- 秦永鑒1,黃凱健1,王元綱1,王愛國2,吳建生3
2020年3期 ? No.287 ? P1-5
摘要
引用本文
摘??要:選取鋼纖維和玄武巖纖維進行試驗,研究了兩種纖維摻量以及硅灰摻量對超高強水泥基復合材料抗壓抗折強度、疲勞性能以及體積收縮率的影響。結果表明,纖維和硅灰的加入能有效改善水泥基材料的力學及收縮性能,鋼纖維對水泥基材料強度提升較大,但玄武巖纖維表現出與材料更好的相容性,1.5%鋼纖維、0.1%玄武巖纖維改善效果最明顯,抗折、抗壓強度分別提高了12.6%、3.0%和21.2%、2.7%,體積收縮率降低了12.2%、5.4%,且1.5%鋼纖維的疲勞壽命是不摻纖維的近4倍,最大跨中撓度曲線呈現明顯的階段性特征;8%硅灰改善效果最大,抗折、抗壓強度分別提高了13.3%、10.4%,體積收縮率降低了28.8%。?Abstract:?Steelfiberandbasaltfiberwereselectedforexperiment,andtheeffectsoftheamountoftwofibers,theamountofsilicafumeonthecompressiveandflexuralstrengthandvolumeshrinkageofultra-highstrengthcementitiouscompositeswereexplored.Theresultsshowthattheadditionoffiberandsilicafumecaneffectivelyimprovethemechanicalandshrinkagepropertiesofcementitiouscomposites.Steelfiberhasgreatimprovementinstrengthforcementitiouscomposites,butbasaltfiberexhibitsbettercompatibilitywithmaterials.1.5%steelfiberor0.1%basaltfiberhasthegreatestimprovementforthecementitiousproperty,andtheflexuralandcompressivestrengthsareincreasedrespectivelyby12.6%,3.0%and21.2%,2.7%,respectively.Thevolumeshrinkagerateisreducedrespectivelyby12.2%and5.4%.Thefatiguelifeofthespecimenswith1.5%steelfiberisnearly4timesthatofthespecimenwithoutfiber,andthemaximummid-spandeflectioncurveshowsobviouslycharacteristicsofstages.8%silicaashhasthegreatestimprovementeffect.Theflexuralandcompressivestrengthincreasedrespectivelyby13.3%and10.4%,andthevolumeshrinkagerateisdecreasedby28.8%.
秦永鑒,黃凱健,王元綱,等.超高強水泥基復合材料力學及收縮性能研究[J].混凝土與水泥制品,2020(3):1-5.
QIN Y J,HUANG K J,WANG Y G,et al.Mechanical and Shrinkage Properties of Ultra-high Strength Cement Composites[J].China Concrete and Cement Products,2020(3):1-5.
QIN Y J,HUANG K J,WANG Y G,et al.Mechanical and Shrinkage Properties of Ultra-high Strength Cement Composites[J].China Concrete and Cement Products,2020(3):1-5.