Production of lightweight aggregates from mining and industrial wastes

González-Corrochano, Beatríz; Alonso-Azcárate, Jacinto; Rodas, M.

doi:10.1016/j.jenvman.2009.03.009

Cited by 102 publications

(58 citation statements)

References 32 publications

(42 reference statements)

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“…Eight types of LWAs from a previous work [14]. with four different initial compositions, were selected for the study of their microstructure and mineralogical composition.…”

Section: Methodsmentioning

confidence: 99%

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Microstructure and mineralogy of lightweight aggregates manufactured from mining and industrial wastes

González-Corrochano

Alonso-Azcárate

Rodas

et al. 2011

Construction and Building Materials

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Keywords:Lightweight aggregate Microstructure MineralogyThe microstructure and mineralogy of lightweight aggregates manufactured with washing aggregate sludge, sewage sludge and a clay-rich sediment have been studied. The mineralogical analysis revealed the neo-formation of plagioclase and pyroxene group minerals and a minor presence of gehlenite. Some relationships may be established: (i) heating temperature and dwell time affect the formation of new porosity; (ii) the disappearance of pyroxenes could produce changes in the density of the solid material in the lightweight aggregates; (Hi) when an external glassy film is not present, water absorption values depend on the size and number of each type of pore.Washing aggregate sludge Sewage sludge Clay-rich sediment

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“…Eight types of LWAs from a previous work [14]. with four different initial compositions, were selected for the study of their microstructure and mineralogical composition.…”

Section: Methodsmentioning

confidence: 99%

“…The first part has been previously published [14]. Here, we describe the microstructure and the mineralogy of various artificial lightweight aggregates produced by the pelletizing and sintering of washing aggregate sludge (W), sewage sludge (SS) and a clay-rich sediment (C).…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mineralogy of lightweight aggregates manufactured from mining and industrial wastes

González-Corrochano

Alonso-Azcárate

Rodas

et al. 2011

Construction and Building Materials

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“…LOI values of W75S25 and W50S50 have been 24.26 % and 10.68 %, respectively (González Corrochano et al, 2009).…”

Section: Optimized Bcr Sequential Extraction Procedures (Bcr-sep)mentioning

confidence: 98%

“…Two types of artificial LWAs resulting from a previous study (González Corrochano et al, 2009) (González Corrochano et al, 2011). The chemical fractionation of W, SS, C and the mixtures has been also tested.…”

Section: Studied Samplesmentioning

confidence: 99%

“…This work is a part of a more general research project. The first part has been previously reported (González-Corrochano et al, 2009) and describes the manufacturing process of artificial lightweight aggregates by pelletizing and sintering of washing aggregate sludge (W), sewage sludge (SS) and a clay-rich sediment (C). It also shows the chemical and physical properties of the raw materials and products.…”

Section: Introductionmentioning

confidence: 99%

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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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Lightweight Aggregates from Masonry Rubble

Müller

Schnell

Rübner

2012

Chemie Ingenieur Technik

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Heterogene und feinkörnige Bauabfälle aus Mauerwerkbruch lassen sich heute nur auf einem sehr geringen Qualitätsniveau verwerten. Um diese Situation zu überwinden, wurde das Material als Rohstoff für die Herstellung von leichten Gesteinskörnungen verwendet, die ähnlich wie Blähtone und Blähschiefer in einem thermischen Prozess erzeugt werden. Auf der Grundlage einer Literaturübersicht wurde zunächst die grundsätzliche Eignung von Mauerwerkbruch bewertet. Es folgten experimentelle Untersuchungen, in welchen nachgewiesen werden konnte, dass Leichtgranulate mit definierten, einstellbaren Eigenschaften aus Mauerwerkbruch herstellbar sind. Sie sind in ihren Eigenschaften den leichten Gesteinskörnungen aus natürlichen Rohstoffen mindestens ebenbürtig.

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Production of lightweight aggregates from mining and industrial wastes

Cited by 102 publications

References 32 publications

Microstructure and mineralogy of lightweight aggregates manufactured from mining and industrial wastes

Microstructure and mineralogy of lightweight aggregates manufactured from mining and industrial wastes

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

Lightweight Aggregates from Masonry Rubble

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