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    蘇州混凝土水泥制品研究院有限公司

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    納米碳纖維改性混凝土的力學性能及微觀機理
    Mechanical Properties and Micromechanism of Concrete Modified by Carbon Nanofibers
    2020年1期 ? No.285 ? P51-54
    納米碳纖維;抗壓強度;抗折強度;劈裂強度;改性機理
    Carbon nanofiber; Compressive strength; Flexural strength; Splitting strength; Modification mechanism
    2020年1期 No.285 P51-54
    10.19761/j.1000-4637.2020.01.051.04
    黑龍江省交通運輸廳重點科技項目(JTZD-20181826)
    王麗霖1,林 雪2,3
    1.鄭州工程技術學院土木工程學院,450000;2.東北林業大學工程技術學院,哈爾濱 150040;3.黑龍江東方學院,哈爾濱 150066

    王麗霖1,林 雪2,3

    王麗霖,林雪.納米碳纖維改性混凝土的力學性能及微觀機理[J].混凝土與水泥制品,2020(1):51-54.

    WANG L L, LIN X.Mechanical Properties and Micromechanism of Concrete Modified by Carbon Nanofibers [J].China Concrete and Cement Products,2020(1):51-54.

    瀏覽量:
    1000
    摘要:采用不同摻量的納米碳纖維制備混凝土,測試了納米碳纖維改性混凝土的抗壓強度、抗折強度和劈拉強度,并對其改性機理進行了探究。結果表明,適量的納米碳纖維能夠提高混凝土的力學性能。當摻量為0.3%時,納米碳纖維改性混凝土的力學性能最優,其抗壓強度、抗折強度和劈拉強度相較于素混凝土分別提高了9.2%、13.2%和17.5%。SEM測試結果表明,納米碳纖維能夠在混凝土內部形成立體網狀結構,改善混凝土的微觀形貌特征,增強混凝土的韌性和整體性,填充混凝土內部的孔隙缺陷,細化孔徑分布,消耗混凝土破壞時的部分斷裂破壞能。
    Abstract: Carbon nanofibers modified concrete was prepared with different dosage of carbon nanofibers. The compressive strength, flexural strength and splitting strength of the concrete were tested, and the modification mechanism was explored. The results show that the appropriate amount of carbon nanofibers can improve the mechanical properties of concrete. When the content of carbon nanofibers is 0.3%, the carbon nanofibers modified concrete has the best mechanical properties, among which the compressive strength, flexural strength and splitting strength are increased by 9.2%, 13.2% and 17.5% respectively compared with those of plain concrete. The SEM results show that carbon nanofibers can form a three-dimensional network structure inside concrete, thereby improving the micro-morphology of concrete, enhancing the toughness and integrity of concrete, filling the internal pore defects inside concrete, refining the pore diameter distribution, and consuming part of the fracture energy of concrete when it is destroyed.
    英文名 : Mechanical Properties and Micromechanism of Concrete Modified by Carbon Nanofibers
    刊期 : 2020年1期 ? No.285 ? P51-54
    關鍵詞 : 納米碳纖維;抗壓強度;抗折強度;劈裂強度;改性機理
    Key words : Carbon nanofiber; Compressive strength; Flexural strength; Splitting strength; Modification mechanism
    刊期 : 2020年1期 No.285 P51-54
    DOI : 10.19761/j.1000-4637.2020.01.051.04
    文章編號 :
    基金項目 : 黑龍江省交通運輸廳重點科技項目(JTZD-20181826)
    作者 : 王麗霖1,林 雪2,3
    單位 : 1.鄭州工程技術學院土木工程學院,450000;2.東北林業大學工程技術學院,哈爾濱 150040;3.黑龍江東方學院,哈爾濱 150066

    王麗霖1,林 雪2,3

    王麗霖,林雪.納米碳纖維改性混凝土的力學性能及微觀機理[J].混凝土與水泥制品,2020(1):51-54.

    WANG L L, LIN X.Mechanical Properties and Micromechanism of Concrete Modified by Carbon Nanofibers [J].China Concrete and Cement Products,2020(1):51-54.

    摘要
    參數
    結論
    參考文獻
    引用本文
    摘要:采用不同摻量的納米碳纖維制備混凝土,測試了納米碳纖維改性混凝土的抗壓強度、抗折強度和劈拉強度,并對其改性機理進行了探究。結果表明,適量的納米碳纖維能夠提高混凝土的力學性能。當摻量為0.3%時,納米碳纖維改性混凝土的力學性能最優,其抗壓強度、抗折強度和劈拉強度相較于素混凝土分別提高了9.2%、13.2%和17.5%。SEM測試結果表明,納米碳纖維能夠在混凝土內部形成立體網狀結構,改善混凝土的微觀形貌特征,增強混凝土的韌性和整體性,填充混凝土內部的孔隙缺陷,細化孔徑分布,消耗混凝土破壞時的部分斷裂破壞能。
     
    Abstract: Carbon nanofibers modified concrete was prepared with different dosage of carbon nanofibers. The compressive strength, flexural strength and splitting strength of the concrete were tested, and the modification mechanism was explored. The results show that the appropriate amount of carbon nanofibers can improve the mechanical properties of concrete. When the content of carbon nanofibers is 0.3%, the carbon nanofibers modified concrete has the best mechanical properties, among which the compressive strength, flexural strength and splitting strength are increased by 9.2%, 13.2% and 17.5% respectively compared with those of plain concrete. The SEM results show that carbon nanofibers can form a three-dimensional network structure inside concrete, thereby improving the micro-morphology of concrete, enhancing the toughness and integrity of concrete, filling the internal pore defects inside concrete, refining the pore diameter distribution, and consuming part of the fracture energy of concrete when it is destroyed. 
    掃二維碼用手機看
    未找到相應參數組,請于后臺屬性模板中添加
    (1)摻入適量的納米碳纖維能夠提高混凝土的力學性能,當摻量為0.3%時,材料的基本力學強度指標均最好,抗壓強度、抗折強度和劈拉強度相較于素混凝土分別提高了9.2%、13.2%和17.5%。
     
    (2)適量的納米碳纖維在混凝土中分散良好,可以形成立體網狀結構,減小水化產物的晶型。
     
    (3)改性混凝土中的納米碳纖維如同分子鏈一樣將膠凝顆粒連接在一起,增強了膠凝體的韌性和整體性。
     
    (4)納米碳纖維尺寸極小,在一定程度上可以填充混凝土中的孔隙缺陷。
     
    (5)納米碳纖維橋接在改性混凝土的微裂縫之間,在混凝土破壞時可以消耗掉部分斷裂破壞能。
    [1] 沈曾民.新型碳材料[M].北京:化學工業出版社,2003.
     
    [2] 苗生龍,周樣梅,陳奎宇,等.納米材料對混凝土性能影響研究進展[J].混凝土與水泥制品,2019(4):24-27.
     
    [3] 楊彬,丁斌.低溫環境下麥秸稈灰改性碳纖維混凝土性能試驗研究[J].混凝土與水泥制品,2017(5):49-52.
     
    [4] 趙稼祥.納米碳纖維及其應用[J].高科技纖維與應用,2003,20(2):48-50.
     
    [5] YAZDANBAKHSH A,GRASLEY Z,TYSON B,et al.Challenges and benefits of utilizing carbon nanofilaments in cementitious materials[J].Journal of Nanomaterials,2012,2012:1-8.
     
    [6] YAZDANBAKHSH A,GRASLEY Z,TYSON B,et al.Dispersion quantification of inclusions in composites[J]. Composites Part A Applied Science and Manufacturing,2011,42(1):75-83.
     
    [7] SANCHEZ F,INCE C.Microstructure and macroscopic properties of hybrid carbon nanofiber/silica fume cement composites[J].Composites Science and Technology,2009,69(7):1310-1318.
     
    [8] SANCHEZ F,SOBOLEV K.Nanotechnology in concrete – A review[J].Construction and Building Materials, 2010,24(11):2060-2071.
     
    [9] MAKAR J M,BEAUDOIN J J.Carbon nanotubes and their application in the construction industry[J].SPECIAL PUBLICATION- ROYAL SOCIETY OF CHEMISTRY, 2004.
     
    [10] MAKAR J M.Carbon nanotube/cement composite materials[J].Carbon Nanotubes Synthesis Properties and Applications,2009.
     
    [11] 高迪.新型建筑材料-納米級碳纖維混凝土性能研究[D].長沙:中南大學,2011.
     
    [12] 莊國方.納米碳纖維混凝土在劈裂及抗彎試驗中的壓敏特性研究[J].世界橋梁,2012,40(4):69-72.
     
    [13] 陳嫻.納米碳纖維高強混凝土抗腐蝕性能試驗研究[D].銀川:寧夏大學, 2014.
    王麗霖,林雪.納米碳纖維改性混凝土的力學性能及微觀機理[J].混凝土與水泥制品,2020(1):51-54.
     
    WANG L L, LIN X.Mechanical Properties and Micromechanism of Concrete Modified by Carbon Nanofibers [J].China Concrete and Cement Products,2020(1):51-54.

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