“…Silica fume is an essential ingredient of UHPC which increases packing due to their nano size nature, but also further enhance the bond between the cement paste and aggregate particles through their hydration reaction with cements [88]. Further information concerning miscellaneous aerogel investigations, also including aerogel windows, may be found in the available literature [89][90][91][92][93][94][95][96][97][98][99][100][101][102].…”