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Experimental investigation on flexural performance of functionally graded concrete beams using flyash and red mud
ABSTRACT The continuous change in the strength and other properties, environmental problems, hike in cement price, advancement of construction industry makes the usage of alternative materials as Functionally graded materials (FGM) which leads to a new materials on concrete as Functionally graded co...
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Published in: | Matéria 2021, Vol.26 (1) |
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Main Authors: | , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | ABSTRACT The continuous change in the strength and other properties, environmental problems, hike in cement price, advancement of construction industry makes the usage of alternative materials as Functionally graded materials (FGM) which leads to a new materials on concrete as Functionally graded concrete (FGC), In this present paper, investigation has carried out on the functionally graded concrete by using red mud and also fly ash. In this M20 grade of concrete is used as the conventional concrete in compression zone and M25 with the replacement of cement by red mud and flyash with varying percentage (5%, 10% 15%) respectively in the tension zone. The results indicated that the 10% of the red mud and 10% of the fly ash as the optimum value for the concrete beam and by load deflection curve, it is evident that functionally graded concrete beam has more advantages than ordinary concrete since it has more durability and strength characteristics. Scanning electron microscope analysis was also carried out on the red mud functionally graded concrete and fly ash functionally graded concrete. It clearly indicated the pores present in the materials which tends to increase in strength of the concrete.
ABSTRATO A mudanca contínua na forca e outras propriedades, problemas ambientais, aumento no preco do cimento, avanco da indústria da construção civil faz uso de materiais alternativos como materiais de grau funcional (FGM) que leva a um novo material sobre concreto como concreto funcionalmente classificado (FGC), Neste presente artigo, a investigação tem sido realizada no concreto funcionalmente classificado utilizando lama vermelha e também sobre cinzas.Neste grau M20 de concreto é usado como concreto convencional na zona de compressao e M25 com a substituicao de cimento por lama vermelha e flyash com porcentagem variada (5%, 10% ,15%) respectivamente na zona de tensao.Os resultados indicaram que os 10% da lama vermelha e 10% das cinzas de mosca como o valor ideal para o feixe de concreto e pela curva de deflexao de carga, e evidente que o feixe de concreto funcionalmente classificado tem mais vantagens do que o concreto comum, uma vez que possui mais durabilidade e características de resistencia.A análise do microscopio eletronico de varredura também foi realizada no concreto de grau funcional da lama vermelha e cinzas de moscas de concreto funcionalmente classificado.Indicou claramente os poros presentes nos materiais que tendem a aumentar a forca do concreto. |
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ISSN: | 1517-7076 1517-7076 |
DOI: | 10.1590/s1517-707620210001.1213 |