Recycled Aggregates from Ceramic and Concrete in Mortar Mixes: A Study of Their Mechanical Properties

Rosado, Santiago; Costafreda, Jorge L.; Martín, Domingo Alfonso; Presa, Leticia; Gullón, Lidia

doi:10.3390/ma15248933

Cited by 3 publications

(3 citation statements)

References 31 publications

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“…The calculation of the Resistant Activity Index (RAI) has once again permitted the recording of the criteria established in this work regarding the influence of the chemical constitution, porosity, specific surface, and pozzolanic activity of the samples studied and their increase once they have been subjected to high normalized temperatures. The papers of Presa et al [55], Martín et al [56], and Rosado et al [57] describe similar conclusions that support the arguments discussed in this research.…”

Section: Mechanical Strength Tests (Mst) At 7 28 and 90 Dayssupporting

confidence: 84%

Improvement of the Mechanical Properties of Mortars Manufactured with Partial Substitution of Portland Cement by Kaolinitic Clays

et al. 2023

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Presently, the search for urgent solutions to mitigate climate change has become a global priority. One of the most important challenges is the characterization, standardization, and technology of sustainable natural raw materials, which will significantly improve the quality of common types of cement, the production process of which emits large amounts of greenhouse gases into the atmosphere. This work is focused on the study of natural kaolinitic clays (NKC) from the eastern part of the Iberian Peninsula and its main objective is to define and normalize their properties as natural pozzolanic materials. This research consists of an initial study to determine the morphological and chemical properties using SEM and XRF. Furthermore, the physical properties of the samples were studied, such as thermic treatment (TT), Blane particle finesse (BPF), real density (RD) and apparent density (AD), porosity (P), volume stability (VS) and start and final setting time (SFST). On the other hand, technological analyses were carried out as follows: chemical analysis (CATQ), pozzolanicity (CAP), mechanical compression strength tests at 7, 28, and 90 days (MCST) as well as the ultrasonic pulse velocity (UPV). XRF results indicated that the SiO2 content (49.9–51.0%) of kaolinitic clay in its natural state (NKC) increases to 57.41 and 58.10%, respectively, when calcined (CKC). The chemical analysis of pozzolanicity established that the NKC does not show pozzolanic activity during the first 8 and 15 days; however, once calcinated, its pozzolanic reactivity increases substantially. On the other hand, the results of the mechanical stress tests (MCST) indicate an exponential increase in mechanical resistance from 7 to 90 days, which is higher in mortars made with CKC; similarly, and according to the results of the calculation of the Resistant Activity Index (RAI), it shows that the substitutions of Portland cement (PC) by NKC are effective between the ranges of 10 and 25%, while in the case of the substitution of PC by CKC, all formulations (10, 25 and 40%) are effective. This research establishes that the kaolinitic clays of the east of the Iberian Peninsula can be considered quality pozzolanic materials, capable of partially replacing Portland cement. The results presented here could be used as guidelines for the understanding and application of natural pozzolanic materials contributing to the improvement of types of cement, mortars, and concretes, which would positively affect the quality and preservation of the environment as well as the sustainability of eco-efficient construction materials.

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Section: Mechanical Strength Tests (Mst) At 7 28 and 90 Dayssupporting

confidence: 84%

Improvement of the Mechanical Properties of Mortars Manufactured with Partial Substitution of Portland Cement by Kaolinitic Clays

et al. 2023

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“…9 In recent years, there has been a growing focus on reusing and recovering ceramic waste due to its inherent properties such as strength, wear resistance, heat resistance and fire resistance. 10 In the study conducted by Rosado et al, 11 mortars were produced by mixing cement with recycled ceramic aggregates and recycled concrete aggregates. The results indicate that both tpes of aggregates adversely affect the healing process of the samples.…”

Section: Introductionmentioning

confidence: 99%

“…In the study conducted by Rosado et al ., 11 mortars were produced by mixing cement with recycled ceramic aggregates and recycled concrete aggregates. The results indicate that both tpes of aggregates adversely affect the healing process of the samples.…”

Section: Introductionmentioning

confidence: 99%

Reusing ceramic waste in fired brick and as cement additive

Zoqi,

Doosti

2023

J of Chemical Tech & Biotech

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BACKGROUNDAlthough there has been considerable research on the utilization of ceramic and tile waste (CTW) in concrete production, there has been a noticeable lack of studies examining its application in fired brick manufacturing and the use of ceramic glaze powder as an additive in cement. The aim of this study is to assess the potential of reusing CTW as concrete aggregate and as part of fired brick composition. Furthermore, this research investigates the potential application of glaze powder as a novel cement additive, which has not been previously explored.RESULTSThe results indicate that bricks made from waste materials had a moisture absorption of 12.2% and flexural strengths ranging from 15.39 to 24.2 MPa. X‐ray diffraction analysis showed that quartz and kaolinite were the dominant crystalline phases in bricks made from raw glazed ceramic. The concentration of heavy metals in the toxicity characteristic leaching procedure leachate of the waste materials decreased after the firing process during the manufacturing of bricks due to oxidation, immobilization and encapsulation processes, with levels below standard limits. In concrete, the use of 20% ceramic glaze powder as a partial cement replacement resulted in a 55% increase in compressive strength. Additionally, the leaching of barium decreased by 70% and that of strontium decreased by 17%.CONCLUSIONThis study highlights the promising utilization of CTW in fired brick production and the effective incorporation of ceramic glaze powder as a cement additive. The findings suggest enhanced mechanical properties and decreased heavy metal leaching, indicating the viability of CTW reuse in sustainable construction practices. © 2023 Society of Chemical Industry (SCI).

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From waste to resource: Exploring the recyclability and performance of gypsum-graphene nanofiber composites

Gordon,

Barrio,

Escamilla

et al. 2024

Resources, Conservation & Recycling Advances

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Recycled Aggregates from Ceramic and Concrete in Mortar Mixes: A Study of Their Mechanical Properties

Cited by 3 publications

References 31 publications

Improvement of the Mechanical Properties of Mortars Manufactured with Partial Substitution of Portland Cement by Kaolinitic Clays

Improvement of the Mechanical Properties of Mortars Manufactured with Partial Substitution of Portland Cement by Kaolinitic Clays

Reusing ceramic waste in fired brick and as cement additive

From waste to resource: Exploring the recyclability and performance of gypsum-graphene nanofiber composites

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