Mechanical and durability properties of concretes manufactured with biomass bottom ash and recycled coarse aggregates

Beltran, M.G. Sierra; Agrela, Francisco; Barbudo, Auxi; Ayuso, Jesús; Ramírez, Alejandra

doi:10.1016/j.conbuildmat.2014.09.019

Cited by 87 publications

(37 citation statements)

References 24 publications

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“…Previous studies have proven their viability [44]. For that, the Dutch diffusion test was performed according to the standard EA NEN-7375:2004 [37] for the monolithic samples prepared in the laboratory (six BBA mixtures of RMA and NA with 5% cement).…”

Section: Resultsmentioning

confidence: 99%

Reduction of Leaching Impacts by Applying Biomass Bottom Ash and Recycled Mixed Aggregates in Structural Layers of Roads

et al. 2016

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This research is focused on analyzing the environmental pollution potential of biomass bottom ashes as individual materials, as mixtures manufactured with biomass bottom ashes and granular construction aggregates, and these mixtures treated with cement. For the environmental assessment of all of the samples and materials mentioned, the following leaching procedures have been performed: the compliance batch test of UNE-EN 12457-3:2003 for aggregates and bottom ashes; the column test according to NEN 7343:1994 for the mixtures prepared in the laboratory; and the tank test by EA NEN 7375:2004 for analyzing the behavior of mixtures after their solidification/stabilization with 5% cement. After the discussion of the data, the reduction of the pollution load of the most hazardous biomass bottom ashes after their combination with different aggregates can be confirmed, which implies their possible application in civil infrastructures, such as filler embankments and road construction layers, without negatively impacting the environment. In addition, the positive effect of the stabilization/solidification of the cement-treated mixtures with a reduction of the heavy metals that were released at the highest levels, namely As, Hg Cr, Ni, Cu, Se and Mo, was proven.

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Section: Resultsmentioning

confidence: 99%

Reduction of Leaching Impacts by Applying Biomass Bottom Ash and Recycled Mixed Aggregates in Structural Layers of Roads

et al. 2016

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“…analysed the use of RA and fly ash. Beltran et al . analysed the mechanical properties of RAC and biomass bottom ash.…”

Section: Introductionmentioning

confidence: 99%

“…Kim et al 26 analysed the use of RA and fly ash. Beltran et al 27 analysed the mechanical properties of RAC and biomass bottom ash. Nassar and Soroushian 28 studied concretes with 50% of RA, using a 20% of GP as cement replacement and prove that the mechanical properties in the long term are similar to those of traditional concrete.…”

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Mechanical properties of concrete with recycled aggregates and waste glass

Letelier

Tarela

Osses

et al. 2017

Structural Concrete

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The present investigation analyses the mechanical behaviour of concrete with recycled aggregates from precast debris and waste glass. The combination of both recycled materials permits an increased amount of recycled coarse aggregates reducing the loss of mechanical performance of the concrete, and enhances the environmental value of the final material. Four variables are considered: the percentage of recycled course aggregates, the amount of mortar adhered to their surface, the amount of cement replaced by recycled glass powder and the maximum particle size. The final goal is to determine the significance of each variable in the final product and identify the most efficient combination to optimize the performance of the concrete, maximizing its environmental value. Significant results have been obtained, showing that the calibration of the parameters may not be trivial.

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“…However seawater can be suitable for use in plain un-reinforced concrete production [16]. Several studies agree that in comparison with concretes mixed with fresh water, concrete mixed with seawater increases early-age strength and reduces setting time [11][12][13][14] [17-20].…”

Section: List Of Figuresmentioning

confidence: 99%

“…Up to date, certain studies have analysed the possibility of using RMA for higher grade applications than those of non-structural concrete, such as medium-strength concrete [7] [10, 11,12] and high-performance concrete [7,8] [10, 13]. The consistency of the concretes produced with RMA may be affected by the high absorption capacity of the mixed recycled aggregates, which as known is much more than that of natural aggregates [5] [8].…”

Section: List Of Figuresmentioning

confidence: 99%

Properties of Plain Concrete Produced Employing Recycled Aggregates and Sea Water

Etxeberria

Gonzalez-Corominas

2017

Int J Civ Eng

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Highlights:The use of Recycled Mixed Aggregates (RMA) leads to a reduction of landfills growthThe use of seawater represents another advance in sustainability by reducing fresh water consumption Analysis of the possibility of using RMA and seawater in the production of concrete to be used in port sitesThe use of seawater in concretes with type III cement produced a denser cement matrix, which suffered low decrease by RMA addition. AbstractThe generation of construction and demolition waste (C&DW) is a noteworthy environmental and economic concern. The development of new applications in which Recycled Mixed Aggregates (RMA) can be used will lead to a reduction of landfills growth. Moreover, the use of seawater shall represent another advance in sustainability due to the consequent reduction of fresh water consumption, which can be a limited resource in certain areas. Although seawater is not generally recommended for concrete production, especially in reinforced concretes, seawater could be a viable replacement for fresh water in the production of plain concretes. This study intends to analyse the possibility of using RMA and seawater in the production of concrete to be used in port sites. This study is based on 3 different parameters: cement class, water source and RMA content. The results highlighted the beneficial effects of using type III cement, especially with regard to durability properties. The concretes produced employing RMA and type III cement achieved lower value of sorptivity coefficient and higher values of ultrasonic pulse velocity (UPV), chloride ion penetration resistance and electrical resistivity than those produced with natural aggregates and type I cement. Moreover the use of seawater in concretes with type III cement not only produced higher density and lower absorption capacity but also higher mechanical properties by creating a denser cement matrix, which proved to suffer low decrease by RMA addition.Key words: mixed recycled aggregate, sea water, blast furnace cement, recycled concrete, properties INTRODUCTIONConstruction and demolition waste (C&DW) generation is a major economic and environmental concern for European Union countries, as it represents the heaviest and most voluminous waste streams [1]. C&DW still registers low recycling ratios, especially in Southern European countries. In these countries C&DW is commonly comprised of several different materials such as concrete, old raw aggregates, ceramic bricks and gypsum. Following their treatment in a recycling plant the recycled aggregates sourced from this type of C&DW are designated as recycled mixed aggregate (RMA) [2][3][4]. This mixed aggregate, while being comprised of a much greater percentage of ceramic material and other impurities has comparatively only a small percentage of concrete and raw aggregates. Currently most of RMA used in the construction industry are employed in low-strength required applications, such as road sub-base layers.The use of RMA in concrete production has mainly been studied for non-structural eleme...

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Mechanical and durability properties of concretes manufactured with biomass bottom ash and recycled coarse aggregates

Cited by 87 publications

References 24 publications

Reduction of Leaching Impacts by Applying Biomass Bottom Ash and Recycled Mixed Aggregates in Structural Layers of Roads

Reduction of Leaching Impacts by Applying Biomass Bottom Ash and Recycled Mixed Aggregates in Structural Layers of Roads

Mechanical properties of concrete with recycled aggregates and waste glass

Properties of Plain Concrete Produced Employing Recycled Aggregates and Sea Water

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