Mechanical and microstructural characterization of non-structural precast concrete made with recycled mixed ceramic aggregates from construction and demolition wastes

Juan-Valdés, Andrés; Rodríguez-Robles, Desirée; García-González, Julia; Guerra‐Romero, M. Ignacio; Pozo, Julia Mͣ Morán-del

doi:10.1016/j.jclepro.2018.01.191

Cited by 59 publications

(27 citation statements)

References 45 publications

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“…The present paper researches a complete characterization of recycled curbstones and paving blocks, focusing its attention on physical aspects that could define the durability of precast elements. This work completes others, inter alia [11,18] and is a new step in the research area, including a more exhaustive characterization of the recycled concrete, especially in those characteristics related to durability. This manuscript includes new tests of water absorption, abrasion, electrical resistivity, and freeze–thaw, four different tests that were not included in previous works and that give an accurate idea of the durability of recycled concrete when compared to control concrete.…”

Section: Introductionsupporting

confidence: 73%

Paving with Precast Concrete Made with Recycled Mixed Ceramic Aggregates: A Viable Technical Option for the Valorization of Construction and Demolition Wastes (CDW)

et al. 2018

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This research aimed to prove the feasibility of producing two types of precast elements widely used in construction, such as curbstones and paving blocks, using recycled concrete made with a 50% substitution of the natural gravel by recycled mixed aggregates with a significant ceramic content (>30%). In order to prove the quality of such mass concrete recycled precast elements, two different mixes were used: the first one was a conventional concrete mix provided by Prefabricados de Hormigón Pavimentos Páramo S.L., one of the collaborating companies in this study, and the other was a mixture in which wt 50% of the natural coarse aggregates were substituted for recycled mixed aggregates ceramic (RMAc). This recycled aggregate is a heterogeneous mixture of unbound aggregates, concrete, ceramic, etc., used as a secondary recycled aggregate and commonly produced in a lot of recycling plants in many European countries. This material was supplied by Tecnología y Reciclado S.L., the other collaborating company. Both mixtures were representative in order to establish the comparative behavior between them, taking into account that smaller percentages of replacement of the natural with recycled aggregates will also produce good results. This percentage of substitution represents a high saving of natural resources (gravel) and maintains a balanced behavior of the recycled concrete, so this new material can be considered to be a viable and reliable option for precast mass concrete paving elements. The characterization of the recycled precast elements, covering mechanical, microstructural, and durability properties, showed mostly similar behavior when compared to the analogous industrially-produced pieces made with conventional concrete.

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Section: Introductionsupporting

confidence: 73%

Paving with Precast Concrete Made with Recycled Mixed Ceramic Aggregates: A Viable Technical Option for the Valorization of Construction and Demolition Wastes (CDW)

et al. 2018

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“…It has been studied in depth how the coarse recycled aggregate fraction (CRA) (Guo et al, 2018, Sagoe-Crentsil et al, 2001 and fine recycled aggregate fraction of RA (FRA) (F. Rodrigues et al, 2013, L. Evangelista andJ. de Brito, 2007) influence RAC, most of it sourced from concrete but also from ceramic structural (Medina et al, 2016) and non-structural precast components (Juan- Valdés et al, 2018). The most suitable RA is the one coming from demolished concrete structures or precast components, where the main difference from natural aggregate (NA) is the attached mortar (M.S.…”

Section: Introductionmentioning

confidence: 99%

Micro- and macro-porosity of dry- and saturated-state recycled aggregate concrete

Thomas

Setién

Polanco

et al. 2019

Journal of Cleaner Production

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Society is becoming aware of the environment and progressively using more recycled aggregates to produce recycled structural aggregate concrete. In addition, many researches have analysed the properties of hardened recycled aggregate concrete, but few of them have focused on the mixing method and the consequences that it has on the properties of concrete. In this research, recycled aggregate concrete using dry, with extra water supply, and saturated recycled aggregate has been prepared. The different mixing conditions induce differences the micro and macroporosity of concrete that have been evaluated by computerized axial tomography, scanning electron microscopy and a new developed methodology, based on digital image analysis, developed to analyse the distribution and size of macroporosity. The software has been implemented in Matlabã and is available to the readers of the journal for downloading and use. The results show that the dry and saturated recycled aggregate lead to very different concrete properties. On the one hand, the use of dry aggregate causes a local reduction of the w/c ratio, increasing heterogeneity and decreasing workability. On the other hand, the saturated aggregate incorporates extra water by adsorption that causes an increase in the water/cement ratio, thus increasing the porosity volume and size of the new mortar of the recycled aggregate concrete.

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“…Obtaining cement-based materials made with RA (obtained from the treatment of C&DWs) has been one of the most studied applications. Although, indeed, there are currently some reliable studies that support the use of C&DW in conventional concrete [ 16 , 17 , 18 , 19 , 20 , 21 , 22 ], in recent years some studies on the use of RA have begun to be published with self-compacting concrete (SCC), although they are still rare [ 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 ]. Most of these studies compare the various fresh and hardened properties of SCC with RA and without RA (natural aggregates), apart from SCC mix design.…”

Section: Introductionmentioning

confidence: 99%

Influence of Design Parameters on Fresh Properties of Self-Compacting Concrete with Recycled Aggregate—A Review

Martínez‐García

Jagadesh²,

Fraile‐Fernández

et al. 2020

Materials

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This article presents an overview of the bibliographic picture of the design parameter’s influence on the mix proportion of self-compacting concrete with recycled aggregate. Design parameters like water-cement ratio, water to paste ratio, and percentage of superplasticizers are considered in this review. Standardization and recent research on the usage of recycled aggregates in self-compacting concrete (SCC) exploit its significance in the construction sector. The usage of recycled aggregate not only resolves the negative impacts on the environment but also prevents the usage of natural resources. Furthermore, it is necessary to understand the recycled aggregate property’s role in a mixed design and SCC properties. Design parameters are not only influenced by a mix design but also play a key role in SCC’s fresh properties. Hence, in this overview, properties of SCC ingredients, calculation of design parameters in mix design, the effect of design parameters on fresh concrete properties, and the evolution of fresh concrete properties are studied.

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Mechanical and microstructural characterization of non-structural precast concrete made with recycled mixed ceramic aggregates from construction and demolition wastes

Cited by 59 publications

References 45 publications

Paving with Precast Concrete Made with Recycled Mixed Ceramic Aggregates: A Viable Technical Option for the Valorization of Construction and Demolition Wastes (CDW)

Paving with Precast Concrete Made with Recycled Mixed Ceramic Aggregates: A Viable Technical Option for the Valorization of Construction and Demolition Wastes (CDW)

Micro- and macro-porosity of dry- and saturated-state recycled aggregate concrete

Influence of Design Parameters on Fresh Properties of Self-Compacting Concrete with Recycled Aggregate—A Review

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