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    蘇州混凝土水泥制品研究院有限公司

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    發布時間:2020-01-06 00:00:00
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    纖維水泥及制品

    纖維對含粗骨料超高性能混凝土高溫性能的影響
    纖維對含粗骨料超高性能混凝土高溫性能的影響
    • 錢云峰1,楊鼎宜1,2,夏旸昊1,陸仕祥3,王彤章1
    2021年第2期
    摘要
    引用本文
    摘 ? 要:為了探究改善超高性能混凝土(UHPC)高溫性能的措施,從力學性能、質量損失、超聲檢測等方面研究了纖維(不摻纖維、單摻鋼纖維、混摻鋼纖維與合成纖維)對UHPC高溫性能的影響。結果表明:當纖維摻量增加時,UHPC的工作性與抗壓強度均隨之下降,抗折強度則先升后降;隨著目標溫度的升高,UHPC的殘余抗壓強度先升后降,損傷逐步加重;纖維的加入可以延緩裂縫的發展,混摻鋼纖維與合成纖維可以有效改善UHPC高溫爆裂行為。 Abstract: In order to explore the measures to improve the high temperature performance of ultra-high performance concrete(UHPC), the influence of fiber(non-fiber, single steel fiber, mixed steel fiber and synthetic fiber) on the high temperature performance of UHPC was studied from the aspects of mechanical properties, mass loss and ultrasonic testing. The results show that when the fiber content increases, the workability and compressive strength of UHPC decrease, while the flexural strength increases first and then decreases. With the increase of the target temperature, the residual compressive strength increases first and then decreases. The addition of fiber can delay the development of cracks, and the mixing of steel fiber and synthetic fiber can effectively improve the high temperature burst behavior of UHPC.
    錢云峰,楊鼎宜,夏旸昊,等.纖維對含粗骨料超高性能混凝土高溫性能的影響[J].混凝土與水泥制品,2021(2):51-56. QIAN Y F,YANG D Y,XIA Y H,et al.Influence of Fiber on High Temperature Performance of Ultra-high Performance Concrete With Coarse Aggregate[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(2):51-56.
    聚丙烯-玄武巖混雜纖維對陶?;炷亮W性能的影響
    聚丙烯-玄武巖混雜纖維對陶?;炷亮W性能的影響
    • 朱紅兵1,施旭剛1,李秀2
    2021年第2期
    摘要
    引用本文
    摘 ? 要:對摻加聚丙烯-玄武巖混雜纖維的陶?;炷吝M行了抗壓強度、抗折強度、劈裂抗拉強度試驗,得到了混雜纖維對陶?;炷亮W性能的影響規律。結果表明:混雜纖維摻量為0.2%時,陶?;炷恋目箟簭姸?、劈裂抗拉強度、抗折強度提升幅度最大,分別較基準組提高了11.21%、30.73%、15.26%,但摻量過大時陶?;炷恋牧W性能會下降,甚至出現負效應;聚丙烯纖維與玄武巖纖維的混雜比為2∶1時,其對陶?;炷恋脑鰪娦Ч^好;混雜纖維能增強陶?;炷恋捻g性,對抗折強度和抗拉強度提升效果明顯,對抗壓強度提升效果較小。 Abstract: The compressive strength, flexural strength and splitting tensile strength tests of ceramsite concrete with polypropylene-basalt hybrid fiber were carried out, and the influence rules of hybrid fiber on the mechanical properties of ceramsite concrete were obtained. The results show that when the hybrid fiber content is 0.2%, the compressive strength, splitting tensile strength and flexural strength of ceramsite concrete have the largest increase, which are increased by 11.21%, 30.73% and 15.26% respectively compared with blank group, but when the hybrid fiber content is too high, the mechanical properties of ceramsite concrete will be decreased or even have negative effect. When the mixing ratio of polypropylene fiber and basalt fiber is 2∶1, the reinforcement effect of ceramsite concrete is great. The toughness of ceramsite concrete can be enhanced by adding hybrid fiber, and the tensile strength and flexural strength are obviously improved, but the effect of improving compressive strength is small.
    朱紅兵,施旭剛,李秀.聚丙烯-玄武巖混雜纖維對陶?;炷亮W性能的影響[J].混凝土與水泥制品,2021(2):57-60. ZHU H B,SHI X G,LI X.Influence of Polypropylene-basalt Hybrid Fiber on Mechanical Properties of Ceramsite Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(2)::57-60.
    基于振動攪拌技術的碳纖維接地導電混凝土制備及性能研究
    基于振動攪拌技術的碳纖維接地導電混凝土制備及性能研究
    • 程育林1,周 遷1,劉宇彬1,李興澤1,馮新軍2
    2021年第2期
    摘要
    引用本文
    摘 ? 要:采用振動攪拌技術,選取碳纖維為導電相制備用于桿塔基礎接地的導電混凝土,并對碳纖維導電混凝土的振動攪拌工藝參數、配合比和接地性能進行了試驗研究。結果表明:采用振動攪拌技術制備碳纖維導電混凝土的最優工藝參數組合為:干拌時間10 s、濕拌時間70 s、加碳纖維攪拌時間60 s;最優配合比為:碳纖維摻量0.3%、水灰比0.46、單位用水量200 kg、砂率36%;此工藝參數和配合比下,導電混凝土的28 d抗壓強度為46.3 MPa,抗折強度為5.7 MPa,28 d電阻率為2.09 Ω·m,導電性能優良,滿足輸電線路桿塔基礎接地的性能要求。 Abstract: Based on the vibration mixing technology, carbon fiber was selected as the conductive phase to prepare the conductive concrete for tower foundation grounding. The vibration mixing process parameters, mix proportion and grounding performance of carbon fiber conductive concrete were studied. The results show that the best combination of process parameters for the preparation of carbon fiber conductive concrete are: dry mixing time of 10 s, wet mixing time of 70 s and carbon fiber mixing time of 60 s. The best mix proportion is: carbon fiber content of 0.3%, water cement ratio of 0.46, unit water ues of 200 kg, sand ratio of 36%. Under this process parameter and mix proportion, the 28 d compressive strength and bending strength of the conductive concrete are 46.3 MPa and 5.7 MPa respectively, and the 28 d resistivity of the conductive concrete is 2.09 Ω·m, which has excellent electrical conductivity and meets the requirements of the grounding performance of the transmission line tower foundation.?
    程育林,周遷,劉宇彬,等.基于振動攪拌技術的碳纖維接地導電混凝土制備及性能研究[J].混凝土與水泥制品,2021(2):61-64,100. CHENG Y L,ZHOU Q,LIU Y B,et al.Study on Preparation and Performance of Carbon Fiber Grounded Conductive Concrete Based on Vibration Mixing Technology[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(2):61-64,100.
    粉煤灰纖維架構彈性保溫隔熱材料的研究
    粉煤灰纖維架構彈性保溫隔熱材料的研究
    • 劉海順1,羅志明1,程亞軍1,龔小平2,王建東3
    2021年第2期
    摘要
    引用本文
    摘 ? 要:選用了粉煤灰纖維、超細粉煤灰纖維作為空間架構材料,采用陰離子表面活性劑發泡,以純熟料水泥凝膠硬化定型,輔以真空抽吸破泡,通過充分干燥及表面防水處理工藝制得了粉煤灰纖維架構彈性保溫隔熱材料。結果表明:當超細粉煤灰纖維摻量為5%~15%、粉煤灰纖維與純熟料水泥質量比為0.25、純熟料水泥摻量為5%~20%時,材料的導熱系數普遍在0.04~0.06 W/(m·K)之間,表觀密度集中在80~150 kg/m3,抗壓強度普遍低于0.20 MPa,所制得的保溫隔熱材料具有一定的彈性,永久變形量在0.050~0.090 mm之間。 Abstract: Fly ash fiber and ultra-fine fly ash fiber were selected as space structure materials. The anionic surfactant was used for foaming, the pure clinker cement gel was used to harden the shape, and the vacuum suction was used to break the foam, and the fly ash fiber structure elastic thermal insulation material was prepared through full drying and surface waterproof treatment. The results show that when the content of ultra-fine fly ash fiber is 5%~15%, the mass ratio of fly ash fiber to pure clinker cement is 0.25, and the content of pure clinker cement is 5%~20%, the thermal conductivity of the material is universal between 0.04~0.06 W/(m·K), the apparent density is concentrated in 80~150 kg/m3, and the compressive strength is generally lower than 0.20 MPa. The prepared thermal insulation material has certain elasticity and the permanent deformation is between 0.050~0.090 mm. ?
    劉海順,羅志明,程亞軍,等.粉煤灰纖維架構彈性保溫隔熱材料的研究[J].混凝土與水泥制品,2021(2):65-68. LIU H S,LUO Z M,CHENG Y J,et al.Study on Elastic Thermal Insulation Materials with Fly Ash Fiber Structure[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(2):65-68.
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