Abstract

This work aims to study the effect of sodium silicate additive on the microstructure and physical properties of foam glass fabricated from the recycled soda–lime glass regarding the process temperature of 700 to 900°C. Sodium silicate was added as a cost-effective environmental foaming agent in 10 to 30 wt % to recycled soda–lime glass powder (maximum size of 63 μm), pressed and heat-treated for 30 min. X-ray diffraction, scanning electron microscopy, and thermogravimetry analysis were used to characterize the phase evolution, porosity, morphology, and the foam-forming ability, respectively. Bulk and true density, as well as flexural strength, were measured. The results showed that for samples containing 20 wt % water glass treated at 800°C, bulk density and strength values was 0.54 g/cm³ and 5.3 ± 0.7 MPa, Theses samples have higher strength than commercial foam glasses with uniformly distributed pores of 66.67% confirmed by the SEM images.

中文翻译：

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温度和水玻璃添加量对钠钙泡沫玻璃微观结构和物理性能的影响

摘要

本工作旨在研究硅酸钠添加剂对由回收钠钙玻璃制成的泡沫玻璃在 700 至 900°C 的工艺温度下的微观结构和物理性能的影响。将 10 至 30 重量％的硅酸钠作为一种经济高效的环保发泡剂添加到回收的钠钙玻璃粉末（最大尺寸为 63 微米）中，压制并热处理 30 分钟。X射线衍射、扫描电子显微镜和热重分析分别用于表征相演变、孔隙率、形貌和泡沫形成能力。测量体积和真密度，以及弯曲强度。结果表明，对于在 800°C 下处理的含有 20 wt% 水玻璃的样品，堆积密度和强度值为 0.54 g/cm ³ 和 5.3 ± 0.7 MPa，这些样品比商业泡沫玻璃具有更高的强度，SEM 图像证实了 66.67% 的均匀分布的孔隙。