Use of municipal solid waste incineration fly ash in concrete

Aubert, Jean‐Emmanuel; Husson, Bernard; Vaquier, A

doi:10.1016/j.cemconres.2003.11.002

Cited by 141 publications

(78 citation statements)

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“…In both cases the bottom ash reduced the concrete strength. Similar behavior observed authors of papers [2] and [3]. Generally may be stated that the bottom ash cause the strength decrease due to content of metallic aluminium particles which induce in alkaline environment the hydrogen evolution [4].…”

Section: Introductionsupporting

confidence: 75%

Environmental friendly concrete production using municipal solid waste incineration materials

Pavlík¹,

Keppert²,

Pavlíková³

et al. 2011

Management of Natural Resources, Sustainable Development and Ecological Hazards III

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The building industry, especially construction materials' production, is a major user of the world's resources and together with energy production one of the most important sources of the CO 2 production. Among building materials, concrete is element which is the second most consumed substance in the world, whereas only water is used in greater quantities. Apparently, almost one ton of concrete is used for each person in the world each year. From the point of view of ecological and sustainable aspects, concrete industry is now recognized as the largest consumer of natural resources and significant producer of waste. In order to preserve clean environment, there is a need for improvement of existing production technologies of concrete by transforming them into sustainable and environmentally friendly. Municipal solid waste incineration (MSWI) materials as fly ashes and bottom ashes have not dissimilar average chemical composition from that of coal fly ashes and slag from iron production. On that account one can assume possible use of MSWI materials as partial Portland cement replacement in concrete mix design or in a raw state as partial aggregate replacement. Since waste treatment represents serious problem for advanced as well as for developing countries, the use of MSWI materials in concrete production is beneficial for both ecological and financial reasons.Three kinds of MSWI fly ashes in state "as received" were characterized and their potential use as filler in cement based mortars was tested. The motivation of this utilization was to replace part of the fine aggregate dose in the mortars. All tested ashes made the mortars properties worse; the reasons and possible solutions are discussed.

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Section: Introductionsupporting

confidence: 75%

Environmental friendly concrete production using municipal solid waste incineration materials

Pavlík¹,

Keppert²,

Pavlíková³

et al. 2011

Management of Natural Resources, Sustainable Development and Ecological Hazards III

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“…From mechanical and durable points of view, the ash incorporated in the concrete behaves similarly to ordinary sand. The leaching testes show that the process makes it possible to obtain materials without major risks for the environment Aubert et al (2004) Aggregates for concrete FA A washing pre-treatment was applied to FA for removing sulfates and chlorides (L/ S = 10, mixing during 20-30 min, settling for 24 h, filtration and drying solids at 105°C for 24 h). In the S/S treatment, cement, lime, sodium silicate, bentonite, blast-furnace slag, and water dosage of 30-40% was used, and involves homogenization during 15 min and a curing phase during 15-20 days.…”

Section: Discussionmentioning

confidence: 99%

Treatment and use of air pollution control residues from MSW incineration: An overview

Bordado²,

2008

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This work reviews strategies for the management of municipal solid waste incineration (MSWI) residues, particularly solid particles collected from flue gases. These tiny particles may be retained by different equipment, with or without additives (lime, activated carbon, etc.), and depending on the different possible combinations, their properties may vary. In industrial plants, the most commonly used equipment for heat recovery and the cleaning of gas emissions are: heat recovery devices (boiler, superheater and economiser); dry, semidry or wet scrubbers; electrostatic precipitators; bag filters; fabric filters, and cyclones. In accordance with the stringent regulations in force in developed countries, these residues are considered hazardous, and therefore must be treated before being disposed of in landfills. Nowadays, research is being conducted into specific applications for these residues in order to prevent landfill practices. There are basically two possible ways of handling these residues: landfill after adequate treatment or recycling as a secondary material. The different types of treatment may be grouped into three categories: separation processes, solidification/stabilization, and thermal methods. These residues generally have limited applications, mainly due to the fact that they tend to contain large quantities of soluble salts (NaCl, KCl, calcium compounds), significant amounts of toxic heavy metals (Pb, Zn, Cr, Cu, Ni, Cd) in forms that may easily leach out, and trace quantities of very toxic organic compounds (dioxin, furans). The most promising materials for recycling this residue are ceramics and glass-ceramic materials.The main purpose of the present paper is to review the published literature in this field. A range of studies have been summarized in a series of tables focusing upon management strategies used in various countries, waste composition, treatment processes and possible applications.

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“…As cinzas de fundo já foram investigadas quanto ao seu uso potencial como agregado em concreto 3,4 e em mistura para asfalto 5 . Atualmente, a possibilidade de reutilização das cinzas volantes na construção civil também tem sido cogitada 6,7 , porém, em conseqüência de suas características químicas, com mais cautela.…”

Section: Introductionunclassified

Caracterização das cinzas de incineração de resíduos industriais e de serviços de saúde

Silva¹,

Lange²

2008

Quím. Nova

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Three ash samples from an incinerator in Belo Horizonte (Brazil) were physically and chemically characterized. The chemical composition of the ashes was not always the same, neither in terms of the chemical species nor in terms of the quantities of those that are common to the three ashes. The ashes called CF1 and CF3D contain heavy metals above the detection limits of the analytical methods and the zinc concentration is high enough to justify treatment of the ashes. For these ashes, a high loss on ignition was found, indicating that the process of incineration might present failures.Keywords: fly ash; bottom ash; waste characterization. INTRODUÇÃOOs resíduos sólidos industriais (RSI) e os resíduos de serviços de saúde (RSS), devido às suas características tóxicas e/ou patogênicas, constituem um grande problema para a sociedade e para o meio ambiente. O aumento da preocupação mundial com relação a esse tema tem levado várias nações a reverem suas legislações, tendendo essas a se tornarem cada vez mais restritivas. O cerco tem se fechado principalmente em torno dos geradores, que passam a ser responsabilizados pelos resíduos que produzem, sendo obrigados a destiná-los de forma adequada.Internacionalmente, a incineração tem sido um dos tratamentos preferenciais para os RSI e RSS, sendo utilizada também no caso dos resíduos domésticos. No Brasil, ainda é pouco difundida, devido ao seu custo elevado, sendo os RSI muitas vezes mandados a aterros classe I, enquanto que os RSS são dispostos em celas especiais de aterros sanitários comuns. No entanto, com a diminuição do espaço nacional para construção desses aterros e com o fim da vida útil dos existentes, esta técnica passará a ser uma escolha muito mais viável do que é hoje em dia.A incineração gera outros resíduos como cinzas de fundo, aquelas que permanecem no fundo da caldeira, e cinzas volantes, materiais coletados pelos equipamentos de controle da poluição atmosférica. Na Europa, as cinzas de fundo são, normalmente, classificadas como resíduos classe II e as cinzas volantes, como classe I. Os principais contaminantes das cinzas volantes são os metais pesados e alguns sais que requerem gerenciamento seguro 1 , além de compostos orgânicos clorados 2 . Esses resíduos são em alguns casos dispostos em aterros, mas suas características podem exigir cuidados especiais.Como alternativa ao aterramento, vem aumentando o interesse na incorporação das cinzas em materiais para aplicações em construção. As cinzas de fundo já foram investigadas quanto ao seu uso potencial como agregado em concreto 3,4 e em mistura para asfal-. Atualmente, a possibilidade de reutilização das cinzas volantes na construção civil também tem sido cogitada 6,7 , porém, em conseqüência de suas características químicas, com mais cautela.O uso do processo de solidificação/estabilização em cimento Tem sido estudado como uma opção de tratamento viável para as cinzas de incineração 1,8,9 . Esta tecnologia é barata e fácil de aplicar, entretanto, cada caso particular deve ser analisado cuidadosamente, pois...

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Use of municipal solid waste incineration fly ash in concrete

Cited by 141 publications

References 1 publication

Environmental friendly concrete production using municipal solid waste incineration materials

Environmental friendly concrete production using municipal solid waste incineration materials

Treatment and use of air pollution control residues from MSW incineration: An overview

Caracterização das cinzas de incineração de resíduos industriais e de serviços de saúde

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