![]() It is challenging for researchers and environmentalists to find an alternative to traditional OPC concrete and manage or dispose of these industrial wastes. Further, an enormous amount of waste is produced from different industries, such as slag from steel or iron industries, ceramic wastes from ceramic industries, red mud from alumina industries, and fly ash from thermal power plants. According to a study, one ton of carbon dioxide is released into the environment during the production of one ton of cement. The ordinary Portland cement is manufactured by the consumption of fuel and conversion of raw materials, during which an enormous amount of CO 2 is released into the atmosphere. Ordinary Portland cement concrete (OPC) is the most important material generally used in all construction activities. There has been a significant increase in construction activities around the globe to fulfill the growing infrastructural needs. Furthermore, the microstructure characterization of QRD blended GPC mixes were also carried out by performing scanning electron microscopy (SEM), X-ray diffraction (XRD), and energy dispersive spectroscopy (EDS). The results also showed that under elevated temperatures up to 800 ☌, the weight loss of QFS-GPC specimens persistently increased with a consistent decrease in the residual compressive strength for increasing QRD content and temperature. ![]() The optimal mixture of QRD incorporated FA-SG-based GPC (QFS-GPC) was observed with 15% QRD and 0.75% steel fibers contents considering the performance in workability and mechanical properties. However, further addition of steel fibers at 1.5% by volume lowered the mechanical strength properties. Incorporating steel fibers in a fraction of 0.75% by volume increased the compressive, tensile, and flexural strength of GPC mixes by 15%, 23%, and 34%, respectively. In contrast, more than 15% of QRD contents resulted in decreasing the mechanical strength properties. The test results showed that the mechanical strength of GPC mixes (without steel fibers) increased by 6–11%, with an increase in QRD content up to 15% at the age of 28 days. The specimens were also heated up to 800 ☌ to evaluate the resistance of specimens to elevated temperature in terms of residual compressive strength and weight loss. The mechanical properties of specimens, i.e., compressive strength, splitting tensile strength, and flexural strength, were determined by testing cubes, cylinders, and prisms, respectively, at different ages (7, 28, and 56 days). ![]() ![]() The slag was replaced by different proportions of QRD in fly ash, and SG-based GPC mixes to study the effect of QRD incorporation. In this study, a total of 18 different mix proportions were designed with different proportions of QRD (0%, 5%, 10%, 15%, and 20%) and steel fibers (0.75% and 1.5%). The multiphysical models show that the inclusion of steel fibers and binders can enhance the mechanical properties of GPC. Such types of ternary mixes were prepared by blending waste materials from different industries, including QRD, SG, and FA, with alkaline activator solutions. The purpose of this research is to study the effects of quarry rock dust (QRD) and steel fibers (SF) inclusion on the fresh, mechanical, and microstructural properties of fly ash (FA) and ground granulated blast furnace slag (SG)-based geopolymer concrete (GPC) exposed to elevated temperatures.
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