Valorization of washing aggregate sludge and sewage sludge for lightweight aggregates production

González-Corrochano, Beatríz; Alonso-Azcárate, Jacinto; Rodríguez, Luis Carbajal; Lorenzo, Agripino Pérez; Torío, María Fernández; Ramos, Juan José Tejado; Corvinos, María Dolores; Muro, Carlos

doi:10.1016/j.conbuildmat.2016.04.095

Cited by 63 publications

(23 citation statements)

References 34 publications

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“…As shown in Table 1, heavy metals can be found in the biological SS and therefore in BS. Many authors investigated the effects of heavy metals on cement properties (Espinosa and Ten orio, 2000;Gineys et al, 2011;Stephan et al, 1999). For instance, Gineys et al (2011) explored the maximum amount of Cu, Ni, Sn, and Zn that could be incorporated in a laboratory clinker and found the following threshold limits: 0.35% of Cu, 0.5% of Ni, 1% of Sn and 0.7% for Zn.…”

Section: Properties Biosolids [Wt%]mentioning

confidence: 99%

Biosolids: What are the different types of reuse?

Collivignarelli

Canato

Abbà

et al. 2019

Journal of Cleaner Production

150

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Section: Properties Biosolids [Wt%]mentioning

confidence: 99%

Biosolids: What are the different types of reuse?

Collivignarelli

Canato

Abbà

et al. 2019

Journal of Cleaner Production

150

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“…They may have compositions suitable for incorporation into brick manufacture or cement production. Together with González-Corrochano et al [18], they prove that finer portions may also be suitable for the production of manufactured (light-weight) aggregates. This paper is aimed on proving the application of mechanically treated (ground) FA for production of FA-based geopolymer.…”

mentioning

confidence: 64%

Basic Physical – Mechanical Properties of Geopolymers Depending on the Content of Ground Fly Ash and Fines of Sludge

Sičáková

Števulová

2017

Selected Scientific Papers - Journal of Civil Engineering

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The binding potential of fly ash (FA) as a typical basic component of building mixtures can be improved in mechanical way, which unfolds new possibilities of its utilization. This paper presents the possibilities of preparing the geopolymer mixtures based on ground (d m = 31.0 µm) FA, used in varying percentages to the original (unground; d m = 74.1 µm) one. As a modification, fine-grain sludge from the process of washing the crushed aggregates was used as filler in order to obtain mortar-type material. The basic physical-mechanical properties of mixtures are presented and discussed in the paper, focusing on time dependence. The following standard tests were executed after 2, 7, 28, and 120 days: density, total water absorption, flexural strength, and compressive strength. Ground FA provided for positive effect in all tested parameters, while incorporation of fine portion of sludge into the geopolymer mixture does not offer a significant technical profit. On the other hand, it does not cause the decline in the properties, so the environmental effect (reduction of environmental burden) can be applied through its incorporation into the geopolymer mixtures.

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“…Forsterite has a poor resistance to thermal shock and if this phase is neo-formed, the internal stresses during cooling can lead to micro-cracks that reduces compressive strength. Conversely, neo-formed mullite, the main product of illitic and kaolinitic clay thermal decomposition, has been associated with strength development [48].…”

Section: Mineralogy Of Clay Lwamentioning

confidence: 99%

Use of clay in the manufacture of lightweight aggregate

Ayati

Ferrándiz-Mas

Newport

et al. 2018

Construction and Building Materials

124

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Clay is used as a raw material for the production of lightweight aggregates because it is readily processed into suitable granules and forms low-density but high strength aggregate particles when sintered at relatively low temperatures. The use of waste clay generated by major infrastructure development projects to make lightweight aggregate has a positive environmental impact and contributes towards a more circular economy. This paper reviews the manufacturing process used to produce lightweight aggregates from clay and the influence of processing conditions on properties. It also reviews secondary materials that have been incorporated into clays to produce lightweight aggregates. Additional research is required to improve understanding of the effects of composition and production parameters on the pore structure, density, water adsorption and strength of clay derived lightweight aggregates.

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Valorization of washing aggregate sludge and sewage sludge for lightweight aggregates production

Cited by 63 publications

References 34 publications

Biosolids: What are the different types of reuse?

Biosolids: What are the different types of reuse?

Basic Physical – Mechanical Properties of Geopolymers Depending on the Content of Ground Fly Ash and Fines of Sludge

Use of clay in the manufacture of lightweight aggregate

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