后续水化对掺矿渣粉高强混凝土性能的影响

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中图分类号：TU528.31 文献标识码：A DOI：10.7535/hbkd.2026yx01003

Abstract： Aiming at the problems ofexpansion and cracking that may ocur in high-strength concrete（HSC） serving in longterm humid or water environments，theinfluenceof further hydrationon HSC property was studiedby simulation test. Firstly，the influenceof slag powdercontentonthephysicaland mechanical propertiesand permeabityofHSCwas discussed. Secondly，theinfluence mechanismoffurtherhydrationonthe strengthofconcrete withor without slag powder wasanalyzed.Finalytheinfluenceofloadingdegreeonthestrengthofpre-damageconcretewasexpounded.Theresultsshowthatthe variationrangesof thecompresive strength and ultrasonic sound velocity valuefor concretes withor without slag powderare both notobvious，whilethe decreased degreeof the electricfluxfirstdecreases and then increases withan increasein the slag powdercontent.Thedecreaseddegreeof compressivestrength firstincreasesand then decreaseswith anincrease in loading degreeand moreover，the increase in spliting tensile strength showsan increasing trend.The further hydration products continuouslyfilltheinitialcracksofpre-damageconcrete.Whentheinternalspaceofconcreteisnotsuficienttoacommodate theproducts，thevolumeexpansionof products leads totheformationof microcracksandadecrease instrength.However， during thelate stageoffurtherhydration，thenew microcracksprovidechannels for theentryof extraneous wateragain，and the new productsfilits internalporesanddefects.Thisultimatelycausesanicreaseinstrength.Theinfluencelawsof slag powderandloading degree onthe performanceof HSCunderfurtherhydration efect areput forward，which provides some reference for the performance evaluation and design of HSC.

Keywords：nonmetalic building material；high-strengthconcrete；further hydration；slag powder；loading degree；strength

随着服役环境的多样化，现代混凝土朝着高强、高耐久的方向发展。（剩余11399字）