Use of recycled aggregates from civil construction in self-compacting mortar

Valle, Fernanda Rodrigues Santos; Gonçalves, Paulo César; Ranieri, Maria; Melo, Mírian de Lourdes Noronha Motta; Santos, Valquíria Claret dos

doi:10.1590/s1983-41952022000100007

Cited by 3 publications

(2 citation statements)

References 29 publications

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“…For very fine particles, EMMA has an enhanced feature within the model that can be utilized. Note that optimization of mix designs with the help of the EMMA software has successfully been carried out in the past by many researchers [39][40][41][42][43][44][45].…”

Section: Particle Packing By Emmamentioning

confidence: 99%

Influence of Optimum Particle Packing on the Macro and Micro Properties of Sustainable Concrete

Abushama,

Tamimi,

Tabsh

et al. 2023

Sustainability

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In this research, the possibility of making eco-friendly concrete from available materials in the local United Arab Emirates (UAE) market was investigated. Supplementary cementitious materials, such as ground granulated blast-furnace slag (GGBS) and silica fume (SF), were utilized for decreasing the cement quantity, enhancing the particle size distribution and improving packing. In sum, 130 concrete specimens—cubes, cylinders, and prisms—from 10 different concrete mixes were tested to determine the enhancement levels in the fresh and hard properties of new concrete. The results showed the improved particle packing of the concrete, especially within the region of sizes 100–10,000 microns, produced by the Elkem Materials Mix Analyser (EMMA), closely matching the Andreassen theoretical model. The green concrete incorporating SF and GGBS possessed air content in the range 1.0–1.4% and compressive strength that is on average 11% higher than the well-packed concrete that did not contain SF or GGBS. Compared to the ACI 318 code’s predictions, the experimental findings of the optimally packed concrete’s moduli of rupture and elasticity were under-estimated by 55–69% and 0.8–8.8%, respectively. The rapid chloride permeability test (RCPT) showed results as low as 392 coulombs for mixes with supplementary cementitious materials, indicating very low chloride permeability. Microstructural analysis using a scanning electron microscope (SEM) demonstrated that concrete with supplementary materials has fewer voids, more homogeneous integration of ingredients, and an abundance of C-S-H products that supported the RCPT findings and tests of mechanical properties. The study demonstrated a significant decrease in carbon dioxide (CO2) emissions of concrete utilizing GGBS and SF and the financial feasibility of eco-friendly concrete in the UAE.

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Section: Particle Packing By Emmamentioning

confidence: 99%

Influence of Optimum Particle Packing on the Macro and Micro Properties of Sustainable Concrete

Abushama,

Tamimi,

Tabsh

et al. 2023

Sustainability

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“…Construction and demolition waste (class A) have become increasingly one of the targets of the technical-scientific environment, using it as an aggregate for numerous uses in construction and other (12). The use of this waste becomes an important tool in combating environmental degradation, directly and indirectly, by reducing the consumption of inputs from civil construction from the process of crushing rocks, gravel and artificial sand.…”

Section: Introductionmentioning

confidence: 99%

Development of Artificial Rock through the Recycling of Construction Waste and Demolition in Polymeric Materials

Reis,

Colorado,

Vieira

et al. 2024

Preprint

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Civil construction is one of the oldest known activities in humanity, reports indicate that builders of the Roman Empire already sought the reuse of materials. Currently, considering the depletion of the supply of natural resources, the recycling of solid waste from construction and demolition (CDW), not only provides new products, but also offers ecological and economic alternative. In this context, this research seeks new variables for the disposal of waste from construction and demolition having in the composition of artificial finishing stones an odd possibility to be analyzed. In this research was developed and analyzed a new composite from the construction and demolition waste using as a binder an orthophthalic polyester resin. The residue was sieved and separated by granulometry by the simplex centroid method, the best compacted mixture was determined statically by ANOVA and the Tukey test. The residue was characterized by X-ray fluorescence and the resin by infrared spectroscopy by Fourier transform. Artificial rock plates were produced with 85% residue and 15% resin, by mass, by vibro system, compression and vacuum, later were cut for mechanical, physical and chemical tests. Analysis was performed by scanning electron microscopy of fractured compositions as well as grain sizes. The artificial stone with the best results presented density of 2,256 g/cm3, water absorption of 0.69%, apparent porosity of 1.55%; bending strength of 34.74 MPa and compression of 111.96 MPa; good results in the alterability and thermal tests. In this satisfactory scenario, the use of this waste in the composition of artificial rocks is promising because it directly meets the concept of sustainable development; replacing the concept of end-of-life of the linear economy, by new circular flows of reuse, restoration and renovation, in an integrated process the circular economy; as well as the quality of the final product with properties similar to the artificial rocks already marketed.

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Use of superabsorbent polymers in cement-based compounds: a bibliometric analysis

Souza

Gonçalves

Silva

et al. 2021

RSD

Self Cite

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Superabsorbent polymers (SAP) have gained the attention of the engineering field for applications in cementitious composites. Recently, many studies have addressed using these materials as an alternative to controlling recurrent pathologies, especially retraction in the hardening stage. This study conducted a literature review in the Scopus and Web of Science databases to identify relevant studies for future research in this area. Analyses were performed using the RStudio software program, where data on the number of publications, the main authors and journals, the most used keywords, and most common countries of publication were analyzed. Furthermore, bibliographic coupling and co-citation analyses were carried out. The results indicate that the most published authors were De Belie, Snoeck and Liu J., and the most cited authors were Jensen, Schrofl and Snoeck. Although Brazil is among the fifteen most published countries, it was not among the most cited, showing lacks in studies. In total, 343 articles were found in the Scopus database and 369 in the Web of Science.

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Use of recycled aggregates from civil construction in self-compacting mortar

Cited by 3 publications

References 29 publications

Influence of Optimum Particle Packing on the Macro and Micro Properties of Sustainable Concrete

Influence of Optimum Particle Packing on the Macro and Micro Properties of Sustainable Concrete

Development of Artificial Rock through the Recycling of Construction Waste and Demolition in Polymeric Materials

Use of superabsorbent polymers in cement-based compounds: a bibliometric analysis

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