Manufacturing of lightweight aggregates with carbon fiber and mineral wastes

Moreno-Maroto, José Manuel; González-Corrochano, Beatríz; Alonso-Azcárate, Jacinto; Rodríguez, Luis Carbajal; Acosta, Anselmo

doi:10.1016/j.cemconcomp.2017.08.001

Cited by 49 publications

(30 citation statements)

References 44 publications

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“…Artificial lightweight aggregate materials on the market are mainly produced by sintering in a rotary kiln using slate or shale. Recently, many studies have focused on various types of solid waste such as plastic waste [1], sewage sludge [2], coal-fired power plant ash [3,4], drill cuttings [5], mining tailings [6] or carbon fiber mineral waste [7].…”

Section: Introductionmentioning

confidence: 99%

Optimum Bloating-Activation Zone of Artificial Lightweight Aggregate by Dynamic Parameters

Wie¹,

Lee²

2019

Materials

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The purpose of this study is to compare the bloating mechanism of artificial lightweight aggregate under sintering and rapid sintering conditions to identify the factors behind the bloating of the lightweight aggregate under these sintering conditions, and to find suitable temperature ramping conditions. The aggregate had an average particle size of 10 mm as formed using acid clay, and it was fired by a rapid sintering method and a normal sintering method. The bulk density and water absorption ratio of the specimen were measured, and the cross section was observed. No black core was observed under the rapid sintering condition, and it was lightened at an inflection point of 1150 °C. A reduction in the bulk density was observed in a shorter period of time when the input temperature was high under the normal sintering conditions. Regardless of the input temperature, the bulk density change was divided into three sections and a bloating-activation zone was observed in which the density abruptly decreased.

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Section: Introductionmentioning

confidence: 99%

Optimum Bloating-Activation Zone of Artificial Lightweight Aggregate by Dynamic Parameters

Wie¹,

Lee²

2019

Materials

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“…tennis racquets, skis, high jump poles etc. Its light and flexible yet strong boosting performances give the object desired strength and flexibility suitable for its function [17,18]. The properties of carbon filler like high stiffness, firmness, low weight-density-to-volume ration, high reliability, better chemical resistance, heat tolerance and low coefficient of thermal expansion make it usable in construction and building components, products in industrial, military, sports and others [19,20].…”

Section: Methodsmentioning

confidence: 99%

Mechanical behaviour of graphene and carbon fibre reinforced epoxy based hybrid nanocomposites for orthotic callipers

Kumari

Kumar

2018

Journal of Experimental Nanoscience

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The current analysis examines the efficiency of a composite with polymer matrix reinforced with carbon fibre and graphene at the micro and nano level respectively as an alternative material for aluminium components of Orthotic callipers. An attempt has been made to use both the carbon fibre and graphene as hybrid reinforcement with the matrix as epoxy resin. The addition of graphene and carbon fibre was 2% and 10% respectively by weight of epoxy. Dispersion of graphene was carried out using an ultrasonic sonicator and carbon fibres were a reinforced using hand lay-up technique. The total fabrication was carried out under vacuum to ensure void-free test samples. The samples were tested under tension and 3 Point Bending condition to estimate the Tensile and Flexural properties, under permissible load and deflection criteria. The results found were then compared with presently used material for orthotic callipers extensively used by amputees suffering from the locomotive, gait issues, and polioaffected survivors. The proposed composite showed higher strength, lower deformation and higher stiffness with a lower weight-to-volume ratio as compared to presently used material, i.e. aluminium.

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“…Já o RGM apresenta uma perda de massa a 1000°C de 29%, onde a principal perda de massa está associada a um evento endotérmico a 741°C. Suas curvas TG e DTA são bastante similares ao apresentado por MORENO-MAROTO et al [8] que também utilizou RGM e suas curvas apresentam uma grande perda de massa associada a um evento endotérmico a 708°C que foi associado a decomposição da calcita em CO 2 .…”

Section: Figuraunclassified

“…O uso de RGM em conjunto com argila e adição de resíduos de fibras de carbono ou com rejeitos plásticos também foi estudado [7,8], e, após avaliação do tempo e temperatura nos fornos para produção de agregados leves verificou-se a necessidade de inclusão de aditivos das fibras de carbono ou rejeitos plásticos para a produção de agregados leves com características adequadas, pois, agregados produzidos com apenas a base mineral (RGM + argila) diminuíram de volume com o aumento da temperatura e o tempo de exposição, produzindo agregados de densidade pesada.…”

Section: Introductionunclassified

Desenvolvimento de agregados leves a partir de resíduo de corte de pedras ornamentais (granitos e mármores) e argila

et al. 2020

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RESUMO Agregados leves são materiais granulares com estrutura porosa utilizados como isolantes térmico e acústico, decoração em paisagismos, na produção de enchimentos leves, em obras de drenagem, de aterros leves e de infraestrutura, além do uso para cultura hidropônica. Fabricados a partir de precursores argilosos, sinterizados a altas temperaturas, que se expandem devido a uma fase vítrea capturar os gases gerados, sendo os teores de fundentes e substâncias formadoras de gases, fatores intervenientes do processo. Nesse contexto verificou-se a possibilidade de utilização de resíduo de corte de granitos e mármores (RGM) e argila com objetivo de desenvolver agregados leves. Os precursores foram caracterizados quanto a área superficial (BET), granulometria a laser, finura, massas específica e unitária além das análises térmica (DTA/TG), química (FRX) e mineralógica (DRX). Foram produzidos agregados com teores de 0, 50, 60, 70, 80, 90 e 100% de RGM, submetendo-os à sinterização em temperaturas de 1000°C a 1263°C em forno mufla. As misturas sinterizadas foram analisadas por sua massa específica aparente, absorção de água, massa unitária, módulo de deformação dos agregados leves, índice de inchaço, perda de massa, índice de encolhimento na secagem, análise visual, resistência à tração e morfologia por microscopia eletrônica de varredura (MEV). Após sinterização obteve-se agregados com massa específica aparente inferiores a 2,00g/cm³, absorção de água inferior a 20% e massa unitária inferior a 0,88g/cm³, valores estes definidos como requisitos para classificar um agregado como leve e de qualidade para utilização em concretos estruturais. Quanto as propriedades destacadas, foi possível desenvolver agregados leves com alto teor de resíduo que atendem aos requisitos normativos, respectivamente com valores de 1,56g/cm³, 8% e 0,85g/cm³, além de agregados leves apresentando resistência à tração 4 vezes superior em relação ao agregado leve comercial.

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Manufacturing of lightweight aggregates with carbon fiber and mineral wastes

Cited by 49 publications

References 44 publications

Optimum Bloating-Activation Zone of Artificial Lightweight Aggregate by Dynamic Parameters

Optimum Bloating-Activation Zone of Artificial Lightweight Aggregate by Dynamic Parameters

Mechanical behaviour of graphene and carbon fibre reinforced epoxy based hybrid nanocomposites for orthotic callipers

Desenvolvimento de agregados leves a partir de resíduo de corte de pedras ornamentais (granitos e mármores) e argila

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