Influence of Sintering on Thermal, Mechanical and Technological Properties of Glass Foams Produced from Agro-Industrial Residues

Fernandes, Fernando Antônio da Silva; Costa, Dayriane do Socorro de Oliveira; Rossignolo, João Adriano

doi:10.3390/ma15196669

Cited by 11 publications

(17 citation statements)

References 55 publications

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“…Different measurement techniques were used to measure the thermal conductivity of the insulation materials, in which their accuracy varied depending on the steady-state and transient-state methods of measuring thermal conductivity [50]. In the case of foam glass aggregates, mostly the transient line source method [5,44,51,52], heat flow meter [43,45,53], or guarded hot plate method [31,40] were used.…”

Section: Thermal Conductivity Measurementsmentioning

confidence: 99%

“…Studying the thermal conductivity of foam glass aggregates is crucial for their insulating performance and usability in the building industry. To obtain the thermal performance of foam glass aggregates, researchers used different measurement methods to test the thermal conductivity through lab-and field-experimental measurements [5,31,[39][40][41][42][43][44][45].…”

Section: Introductionmentioning

confidence: 99%

“…Due to the availability of high demands on roads caused by frost actions which led to severe problems, Øiseth et al [28] conducted a comparative field test for four different types of materials, including FGA, and the thermal conductivity of FGA was about 0.155 W/m.K at 10 °C when the typical loose bulk density was between 180 and 250 kg/m 3 , and the moisture content was Studying the thermal conductivity of foam glass aggregates is crucial for their insulating performance and usability in the building industry. To obtain the thermal performance of foam glass aggregates, researchers used different measurement methods to test the thermal conductivity through lab-and field-experimental measurements [5,31,[39][40][41][42][43][44][45].…”

Section: Introductionmentioning

confidence: 99%

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Thermal Performance of Foam Glass Aggregate at Different Compaction Ratios

2023

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The use of glass waste in the construction industry has a high potential of leading to a higher recycling percentage. Foam glass aggregate (FGA) is around 98% recycled glass waste of various origins and has good insulation properties with big grain size distributions ranging between 10 mm and 60 mm. FGA has a wide range of applicability in the construction industry, which significantly differs from each implementation in the case of built-in conditions of the material. Therefore, investigating the impact of different compaction ratios, temperature, and relative humidity conditions on the thermal performance of such material is very important. In the present work, the samples of foam glass aggregates have been prepared with four different compaction ratios (10%, 20%, 30%, and 40%) to measure their impact on the material’s mechanical and thermal insulation properties. The obtained results revealed that the dry density property of the material linearly increased with elevated compaction ratios. In contrast, the submergence density did not follow the same trend behaviour under the same circumstances. The vertical strain of the foam glass aggregates decreased with increased compaction ratios, and a significant correlation behaviour was observed between the vertical strain and increased compaction ratios at high compressional loads. The material’s thermal conductivity increased with increasing compaction ratios in both 50% relative humidity and 95% relative humidity, while for the submergence condition, a significant decrease in their values was observed after compacting the material by 40%. The thermal conductivity is tested at 10 °C and 30 °C using the TLS and GHP methods. The thermal resistance of foam glass aggregate layers was calculated based on the measured results, showing an approximately linear decreasing trend with increasing compaction ratios. While the submerged foam glass aggregate samples demonstrated stable thermal resistance values at 30% compaction, by raising the compaction ratio to 40%, the material’s thermal resistance increased once again. The experimental results also found the temperature conversion coefficients, which can be used to convert the compacted FGA materials’ thermal conductivity to the temperature experienced in a different built-in state than the laboratory measurements. Our study demonstrates the broad usability of foam glass aggregate as a compacted thermal insulating layer in the building industry.

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Section: Thermal Conductivity Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal Performance of Foam Glass Aggregate at Different Compaction Ratios

2023

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“…In this scenario, the Circular Economy emerges as a viable model. It emphasizes the recovery and utilization of food waste [5], promotes the use of renewable resources, and supports the recycling of waste into new materials, thereby keeping them in the economic loop far longer than traditionally expected [6][7][8]. This approach not only extends the life cycle of materials but also significantly reduces pollution from production processes and improper disposal, effectively decoupling economic growth from environmental degradation [6].…”

Section: Introductionmentioning

confidence: 99%

Production of Glass Foam in a Microwave Oven Using Agro-Industrial Waste as Raw Material

Fernandes,

Rossignolo

2024

Buildings

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Climate change is characterized by shifts in temperature and climate patterns. Constructing new high-rise environments using materials that incorporate agro-industrial waste can help mitigate this impact without compromising technological properties. This study produced vitreous foams intended to replace natural aggregates in lightweight concrete partially. These foams were sintered in a microwave oven at temperatures of 750 °C, 800 °C, and 850 °C, utilizing glass powder and sugarcane bagasse ash as raw materials. The homogenization and preparation of these materials were conducted through a mechanical pelletization process, employing a constant rotation engine at approximately 40 rpm. The efficacy of microwave sintering was assessed by comparing the outcomes with those from sintering in a conventional electric muffle furnace under identical conditions. The results indicated that the microwave-sintered vitreous foams exhibited the following values for apparent density (≤0.30 g/cm³), porosity (86% to 94%), and compressive strength (0.48 MPa to 0.58 MPa), which align with the global standards for commercial vitreous foams. The microwave sintering route proved to be economically feasible by reducing sintering time and, consequently, energy costs, without sacrificing technological properties. The materials produced in this study offer a promising solution to minimize the environmental impact associated with constructing new buildings, particularly tall structures. Additionally, they support the circular economy by converting waste into valuable by-products.

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“…One of these kinds of materials are natural fibers of vegetable/lignocellulosic origin, used as a reinforcement in a polymeric matrix, which result in materials with good mechanical properties that are suitable substitutes for synthetic fibers, such as glass and carbon fibers [ 15 ]. In general, the use of fibers produced from the addition of agroenergy residues as reinforcement in composites offers a low-cost and environmentally correct solution for the disposal of residues, in addition to the possibility of obtaining profits [ 16 ] and promoting the circular economy and bioeconomy that have been implemented as alternative models of economic production to encourage sustainable growth and development [ 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Production of Biodegradable Polymeric Composites with the Addition of Waste

da Silva Fernandes,

Serra,

de Oliveira Costa

et al. 2023

Materials

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Several solutions have been presented to minimize the environmental impact generated by polymers produced from petroleum resources. This work produced a biopolymer using glycerol, starch (<5) and macaúba epicarp fiber (10–15–20–25–30%) as reinforcement. The interaction of glycerol with starch was favored by the addition of acetic acid (CH3COOH). The pH was adjusted with sodium hydroxide (NaOH) at a concentration of 0.1 mol·L−1. The characterization was carried out through scanning electron microscopy (SEM), infrared reflectance—FTIR, water solubility, biodegradability and technological properties. Through the results obtained in this work, it is observed that the tensile strength and modulus of elasticity are influenced by the addition of the fiber concentration; the sample that received a 30% addition presented 19.17 MPa and 348.12 MPa, respectively. All samples showed low solubility in water and low density, in addition to a high rate of degradability in soil with mass loss corresponding to 59% over a period of three months. The results of this investigation are satisfactory for the production of materials that can be used in everyday life, replacing conventional plastic.

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Influence of Sintering on Thermal, Mechanical and Technological Properties of Glass Foams Produced from Agro-Industrial Residues

Cited by 11 publications

References 55 publications

Thermal Performance of Foam Glass Aggregate at Different Compaction Ratios

Thermal Performance of Foam Glass Aggregate at Different Compaction Ratios

Production of Glass Foam in a Microwave Oven Using Agro-Industrial Waste as Raw Material

Production of Biodegradable Polymeric Composites with the Addition of Waste

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