纳米二氧化硅改性碳纤维水泥基复合材料的界面性能研究

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中图分类号：TU528 文献标志码：A 文章编号：2095-2945（2025）34-0053-04

Abstract：Theinterfacial propertiesofnano-silicamodifiedcarbon fibercement-basedcompositeswereinvestigatedby comparativetestmethod.Usingordinarycarbonfiberasthebasicmaterial，nano-silicamodfedcarbonfiberwasobtainedaftera seriesoftreatmentssuchassurfacecoatingremovalandnitricacidoxidation.Samplesweremadeofcarbonfiberand modified carbonfiberrespectivelyandsubjectedtomonofilamentpull-outtests.A"oad-displacement"relationshipcurvewasdrawbased onthetestdata.Thetestresultsshowthatcomparedwiththeunmodifiedcarbonfiber，thedebondingloadofcarbonfiber modifiedwithnano-slicaissignificantlygreaterunderthesamedisplacement，indicatingthatthemodifiedcarbonfiberhas strongerinterfacialstrength.Theinterfacemorphologyoftheunmodifiedcarbonfiberandthemodifiedcarbonfibercement-based compositewasobservedusingascaningelectronmicroscope.Underthelens，itwasclearlyseenthatanumberofcement hydrationproductsgrewattheinterfacejunctionbetweenthemodifiedcarbonfiberandthecementmatrix，fulyfilingthe interface，idicatingthatitsbondstrengthishgher，whichisonsistentwiththeconclusionofthemonoflamentpullouttest.

Keywords：nano-silica;modifiedcarbonfiber;interfacialproperty；monofilamentpullouttest;compositematerials

高层及超高层建筑的建设，对混凝土的综合性能提出了更高的要求。（剩余4725字）