The effect of clay on foaming and mechanical properties of glass foam insulating material

Ercenk, Ediz

doi:10.1007/s10973-016-5582-8

Cited by 19 publications

(10 citation statements)

References 41 publications

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“…The role of clay was to increase the mechanical strength of glass foam. This effect has been highlighted in several previous works [14,21,25]. The value of dolomite powder ratio varied in experiments in low limits between 3.1-3.7 wt.%.…”

Section: Resultssupporting

confidence: 58%

“…In the same way, the value of the products porosity has evolved (between 67.3-70.0%). In contrast, the compressive strength increased significantly from the value corresponding to the minimum clay content (2.8 MPa) to that corresponding to the maximum content (6.2 MPa), demonstrating the theoretically known influence of clay on the mechanical properties of a foamed material [14]. Due to the consistent presence of clay in the composition of glass foam, the proportion of water absorption was quite high (between 4.8-7.6%), the clay content directly influencing this material characteristic.…”

Section: Resultsmentioning

confidence: 80%

“…According to [14], testing the influence of the addition of clay powder in a finely ground mixture composed of soda-lime glass waste and dolomite powder as a foaming agent was performed. Three variants have experimented, one of reference with glass waste (85%) and dolomite (15%) and two, in which the proportion of clay addition was successively 9.09 and 16.66 % and the dolomite proportion was successively reduced to 13.63 and 12.5%, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Unconventional Technique Used to Manufacture Porous High-Strength Glass Foam

Paunescu¹,

Axinte²,

Drăgoescu³

et al. 2021

JESR

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The paper presents experimental results obtained in the manufacturing process of porous high-strength glass foam for thermal insulation in buildings made of glass waste and kaolin clay as raw materials and dolomite as a foaming agent. The paper’s originality is the use of the unconventional microwave heating technique. The best product manufactured by this technique was that sintered at 1050 ºC using 18 wt.% kaolin clay and 3.5 wt.% dolomite. The product characteristics were: the apparent density of 0.66 g·cm-3, the thermal conductivity of 0.155 W/m·K, the compressive strength of 5.3 MPa and a microstructural homogeneity with pore size between 0.20-0.50 mm.

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Section: Resultssupporting

confidence: 58%

Section: Resultsmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%

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Unconventional Technique Used to Manufacture Porous High-Strength Glass Foam

Paunescu¹,

Axinte²,

Drăgoescu³

et al. 2021

JESR

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“…Foaming process occurs in temperatures higher than the softening temperature of glass; above this temperature, in general, glass viscosity is inferior to 10 6.6 Pa.s. [19][20][21][22] Properties of foamed glass vary according to their pore structure (morphology, quantity, size, and type) 23 which is related to type and amount of foaming agent, and processes parameters, for example, temperature and time of sintering. 2 The main advantage of using foaming agents to produce glass foams is the possibility of modifying foam structure depending on the desired application, in addition to relatively easy operation and low cost.…”

Section: Introductionmentioning

confidence: 99%

Glass foams produced by glass waste, sodium hydroxide, and borax with several pore structures using factorial designs

Silva

Kubaski

Tebcherani

2019

Int J Applied Ceramic Tech

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Glass foams have great potential for several technological applications, for example, filters and thermal or acoustic insulators. Sodium hydroxide is an efficient foaming agent to obtain glass foams with high level of porosity. However, the control of variables that influences on structure, type, and size of pores of glass foams is necessary.This study evaluates the influence of composition and process parameters on glass foams based on soda-lime glass waste, sodium hydroxide, and borax. Experiments were conducted using factorial designs. According to the experimental conditions, bulk density varied from 0.16 to 0.79 g cm −3 and maximum porosity of 92%. Amounts of NaOH and borax in addition to sintering temperature are the main variables of the foaming process. The role of NaOH content is to reduce the density and closed porosity of glass foams associated with an increase in their open porosity. The addition of borax with low NaOH amount promoted densification and pore closure in glass foams. NaOH and borax content allows controlling the type of predominant porosity on foams (open or closed porosity). Glass foams were resistant to sulfuric acid, hydrochloric acid, and nitric acid in diluted solutions. These results allow controlling the pore structure of glass foams for different applications. K E Y W O R D Sdensity, glass, glass foam, porous materials, sodium/sodium compounds

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“…This mixture is heated to a temperature at which the glass becomes a viscous liquid, and in turn, the additive decomposes and releases gases, which, unable to migrate to reach the surface, are trapped within the glass mass, thereby creating closed cells. As base glass, the use of waste glass of different natures has been reported, such as fluorescent tubes [ 21 ], cathode ray tubes [ 22 , 23 , 24 , 25 , 26 , 27 ], bottles [ 28 , 29 , 30 ], flat glass [ 31 ], float glass [ 27 ], calcosodic glass [ 26 , 32 , 33 ] and glass cullet [ 34 , 35 ]. For foaming additives, the use of several materials, such as alkaline or alkaline earth carbonates of both mineral origin [ 36 , 37 , 38 ] and animal origin, such as eggshell [ 21 , 22 , 29 , 39 ] or porcine bone [ 40 ]; NaOH [ 27 ]; SiC [ 31 , 35 , 41 ]; metallic oxides; graphite [ 41 , 42 , 43 ]; organic compounds, such as glycerin, gelatin, starch or saccharose [ 30 ]; and agro–food wastes, such as banana leaves [ 28 ] or tobacco residue [ 44 ], has been reported.…”

Section: Introductionmentioning

confidence: 99%

Glass Lightweight Aggregates from Glass Cullet and Mining and Food Industry Carbonate Waste

2022

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Lightweight aggregates are extensively used in construction and other industrial applications due to their technological characteristics. The extraction of natural aggregates results in serious environmental effects. Thus, within the circular economy concept, the valorization of waste through the optimization of materials and product design is encouraged. In this work, glass lightweight aggregates were prepared from mixtures of white glass cullet and carbonate wastes from mining (wastes originating from the extraction, manufacture and marketing of magnesite and its derivatives) and the food industry (eggshell and mussel shell). The effects of different processing parameters, such as the particle size of the base glass, percentage of the blowing additive, shaping method, heating rate, temperature and processing time, were evaluated. The results indicate that the mineralogical composition of the blowing agent and the particle size of the base glass are the two processing parameters with the greatest impact on expansion efficiency. Thus, glass artificial aggregates were obtained with characteristics similar to those of commercial products (density values ranged between 0.3 and 0.8 g/cm3 and mechanical strength between 0.7 and 1.5 MPa) from thermal shock expansion treatments in the temperature range 800–900 °C and with dwell times no longer than 15 min.

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The effect of clay on foaming and mechanical properties of glass foam insulating material

Cited by 19 publications

References 41 publications

Unconventional Technique Used to Manufacture Porous High-Strength Glass Foam

Unconventional Technique Used to Manufacture Porous High-Strength Glass Foam

Glass foams produced by glass waste, sodium hydroxide, and borax with several pore structures using factorial designs

Glass Lightweight Aggregates from Glass Cullet and Mining and Food Industry Carbonate Waste

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