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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

    混雜纖維輕骨料混凝土力學性能試驗研究
    混雜纖維輕骨料混凝土力學性能試驗研究
    • 張 萌1,駱文進2
    2021年第5期
    摘要
    引用本文
    摘 ? 要:針對當前高層建筑物中普通混凝土自重大,而輕骨料混凝土強度較普通混凝土低的現狀,以不同玄武巖纖維體積率(Vb)、聚丙烯纖維體積率(Vp)和陶粒代取代率(Rc)為影響因素,利用正交試驗法設計了9組混雜纖維輕骨料混凝土(HF-LWC),進行了抗壓強度、抗折強度和劈裂抗拉強度試驗,并基于試驗結果建立了強度預測模型。結果表明:三種因素對抗折強度的提升幅度大于對抗壓強度和劈裂抗拉強度的提升幅度,最大增幅為45.23%;隨著Vb的增加,HF-LWC的強度逐漸增大,且Vb對HF-LWC強度的影響最顯著;當Vb為0.2%、Vp為0.1%、Rc為10%時,HF-LWC強度最佳;擬合得出的HF-LWC抗壓強度、抗折強度和劈裂抗拉強度模型的精度較高。 Abstract: In view of the current situation that the self-weight of ordinary concrete in high-rise buildings, and the strength of lightweight aggregate concrete is lower than that of ordinary concrete. Taking different basalt fiber volume ratio (Vb), polypropylene fiber volume ratio (Vp) and ceramsite replacement rate(Rc) as influencing factors, 9 groups of hybrid fiber lightweight aggregate concrete (HF-LWC) were designed by orthogonal test method, and the compressive strength, flexural strength and split tensile strength tests were carried out, and the strength predictive models were established based on the test results. The results show that the increase in flexural strength of the three factors is greater than the increase in compressive strength and split tensile strength, with the maximum increase of 45.23%. With the increase of the basalt fiber volume ratio, the strength of HF-LWC gradually increases, and the basalt fiber volume ratio has the most significant influence on the strength of HF-LWC. When the basalt fiber volume ratio is 0.2%, polypropylene fiber volume ratio is 0.1% and ceramsite replacement rate is 10%, the strength of HF-LWC is the best. The accuracy of HF-LWC compressive strength, flexural strength and splitting tensile strength models are high.
    張萌,駱文進.混雜纖維輕骨料混凝土力學性能試驗研究[J].混凝土與水泥制品,2021(5):48-52. ZHANG M,LUO W J.Experimental Study on Mechanical Properties of Hybrid Fiber Lightweight Aggregate Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):48-52.
    鋼棉對超高性能混凝土(UHPC)性能的影響研究
    鋼棉對超高性能混凝土(UHPC)性能的影響研究
    • 周南南
    2021年第5期
    摘要
    引用本文
    周南南.鋼棉對超高性能混凝土(UHPC)性能的影響研究[J].混凝土與水泥制品,2021(5):53-55. ZHOU N N.Study on the Influence of Steel Wool on the Performance of Ultra-high Performance Concrete(UHPC)[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):53-55.
    PVA纖維混凝土力學性能增長規律研究
    PVA纖維混凝土力學性能增長規律研究
    • 曹雅嫻1,侯慧芳2,劉曙光3,趙建軍3a,徐勇彪4
    2021年第5期
    摘要
    引用本文
    摘 ? 要:研究了PVA纖維長度和體積摻量對軸心抗壓強度和抗折強度的影響,并采用灰色理論模型分析了軸心抗壓強度和抗折強度隨齡期的變化規律。結果表明:PVA纖維的摻入在一定程度上改善了混凝土的軸心抗壓強度和抗折強度;非等時距GM(1,1)模型的預測精度較高。 Abstract: The effects of PVA fiber length and volume content on the axial compressive strength and flexural strength were studied, and the gray theory model was used to analyze the variation of axial compressive strength and flexural strength with age. The results show that PVA fiber can improve the axial compressive strength and flexural strength of concrete to a certain extent, and the non-equal interval GM (1,1) model has high prediction accuracy.
    曹雅嫻,侯慧芳,劉曙光,等.PVA纖維混凝土力學性能增長規律研究[J].混凝土與水泥制品,2021(5):56 -59. CAO Y X,HOU H F,LIU S F,et al.Study on the Growth Law of Mechanical Properties of PVA Fiber Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTES,2021(5):56 -59.
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