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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

    粉煤灰與稻草纖維復摻對混凝土力學性能的 影響
    粉煤灰與稻草纖維復摻對混凝土力學性能的 影響
    • 劉 濤,趙明皓,聶國豪,韓龍宇,林 鋒,巫緒濤
    2021年第11期
    摘要
    引用本文
    摘 ? 要:研究了絲狀、桿狀稻草纖維分別與粉煤灰復摻對混凝土力學性能的影響。結果表明:隨著稻草纖維和粉煤灰摻量的增加,混凝土的抗壓強度、劈裂抗拉強度和抗折強度總體呈下降趨勢,但稻草纖維能夠有效改善混凝土的脆性破壞形態;絲狀稻草纖維對混凝土性能的不利影響小于桿狀稻草纖維;當絲狀稻草纖維摻量為0.3%、粉煤灰摻量為20%時,混凝土的抗壓強度較高;當絲狀稻草纖維摻量為0.3%、粉煤灰摻量為10%時,混凝土的劈裂抗拉強度較高;當絲狀稻草纖維摻量為0.3%、粉煤灰摻量為20%時,混凝土的抗折強度較高。 Abstract: The effects of filamentary straw fiber and rod-shaped straw fiber and fly ash on mechanical properties of concrete were studied. The results show that the compressive strength, splitting tensile strength and flexural strength of concrete generally decrease with the increase of straw fiber content and fly ash content, but straw fiber can effectively improve the brittle damage pattern of concrete. The adverse effect of filamentous straw fiber on the performance of concrete is less than that of rod-shaped straw fiber. The compressive strength of the concrete is higher when the filamentary straw fiber content is 0.3% and the fly ash content is 20%. The splitting tensile strength of the concrete is higher when the filamentary straw fiber content is 0.3% and the fly ash content is 10%. The flexural strength of the concrete is higher when the filamentary straw fiber content is 0.3% and the fly ash content is 20%.
    劉濤,趙明皓,聶國豪,等.粉煤灰與稻草纖維復摻對混凝土力學性能的影響[J].混凝土與水泥制品,2021(11):64-67,72. LIU T,ZHAO M H,NIE G H.Study on the Mechanical Properties of Fly Ash and Straw Fiber Composite Concrete[J].China Concrete and Cement Products,2021(11):64-67,72.
    CFRP編織管約束混凝土短柱軸壓性能試驗研究
    CFRP編織管約束混凝土短柱軸壓性能試驗研究
    • 張浩龍,王文昊,徐 迎,王 鵬,孫大威,吳建欽
    2021年第11期
    摘要
    引用本文
    摘 ? 要:通過21根碳纖維增強復合材料(CFRP)編織管約束混凝土短柱的準靜態軸壓試驗,研究了CFRP層數、水灰比、試件長徑比對混凝土短柱抗壓強度和變形性能的影響。結果表明:CFRP編織管約束試件的承載力相比素混凝土試件至少提高了10%;水灰比在一定范圍內變化時,對試驗結果的影響不大;試件長徑比越小,CFRP對最大荷載的提升作用越明顯。 Abstract: Through the quasi-static axial compression tests of concrete short columns confined by 21 carbon fiber reinforced composite material(CFRP) braided tubes, the effects of the number of CFRP layer, water-cement ratio, and length-diameter ratio of specimen on the compressive strength and deformation characteristics of concrete short columns were studied. The results show that the bearing capacity of the CFRP tube confined column is at least 10% higher than that of the plain concrete column. The water-cement ratio has little effect on the test results within a certain range. The smaller the length-diameter ratio of the column, the more obvious the increase in the maximum load by CFRP.
    張浩龍,王文昊,徐迎,等.CFRP編織管約束混凝土短柱軸壓性能試驗研究[J].混凝土與水泥制品,2021(11):59-63. ZHANG H L,WANG W H,XU Y,et al.Experimental Study on the Axial Compression Performance of Concrete Short Columns Confined by CFRP Braided Tubes[J].China Concrete and Cement Products,2021(11):59-63.
    纖維分布對聚合物水泥混凝土力學性能的影響研究
    纖維分布對聚合物水泥混凝土力學性能的影響研究
    • 趙繼忠1,史玉良2,李鑫磊1,徐 雨1
    2021年第11期
    摘要
    引用本文
    摘 ?要:通過三組不同纖維體積摻量(0.1%、0.2%、0.3%)的玄武巖纖維增強聚合物混凝土(BFRPC)抗壓強度試驗,研究了纖維分布對BFRPC抗壓強度的影響。利用計算機掃描技術和數字圖像處理技術(DIP),從微觀上分析了玄武巖纖維(BF)對聚合物混凝土性能的增強機理。結果表明:BF的最佳體積摻量為0.2%,此時BF分布均勻,BFRPC的抗壓強度達到了50.10 MPa,纖維接觸率達到了61.0%;當BF體積摻量增至0.3%時,BFRPC的抗壓強度為46.52 MPa,纖維接觸率為82.9%,雖然抗壓強度有所下降,但仍高于普通混凝土的抗壓強度,且纖維接觸率增大,說明此時BF的增韌阻裂效果大于BF結團對BFRPC力學性能的影響。 Abstract: Through three groups of compressive strength tests of basalt fiber reinforced polymer concrete (BFRPC) with different fiber volume content(0.1%, 0.2%, 0.3%), the effect of fiber distribution on compressive strength of BFRPC was studied. Using computer scanning technology and digital image processing technology(DIP), the strengthening mechanism of basalt fiber(BF) on the properties of polymer concrete was analyzed microscopically. The results show that the optimum volume content of BF is 0.2%, and the BF distribution is uniform at this time, the compressive strength of BFRPC reaches 50.10 MPa and the fiber contact rate reaches 61.0%. When the volume content of BF increases to 0.3%, the compressive strength of BFRPC is 46.52 MPa and the fiber contact rate is 82.9%. Although the compressive strength decreases, it is still higher than that of ordinary concrete, and the fiber contact rate increases, which indicates that the toughening and crack resistance effect of BF is greater than that of BF agglomeration on the mechanical properties of BFRPC.
    趙繼忠,史玉良,李鑫磊,等.纖維分布對聚合物水泥混凝土力學性能的影響研究[J].混凝土與水泥制品,2021(11):55-58,72. ZHAO J Z,SHI Y L,LI X L,et al.Study on the Influence of Fiber Distribution on Mechanical Properties of Polymer Cement Concrete[J].China Concrete and Cement Products,2021(11):55-58,72.
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