Alternative cements based on alkali-activated red clay brick waste

Robayo, Rafael Andrés; Mulford, Alexandra; Múnera, Jorge O.; Gutiérrez, Ruby Mejía de

doi:10.1016/j.conbuildmat.2016.10.023

Cited by 123 publications

(60 citation statements)

References 21 publications

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“…Exemplary literature reports concerning influence of chemical activators on hybrid cement are presented in Table 2. This type of binding mixtures may be produced not only using fly ash as the main component but also another aluminosilicate materials such as different kinds of slag [103,105,106], red clay brick waste [107], mixture of fly ash and slag [35,105] or other multiple components [105], but such compositions were not discussed in this paper. Moreover, chemical activation has been used not only in the case of binders containing very high volume cement substitutions but also in case of their lower content (e.g.…”

Section: Chemical Activation Of High and Very High Volume Fly Ash-cemmentioning

confidence: 99%

Influence of selected activating methods on hydration processes of mixtures containing high and very high amount of fly ash

Wilińska

Pacewska

2018

J Therm Anal Calorim

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Binders containing fly ash as cement substitute have been used for many years. Typical amount of fly ash in cement composite does not exceed 35% of mass of binder. Replacement of substantial amount of cement mass by fly ash results in retardation of hydration of binder and deterioration of some concrete properties, e.g. delay in setting time and reduction in early compressive strength. These inconveniences may be reduced using proper method of activation. In this paper, possibilities to activate binding mixtures containing high and very high amount of fly ash and low amount of Portland cement were discussed basing on the literature reports as well as on our own research results. Several activating methods were described, such as mechanical activation, exchanging of part of components of binder (cement, fly ash or both of them) by more reactive fine-grained material, chemical activation by the use of alkaline activators as well as combined methods. Possibilities of using these methods were discussed in relation to amount of fly ash introduced as replacement of cement and kind of fly ash used. Usefulness of calorimetry and thermal analysis methods was also presented.

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Section: Chemical Activation Of High and Very High Volume Fly Ash-cemmentioning

confidence: 99%

Influence of selected activating methods on hydration processes of mixtures containing high and very high amount of fly ash

Wilińska

Pacewska

2018

J Therm Anal Calorim

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“…El desarrollo de la resistencia inicial en los morteros basados en MK fue notable en comparación a los sistemas MR, ya que a 1 día de curado se obtuvo más de 7 MPa, lo cual puede atribuirse a la alta reactividad del MK debido a su alto contenido de Al 2 O 3 reactivo y su carácter amorfo a diferencia del RCBW. Los residuos de ladrillos de arcilla roja (RCBW), son materiales que en el proceso de obtención han sido expuestos a altas temperaturas, en ocasiones sin un control apropiado, lo cual, puede ocasionar una disminución en su reactividad (Robayo et al, 2016). Además, cabe resaltar que la disolución de los aluminosilicatos se da con mayor dificultad en solución de KOH que en NaOH, debido a que los iones Na + son más pequeños que los iones K + , lo cual permite establecer fácilmente enlaces con el anión silicato, dando lugar a pequeños oligómeros (Liew et al, 2016), (Xu and Van Deventer, 2000).…”

Section: Propiedades Mecánicas: Resistencia a La Compresión Y Tracciónunclassified

Mortero geopolimérico para uso potencial como recubrimiento en concreto

Oviedo-Sánchez¹,

Gutiérrez²

2019

reveia

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ResumenSe sintetizaron dos morteros geopoliméricos basados en Metacaolín y residuo de ladrillo, modificados con adiciones orgánicas e inorgánicas para ser utilizados como potenciales recubrimientos sobre concretos. Se evaluaron sus propiedades en estado fresco (fluidez, tiempo de fraguado) y en estado endurecido (resistencia a la compresión y tracción, absorción, porosidad y conductividad térmica). Los resultados muestran la viabilidad de producir morteros Clase R1 y R2 en concordancia con la Norma EN 1504-3 en cuanto a las propiedades mecánicas y se evidencia que los sistemas geopoliméricos producidos presentan menor conductividad térmica comparada a los morteros basados en OPC sugiriendo comportamiento tipo aislante. AbstractIn the present study, two geopolimeric mortars based on Metakaolin and brick residue were synthesized; these were modified with organic and inorganic additions to be used as potential coatings on concrete. Properties in a fresh state (fluidity, setting time) and in a hardened state (compressive and traction strength, absorption, porosity and thermal conductivity) were evaluated. The results show the feasibility of producing Class R1 and R2 mortars in accordance with Revista EIA, ISSN 1794-1237 / Año XVI / Volumen 16 / Edición N.31 / Enero-Junio 2019 Publicación semestral de carácter técnico-científico / Universidad EIA, Envigado (Colombia)

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“…In addition, in situ earthworm breeding would be a potential organic fertilizer for orchards, which not only improves fruit quality and yield but also reduces the amount of organic wastes from agriculture as a result of earthworm activity. Robayo et al (2016) presented the feasibility of using red clay brick waste with sodium hydroxide and sodium silicate solution as alkaline activators to develop structural and non-structural construction elements. The results indicated the combination of Portland cement (20%) and sodium silicate yielded a maximum compressive strength of 102.6 MPa at 28 days and 25 °C.…”

Section: Waste Managementmentioning

confidence: 99%

Chemical Waste and Allied Products

Hung¹,

Aziz²,

Zainal³

et al. 2017

Water Environment Research

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This review of literature published in 2016 focuses on waste related to chemical and allied products. The topics covered include waste management, aerobic waste treatment, anaerobic waste treatment, air emission, biological waste treatment, groundwater remediation, water recycle, water analysis, water reuse, soil remediation, sorption, physicochemical treatment, ozonation, and fertilizer waste. Future topics include the pollution effect on the environment, especially, to the ecosystem and human as well as improved treatment processes to alleviate the detrimental effects.

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Alternative cements based on alkali-activated red clay brick waste

Cited by 123 publications

References 21 publications

Influence of selected activating methods on hydration processes of mixtures containing high and very high amount of fly ash

Influence of selected activating methods on hydration processes of mixtures containing high and very high amount of fly ash

Mortero geopolimérico para uso potencial como recubrimiento en concreto

Chemical Waste and Allied Products

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