 mm to the two studied soils, in proportions of 15%, 20% and 25% of KR co-product. The chemical stabilization of soils is also studied with an additive named commercially from Blindasolo®, with reagents and product concentrations indicated by the manufacturer. An experimental program was developed in the laboratory to determine the physical and mechanical characteristics of the soils and mixtures studied. Soon after this stage, four experimental tracks were built in the field with the mixes studied as sub-base and base of the tracks, and each of them, submitted to the HVS (Heavy Vehicle Simulator) mobile traffic simulator. for a number of cycles corresponding to 10 years of project life. In each of the tracks a deflectometric survey was carried out along the simulation to analyze the structural quality of each track. It has been demonstrated through laboratory and field trials that the KR co-product is an option in soil stabilization, indicating this as a possible replacement for the traditional stabilization with Portland cement.
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    COMPARAÇÃO DE CURVAS DE RETENÇÃO E CONDUTIVIDADE HIDRÁULICA DE SOLOS TROPICAIS E TEMPERADOS NÃO SATURADOS
    (Universidade Federal do Espírito Santo, 2020-05-28) Poltronieri, Vinicius Rocha; Bicalho, Katia Vanessa; https://orcid.org/; http://lattes.cnpq.br/9639299365620025; https://orcid.org/; http://lattes.cnpq.br/; Silva, Maristela Gomes da; https://orcid.org/0000000271041972; http://lattes.cnpq.br/4450263733589061; Araujo, Georgia Serafim; https://orcid.org/; http://lattes.cnpq.br/; Dantas, Bruno Teixeira; https://orcid.org/; http://lattes.cnpq.br/9702567694302789; Alledi, Carla Therezinha Dalvi Borjaille
    Knowledge of the soil water retention curve (SWRC) and the hydraulic conductivity curve (HCC) is important in understanding the behavior of unsaturated soils. The called pedotransfer functions (PTFs) are used to transform easy to measure data, such as the