Novel applications of waste ceramics on the fabrication of foamed materials for exterior building walls insulation

Zhu, Lin; Li, Shujing; Li, Yuanbing; Xu, Nan

doi:10.1016/j.conbuildmat.2018.05.290

Cited by 28 publications

(18 citation statements)

References 18 publications

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“…Most of all, GP foam is more sustainable and eco-friendly than general Portland cement-based foam as it emits less carbon during processing. GP foams are used for photocatalytic degradation applications [5][6][7], membrane supports, catalyst supports and heavy metal adsorption [8,9], humidity control and sound absorption [10,11]; however, most traditional applications for porous ceramics is for the construction application, where it possesses high strength, sound-proof ability, and high thermal insulation [12]. In particular, if foamed cement is used in a building as thermal insulation materials (TIMs), it can improve insulation properties and increase air-conditioning efficiency [13].…”

Section: Introductionmentioning

confidence: 99%

Fast-Curing Geopolymer Foams with an Enhanced Pore Homogeneity Derived by Hydrogen Peroxide and Sodium Dodecyl Sulfate Surfactant

et al. 2022

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The properties of porous and lightweight ceramic foam that can be cured at room temperature using metakaolin-based geopolymers were studied. A geopolymer slurry was prepared using metakaolin and a potassium-based alkaline medium at room temperature, and the obtained viscous paste was expanded via gaseous methods, by means of the decomposition of peroxide at room temperature. Therefore, geopolymer (GP) foam developed in this study through multivariate geopolymer, foaming agents, and surfactants can be cured at room temperature (within 5 days) without a separate heat treatment process. The homogeneous micropores were obtained through the stabilization of the interface between geopolymer slurry and oxygen gas bubbles generated through the base-catalyzed decomposition of hydrogen peroxide. The porosity was confirmed to be 29% and 54% before and after using sodium dodecyl sulfate (SDS). The compressive strengths and densities were 1.57 MPa and 0.75 g/cm3 for GP foam without SDS, and 3.63 MPa and 0.48 g/cm3 for GP foam with SDS. Through the mercury intrusion porosimetry analysis, the pores were further refined from 100 µm to 30 µm when SDS was used, and at the same time, the variation of pore size was minimized, so that a relatively uniform pore size was maintained. In addition, the thermal conductivity is 0.0803 W/m·K and the pore size is 33.2 μm, which is smaller in pore diameter than the geopolymer containing only hydrogen peroxide. As a result, although the hydrogen peroxide alone sample has excellent thermal conductivity, the use of a surfactant is recommended for fine micropore size control. While reducing the non-uniform distribution of pores and the size of micropores generated through the direct foaming method as an inorganic binder, the possibility of an insulation finish was also confirmed by reducing the weight.

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Section: Introductionmentioning

confidence: 99%

Fast-Curing Geopolymer Foams with an Enhanced Pore Homogeneity Derived by Hydrogen Peroxide and Sodium Dodecyl Sulfate Surfactant

et al. 2022

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“…In recent years, several studies have demonstrated the feasibility of using industrial waste in the manufacture of ceramic products, especially porous ceramic products. Among the studied waste materials, organic and inorganic [33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51] ones have shown promising results.…”

Section: Introductionmentioning

confidence: 99%

A review on the production of porous ceramics using organic and inorganic industrial waste

et al. 2022

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The use of industrial waste in compositions of ceramic masses has attracted great interest from the scientific community, as they can be considered abundant and diversified alternative sources of raw materials. At the same time, there is a growing interest in the development of porous ceramics due to their wide possibilities for use in various fields of engineering. In this sense, the present work aimed to provide a literature review on the use of industrial waste as alternative raw materials in the production of porous ceramics, highlighting the innovations and technological potential of research carried out in recent years. Increasingly higher levels of industrial waste in ceramic formulations have been studied, as well as high-performance porous ceramic bodies obtained entirely from waste materials. In addition to promoting the diversification of products, the incorporation of waste in ceramic masses represents an alternative to minimize their negative effects on the environment.

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“…Lightweight porous materials find applications in diverse areas such as thermal insulation of high temperature industrial furnaces or exterior building walls, 1,2 filtration of hot and corrosive media, 3 ceramic membranes and its porous supports, 4 and radiant burners, 5 owing to their excellent properties such as low thermal conductivity, high porosity, high internal surface area, and specific pore structure. The alumina ceramic phase is important to the lightweight porous materials system due to the alumina phase has good mechanical and thermal properties 6,7 such as high mechanical strength, good chemical stability, and high service temperature.…”

Section: Introductionmentioning

confidence: 99%

“…Thus far, compared with freeze casting 12 or direct foaming, 2,8 slurry gelation and foaming, 13 and other foaming methods, 14 the use of pore‐forming agents which can dominate the shape, size, and amount of pores in porous materials by choosing suitable pore‐forming agents type, size, and incorporation content 15 is still the most common used method to produce porous ceramics with porosity not more than 70% 16 . A wide variety of pore‐forming agents such as coffee grounds, bioactive yeast, polystyrene sphere (PS), poppy seed, corn cob, and activated carbon 4,17‐21 had been employed for preparing porous ceramics.…”

Section: Introductionmentioning

confidence: 99%

Preparation of high‐strength lightweight alumina with plant‐derived pore using corn stalk as pore‐forming agent

et al. 2020

Int J Applied Ceramic Tech

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To improve the mechanical and thermal insulation properties of lightweight alumina, which was prepared by using pore‐forming agent from biological sources, the silica sol‐infiltrated corn stalk was utilized. Spring back and hygroscopicity of corn stalk powder as well as cold compressive strength, thermal conductivity, microstructure, and pore size distribution of lightweight alumina were characterized. The results indicate that impregnation of silica sol leads to different degrees of decrease in spring back height due to achieving better mesh by silica gel between the corn stalk powders, and then improves the formability, although at the same time the large number of hydrophilic groups results in an increase in hygroscopicity. Furthermore, sol impregnated pore‐forming agent optimizes the microstructure of the lightweight alumina pores. Lightweight alumina with a cold compressive strength up to 48.64 MPa was produced, and with the silica sol concentration of 3 wt%, lower thermal conductivity values at all test temperatures were obtained. Hence, the use of corn stalk impregnated with the appropriate concentration of silica sol as pore‐forming agent could enhance the mechanical and thermal insulation properties of lightweight alumina for the spheroidization of pore shape, randomization of pore distribution as well as miniaturization of pore size.

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Novel applications of waste ceramics on the fabrication of foamed materials for exterior building walls insulation

Cited by 28 publications

References 18 publications

Fast-Curing Geopolymer Foams with an Enhanced Pore Homogeneity Derived by Hydrogen Peroxide and Sodium Dodecyl Sulfate Surfactant

Fast-Curing Geopolymer Foams with an Enhanced Pore Homogeneity Derived by Hydrogen Peroxide and Sodium Dodecyl Sulfate Surfactant

A review on the production of porous ceramics using organic and inorganic industrial waste

Preparation of high‐strength lightweight alumina with plant‐derived pore using corn stalk as pore‐forming agent

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