 The use of polypropylene fibers and nanosilica has been shown to improve the performance of ultra-high-strength geopolymer concrete, UHSGPC, making it suitable for use as an alternative material for Portland cement-based concrete. Polypropylene fibers increase the strength of the concrete while nanosilica improves the durability of the concrete under extreme temperatures. This article was authored by Fadi Althoi, Osama Zayed, Salah Al-Salamiy and others.