Influence of Granulometry on Thermal and Mechanical Properties of Cement Mortars Containing Expanded Perlite as a Lightweight Aggregate

Leyton-Vergara, Matías; Pérez-Fargallo, Alexis; Pulido-Arcas, Jesús A.; Cárdenas-Triviño, Galo; Piggot-Navarrete, Jeremy

doi:10.3390/ma12234013

Cited by 21 publications

(12 citation statements)

References 41 publications

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“…Liu et al [31] concluded that the increase in density results in an increase in th values of the thermal conductivity of iron ore sand cement mortar. Subsequent studie [32,33] have confirmed earlier findings. The density at the ages of 28 days and 140 day was assessed, taking into account the two different storage conditions.…”

Section: Densitysupporting

confidence: 64%

Influence of a Novel Carbon-Based Nano-Material on the Thermal Conductivity of Mortar

et al. 2022

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The paper presents the results of research work to assess the thermal conductivity of mortar incorporating a novel carbon-based nano-material (CBN). The data from the laboratory tests served as the starting point in training an artificial neural network (ANN) based on the Levenberg–Marquardt backpropagation algorithm that was used to predict the values of the thermal conductivity at later ages. The used CBNs were essential precursors of multi-walled carbon nano-tubes but different from their counterparts in the fact that they were capped at the ends. This configuration should result in lower surface tension and should prevent the bundling even without the use of surfactants and sonication. The obtained results show that the mortar mixes with CBN exhibit higher values for the thermal coefficient at early ages compared to the reference mix, even at very low percentages of CBN by weight of cement. The ANN is able to accurately predict the experimental results both at 28 days and at later ages. The obtained results should serve as the starting point for further investigations into the microstructure of cement-based materials enhanced with CBNs.

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Section: Densitysupporting

confidence: 64%

Influence of a Novel Carbon-Based Nano-Material on the Thermal Conductivity of Mortar

et al. 2022

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“…The development of new construction materials, with emphasis on insulation, should be focused on the relation between thermal and mechanical properties of materials, as well as their composition [ 2 ]. Regarding the strict European criteria for the U-value (thermal transmittance) of building envelopes [ 3 ], several studies on the development of thermal enhanced building materials and components have been performed, with a special interest in thermal mortars [ 4 , 5 , 6 , 7 ]. Additionally, the incorporation of nanoparticles in mortars could improve their durability compared to traditional building materials [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Durability of a New Thermal Aerogel-Based Rendering System under Distinct Accelerated Aging Conditions

et al. 2021

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The widespread application of innovative thermal enhanced façade solutions requires an adequate durability evaluation. The present work intends to assess the durability of a new aerogel cement-based rendering system through the adaptation of different accelerated aging cycles, such as heating–freezing, freeze–thawing, and heat–cold. Several mechanical properties and also capillary and liquid water absorptions were tested for uncoated and coated specimens. A decrease in the mechanical strength, especially after freeze–thaw cycles, was observed. However, the water action promoted the late hydration of the cement paste contributing to the densification of the matrix and, consequently, the increase of the adhesive strength. Additionally, a decrease in the dynamic modulus of elasticity and an increase in the Poisson’s ratio were observed after aging, which indicates a higher capacity of the render to adapt to substrate movements, contributing to a reduction of cracking.

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“…Perlite is a natural glassy volcanic rock (composition: ≅ 75% of SiO 2 ; ≅ 15% of Al 2 O 3 ) (Ghassabzadeh et al, 2010;Cabuk et al, 2018;Corregidor et al, 2019), termed expanded perlite (EP) after being rapidly heated for 760-1 200°C and consequently expanded up to 20 times its original volume (Alkan and Dogan, 2002;Cabuk et al, 2018;De Oliveira et al, 2019). EP is employed in the construction industry (Papa et al, 2018;Leyton-Vergara et al, 2019;Top et al, 2020;Jiang et al, 2020), composite structure (Rodriguez et al, 2016;Ma et al, 2020;Rathore et al, 2020), agriculture and environmental sectors (Villaseñor et al, 2011;Torab-Mostaedi et al, 2011;Díez et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Expanded perlite: potential for removing antibiotics from water

Vicentin

Rocha

2021

WSA

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This work aims to study the potential of expanded perlite (EP) for amoxicillin (AMX) removal in aqueous solution. For this purpose, chemical, morphological, and textural characteristics of the EP were evaluated, in addition to AMX removal by the adsorption process. The kinetic, isothermal, and thermodynamic parameters were also assessed. The EP presented an isoelectric point of 6.5 and a surface with hydroxyl bands, which favour the adsorption process. Air bubbles were sealed and randomly connected with each other, increasing the surface area relative to the adsorption sites. These non-porous or macro-porous sites demonstrate efficiency in the mechanisms of mass transfer. AMX removal was determined to be a pseudo-second-order process since the adsorption velocity was proportional to the square of the available adsorption sites and indicates heterogeneity in the surface interactions between the adsorbed molecules. Also, the interactions were considered multilayer for low concentrations and monolayer for high concentrations (Sips isotherm). The adsorption process was endothermic and utilised a physical adsorption mechanism. Considering that no modification treatment was applied to the EP, and due to its neutral isoelectric point, macropores, amorphous and dipole induction force (physical adsorption) characteristics, favourable affinity between EP and AMX was observed.

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Influence of Granulometry on Thermal and Mechanical Properties of Cement Mortars Containing Expanded Perlite as a Lightweight Aggregate

Cited by 21 publications

References 41 publications

Influence of a Novel Carbon-Based Nano-Material on the Thermal Conductivity of Mortar

Influence of a Novel Carbon-Based Nano-Material on the Thermal Conductivity of Mortar

Durability of a New Thermal Aerogel-Based Rendering System under Distinct Accelerated Aging Conditions

Expanded perlite: potential for removing antibiotics from water

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