Properties of masonry mortars manufactured with fine recycled concrete aggregates

Ledesma, Enrique; Jiménez, José Ramón; Fernández, José Antonio Fernández; Galvín, Adela P.; Barbudo, Auxi

doi:10.1016/j.conbuildmat.2014.08.080

Cited by 95 publications

(56 citation statements)

References 37 publications

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“…The maximum losses observed by Neno et al (19) and in this study were similar (9.0% vs. 8.7%). Ledesma et al (20) found slight increases with replacement ratios of up to 10% and decreases with replacement ratios of up to 20%. For the same reason given for the fresh bulk density, a maximum replacement ratio of 100% can be proposed for masonry mortar production.…”

Section: Dry Bulk Density Of 28-day Hardened Mortarmentioning

confidence: 99%

“…Ledesma et al (20) described in detail the reasons for these differences. The most significant reason is that Neno et al (19) used fine RCA from selected concrete blocks (class 30/37) manufactured in the laboratory and crushed at early ages; therefore, the amount of non-hydrated cement was probably higher than in the recycled aggregates used in this study.…”

Section: Compressive Strength Of Hardened Mortarmentioning

confidence: 99%

“…However, few authors have studied the effect of the incorporation of fine RCA on this property. Ledesma et al (20) found a maximum loss on the workability of 57.5%, using a replacement ratio of fine RCA of 40%. In a previous work, Jiménez et al (16) found a maximum loss of 55% with the same replacement ratio, but in this case using ceramic masonry aggregates.…”

Section: Workabilitymentioning

confidence: 99%

See 2 more Smart Citations

A proposal for the maximum use of recycled concrete sand in masonry mortar design

Ledesma¹,

Jiménez²,

Ayuso³

et al. 2016

Mater. construcc.

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Natural sand mining from rivers and seashores is causing serious environmental problems in many parts of the world, whereas the fine fraction from recycling concrete waste is underutilized as a construction material. The aim of this paper is to determine the maximum replacement level of natural sand by recycled sand in the manufacturing of masonry mortar (M-10). For this purpose, five replacement levels were tested: 0%, 25%, 50%, 75% and 100% by volume. The mixes were made using cement CEM II/BL 32.5 N in a volumetric proportion of cement-to-aggregate of 1:5. A commercial admixture was used at a constant content. The amount of water was variable to achieve a consistency of 175±10 mm. The short-and long-term mortar properties were evaluated. The data were analyzed using a one-way ANOVA. In conclusion, a maximum percentage of 50% recycled concrete sand can be used in an indoor environment. RESUMEN: Propuesta de máximo uso de arena reciclada de hormigón en el diseño de morteros de albañilería.La extracción de arena natural de ríos y costas está provocando graves problemas ambientales en muchas partes del mundo, mientras que la fracción fina de los áridos reciclados de residuos de hormigón está infrautilizada como material de construcción. El objetivo de este artículo es determinar el máximo porcentaje de sustitución de arena natural por arena reciclada en la fabricación de morteros M-10. Cinco niveles de sustitución en volumen fueron ensayados: 0%, 25%, 50%, 75% y 100%. Las mezclas fueron hechas con cemento CEM II/BL 32,5 N en una relación volumétrica cemento-árido de 1:5. Se utilizó un aditivo comercial a dosis constante. El agua se ajustó experimentalmente para conseguir una consistencia de 175±10 mm. Se evaluaron las propiedades de los morteros a corto y largo plazo. Los datos se analizaron mediante una ANOVA-simple. En conclusión, un porcentaje máximo del 50% de arena reciclada de hormigón puede usarse en interiores.

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Section: Dry Bulk Density Of 28-day Hardened Mortarmentioning

confidence: 99%

Section: Compressive Strength Of Hardened Mortarmentioning

confidence: 99%

Section: Workabilitymentioning

confidence: 99%

See 1 more Smart Citation

A proposal for the maximum use of recycled concrete sand in masonry mortar design

Ledesma¹,

Jiménez²,

Ayuso³

et al. 2016

Mater. construcc.

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“…Zhao et al, 2015.). In the work exposed by Vegas et al (2009) It has been demonstrated that mortars produced with low percentages of substitution of natural aggregate (up to 40%) for recycled ceramic aggregate (Jimenez et al, 2013) or recycled concrete aggregate (Ledesma et al, 2014) may obtain higher compressive strength than conventional mortar. The values obtained in both works were in the range of 7.0 to 8.0 MPa, which was slightly higher than those achieved in this study, despite using (the works cited) a lower cement proportion.…”

Section: Resultsmentioning

confidence: 99%

Analysis of the properties of masonry mortars made with recycled fine aggregates for use as a new building material in Cuba

Martínez

Etxeberria

Pavón

et al. 2016

Revista de la Construcción

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This paper details the research work carried out on masonry mortars produced employing recycled aggregates in 100% substitution for natural sand aggregates. The main objective of the work being the validation of the resulting recycled aggregate mortar for use as a new construction material in Cuba. The recycled aggregates were acquired from the crushing of demolition material obtained from four different houses of distinct construction types. The work was carried out in two experimental stages. In stage 1, mortars with different percentages of recycled aggregates were produced and analysed. The analysis was carried out in order to achieve the optimal mix dosage, while employing the largest usable volume of recycled aggregates and in compliance with the functional requirements established by Cuban regulations. In stage 2, all mortars were produced employing the defined optimal mix proportion The fresh state properties (water retentivity) and hardened state (flexural, compression and bond strengths and capillary absorption capacity) were evaluated in the mortars produced with the other three mixed recycled aggregates of different compositions. It was concluded that the mortars produced with recycled aggregates needed less filler than that of the control mortar in order to obtain adequate properties in their fresh state. However, these recycled aggregate mortars obtained lower mechanical properties and higher capillary absorption that those of the control mortar. Nevertheless they were in compliance with the minimum requirements established in the Cuban regulation.Keywords: construction and demolition waste, recycled fine aggregate, masonry mortars, properties in fresh and hardened state Resumen En el presente trabajo se detalla la investigación llevada a cabo sobre morteros de albañilería utilizando áridos reciclados en sustitución al 100% de la arena natural. El objetivo principal del trabajo es la validación del mortero fabricado con árido reciclado como nuevo material de construcción en Cuba. Los áridos reciclados fueron obtenidos de la trituración del material de demolición de cuatro tipos de viviendas de diferente tipología de construcción. El trabajo se llevó a cabo en dos etapas experimentales. En la etapa 1, se fabricaron y analizaron morteros fabricados con diferentes porcentajes de un tipo de árido reciclado. El análisis se llevó a cabo con el fin de obtener la dosificación óptima del mortero utilizando el mayor porcentaje de árido reciclado posible y en cumplimiento con los requerimientos establecidos por las normas cubanas. En la etapa 2, todos los morteros se fabricaron utilizando la óptima dosificación definida en la etapa anterior. En cada mortero fabricado con los otros tres tipos de áridos reciclados obtenidos, se determinó la retención de agua en estado fresco, y las propiedades de resistencia a flexión, compresión y adherencia así como la absorción capilar en estado endurecido. Se concluyó que los morteros producidos con árido reciclados necesitan menos filler que el de mortero de contro...

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“…Studies on properties of masonry mortars manufactured with fine recycled concrete aggregates revealed that a replacement ratio of fine recycled concrete aggregate up to 40% was a viable alternative for producing environmentally friendly masonry mortar [7].…”

Section: Introductionmentioning

confidence: 99%

Compressive Behavior of Recycled Mortar After Exposure to High Temperatures

Liang¹,

Yang²,

Yi³

et al. 2016

TOCIEJ

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Abstract:The possibility of using fine recycled concrete aggregate as a substitute for natural sand are relatively limited. In order to promote it for engineering application, this paper reports the effect of elevated temperatures from room temperature to 600 o C on the compressive behavior of mortars containing recycled fine concrete aggregate was investigated. It is found that no obvious relation between the color change and the recycled mortars replacement percentage.And the mass loss of recycled mortars is larger than that of normal mortars.The compressive strength of recycled mortars declines significantly as the temperature rises. The elastic modulus of recycled mortars decreased with the increase in temperature, and the decrease is much quicker than the decrease in compressive strength.

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Properties of masonry mortars manufactured with fine recycled concrete aggregates

Cited by 95 publications

References 37 publications

A proposal for the maximum use of recycled concrete sand in masonry mortar design

A proposal for the maximum use of recycled concrete sand in masonry mortar design

Analysis of the properties of masonry mortars made with recycled fine aggregates for use as a new building material in Cuba

Compressive Behavior of Recycled Mortar After Exposure to High Temperatures

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