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      Influência da composição granulométrica das partículas de resíduos de madeira nas propriedades de compósitos minerais: parte 1 - cimento-madeira Translated title: Influence of particle size of wood waste on the properties of mineral composites: part 1 - cement-wood

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          Abstract

          Resumo Compósitos de fibras naturais são uma alternativa para absorver os resíduos de construção e demolição (RCD) de madeira, o que reduz os impactos ambientais e contribui com o desenvolvimento de materiais, produtos e processos mais sustentáveis. Pesquisadores têm obtido resultados promissores com compósitos contendo diferentes dimensões de partículas. O objetivo deste estudo foi avaliar a influência da composição granulométrica das partículas de madeira provenientes de RCD nas propriedades físicas e mecânicas de compósitos de cimento-madeira. As partículas de madeira foram moídas em moinho de martelos e caracterizadas. Foi utilizado o cimento Portland, o aditivo acelerador de pega e a água. Os compósitos foram produzidos com diferentes relações aglomerante-madeira com relação água-cimento fixada em 0,50 em massa. A partir dos resultados dos ensaios no estado fresco e endurecido, verificou-se que os valores de massa unitária das partículas de madeira influenciaram nas propriedades físicas e, consequentemente, no desempenho mecânico dos compósitos. Como conclusão tem-se que a composição granulométrica P1,2 resultou na menor densidade de massa endurecida, enquanto a composição granulométrica P1 proporcionou maior resistência à tração na flexão.

          Translated abstract

          Abstract Natural fibre composites are an alternative to absorb wood construction and demolition waste (CDW), reducing environmental impact, contributing to the development of more sustainable materials, products, and processes. Researchers have obtained promising results with composites containing different particle sizes. The aim of this study was to evaluate the influence of particle size distribution of wood from CDW on the physical and mechanical properties of cement-wood composites. The wood particles were milled in hammer mills and characterised. Portland cement, a setting time accelerator and water were used. The composites were produced with different binder/wood ratios with the water/cement ratio fixed at 0.50 (by mass). The results of the tests in the fresh and hardened state showed that the values of unit weight of the wood particles influenced the physical properties and, consequently, the mechanical performance of the composites. The study concluded that the P1,2 particle size distribution resulted in lower hardened mass density, while the P1 particle size distribution provided higher tensile strength in flexion.

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          Kenaf fiber reinforced composites: A review

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            Trend of the research on construction and demolition waste management.

            Research interests in addressing construction and demolition (C&D) waste management issues have resulted in a large amount of publications during the last decade. This study demonstrates that there is no systematic examination on the research development in literature in the discipline of C&D waste management. This study presents the latest research trend in the discipline through analyzing the publications from 2000 to 2009 in eight major international journals. The analysis is conducted on the number of papers published annually, main authors' contributions, research methods and data analysis methods adopted, and research topics covered. The results exhibit an increasing research interest in C&D waste management in recent years. Researchers from developed economies have contributed significantly to the development of the research in the discipline. Some developing countries such as Malaysia and China have also been making good efforts in promoting C&D waste management research. The findings from this study also indicate that survey and case study are major methods for data collection, and the data are mostly processed through descriptive analysis. It is anticipated that more future studies on C&D waste management will be led by researchers from developing economies, where construction works will remain their major economic activities. On the other hand, more sophisticated modeling and simulating techniques have been used effectively in a number of studies on C&D waste management research, and this is considered a major methodology for future research in the discipline. C&D waste management will continue to be a hot research topic in the future, in particularly, the importance of human factors in C&D waste management has emerged as a new challenging topic.
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              Plant-based natural fibre reinforced cement composites: A review

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Journal
                ac
                Ambiente Construído
                Ambient. constr.
                Associação Nacional de Tecnologia do Ambiente Construído - ANTAC (Porto Alegre, RS, Brazil )
                1678-8621
                September 2019
                : 19
                : 3
                : 113-126
                Affiliations
                [2] Curitiba Paraná orgnameUniversidade Federal do Paraná Brazil
                [1] Curitiba Paraná orgnameUniversidade Federal do Paraná Brazil
                [3] Curitiba Paraná orgnameUniversidade Federal do Paraná Brazil
                Article
                S1678-86212019000300113
                10.1590/s1678-86212019000300328
                a06e6d2f-7ac4-4b51-96ad-cd14738c9f07

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 12 November 2018
                : 29 March 2018
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 54, Pages: 14
                Product

                SciELO Brazil

                Categories
                Artigos

                Composites,Wood particles,Particle size distribution,Portland cement,Resíduos de Construção e Demolição (RCD),Compósitos,Partículas de madeira,Composição granulométrica,Cimento Portland,Construction and Demolition Waste (CDW)

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