Alice Jadneiza Guilherme de Albuquerque Almeida

Objective: The aim of this study is to assess the air and water permeability of soil mixtures with organic compost in different proportions in order to determine the gas and liquid fluxes for use in landfill cover layers. Method: The methodology adopted for this study includes laboratory tests to characterize the materials and the use of the flexible wall permeameter model Tri-flex 2 from Soil Test – ELE to determine the air and water permeability of the materials. Mixtures in proportions of 2:1 (soil:compost) and 1:1 (soil:compost) were used as materials for the oxidative covering layer. Results and Discussion: Based on the results obtained, it is possible to conclude that the mixtures present permeabilities to air and water in accordance with the standards indicated by USEPA (2003) for covering layers in sanitary landfills, thus ensuring that there is no excess percolation of water from rain, as well as the emission of polluting gases into the atmosphere. Research Implications: The studied material is potentially suitable for use in oxidative cover layers for sanitary landfills, proving to be a viable alternative for implementation in smaller municipalities with less purchasing power, reducing the need to use clay materials, without detriment to the operational efficiency of the landfill. Originality/Value: One of the difficulties faced by municipalities in using sanitary landfills is the search for suitable materials, especially in municipalities with lower purchasing power or located in arid regions, where the use of conventional layers presents problems, with drying out and opening of fissures. The relevance and value of this research are evidenced by the feasibility of combining clay soils with organic compost to create oxidative cover layers, reducing the pollutant load of organic waste.

Objective: The aim of this study is to investigate the analysis of the geotechnical behavior of pure soil and mixtures of soil with composted product for use in landfill cover layers. Method: The methodology adopted for this research includes laboratory tests for the physical characterization and determination of the properties of the materials used for the oxidative cover layer. To prepare the oxidative layer, it was necessary to mix organic compost with clay soil. The soil was collected from a deposit located near the Muribeca Landfill in Pernambuco. Results and Discussion: The analyses performed allowed a positive assessment of the geotechnical capacity that the mixtures can provide under the condition of landfill cover layers. The mixtures had a small increase in the proportion of coarser granulometry, reducing the plasticity of the material with the addition of the compost, possibly increasing the permeability of the layer. Also, the addition of compost did not cause a great loss in the geotechnical load-bearing capacity of the material. Research Implications: The material studied has shown potential suitability for use in oxidative covering layers for landfills, proving to be a viable alternative for implementation in smaller municipalities with less purchasing power, effectively reducing the need for the use of clayey materials, without compromising the safety of operation and subsequent use of the landfill site. Originality/Value: One of the difficulties encountered by municipalities in the use of landfills is the search for materials suitable for the solution, especially in municipalities with less purchasing power or located in arid regions, where the use of conventional layers presents problems, with drying out and opening of fissures. The relevance and value of this research are evidenced by the viability of the association of clayey soils with organic compost for the preparation of oxidative covering layers, reducing the pollutant load of organic waste.

The capacity of the soil to support load efforts can be measured from field tests, together with laboratory tests. When it's found a soil with a resistance below the expected one to support the loads coming from the constructions, geotechnical investigations are the main sources for the determination of corrective measures, in order to make the enterprise viable.The objective of this Escolha de alternativa para o melhoramento de solos utilizando resultados de sondagem SPT: um estudo de caso do Agreste Pernambucano

O descarte irregular dos Resíduos da Construção Civil (RCC) acarretam inúmeros transtornos para a população brasileira, como a reprodução de vetores transmissores de doenças, obstrução de vias de drenagens e a desarmonização da paisagem. Neste contexto, o presente trabalho teve como objetivo utilizar os princípios do sistema EKanban no setor operacional, identificando as necessidades de coleta dos clientes e elaborando rotas estratégicas para a eficiência do atendimento, por meio de um estudo de caso em uma empresa transportadora de RCC na Região Metropolitana do Recife (RMR). O Kanban é uma técnica do Sistema Toyota de Produção, que consiste no gerenciamento e controle de estoque através de cartões sinalizadores, seguindo as premissas da produção enxuta, sem falta ou perdas de serviços e produtos. Este estudo resultou em rotas econômicas e viáveis para o atendimento aos clientes, evitando faltas e atrasos na coleta, excesso de resíduos nos clientes, percursos mais longos, entre outras consequências.

A busca por materiais adequados para camadas de cobertura funcional em aterros sanitários é um grande desafio, principalmente para cidades situadas em regiões áridas. O uso de camadas de cobertura convencionais em regiões áridas é quase impossível, devido ao ressecamento do solo e abertura de fissuras que permitem a infiltração de agentes externos nocivos ao aterro. Assim, o objetivo deste estudo é avaliar a resistência da mistura de um solo argiloso utilizado em aterros sanitários com composto orgânico para aplicação em camadas de cobertura. Os ensaios de resistência ao cisalhamento triaxial e direto foram realizados de acordo com as normas ASTM D4767 e D3080, respectivamente, para determinar a resistência mecânica das misturas. Os testes foram realizados em solo de argila pura e misturas com proporções de 2: 1 e 1: 1 (solo: composto) para comparação. Os resultados dos testes mostraram que a adição de composto orgânico não reduz expressivamente a resistência mecânica do solo, garantindo seu uso sem prejuízo da estabilidade e segurança geotécnica do local.