الفهرس 
Chapter 1Only 14 pages are availabe for public view
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Abstract
This research deals with an effective method for producing ultra-high-performance concrete (UHPC) that is environmentally friendly and economical by including recycled waste glass powder (RWGP) in this study. RWGP was obtained from grinding recycled glass waste and reaching a fineness close to that of cement. Then, RWGP was gradually used as a replacement for cement and quartz powder. Eco-UHPC mixtures were designed based on a modified Andreasen & Andersen (MAA) particle packing model. UHPC with low cement content (450 kg/m3) was produced by optimizing the binder system. The embodied CO2 index of C/RWGP50% has been reduced to 3.7 kg/MPa/m3, while the embodied CO2 for conventional UHPC ranged to 5.75 kg/MPa/m3. The Eco-UHPC interfacial transition zone (ITZ) is improved when cement and quartz powder are replaced with RWGP. Ultimately, the environmental and economic assessment proved that the RWGP can reduce the production cost of UHPC by 9% without deteriorating its performance. The results showed that the inclusion of 10% RWGP as a cement replacement achieves the highest mechanical properties at different ages. By that, the microstructure and durability of Eco-UHPC have been developed at 50% of RWGP, which provides wide opportunities for the continuous future development of Eco-UHPC. Microstructural measurements using Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), and Thermogravimetric Analysis (TGA) confirm the role of recycled waste glass powder in densifying the microstructure, reducing calcium hydroxide content as well as producing more C-S-H, which improves the strength and reduces the water absorption of UHPC.