Graziela Serafim Casagrande, Alexandre Zaccaron, David Batista Gesuino, Pedro Gabriel Ambrosio, Sérgio Luciano Galatto, Rosimeri Venâncio Redivo, Kristian Madeira, Fábio Rosso, Michael Peterson
{"title":"Análise da viabilidade técnica e ambiental da adição de resíduos provenientes de termoelétrica e beneficiamento de carvão em massa de cerâmica vermelha","authors":"Graziela Serafim Casagrande, Alexandre Zaccaron, David Batista Gesuino, Pedro Gabriel Ambrosio, Sérgio Luciano Galatto, Rosimeri Venâncio Redivo, Kristian Madeira, Fábio Rosso, Michael Peterson","doi":"10.1590/1517-7076-rmat-2023-0066","DOIUrl":"https://doi.org/10.1590/1517-7076-rmat-2023-0066","url":null,"abstract":"RESUMO A investigação teve por objetivo analisar a viabilidade técnica de incorporação do resíduo proveniente do filtro prensa do processo de beneficiamento do carvão mineral (TFP) e de cinzas pesadas (CP) advindos de uma termoelétrica, em massa cerâmica na escala laboratorial. Foram realizados ensaios de caracterização físico-química e de classificação dos resíduos. Posteriormente foram desenvolvidas dez formulações através de planejamento experimental por delineamento de misturas simplex centroide, incorporando esses resíduos a uma massa padrão de cerâmica vermelha. Os corpos-de-prova foram conformados por extrusão sem vácuo e submetidos a tratamento térmico em estufa e queima em forno mufla a 900 °C. As propriedades tecnológicas avaliadas foram: retração térmica linear de secagem e de queima, absorção de água e resistência mecânica à compressão e por fim, foram realizados testes de eflorescência e análise fitotoxicológica. Os resultados de classificação dos resíduos, indicaram esses como não sendo perigoso – Classe II-B – inerte. Os testes físicos dos corpos-de-prova mostram que comparados a formulação base de cerâmica vermelha (STD), as demais formulações obtiveram resultados dentro dos parâmetros técnicos, que podem ser posteriormente realizados em um ensaio de escala industrial. Embora os ensaios mecânicos das provas com incorporação de resíduo ficaram abaixo da formulação base (STD), não se descarta uma prova em escala similar a industrial. No ensaio de eflorescência, observou-se que não houve presença de sais solúveis. E por fim, no ensaio fitotoxicológico, com Allium cepa L. de uma formulação com agregação de todas matérias-primas juntas, apresentou um resultado próximos ao padrão, se mostrando apto a reprodução em escala industrial.","PeriodicalId":18260,"journal":{"name":"Materia-rio De Janeiro","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136203421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kamalasekar Athiappan, Rajiah Murugasan, Chandrakasu Makendran, Francis Michael Raj
{"title":"Mechanical properties of asphalt mixtures containing reclaimed asphalt incorporating Acrylonitrile Butadiene Styrene (ABS)","authors":"Kamalasekar Athiappan, Rajiah Murugasan, Chandrakasu Makendran, Francis Michael Raj","doi":"10.1590/1517-7076-rmat-2023-0201","DOIUrl":"https://doi.org/10.1590/1517-7076-rmat-2023-0201","url":null,"abstract":"Huge accumulations of Recycled asphalt pavement (RAP), scarcity of bitumen obtained from natural resources, RAP causing environmental pollution, and increased construction of flexible pavement all over the world led the researchers to reuse the improved aged bitumen by modifiers. Hence, in this research, the reclaimed aged asphalt improved by ABS (5% weight of virgin bitumen) was partially replaced by virgin bitumen (10 to 60% with an increment of 10%) used in the asphalt mix, and mechanical properties such as stability, flow, rutting resistance, fatigue life, Indirect Tensile strength, and resilient modulus were investigated. The research concluded that the aged reclaimed asphalt containing 5% ABS can be partially replaced up to 30% by conventional virgin bitumen, exhibiting better performance without compromising the mechanical properties of the asphalt mix.","PeriodicalId":18260,"journal":{"name":"Materia-rio De Janeiro","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135106519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Felipe Pereira Santos, Alan Renato Estrada Cáceres, Rafael Celeghini Santiago, Antonio Domingues de Figueiredo, Luís Antônio Guimarães Bitencourt Júnior
{"title":"Investigation of specimen size effect on the use of double punch test as quality control method of the steel fiber reinforced shotcrete","authors":"Felipe Pereira Santos, Alan Renato Estrada Cáceres, Rafael Celeghini Santiago, Antonio Domingues de Figueiredo, Luís Antônio Guimarães Bitencourt Júnior","doi":"10.1590/1517-7076-rmat-2023-0147","DOIUrl":"https://doi.org/10.1590/1517-7076-rmat-2023-0147","url":null,"abstract":"","PeriodicalId":18260,"journal":{"name":"Materia-rio De Janeiro","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135700055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Influence of eco-friendly lightweight aggregates in mechanical and durability properties of geopolymer concrete","authors":"Parvathi Rajalekshmi, Prakash Arul Jose","doi":"10.1590/1517-7076-rmat-2023-0209","DOIUrl":"https://doi.org/10.1590/1517-7076-rmat-2023-0209","url":null,"abstract":"This research is to replace natural coarse aggregate as 20%, 40%, 60%, 80%, and 100% respectively, by weight in an M20 grade geopolymer concrete. The geopolymer concrete with different mixes is subjected to fresh, hardened, and durability tests. Utilization of thermal ash aggregates increased the slump and compressive strength of geopolymer concrete by about 15% and 9% respectively. Whereas the slump and compressive strength of geopolymer concrete decreased by about 30% and 38% respectively by using 100% Lightweight Expanded Clay Aggregate (LECA). Density reduction in geopolymer concrete was found by using both thermal ash aggregate and lightweight expanded clay aggregate for about 9% and 28% respectively. Thermal ash aggregate decreased the density of geopolymer concrete up to 1850 kg/m3 and improved the strength up to 24.50 N/mm2, on the other side using lightweight expanded clay aggregate, the density of geopolymer concrete drastically decreased up to 1250 kg/m3 with a huge decrease in strength up to 14 N/mm2. Other mechanical test results showed similar variations with respect to the compression test results. To ensure the durability of lightweight geopolymer concrete for mixes of GPC, TM5, and LM2 conducted tests like acid resistance, sulphate resistance, salt resistance, water absorption, accelerated corrosion, and sorptivity test.","PeriodicalId":18260,"journal":{"name":"Materia-rio De Janeiro","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135214716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ricardo Alan da Silva Vieira, Erbenia Taciane Fernandes da Fonseca, Manoel Quirino da Silva Júnior, Edgley Alves de Oliveira Paula, Fernanda Monique da Silva, Felipe Bento de Albuquerque, Joalis Barbalho de Souza, Fernando Rusch, Mário Vanoli Scatolino, Rafael Rodolfo de Melo
{"title":"Efeito da temperatura e pressão nas propriedades da liga de titânio Ti-6Aℓ-4V produzida a partir da metalurgia do pó","authors":"Ricardo Alan da Silva Vieira, Erbenia Taciane Fernandes da Fonseca, Manoel Quirino da Silva Júnior, Edgley Alves de Oliveira Paula, Fernanda Monique da Silva, Felipe Bento de Albuquerque, Joalis Barbalho de Souza, Fernando Rusch, Mário Vanoli Scatolino, Rafael Rodolfo de Melo","doi":"10.1590/1517-7076-rmat-2023-0196","DOIUrl":"https://doi.org/10.1590/1517-7076-rmat-2023-0196","url":null,"abstract":"RESUMO Foram caracterizadas micro estruturalmente e mecanicamente a liga Ti-6Aℓ-4V obtida através da metalurgia do pó em atmosfera não controlada variando os parâmetros de sinterização. As amostras foram compactadas em uma prensa uniaxial à 874 MPa, 999 MPa e 1124 MPa, e sinterizadas sem atmosfera protetora ou vácuo, nas temperaturas de 675 °C, 750 °C e 850 °C. Ao sinterizar o material, houve influência dos óxidos nos resultados devido à alta afinidade que o titânio tem por elementos intersticiais, promovendo um aumento na densidade e elevados valores de dureza. A partir dos resultados verificou-se que o tratamento realizado na pressão de 1124 MPa e temperatura de 750 °C foi o que apontou a maior dureza na fase beta (β), sendo o valor de 1165,1 HV. Na fase alfa (α), o maior valor foi de 1321,3 HV, apresentado pelo tratamento realizado na pressão de 999 MPa e temperatura de 850 °C. Os elevados valores na dureza observados na liga estão associados ao reforço promovido pela dissolução átomos de Fe. Materiais com elevada dureza possuem uma vasta aplicação nas indústrias aeroespaciais e biomédicas, que buscam sempre por melhores resultados de resistência mecânica, aumentando assim a vida útil e a aplicabilidades de seus produtos.","PeriodicalId":18260,"journal":{"name":"Materia-rio De Janeiro","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136202598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Experimental investigation on mechanical behavior of geopolymer light weight concrete","authors":"Suresh Kumar Paramasivam, Suganya Rajendran","doi":"10.1590/1517-7076-rmat-2023-0160","DOIUrl":"https://doi.org/10.1590/1517-7076-rmat-2023-0160","url":null,"abstract":"The development of lightweight geopolymer concrete is the main goal of this research work, and the outcomes were evaluated in comparison to the control mix. In this work, geopolymer concrete was produced using fly ash as a binder, synthetic sand as M-sand as fine aggregate, and coconut shell as well as palm shell ash for coarse aggregate. For the purpose of selecting a mix proportion via trial mixes, an initial investigation was conducted. The quantity among binder, fine and coarse aggregate, sodium hydroxide molarity, sodium silicate: sodium hydroxide ratio, the alkaline binder ratio is some of the significant variables taken into account in the current study. Investigation of the effects of various factors on the engineering characteristics of geopolymer concrete. The trial mixes were utilized to evaluate the characteristics for geopolymer concrete with a ratio of 1: 2.36 :1.02 and a Molarity of 16 with binder ratio 0.6 The key findings of this investigation is to that the coconut shell waste and palm shell can be replaced instead of fine aggregate. In-depth research was done on the mechanical behavior with geopolymer concrete, such as the mechanical and durability characteristics with control mix.","PeriodicalId":18260,"journal":{"name":"Materia-rio De Janeiro","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135151774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of surface parameters on anti-loosening performance of bolts for engineering machinery","authors":"Can Wang, Qingchao Sun, Shuaishuai Han","doi":"10.1590/1517-7076-rmat-2023-0159","DOIUrl":"https://doi.org/10.1590/1517-7076-rmat-2023-0159","url":null,"abstract":"","PeriodicalId":18260,"journal":{"name":"Materia-rio De Janeiro","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135699763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Danilo Helder de Melo Pereira, Douglas Henrique de Melo Pereira, Romulo Rocha de Araújo Lima, Ionaldo Bezerra Alves dos Passos, Lindembergue Pereira Costa Júnior, Ricardo Artur Sanguinetti Ferreira
{"title":"Análise das tensões residuais utilizando método DPC na soldagem GTAW multipasse do aço ASTM A131 AH36 com chanfros em “V” e em “U”","authors":"Danilo Helder de Melo Pereira, Douglas Henrique de Melo Pereira, Romulo Rocha de Araújo Lima, Ionaldo Bezerra Alves dos Passos, Lindembergue Pereira Costa Júnior, Ricardo Artur Sanguinetti Ferreira","doi":"10.1590/1517-7076-rmat-2023-0212","DOIUrl":"https://doi.org/10.1590/1517-7076-rmat-2023-0212","url":null,"abstract":"RESUMO Análise de tensões residuais realizada em juntas soldadas pelo processo TIG utilizando metal de base ASTM A131 AH36 comparando diferentes projetos de junta. Uma parte com chanfro usinado em formato de “V” e outra em forma de “U”. Também foi correlacionado variáveis de acabamento com passe único oscilante ou com passe duplo retilíneo. O resultado das tensões foi obtido através do método DPC (deslocamento de pontos coordenados). Os corpos de prova foram soldados segundo as normas (fabricação e qualificação) AWS D1.1. Após a soldagem foram realizadas furações na zona termicamente afetada nas mediações centrais do eixo de soldagem em uma mesa de medição por coordenadas. As soldas foram submetidas a tratamento térmico para alívio de tensões (TTAT) e mensurou-se os deslocamentos dos furos causados pelo TTAT, possibilitando o cálculo das tensões residuais. Os resultados demostraram menores níveis de tensões juntas em “U” e boa aplicabilidade do método DPC.","PeriodicalId":18260,"journal":{"name":"Materia-rio De Janeiro","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135495082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Structural performance of hybrid FRP laminates on concrete beams made with manufactured sand","authors":"Manikandan Kesavakannan, Ramasamy Vasudevan","doi":"10.1590/1517-7076-rmat-2023-0186","DOIUrl":"https://doi.org/10.1590/1517-7076-rmat-2023-0186","url":null,"abstract":"","PeriodicalId":18260,"journal":{"name":"Materia-rio De Janeiro","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134883471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hektor Oliveira Borges, Jorge Luis Braz Medeiros, Luciano Volcanoglo Biehl, Carlos Otávio Damas Martins, Carlos Alberto Mendes Moraes, José de Souza
{"title":"Analysis of the influence of the composition and quenching parameters on the performance of some dual phase in HSLA steels","authors":"Hektor Oliveira Borges, Jorge Luis Braz Medeiros, Luciano Volcanoglo Biehl, Carlos Otávio Damas Martins, Carlos Alberto Mendes Moraes, José de Souza","doi":"10.1590/1517-7076-rmat-2023-0144","DOIUrl":"https://doi.org/10.1590/1517-7076-rmat-2023-0144","url":null,"abstract":"Due to its combination of high mechanical properties, good formability, and low production cost, steel is a key material with potential for improvement in the metallurgical industry. Based on these conditions, this research evaluated the influence of material composition and incomplete austenitization parameters on the final metallurgical and mechanical properties of high-strength microalloyed steels after cooling in a medium with high severity. The applied cycle was based on the intercritical thermal treatment of microalloyed steels with niobium (Nb) and titanium (Ti) to increase the mechanical resistance and guarantee the tenacity of the material. An experimental study was carried out testing three intercritical temperatures, 806 °C, 775 °C, and 740 °C, with subsequent cooling in polymeric solutions in water. The studies showed that the intercritical temperature variation directly contributed to the difference in the second phase microstructure present in the samples. The heat treatment findings resulted in a microhardness of 434.2 HV0.01, characterizing the low-carbon martensite. The presence of a matrix consisting of ferrite and a second phase of low-carbon martensite promoted the typical behavior of dual phase steel. In the x ray diffraction, the presence of retained austenite was not evidenced, indicating the efficiency of the cooling rate. The experiments confirmed the influence of different engineering parameters and intercritical treatment on the mechanical properties. The study enriches the current knowledge about the development of variables for the development of dual phase steel from microalloying elements.","PeriodicalId":18260,"journal":{"name":"Materia-rio De Janeiro","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136202399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}