Influence of mineral additions on the performance of 100% recycled aggregate concrete

Corinaldesi, Valeria; Moriconi, Giacomo

doi:10.1016/j.conbuildmat.2009.02.004

Cited by 451 publications

(175 citation statements)

References 21 publications

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“…This behavior was also observed by other researchers (Corinaldesi and Moriconi, 2009;Gómez, 2002 (Katz, 2003;Topçu and Sengel, 2004;Martínez and Mendoza, 2006;Rahal, 2007;Casuccio et al, 2008) The r as function of exposure period is shown on Figure 7, proving that the use of 100% RCA increases concrete electric conductivity, which is attributed to the porosity increase reported by RCA concretes, that facilitate the ionic conductivity. The r of SCM-free systems (NA 100% PC and RCA 100% PC) do not exceed the 10 kW-cm threshold (Andrade and Alonso, 1996).…”

Section: Doi: 104067/so718-50732013000100002supporting

confidence: 83%

“…On the other hand, concretes with SCM addition are reporting a proper acceptance for this purpose (Ann et al, 2008;González and Martínex, 2008;Kou and Poon, 2008;Berndt, 2009;Corinaldesi and Moriconi, 2009), highlighting the positive impact of SCM on resistance and durability behaviors, as well as the environmental benefits they provide. (SCM or RCA) have different micro-structure.…”

Section: As a Results Of The Significant Environmental Impact Causedmentioning

confidence: 99%

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Corrosión por cloruros del acero de refuerzo embebido en concreto con agregado grueso reciclado y materiales cementantes suplementarios

et al. 2013

Rev. ing. constr.

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Section: Doi: 104067/so718-50732013000100002supporting

confidence: 83%

Section: As a Results Of The Significant Environmental Impact Causedmentioning

confidence: 99%

Corrosión por cloruros del acero de refuerzo embebido en concreto con agregado grueso reciclado y materiales cementantes suplementarios

et al. 2013

Rev. ing. constr.

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“…A few authors mentioned that the use of FRCA does not jeopardize the mechanical properties of mortar up to a replacement of 30% [25,26]. But for other authors the use of FRCA is not good for the properties of mortar due to the high water absorption and adherent cement paste content [27][28][29][30]. However, the influence of different granular classes of the recycled sand on the properties of mortars has not been systematically studied.…”

Section: Introductionmentioning

confidence: 99%

Influence of fine recycled concrete aggregates on the properties of mortars

Zhao

Rémond

Damidot

et al. 2015

Construction and Building Materials

230

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h i g h l i g h t sInfluences of saturation state of FRCA on the mortars' properties are studied. Mortars made with dried FRCA present larger slump and better mechanical properties. Compressive strength of mortars decreases quasi linearly with substitution rate. Fraction 0/0.63 mm of FRCA has a worse effect on mechanical properties of mortars. a r t i c l e i n f o b s t r a c tFine recycled concrete aggregates (FRCA) also called recycled sand, having particle sizes smaller than 5 mm, are essentially composed of mortar and hardened cement paste. Therefore they induce a large water demand which makes them hard to recycle into mortar and concrete. In this paper, the properties of mortars containing FRCA have been studied, including fresh properties, mechanical properties and interfacial transition zone (ITZ) microstructure.The influence of saturation state of FRCA (dried or saturated) on the properties of mortars of identical compositions has first been studied. The results showed that the slump of mortars containing dried FRCA is always larger than that of mortars containing saturated FRCA. Indeed, in the case of dried FRCA, the theoretical amount of absorbed water is added at the beginning of mixing leading to a temporary increase of the initial efficient W/C ratio and volume of paste, leading to a better workability before its absorption into FRCA. On the contrary, the absorbed water in saturated FRCA is not readily available and thus cannot contribute to increase the initial efficient W/C ratio. Moreover, the compressive strength of mortars containing dried FRCA is always larger than that of mortars made with saturated FRCA, which is attributed to a thinner interfacial transition zone improving its mechanical properties. The influence of the fraction of recycled sand and of the granular class of recycled sand on the mechanical properties of mortars has then been studied with saturated FRCA. The compressive strength of mortars decreases quasi linearly as the replacement percentage of recycled sand increases. Moreover, it is shown that the finer fraction of recycled sand (0/0.63 mm) has the worse effect on the mechanical properties of mortars.

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“…Buscando mejorar la durabilidad de un mortero para fabricar arrecifes artificiales, el desarrollo de este trabajo ha contemplado el uso de un agregado no convencional subproducto de la industria cerámica, el cual es químicamente estable y de baja porosidad, promoviendo al mismo tiempo un mortero más sostenible en comparación con los morteros tradicionales [19,20,21]. La selección de un mortero con agregados de tamaño inferior a los usados comúnmente, permite proyectar estructuras esbeltas de menor peso mejorando su trabajabilidad al momento de la instalación; así mismo, la textura que confieren este tipo de agregados a la superficie del material mejora la rugosidad del mismo, condición clave para una adecuada relación área expuesta versus colonización [22].…”

Section: Introductionunclassified

Biological and physicochemical evaluation of mortar as substrate for manufacturing artificial reef

et al. 2016

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Due to several deterioration of coral reefs around the world, has increased the need to rehabilitate marine environments. Artificial reefs have been proposed as a tool for conservation of these ecosystems. As part of an initiative to develop modules forming artificial reefs made of ecological concrete for the conservation of the biodiversity in the Colombian Caribbean; this work constitutes a starting point. During eleven months two trapezoidal plates were submerged near to Isla Palma, Colombian Caribbean; plates were fabricated in concrete with portland cement and the aggregates were replaced by ceramic waste. After biological and physicochemical evaluations of the material exposed to marine environment was concluded that this is a favorable substrate for the coral reefs, and the plates were colonized by more than 30% of its surface by marine organisms, their structure found internally stable, and there were no adverse effects on marine biota near the test site.Keywords: Ecological mortars; artificial reefs; waste resource; use of waste; conservation.Evaluación biológica y fisicoquímica de un mortero como sustrato para la fabricación de arrecifes artificiales Resumen Debido al deterioro de los arrecifes de coral en todo el mundo ha aumentado la necesidad de rehabilitar los entornos marinos. Los arrecifes artificiales se han propuesto como una herramienta para la conservación de estos ecosistemas. Durante once meses se sumergieron dos placas en forma trapezoidal, en Bajo Grande (Isla Palma), Caribe Colombiano. Esto se realizó como parte de una iniciativa para desarrollar módulos formadores de arrecifes artificiales. Se fabricó un mortero ecológico donde se reemplaza el uso de agregados naturales por residuos cerámicos. Las placas expuestas al medio marino fueron colonizadas por organismos en un 30% de su superficie aproximadamente, la estructura interna de las muestras se mantuvo estable y no se apreciaron efectos adversos sobre la biota marina cercana al lugar de prueba. Después de hacer evaluaciones biológicas y fisicoquímicas del material expuesto se concluyó que éste constituye un sustrato favorable para el desarrollo de los arrecifes artificiales.

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Influence of mineral additions on the performance of 100% recycled aggregate concrete

Cited by 451 publications

References 21 publications

Corrosión por cloruros del acero de refuerzo embebido en concreto con agregado grueso reciclado y materiales cementantes suplementarios

Corrosión por cloruros del acero de refuerzo embebido en concreto con agregado grueso reciclado y materiales cementantes suplementarios

Influence of fine recycled concrete aggregates on the properties of mortars

Biological and physicochemical evaluation of mortar as substrate for manufacturing artificial reef

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