Properties of lightweight aggregate produced by rapid sintering of incinerator bottom ash

Cheeseman, Christopher R.; Makinde, A.; Bethanis, S.

doi:10.1016/j.resconrec.2004.05.004

Cited by 210 publications

(95 citation statements)

References 36 publications

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“…There was very little difference in metal leaching between concrete mixtures B23 and A23, because of both the high metal concentration in the raw waste and the low pH value of the leaching solution. Previous work has shown that higher temperatures and longer dwell times are needed to significantly reduce metal leaching from MSWI BA (Cheeseman et al 2005). Therefore, if it is necessary, the waste plant could employ the process of melting and solidification, thus stabilizing metallic compounds in the 'molecular' structure of the waste product and preventing them from leaching out and dispersing into the surrounding environment.…”

Section: Elastic Modulus Testmentioning

confidence: 99%

“…In addition to this, BA tends to undergo expansive and swelling reactions that are related to the presence of metallic aluminum or aluminum compounds (Müller and Rübner 2006). In order to reduce the secondary environmental pollution, some treatments have been proposed to reduce detrimental reactions (Gerven et al 2005;Ferraris et al 2009;Pera et al 1997;Cheeseman et al 2005;Chang et al 1999).…”

Section: Introductionmentioning

confidence: 99%

“…BA alone has rarely been studied as a raw material in the formulation of cement and concrete. Additionally, BA has often been subjected to expensive treatment such as vitrification (Ferraris et al 2009), dipping in sodium hydroxide (Pera et al 1997), rapid sintering (Cheeseman et al 2005) or refusederived fuel incineration (Chang et al 1999). There have been few studies on the use of washed MSWI BA as the only substitution material.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optimal Use of MSWI Bottom Ash in Concrete

Zhang

Zhao

2014

Int J Concr Struct Mater

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An experimental investigation was carried out to evaluate the mechanical properties of concrete mixtures in which coarse aggregate was partially (30, 50 or 70 %) replaced with pre-washed municipal solid waste incineration (MSWI) bottom ash. Results indicated that bottom ash reduced the compressive strength, elastic modulus, and levels of heavy metals in leachate when used as a replacement for gravel, and that the maximum amount of MSWI bottom ash in concrete should not exceed 50 %. To analyze the effect mechanism of bottom ash in concrete, the degree of hydration and the following pozzolanic reaction characterized by the pozzolanic activity index, and the porosity distribution in cement mortar. The study indicates that improved properties of concrete are not solely later strength gain and reduced levels of heavy metals in leachate but also the progression of pozzolanic reactions, where a dense structure contains a higher proportion of fine pores that are related to durability.

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Section: Elastic Modulus Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimal Use of MSWI Bottom Ash in Concrete

Zhang

Zhao

2014

Int J Concr Struct Mater

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“…Different types of raw materials of natural and artificial origin are used for the production of lightweight aggregates (LWA) [1][2][3][4][5]. The chemical composition of the raw material determines the bloating (expansion) behaviour and the properties of the product [6].…”

Section: Introductionmentioning

confidence: 99%

The effect of additives on the properties of lightweight aggregates produced from clay

Bernhardt

Justnes

Tellesbø³

et al. 2014

Cement and Concrete Composites

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In an attempt to improve the properties, lightweight aggregates were produced from clay with the addition of Na 2 CO 3 , SiO 2 , Fe 2 O 3 , and Fe in quantities between 2 and 10 wt% and examined with respect to strength, density and expansion behaviour. The additives were mixed into dry clay powder, water was added and pellets were formed by hand and fired at 1120°C in a chamber furnace. Particle densities of the products ranged from 0.31-0.57 g/cm 3 , porosities from 78-89% and the solid strength from 0,54-1,58 MPa. The addition of Na 2 CO 3 proved to decrease the viscosity of the glass phase at the surface of the pellets but resulted in a 2 reduced expansion, irregular shape and pellets sticking together. SiO 2 addition did not give any major change in properties. The addition of Fe 2 O 3 increased the pore size in the centre of the pellets, however with insignificant change in strength and density. Adding 5 wt% metallic iron powder led to LWA pellets with increased porosity, reduced density, larger pores and low mechanical strength and could be an useful additive in applications where low density is more important than strength.

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“…After sintering, only trace amounts of HMs were detected in the products. However, Cheeseman et al (2005) has shown that, under acid conditions and at relatively low sintering temperatures, there are very little differences in metal leaching between raw materials and sintered product. Therefore, the leaching evaluation of products such as LWAs manufactured with waste potentially contaminated by HMs should be performed under a wide range of conditions (low pH, changes in redox potential, etc).…”

Section: Introductionmentioning

confidence: 99%

Heavy metal chemical fractionation and immobilization in lightweight aggregates produced from mining and industrial waste

Corrochano

Alonso-Azcárate

González

2011

Int. J. Environ. Sci. Technol.

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ABSTRACT:The fractionation of five heavy metals in a washing aggregate sludge, a sewage sludge, a clay-rich sediment, the mixtures of these materials and the lightweight aggregates manufactured with them has been determined by applying the optimized European Community Bureau of Reference sequential extraction procedure in order to evaluate the effects of the heating process on the extraction of these elements. Additionally, preparation of eluates by aggregate leaching has been performed in accordance with the UNE-EN-1744-3 standard. The availability of all the studied heavy metals has been reduced by the thermal treatment, since most of the heavy metals have become part of the undigested material in the lightweight aggregates. Nickel has been the heavy metal that has presented the highest concentration in the eluates obtained after completion of the single extraction procedure in the lightweight aggregates. The studied lightweight aggregates may be used in lightweight concrete manufacturing from the standpoint of heavy metal leaching.

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Properties of lightweight aggregate produced by rapid sintering of incinerator bottom ash

Cited by 210 publications

References 36 publications

Optimal Use of MSWI Bottom Ash in Concrete

Optimal Use of MSWI Bottom Ash in Concrete

The effect of additives on the properties of lightweight aggregates produced from clay

Heavy metal chemical fractionation and immobilization in lightweight aggregates produced from mining and industrial waste

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