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    蘇州混凝土水泥制品研究院有限公司

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    纖維水泥及制品

    PVA纖維分散性及纖維混凝土彎曲韌性試驗研究
    PVA纖維分散性及纖維混凝土彎曲韌性試驗研究
    • 鄧宗才1,趙連志2,丁建明1,賀少鋒1
    2021年第8期
    摘要
    引用本文
    摘 ? 要:提出了一種新型纖維混凝土拌和工序和評價纖維分散性的簡易方法,并研究了不同摻量PVA纖維對混凝土力學性能和彎曲韌性的影響。結果表明:新型拌合工序可以有效降低對纖維的損傷,有助于纖維在混凝土中均勻分散;當纖維摻量為4.5 kg/m3和7.5 kg/m3時,纖維分散性較好,而當纖維摻量為10.5 kg/m3時,纖維分散性欠佳;隨著PVA纖維摻量的增加,混凝土的抗壓、抗拉強度先增后減,彎拉強度和韌性耗能能力逐漸增強。 Abstract: A new mixing process of the fiber-reinforced concrete and a simple method for evaluating fiber dispersion were put forward, and the effects of different contents of PVA fiber on the mechanical properties and flexural toughness of concrete were studied. The results show that the new mixing method can effectively reduce the damage to the fiber and help the fiber disperse evenly in the concrete. When the fiber content is 4.5 kg/m3 and 7.5 kg/m3, the fiber dispersion is better, but the fiber dispersion is unsatisfactory when the fiber content is 10.5 kg/m3. With the increase of PVA fiber content, the compressive strength and tensile strength increase first and then decrease, and the flexural tensile strength and the toughness energy dissipation capacity gradually increase.
    鄧宗才,趙連志,丁建明,等.PVA纖維分散性及纖維混凝土彎曲韌性試驗研究[J].混凝土與水泥制品,2021(8):49-53. DENG Z C,ZHAO L Z,DING J M,et al.Experimental Study on PVA Fiber Dispersion and Bending Toughness of Fiber Reinforced Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(8):49-53.
    復摻纖維和?;⒅閷駸岘h境下混凝土性能的影響
    復摻纖維和?;⒅閷駸岘h境下混凝土性能的影響
    • 呂家棟1,趙立財1,2
    2021年第8期
    摘要
    引用本文
    摘 ? 要:研究了復摻鋼纖維、聚丙烯纖維和?;⒅閷炷量箟盒阅艿挠绊?,通過微觀定量方法描述了混凝土孔隙結構與抗壓性能之間的關系,結合聲發射技術分析了濕熱環境下混凝土的壓縮破壞特征。結果表明:復摻鋼纖維、聚丙烯纖維和?;⒅榛炷猎诟骷墱囟认碌目箟簭姸染罡?,且隨溫度上升的強度損失率最低;復摻鋼纖維、聚丙烯纖維和?;⒅榛炷恋目紫堵屎涂紫斗中尉S數與抗壓強度有良好的非線性關系;復摻鋼纖維、聚丙烯纖維和?;⒅榭墒够炷恋钠茐男问綇囊詮埨茐臑橹鬓D變為以剪切破壞為主。 Abstract: The effects of steel fiber, polypropylene fiber and vitrified beads on the compressive performance of concrete were studied, and the relationship between pore structure and compressive performance of concrete was described by microscopic quantitative method, and the compression failure characteristics of concrete under hot-humid environment were studied. The results show that the compressive strength of the concrete mixed with steel fiber, polypropylene fiber and vitrified beads is the highest at all temperatures, and the strength loss rate with the increase of temperature is the lowest. The porosity and fractal dimension of the concrete mixed with steel fiber, polypropylene fiber and vitrified beads have good nonlinear relationship with compressive strength. The addition of steel fiber, polypropylene fiber and vitrified beads can change the concrete failure mode from tensile failure to shear failure.
    呂家棟,趙立財.復摻纖維和?;⒅閷駸岘h境下混凝土性能的影響[J].混凝土與水泥制品,2021(8):54-58. LYU J D,ZHAO L C.Effects of Composite Fiber and Vitrified Beads on the Performance of Concrete in Hot-humid Environment[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(8):54-58.
    基于響應面法的玄武巖纖維再生混凝土力學性能分析
    基于響應面法的玄武巖纖維再生混凝土力學性能分析
    • 陳興祥,譚 燕,童 瑤,張維維
    2021年第8期
    摘要
    引用本文
    摘 ? 要:基于Design Expert軟件,采用響應面法(RSM)分析了玄武巖纖維(BF)長度和體積摻量對再生粗骨料替代率為20%的玄武巖纖維再生混凝土(BFRAC)力學性能的影響。結果表明:BF體積摻量對BFRAC力學性能的影響程度大于BF長度;對于抗折強度、劈裂抗拉強度和抗壓強度,對應的BF最佳摻量分別為0.2%、0.1% 和0.2%。 Abstract: Based on Design Expert software, the response surface method(RSM) was used to analyze the influence of basalt fiber (BF) length and volume content on the mechanical properties of basalt fiber recycled concrete(BFRAC) with 20% replacement rate of recycled coarse aggregate. The results show that BF volume content has a greater influence on the mechanical properties of BFRAC than that of BF length. For the flexural strength, split tensile strength and compressive strength of BFRAC, the corresponding optimal BF content is 0.2%, 0.1% and 0.2%, respectively.
    陳興祥,譚燕,童瑤,等.基于響應面法的玄武巖纖維再生混凝土力學性能分析[J].混凝土與水泥制品,2021(8):59-63. CHEN X X,TAN Y,TONG Y,et al.Analysis of Mechanical Properties of Basalt Fiber Recycled Concrete Based on Response Surface Method[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(8):59-63.
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