Properties of Portland cement — stabilised MSWI fly ashes

Polettini, Alessandra; Pomi, Raffaella; Sirini, Piero; Testa, Fabrizio

doi:10.1016/s0304-3894(01)00292-8

Cited by 114 publications

(56 citation statements)

References 6 publications

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“…The semi-dry process used in the gas treatment is highly alkaline due to the lime grout added to neutralize the gases coming from the combustion chamber (Chimenos et al, 2005). High alkalinity promotes the leaching of strongly amphoteric heavy metals, such as lead and zinc (Polettini et al, 2001). …”

Section: Methodsmentioning

confidence: 99%

“…Promising results were obtained owing of the high ash content, which provided a longer setting time and chemical immobilisation of some heavy metals. This indicates that there is a strong potential for the use of these mixtures in non-structural concrete as a result of the suitable compressive strength values and the retainer properties observed (Collivignarelli et al, 2002;Lampris et al, 2009;Pan et al, 2008;Polettini et al, 2001;Sorlini et al, 2011).…”

Section: Introductionmentioning

confidence: 93%

“…The former (BA) is classified as non-hazardous waste by the European Waste Catalogue and Catalan legislation, as it is typically rich in calcium oxide and silica with minimum amounts of heavy metals. Consequently, it is available to be reused as secondary building material (Chimenos et al, 2003;Fernández Bertos et al, 2003;Polettini et al, 2001). On the other hand, APC fly ash is classified as hazardous waste, owing to its high contents of heavy metals, soluble salts, chlorinated organic compounds, and lime from the air pollution treatment process (Polettini et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

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Aggregate material formulated with MSWI bottom ash and APC fly ash for use as secondary building material

et al. 2013

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The main goal of this paper is to obtain a granular material formulated with Municipal Solid Waste Incineration (MSWI) bottom ash (BA) and air pollution control (APC) fly ash to be used as secondary building material. Previously, an optimum concrete mixture using both MSWI residues as aggregates was formulated. A compromise between the environmental behaviour and the economy of the process was considered. Unconfined compressive strength and abrasion resistance values were measured in order to evaluate the mechanical properties. From these results, the granular mixture was not suited for certain applications owing to the high BA/APC fly ash content and low cement percentages used to reduce the costs of the final product.Nevertheless, the leaching test performed showed that the concentrations of all heavy metals were below the limits established by the current Catalan legislation for their reutilization. Therefore, the material studied might be mainly used in embankments, where high mechanical properties are not needed and environmental safety is assured.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

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Aggregate material formulated with MSWI bottom ash and APC fly ash for use as secondary building material

et al. 2013

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“…The studies by Polettini et al (2001) and Aubert et al (2006), have shown that cement maintains its mechanical strength with a maximum addition of 20% of MSWI fly ash. Studies performed by Juric et al (2006), determined that for the preparation of concrete showing 40 MPa of compressive strength, it is acceptable to replace up to 15% of cement by MSWI fly ash, as they have resulted that at 28 days, flexural strength and compression strength show only a linearly decreased of 0.03 and 0.02 MPa respectively for each 1% increase in weight of the fly ash dosage of slags.…”

Section: Introductionmentioning

confidence: 99%

Comportamiento mecánico y frente a corrosión de mortero y hormigón armado fabricado con escorias de incineradora de residuos sólidos urbanos

Ávila

Medina

Bastidas³

2017

REVMETAL

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ABSTRACT:Electrochemical monitoring was performed to evaluate the influence of municipal solid waste incineration residues (MSWI) made concrete, on reinforcement corrosion, using four different steel reinforcements grades, traditional carbon steel B-500-SD and three stainless steels, the austenite AISI 304, duplex AISI 2304, and lean-duplex AISI 2001, embedded in mortars manufactured using bottom ash as aggregates from the incineration of municipal solid waste (MSW), in partial and total substitution of natural aggregate. In addition, it has been studied the mechanical behaviour of the mortar and concrete matrix in the presence of MSWI aggregates. The use of MSWI bottom ash as an aggregate, results in a notable improvement of the resistance characteristics of conventional mortar and concrete, made out only of natural aggregate. Moreover, electrochemical measures show that the steels remain in passive state throughout all the exposure period (3 years). RESUMEN:Comportamiento mecánico y frente a corrosión de mortero y hormigón armado fabricado con escorias de incineradora de residuos sólidos urbanos. Se ha evaluado mediante monitorización electroquímicas la influencia de la utilización de escorias procedentes de incineradoras municipales de residuos sólidos urbanos (RSU), en la corrosión de muestras de hormigón armado, utilizando para ello cuatro aceros corrugados, el tradicional acero al carbono B-500-SD y tres aceros inoxidables: el austenítico AISI 304 (EN 1.4301), el dúplex AISI 2304 (EN 1.4362) y el dúplex de bajo contenido en níquel AISI 2001 (EN 1.4482), embebidos en morteros elaborados sólo con escorias como sustituto del árido. Además, se ha estudiado el comportamiento mecánico de morteros y hormigones de cemento Portland elaborados con escorias, procedentes de la incineración de residuos sólidos urbanos, en muestras elaboradas con sustitución total o parcial del árido natural por escoria de RSU. De los resultados obtenidos se deduce que la utilización como árido de las escorias procedentes de la incineración de RSU, mejoran sensiblemente las características de resistencia del convencional mortero y hormigón elaborados sólo con árido natural. En cuanto al estudio de corrosión de las armaduras, las mediciones electroquímicas demuestran que los aceros permanecen en estado pasivo durante todo el periodo estudiado (3 años).

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“…Solidification and stabilization technology are keys to solving the problem of poisonous and hazardous waste. Solidification consists of cement solidification and asphalt solidification (Jiang et al, 2009;Polettini et al, 2001;Santanu and Pak, 2006;Sawada et al, 2001). This method is technically mature, easily performed, and entails low costs.…”

Section: Introductionmentioning

confidence: 99%

Immobilization and volume reduction of heavy metals in municipal solid waste fly ash using nano-size calcium and iron-dispersed reagent

Mallampati

Mitoma

Simion

et al. 2015

Journal of the Air & Waste Management Association

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Properties of Portland cement — stabilised MSWI fly ashes

Cited by 114 publications

References 6 publications

Aggregate material formulated with MSWI bottom ash and APC fly ash for use as secondary building material

Aggregate material formulated with MSWI bottom ash and APC fly ash for use as secondary building material

Comportamiento mecánico y frente a corrosión de mortero y hormigón armado fabricado con escorias de incineradora de residuos sólidos urbanos

Immobilization and volume reduction of heavy metals in municipal solid waste fly ash using nano-size calcium and iron-dispersed reagent

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