Acoustic　emission　(AE)　technology　is　widely　used　in　structural　health　monitoring.　Glass　sand　(GS)　made　from　waste　glass　is　a　promising　replacement　aggregate　for　quartz　sand　(QS)　in　ultra-high　performance　concrete　(UHPC).　This　paper　addresses　the　effects　of　different　factors　including　water-binder　ratio,　length　of　basalt　fiber　(BF)　and　ratio　of　GS　replacing　QS　on　the　fluidity　and　flexural　strength　of　UHPC　notched　beam　under　four-point　flexural　loads.　Meanwhile,　the　fracture　characteristics　of　UHPC　notched　beam　were　characterized　through　acoustic　emission　(AE)　technique.　The　results　show　that　water-binder　ratio　and　replacement　ratio　of　GS　present　a　positive　correlation　with　work　performance　of　UHPC,　while　length　of　BF　exhibits　a　negative　one.　The　flexural　strength　of　UHPC　notched　beams　can　be　improved　by　the　decrease　of　the　water-binder　ratio　and　fiber　length.　The　effect　of　water-binder　ratio　on　flexural　strength　is　the　most　significant,　while　the　addition　of　GS　presents　the　minimum　one.　The　fracture　characteristics　of　UHPC　notched　beams　could　be　favorably　characterized　by　AE　parameters.　Through　the　analysis　and　comparison　of　the　evolution　of　AE　parameters,　the　differences　in　fracture　properties　of　UHPC　notched　beams　with　different　flexural　strengths　can　be　realized.　Through　this　study,　the　fluidity　and　flexural　performance　of　UHPC　produced　by　replacing　QS　with　GS　were　demonstrated,　which　is　beneficial　to　the　cleaner　production　of　UHPC.　Meanwhile,　the　AE　technique　presented　great　potential　for　fracture　characterization　of　UHPC　notched　beam,　which　also　provided　a　promising　method　for　real-time　monitoring　of　cracking　in　the　diagnosis　of　UHPC　structures.