Simulation of moisture transport in fired-clay brick masonry structures accounting for interfacial phenomena

Ramírez, Rafael Becerra; Ghiassi, Bahman; Pineda, Paloma; Lourenço, Paulo B.

doi:10.1016/j.buildenv.2022.109838

Cited by 9 publications

(3 citation statements)

References 26 publications

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“…When the initial moisture content increases, the porosity and permeability of the product increase while its final strength decreases. 19 Figure 2 illustrates the percentage of initial moisture content, baking shrinkage and moisture absorption. The clay soil used for brick production should have a moisture content ranging from 4 to 15 wt%.…”

Section: Resultsmentioning

confidence: 99%

“…The initial moisture content and the moisture absorption of materials affect the energy consumption during the firing stage and the flexural strength of fired bricks. When the initial moisture content increases, the porosity and permeability of the product increase while its final strength decreases 19 . Figure 2 illustrates the percentage of initial moisture content, baking shrinkage and moisture absorption.…”

Section: Resultsmentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Reusing ceramic waste in fired brick and as cement additive

Zoqi,

Doosti

2023

J of Chemical Tech & Biotech

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“…This section describes the numerical model adopted for hygro-thermal simulations. The moisture transport model was validated by the authors in [37]. In the present paper, this model is extended to incorporate the thermal field.…”

Section: Hygro-thermal Modelmentioning

confidence: 99%

Hygro-Thermo-Mechanical Analysis of Brick Masonry Walls Subjected to Environmental Actions

et al. 2023

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Masonry walls comprise an important part of the building envelope and, thus, are exposed to environmental effects such as temperature and moisture variations. However, structural assessment usually neglects the influence of these hygro-thermal loads and assumes ideal conditions. This paper presents a hygro-thermo-mechanical model and its application to simulate the impact of temperature- and moisture-related phenomena on the structural behavior of masonry walls. A fully coupled heat and mass transfer model is presented and a 2D finite element model is prepared to simulate the behavior of a brick masonry wall under various hygro-thermal scenarios. Two different mortars are considered: namely, cement mortar and natural hydraulic lime mortar. The results are evaluated in terms of temperature and moisture content distribution across the wall thickness. The hygro-thermal model is further extended to incorporate mechanical effects through the total strain additive decomposition principle. It is shown that the hygro-thermo-mechanical response of the brick masonry wall is a complex 2D phenomenon. Moreover, the environmental loads change the natural stress distribution caused by gravitational loads alone. Finally, the wall with cement mortar develops higher levels of stress when compared to the one with lime mortar, due to the dissimilar hygro-thermal behavior between the constituent materials.

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