Valdecir Ângelo Quarcioni

ORCID: 0000-0003-0840-4758
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About
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Research Areas
  • Concrete and Cement Materials Research
  • Recycling and utilization of industrial and municipal waste in materials production
  • Recycled Aggregate Concrete Performance
  • Concrete Corrosion and Durability
  • Building materials and conservation
  • Innovative concrete reinforcement materials
  • Metallurgical Processes and Thermodynamics
  • Magnesium Oxide Properties and Applications
  • Materials Engineering and Processing
  • Conservation Techniques and Studies
  • Corrosion Behavior and Inhibition
  • Smart Materials for Construction
  • Pigment Synthesis and Properties
  • Thermal and Kinetic Analysis
  • Academic Research in Diverse Fields
  • Iron and Steelmaking Processes
  • Metal Extraction and Bioleaching
  • Clay minerals and soil interactions
  • Chemical Thermodynamics and Molecular Structure
  • Concrete Properties and Behavior
  • American Literature and Humor Studies
  • Iron oxide chemistry and applications
  • Cultural Heritage Materials Analysis
  • Bauxite Residue and Utilization
  • Plant Physiology and Cultivation Studies

Instituto de Pesquisas Tecnológicas
2014-2024

Expertise Engenharia (Brazil)
2016

Institute for Scientific and Technological Research
2015

Brf (Brazil)
2014

In this work, comments are made about indirect methods and direct Chapelle's method applied to the determination of reactivity pozzolanic materials. The is based on lime-pozzolan reaction quantifies any material intended be by cement industry. This lime consumption pozzolan through can with mass proportions - lime:pozzolan 1:1, as originally proposed Chapelle or 2:1, specified in Brazilian French Standards. Comparative results both presented for sugar cane bagasse ash, rice rusk silica fume,...

10.1590/s1983-41952015000100002 article EN cc-by Revista IBRACON de Estruturas e Materiais 2015-02-01

Hydrated cementitious fines can be recycled by thermal treatment (<500°C) as an alternative binder with low energy consumption and carbon dioxide (CO2) emissions during production. This paper analyzed the transformations of phases dehydration rehydration slag–portland cement pastes using laser diffraction, surface area, X-ray fluorescence, thermogravimetry, isothermal calorimetry, compressive strength tests. Dehydrated slag rehydrated, reforming similar to that formed pure hydration clinker...

10.1061/(asce)mt.1943-5533.0002725 article EN Journal of Materials in Civil Engineering 2019-05-17

Construction and demolition waste (CDW) worldwide generation accounts 10 billion tonnes yearly. The major fraction is landfilled requiring innovative recycling methods to reduce the associated environmental impacts increase its circularity. Our study demonstrated feasibility of using different CDW fines develop recycled cements optimized content with well-graded crushed stone (WGCS) for use as pavement base layer. We scaled up obtaining cement aggregates from a local plant, well pilot...

10.1177/0734242x241227370 article EN cc-by-nc Waste Management & Research The Journal for a Sustainable Circular Economy 2024-02-21

An investigation into the effects of external sulfate attack (ESA) on mechanical and microstructural properties steel fibre-reinforced sprayed concrete (SFRSC) was conducted. Crimped carbon fibres, 40 mm long, were used as reinforcement in three different mixtures with specified fibre contents 30, 60 90 kg/m 3 . Cylindrical specimens, drilled from SFRSC panels, subjected to for up 270 days. Double-punch tests determine matrix crack strength post-crack tensile SFRSC. The effective content...

10.1680/jmacr.23.00251 article EN Magazine of Concrete Research 2024-02-17

There are currently many types of protective materials for reinforced concrete structures and the influence these in chloride diffusion coefficient water penetration still needs more research. The aim this work is to analyze contributions regarding typical three surface protection systems (coatings, linings pore blockers) discusses results blockers (sodium silicate) tested work. To end, certain tests were used: one involving permeability mechanism (low pressure-immersion absorption),...

10.1016/s1452-3981(23)16229-8 article EN cc-by-nc-nd International Journal of Electrochemical Science 2012-10-01

RESUMO A seleção de adição mineral pozolânica para compor a matriz cimento Portland requer determinação prévia sua reatividade, o que é realizado diretamente, por meio do ensaio Chapelle modificado (NBR 15.895), ou indiretamente, pelo resistência à compressão argamassa com cal 5.751). O teor hidróxido cálcio fixado pela pozolana e, consequentemente, os compostos hidratados formados, são subsídios na avaliação e discussão dos métodos normativos utilizados caracterizar atividade pozolânica....

10.1590/s1517-707620170003.0206 article PT cc-by Matéria (Rio de Janeiro) 2017-08-09

Resumo: Este trabalho focalizou as propriedades pozolânicas de residuos cerâmica vermelha (RCV), suas relacoes com a composicao das materias-primas utilizadas nas industrias (massas cerâmicas) e temperatura queima, vistas ao aproveitamento dos RCV como produto cimenticio. A reatividade pozolânica obtida pelo Ensaio Chapelle quimica amostras representativas do polo cerâmico paulista Panorama mostraram resultados promissores para o desses adicao mineral em cimentos concretos. Constatou-se que...

10.4322/cerind.2014.083 article PT Cerâmica Industrial 2014-01-01

&lt;p&gt;Com intuito de se obter vantagens técnicas, econômicas e ambientais, vem acentuando o interesse da indústria do cimento para adições minerais em substituição parcial ao clínquer no Portland. Uma das mais comuns que ganhando espaço mercado brasileiro corresponde à argila calcinada, agrega basicamente as características pozolanicidade aos seus produtos compostos. Um material com propriedades potencialmente similares às argilas calcinadas ainda não aproveitado como pozolana país...

10.1590/0366-69132015613581847 article PT cc-by-nc Cerâmica 2015-06-01

RESUMO O resíduo de cerâmica vermelha (RCV) proveniente blocos e tijolos é gerado na produção destes artefatos indústria da construção civil, quando execução das vedações verticais. No primeiro caso, o apresenta menor teor contaminantes, enquanto no segundo, contém maior grau impurezas devido à estocagem com outros materiais residuais previamente destinação final. volume RCV requer adequada para evitar impactos ambientais, conforme estabelece a Resolução 307 do Conselho Nacional Meio...

10.1590/s1517-707620160002.0028 article PT cc-by Matéria (Rio de Janeiro) 2016-06-01

Resumo Atualmente, com a incorporação de adições minerais, é possível produzir cimentos compostos características específicas para uma determinada aplicação. Além da economia associada à redução energia e clínquer, o crescimento utilização desses deve-se ao seu melhor desempenho mecânico durabilidade quando comparado cimento comum. Neste contexto, no presente trabalho, resíduo cerâmica vermelha foi moído produção adição mineral. Posteriormente, ele combinado um Portland alta resistência...

10.1590/0366-69132017633652036 article PT cc-by-nc Cerâmica 2017-03-01

Abstract The dehydration, thermal decomposition and transition phase stage of Zn(II)‐diclofenac compound were studied by simultaneous TG‐DTA DSC techniques. TG curves this obtained with the mass sample 2 5 mg. Additionally, carried out in opened closed α‐alumina pans under static nitrogen atmosphere. DTA show that possesses exothermic between 170‐180 °C, which it is irreversible (monotropic reaction). kinetics study was evaluated non‐isothermal conditions. data isoconversional method, where...

10.1002/jccs.201000057 article EN Journal of the Chinese Chemical Society 2010-06-01

Resumo A presença de cal nas argamassas mistas é responsável pelo aumento na demanda água amassamento para uma dada consistência. adicional, que não consumida hidratação do cimento, permanece livre no sistema e, ao evaporar, dá origem a porosidade elevada da argamassa endurecida. Este trabalho apresenta o método cálculo volumes como ferramenta estimar partir seus constituintes, inclusive cal, bem sua correlação com propriedades relevantes estado endurecido. O apresentado mostrou-se favorável...

10.1590/s1678-86212009000400526 article PT cc-by Ambiente Construído 2009-12-01

There are some ways to extend the service life of a reinforced concrete structure. This paper focuses on extension by treating surface concrete, specifically effect cover thickness treatment system efficacy. Thus, chloride migration tests were performed and diffusion coefficients calculated. The each case (treated or non-treated concrete) was estimated using these data Fick's second law diffusion. Results indicated that thicker is, greater efficacy will be. dissemination this information is...

10.1590/0370-44672014690092 article EN cc-by REM - International Engineering Journal 2016-07-30

Abstract This article explores the fundamental concepts related to durability of existing reinforced concrete structures, focusing on its monitoring. It compares current approach adopted in major projects with that applied other structures service. presents principles Structural Health Monitoring (SHM) and examines various sensor solutions available market developed research projects. emphasizes feasibility democratizing structural monitoring, which is currently limited by cultural barriers....

10.1590/s1983-41952024000600014 article EN cc-by Revista IBRACON de Estruturas e Materiais 2024-01-01
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