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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

    層布式陶瓷纖維混凝土的抗折性能試驗研究
    層布式陶瓷纖維混凝土的抗折性能試驗研究
    • 肖 嫻1,高 林1,2,劉昆雄1,郭凱旋1
    2022年第4期
    摘要
    引用本文
    肖嫻,高林,劉昆雄,等.層布式陶瓷纖維混凝土的抗折性能試驗研究[J].混凝土與水泥制品,2022(4):46-49. XIAO X,GAO L,LIU K X,et al.Experimental Study on Flexural Properties of Laminated Ceramic Fiber Reinforced Concrete[J].China Concrete and Cement Products,2022(4):46-49.
    高溫后鋼纖維增強混凝土的空氣滲透性試驗研究
    高溫后鋼纖維增強混凝土的空氣滲透性試驗研究
    • 何佳歡1,韓 陽1,沈 雷2,陳家豪1,朱 德1,譚晗洋1
    2022年第4期
    摘要
    引用本文
    摘 ? 要:采用Torrent法研究了受熱溫度和鋼纖維摻量對高強混凝土空氣滲透系數和滲透深度的影響。結果表明:常溫下,在高強混凝土中分別摻入體積分數為1%和2%的鋼纖維后,試件的空氣滲透系數分別降低了約76%和55%;在鋼纖維摻量相同的情況下,隨著受熱溫度的升高,試件的空氣滲透系數和滲透深度均增大,150 ℃之后,空氣滲透系數和滲透深度的增大趨勢更加顯著;鋼纖維的摻入能夠顯著提升高強混凝土的抗滲性。 Abstract: The effects of heating temperature and steel fiber content on the air permeability coefficient and penetration depth of high-strength concrete were studied by the Torrent method. The results show that the air permeability coefficients of the specimens are reduced by about 76% and 55% respectively after adding steel fibers with a volume fraction of 1% and 2% into the high-strength concrete at room temperature. In the case of the same steel fiber content, with the increase of heating temperature, the air permeability coefficient and penetration depth of the specimen both increase, and the increase trend is more significant after 150 ℃. The incorporation of steel fiber can significantly improve the impermeability of high-strength concrete.
    何佳歡,韓陽,沈雷,等.高溫后鋼纖維增強混凝土的空氣滲透性試驗研究[J].混凝土與水泥制品,2022(4):50-54. HE J H,HAN Y,SHEN L,et al.Experimental Study on Air Permeability of Steel Fiber Reinforced Concrete After High Temperature[J].China Concrete and Cement Products,2022(4):50-54.
    玄武巖纖維與納米SiO2增強混凝土力學性能研究和微觀分析
    玄武巖纖維與納米SiO2增強混凝土力學性能研究和微觀分析
    • 黃 偉1,張陽陽1,葛進進2,方張平1
    2022年第4期
    摘要
    引用本文
    摘 ? 要:研究了單摻、復摻玄武巖纖維和納米SiO2對混凝土力學性能的影響,并采用掃描電子顯微鏡(SEM)分析了玄武巖纖維和納米SiO2的增強機理。結果表明:單摻玄武巖纖維時,混凝土的強度得到提高,且隨著玄武巖纖維長度的增加,抗折強度提高更明顯;單摻納米SiO2時,隨著納米SiO2摻量的增加,混凝土的抗壓、抗折強度逐漸增大;復摻玄武巖纖維與納米SiO2時,混凝土的抗壓、抗折強度均高于兩種材料分別單摻時的混凝土強度;SEM分析結果表明,納米SiO2在混凝土中起到了填充和成核作用,同時促進了水泥水化,生成了大量C-S-H凝膠和鈣礬石,這些水化產物將玄武巖纖維包裹在一起,在混凝土內部形成致密的三維網狀空間結構,從而提高了混凝土的強度。 Abstract: The effects of basalt fiber and nano-SiO2 on the mechanical properties of concrete were studied, and the strengthening mechanism of basalt fiber and nano-SiO2 was analyzed by scanning electron microscope(SEM). The results show that when basalt fiber is mixed alone, the strength of concrete is improved, and as the length of basalt fiber increases, the increase in flexural strength is more obvious. When nano-SiO2 is mixed alone, the compressive strength and flexural strength of concrete increase gradually with the increase of nano-SiO2 content. The compressive strength and flexural strength of concrete mixed with basalt fiber and nano-SiO2 are higher than those of concrete when the two materials are mixed separately. SEM results show that nano-SiO2 plays a role in filling and nucleation in concrete, and promotes the hydration of cement, generating a large number of C-S-H gel and ettringite. These hydration products wrap basalt fibers together, forming a dense three-dimensional network space structure inside concrete, thus improving the strength of concrete.
    黃偉,張陽陽,葛進進,等.玄武巖纖維與納米SiO2增強混凝土力學性能研究和微觀分析[J].混凝土與水泥制品,2022(4):55-58,63. HUANG W, ZHANG Y Y,GE J J,et al.Experimental Study and Microscopic Analysis of the Mechanical Properties of Basalt Fiber and Nano-SiO2 Reinforced Concrete[J].China Concrete and Cement Products,2022(4):55-58,63.
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