In this work, discarded glass bottles (GB) and eggshells (ES) were used to produce foam glass designed for thermal insulation. The literature on the thermal conductivity of foam glasses produced with eggshells is sparse. This material was used as pore‐forming agent at 3% and 5% weight fractions to obtain a foam glass with low thermal conductivity. Homogenized powders were uniaxially pressed, and the compacts were fired at three temperatures (800, 850, and 900°C). Raw materials were characterized by chemical analysis and particle size distribution. The foam glasses were characterized by their porosity, phases, compressive strength, and thermal conductivity. The best insulating properties were obtained for the composition containing 5 wt% ES fired at 800°C. This sample displayed a porosity of 91.4% while its thermal conductivity was of 0.037 W/m.K, with a compressive strength of 1.12 ± 0.38 MPa. Crystalline phases were observed in samples fired at 850 and 900°C as a result of the devitrification process. The final properties of the materials are comparable to those of commercial foam glasses obtained from non‐renewable, more expensive raw materials, a great indicator that the studied compositions could be used as an environmentally friendly substitute.

中文翻译：

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蛋壳作为玻璃泡沫中CaCO3的农业工业废物替代品：获得较低热导率的研究

在这项工作中，使用了废弃的玻璃瓶（GB）和蛋壳（ES）来生产用于隔热的泡沫玻璃。关于用蛋壳生产的泡沫玻璃的导热性的文献很少。将该材料以3％和5％的重量分数用作造孔剂，以获得具有低导热率的泡沫玻璃。将均质化的粉末单轴压制，然后在三个温度（800、850和900°C）下烧制压块。通过化学分析和粒度分布来表征原材料。泡沫玻璃的特征在于其孔隙率，相，抗压强度和热导率。对于在800℃下焙烧的含有5wt％ES的组合物，获得了最佳的绝缘性能。该样品的孔隙率为91.4％，而热导率为0.037 W / mK，抗压强度为1.12±0.38 MPa。由于失透过程的结果，在850和900°C的温度下燃烧的样品中观察到了结晶相。该材料的最终性能可与从不可再生，更昂贵的原材料获得的商用泡沫玻璃相媲美，这很好地表明了所研究的组合物可以用作环保替代品。