Mechanical and microstructural properties of recycled concretes mixed with ceramic recycled cement and secondary recycled aggregates. A viable option for future concrete

Juan-Valdés, Andrés; Rodríguez-Robles, Desirée; García-González, Julia; Gómez, María Isabel Sánchez de Rojas; Guerra‐Romero, M. Ignacio; Belie, Nele De; Pozo, Julia Mͣ Morán-del

doi:10.1016/j.conbuildmat.2020.121455

Cited by 43 publications

(20 citation statements)

References 54 publications

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“…Research that use recycled aggregates for the production of HPC and UHPC are also mentioned. These researches use aggregate from concrete waste [ 114 , 115 ] and ceramic waste [ 157 , 165 ]. Using these residues, which present the particle size curve within the normative limits of the ASTM C33 standard, the authors obtained a compression strength after 28 days of curing of 77.3 MPa, proving the feasibility of using recycled aggregates, as long as they meet the stipulated granulometry parameters.…”

Section: Classic Components Used For Hpc and Uhpc Productionmentioning

confidence: 99%

Materials for Production of High and Ultra-High Performance Concrete: Review and Perspective of Possible Novel Materials

Marvila¹,

Azevedo²,

Matos

et al. 2021

Materials

110

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This review article proposes the identification and basic concepts of materials that might be used for the production of high-performance concrete (HPC) and ultra-high-performance concrete (UHPC). Although other reviews have addressed this topic, the present work differs by presenting relevant aspects on possible materials applied in the production of HPC and UHPC. The main innovation of this review article is to identify the perspectives for new materials that can be considered in the production of novel special concretes. After consulting different bibliographic databases, some information related to ordinary Portland cement (OPC), mineral additions, aggregates, and chemical additives used for the production of HPC and UHPC were highlighted. Relevant information on the application of synthetic and natural fibers is also highlighted in association with a cement matrix of HPC and UHPC, forming composites with properties superior to conventional concrete used in civil construction. The article also presents some relevant characteristics for the application of HPC and UHPC produced with alkali-activated cement, an alternative binder to OPC produced through the reaction between two essential components: precursors and activators. Some information about the main types of precursors, subdivided into materials rich in aluminosilicates and rich in calcium, were also highlighted. Finally, suggestions for future work related to the application of HPC and UHPC are highlighted, guiding future research on this topic.

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Section: Classic Components Used For Hpc and Uhpc Productionmentioning

confidence: 99%

Materials for Production of High and Ultra-High Performance Concrete: Review and Perspective of Possible Novel Materials

Marvila¹,

Azevedo²,

Matos

et al. 2021

Materials

110

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“…Meanwhile, another group of researchers [110] studied concretes based on a binder containing a sulfate resistant blast furnace slag (CEM III/A), plus a blend of Portland cement and clay brick powder. Furthermore, coarse MRA was also added as partial natural aggregates substitution.…”

Section: Mixed Recycled Aggregatesmentioning

confidence: 99%

Advantages and shortcomings of the utilization of recycled wastes as aggregates in structural concretes

Miraldo

Lopes

Pacheco-Torgal

et al. 2021

Construction and Building Materials

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h i g h l i g h t sComprehensive, systematic review on current state of the art concerning the utilization of a wide array of wastes as aggregates, in ordinary Portland cement concrete compositions, for structural applications. Analysis of the advantages and shortcomings for each recycling material in the context of the adoption of circular patterns in the construction sector life cycle. Evaluation of alkali-activated binders as an alternative for overcoming important shortcomings of Portland cement-based structural concretes.

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“…Blast furnace slag-bearing cement was chosen here based on earlier findings [8,28,29] and recommendations set out in Mas et al [30]…”

Section: Conventional Cementmentioning

confidence: 99%

Recycled Precast Concrete Kerbs and Paving Blocks, a Technically Viable Option for Footways

et al. 2021

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The linear economy paradigm in place to date has to be seriously challenged to give way to a new school of thought known as the circular economy. In this research work, precast kerbs and paving blocks made with recycled concrete (RACC-mixture) bearing 50 wt% mixed recycled aggregate (masonry content of 33%) and an eco-efficient cementitious material as 25 wt% conventional binder replacement were evaluated to assess their intrinsic potential to replace traditional raw materials, in keeping with circular economy criteria. Therefore, precast products were subjected to mechanical strength, durability and microstructure tests and were compared to conventional concrete units (CC-mixture and commercially available precast elements). Although a class demotion was observed for water absorption and some decreases in flexural strength (26%), splitting tensile strength (12.8%) and electrical resistivity (45%) and a lower class water absorption were registered, and the recycled mixture also exhibited a greater performance in terms of compressive strength (6%), a better abrasion resistance classification and a comparable porosity and microstructure, which ensures a good concrete durability. In any case, the results showed that precast pieces were European standard-compliant, thus supporting the viability of the mixed recycled aggregates and eco-efficient cementitious replacement in footways.

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Mechanical and microstructural properties of recycled concretes mixed with ceramic recycled cement and secondary recycled aggregates. A viable option for future concrete

Cited by 43 publications

References 54 publications

Materials for Production of High and Ultra-High Performance Concrete: Review and Perspective of Possible Novel Materials

Materials for Production of High and Ultra-High Performance Concrete: Review and Perspective of Possible Novel Materials

Advantages and shortcomings of the utilization of recycled wastes as aggregates in structural concretes

Recycled Precast Concrete Kerbs and Paving Blocks, a Technically Viable Option for Footways

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