Glass manufacturing involves abundant amount of natural resources including thermal energy and it is important to explore various ways to ultilize the used glass instead of direct disposal to landfill. One way to recycle the glass products is to crush them into cullets and mix the cullets into cement as filler/aggregate. In this study, the effects of recycled glass cullets (RGCs) with different sizes on the fire resistance performance of cementitious composite were studied. Cementitious composite samples were prepared with RGCs at 4 different sizes, i.e. below 0.6 mm, 0.6–1.18 mm, 1.18–2.36 mm and 2.36–4.75 mm. In order to evaluate the fire resistance of the composites with RGC, the composites samples were heated at different temperatures, and their residual strength, integrity and thermal conductivity were measured accordingly. Moreover, a specially designed furnace in accordance with modified BS 476-22 was employed to observe the thermal insulation and integrity of mortar panels under testing. The microstructure of RGCs mortar was observed under microscope and it was found that adding RGCs inside the composite improved the fire resistance of mortar. The beneficial effect of RGCs on fire resistance was found to reduce with increasing RGCs size, where RGCs finer than 0.6 mm showed the most significant beneficial effect. This is presumably attributed to the softening and state transformation of fine glass cullet at high temperature.

玻璃制造涉及包括热能在内的大量自然资源，因此探索各种方法来利用用过的玻璃而不是直接将其丢弃到垃圾填埋场很重要。回收玻璃产品的一种方法是将它们压碎成碎块，然后将碎块混入水泥中作为填料/骨料。在这项研究中，研究了不同尺寸的再生碎玻璃对水泥基复合材料耐火性能的影响。用RGC制备了4种不同尺寸的水泥基复合材料样品，分别小于0.6 mm，0.6-1.18 mm，1.18-2.36 mm和2.36-4.75 mm。为了评估带有RGC的复合材料的耐火性，将复合材料样品在不同温度下加热，并据此测量其残余强度，完整性和导热性。此外，根据改进的BS 476-22专门设计的熔炉用于观察被测砂浆板的隔热性和完整性。在显微镜下观察了RGC砂浆的微观结构，发现在复合材料内部添加RGC可以提高砂浆的耐火性。发现RGC对耐火性的有益作用随RGC尺寸的增加而降低，其中小于0.6mm的RGC显示出最显着的有益作用。据推测这归因于细玻璃碎片在高温下的软化和状态转变。在显微镜下观察了RGC砂浆的微观结构，发现在复合材料内部添加RGC可以提高砂浆的耐火性。发现RGC对耐火性的有益作用随RGC尺寸的增加而降低，其中小于0.6mm的RGC显示出最显着的有益作用。据推测这归因于细玻璃碎片在高温下的软化和状态转变。在显微镜下观察了RGC砂浆的微观结构，发现在复合材料内部添加RGC可以提高砂浆的耐火性。发现RGC对耐火性的有益作用随RGC尺寸的增加而降低，其中小于0.6 mm的RGC表现出最显着的有益作用。据推测这归因于细玻璃碎片在高温下的软化和状态转变。