Pre-treatment of municipal solid waste incineration (MSWI) bottom ash for utilisation in cement mortar

Saikia, Nabajyoti; Mertens, Gilles; Balen, Koen Van; Elsen, Jan; Gerven, Tom Van; Vandecasteele, Carlo

doi:10.1016/j.conbuildmat.2015.07.185

Cited by 121 publications

(43 citation statements)

References 30 publications

(58 reference statements)

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“…Rapid crystallization leads to the formation of bayerite, and slow crystallization leads to the formation of gibbsite [ 53 ]. Elemental Zn present in ash also reacts similarly to generate hydrogen gas and the different stoichiometrical equations of the reactions are given below [ 41 , 54 , 55 , 56 ]

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Section: Beneficiation Needs For Use Of Mswi Ash In Building Matermentioning

confidence: 99%

“…Van Gerven et al studied the effect of carbonation in reducing heavy metal leaching [ 87 , 106 ]. Saikia et al studied the effects of various treatments including heat treatment and treatment with sodium carbonate to curb the harmful effects of elemental aluminum and sulfates [ 41 ]. Arickx et al studied the effect of accelerated carbonation on curbing leaching of heavy metals and identified that around four weeks of accelerated carbonation leads to the Cu leaching being under the limits.…”

Section: Research Regarding Ash Pre-treatment In Belgiummentioning

confidence: 99%

“… Composition of bottom ash from various incinerator facilities (black dots) superimposed on other materials commonly used in construction cf. [ 6 , 28 , 32 , 35 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 ]. …”

Section: Figurementioning

confidence: 99%

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The Use of Municipal Solid Waste Incineration Ash in Various Building Materials: A Belgian Point of View

Snellings²,

et al. 2018

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Huge amounts of waste are being generated, and even though the incineration process reduces the mass and volume of waste to a large extent, massive amounts of residues still remain. On average, out of 1.3 billion tons of municipal solid wastes generated per year, around 130 and 2.1 million tons are incinerated in the world and in Belgium, respectively. Around 400 kT of bottom ash residues are generated in Flanders, out of which only 102 kT are utilized here, and the rest is exported or landfilled due to non-conformity to environmental regulations. Landfilling makes the valuable resources in the residues unavailable and results in more primary raw materials being used, increasing mining and related hazards. Identifying and employing the right pre-treatment technique for the highest value application is the key to attaining a circular economy. We reviewed the present pre-treatment and utilization scenarios in Belgium, and the advancements in research around the world for realization of maximum utilization are reported in this paper. Uses of the material in the cement industry as a binder and cement raw meal replacement are identified as possible effective utilization options for large quantities of bottom ash. Pre-treatment techniques that could facilitate this use are also discussed. With all the research evidence available, there is now a need for combined efforts from incineration and the cement industry for technical and economic optimization of the process flow.

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…”

Section: Beneficiation Needs For Use Of Mswi Ash In Building Matermentioning

confidence: 99%

Section: Research Regarding Ash Pre-treatment In Belgiummentioning

confidence: 99%

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The Use of Municipal Solid Waste Incineration Ash in Various Building Materials: A Belgian Point of View

Snellings²,

et al. 2018

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“…(ALLEGRINI et al, 2014;GARCIA-LODEIRO et al, 2016;LYNN et al, 2016;SAIKIA et al, 2015;SONG et al, 2015;TANG et al, 2015).…”

Section: Resultsunclassified

Evaluation of the Elemental Composition of Municipal Solid Waste Bottom Ash: A New Methodology for Sample Preparation

Tiburcio¹,

Gomez²,

Malpeli³

et al. 2018

R. bras. Ener. Renov.

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The disposal of municipal solid waste (MSW) to thermochemical treatments promotes the formation of ashes as a by-product, which constitutes an important role in the design and operation of energy recovery plants, as the ash can cause corrosion and fouling problems. In this sense, this work analyzed samples of bottom ashes from combustible fractions (organic matter, plastics, textiles, paper/cardboard/Tetra Pak® and sanitary waste) of MSW in natura from Santo André – SP, Brazil. For this, a new methodology for sample preparation was proposed to evaluate the elemental composition of the bottom ashes, for later analysis by Scanning Electron Microscopy with Energy Dispersive X-ray Spectroscopy (SEM-EDS). The obtained data showed a standard deviation of less than 10%, guaranteeing a greater reliability of the results and corroborating with standard deviations presented in the scientific literature. In addition, the elemental composition of the bottom ash was similar between the different combustible fractions evaluated. Keywords: MSW, Combustible fractions, SEM-EDS.

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“…Consequently, it is available to be reused as a secondary building material [17][18][19]. Many studies have strongly stated that MSWI bottom ash has some hydration activity and can be used to manufacture mortar [20,21]. However, the use of MSWI bottom ash to resist sulfate attack on concrete has been rarely reported, and the transportation and crystallization processes of salt solution in concrete remain unknown.…”

Section: Introductionmentioning

confidence: 99%

MSWI Bottom Ash Application to Resist Sulfate Attack on Concrete

et al. 2019

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This research provides a strategy for partially replacing cement with municipal solid waste incineration (MSWI) bottom ash (BA) to improve the performance of concrete against sulphate attack. Mortar strength tests were performed firstly to evaluate the hydration activity of the ground BA. Concrete specimens were cured in standard conditions and immersed in a solution that contained 10% sodium sulfate. Then, the compressive strength of these specimens was measured to investigate the mechanical properties and durability of the concrete. Next, the capillary porosity of the concrete was determined from the volume fractions of water lost in specimens. Finally, the transport of the sulphate solution in concrete was analyzed using capillary rise, crystallization rate, and solution absorption tests. The results indicated that BA had a certain hydration activity. The equivalent replacement of cement by BA decreased the compressive strength of the specimens but increased the durability of the concrete. There was an excellent correlation between capillary rise height, sulfate solution absorption amount, crystallization rate, and coarse capillary porosity. The addition of BA can decrease the coarse capillary porosity and further slow the capillary transport and crystallization of sulfate solution in concrete. Overall, the replacement of cement with BA can improve the durability of concrete and actualize the utilization of MSWI residues as a resource.

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Pre-treatment of municipal solid waste incineration (MSWI) bottom ash for utilisation in cement mortar

Cited by 121 publications

References 30 publications

The Use of Municipal Solid Waste Incineration Ash in Various Building Materials: A Belgian Point of View

The Use of Municipal Solid Waste Incineration Ash in Various Building Materials: A Belgian Point of View

Evaluation of the Elemental Composition of Municipal Solid Waste Bottom Ash: A New Methodology for Sample Preparation

MSWI Bottom Ash Application to Resist Sulfate Attack on Concrete

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