- 秦永鉴1,黄凯健1,王元纲1,王爱国2,吴建生3
2020年3期 No.287 P1-5
摘要
引用本文
摘 要:选取钢纤维和玄武岩纤维进行试验,研究了两种纤维掺量以及硅灰掺量对超高强水泥基复合材料抗压抗折强度、疲劳性能以及体积收缩率的影响。结果表明,纤维和硅灰的加入能有效改善水泥基材料的力学及收缩性能,钢纤维对水泥基材料强度提升较大,但玄武岩纤维表现出与材料更好的相容性,1.5%钢纤维、0.1%玄武岩纤维改善效果最明显,抗折、抗压强度分别提高了12.6%、3.0%和21.2%、2.7%,体积收缩率降低了12.2%、5.4%,且1.5%钢纤维的疲劳寿命是不掺纤维的近4倍,最大跨中挠度曲线呈现明显的阶段性特征;8%硅灰改善效果最大,抗折、抗压强度分别提高了13.3%、10.4%,体积收缩率降低了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%.
秦永鉴,黄凯健,王元纲,等.超高强水泥基复合材料力学及收缩性能研究[J].混凝土与水泥制品,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.