花岗岩石粉用量对超高性能混凝土性能与碳排放的影响

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中图分类号：TU528 文献标志码：A 文章编号：2095-2945（2025）31-0053-04

Abstract：In this the experiment， 10% silica fume， 5% silica fume +5% cement，and 10% cement were replaced with granite stonpowder（GS），espectivelyntheectofGSPonecompresierengthssink，microstructureandnviometalit of ultra-high performance concrete（UHPC）.The research results show that when GSP replaces 5% cement +5%g silica fume，the 28-day compressive strength is increased by 8.2% compared with the benchmark group，and the microstructure is denser. However，whenGSPreplacescementinlargequantities，thecompresivestrengthofUHPCdecreases.Atthesametime，ading appropriate amount of GSP can significantly reduce the shrinkage of UHPC specimens. When GSP replaces 5% silica fume +5% （20号 cement，theauto-shrinkage and drying shrinkage of UHPC specimens during 18O daysare reduced by 15.4% and 35.3% （204 respectively.Inadition，thereductionintheamountofcementandsilicafumecanalsoreducetheproductioncostof UHPC， reduce carbon emissions，and is conducive to the production of sustainable and environmentall friendly UHPC.

Keywords：ultra-ighperformanceconcrete；granitepowder，compresivestrength；shrinkage;；microstructure;carboneisions

超高性能混凝土（UHPC）是一种具有优异性能的先进水泥基材料。（剩余4935字）