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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

    合成纖維混凝土彎曲韌性研究
    合成纖維混凝土彎曲韌性研究
    • 王金輝1,葛 晨2,談永泉3,俞君寶2
    2020年第11期
    摘要
    引用本文
    摘 ? 要:通過聚丙烯腈(PAN)纖維混凝土和聚乙烯醇(PVA)纖維混凝土的三點彎曲切口梁試驗,研究了合成纖維摻量和彈性模量對混凝土彎曲韌性的影響,探究了纖維混凝土跨中撓度(δ)和裂縫張開口位移(CMOD)與纖維摻量的關系。結果表明:針對混凝土彎曲韌性而言,PAN纖維與PVA纖維的合適摻量范圍分別為1.5~1.8 kg/m3和1.3~1.5 kg/m3;δ與CMOD之間存在線性關系,可以用纖維摻量與CMOD預測δ。 Abstract: The influence of the content and elastic modulus of synthetic fiber on the flexural toughness of polyacrylonitrile (PAN) fiber concrete and polyvinyl alcohol (PVA) fiber concrete was studied by the three-point bending notch beam test. The relationship between midspan deflection (δ) and crack tensioning displacement (CMOD) and fiber content of fiber concrete was investigated. The results show that the optimal content range of PAN fiber and PVA fiber are 1.5~1.8 kg/m3 and 1.3~1.5 kg/m3, respectively. There is a linear relationship between δ and CMOD, the fiber content and CMOD can be used to predict δ.
    王金輝,葛晨,談永泉,等.合成纖維混凝土彎曲韌性研究[J].混凝土與水泥制品,2020(11):61-65. WANG J H,GE C,TAN Y Q,et al.Study on Flexural Toughness of Synthetic Fiber Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(11):61-65.
    混雜纖維混凝土抗Cl-滲透性能試驗研究
    混雜纖維混凝土抗Cl-滲透性能試驗研究
    • 張克純1,2,余江滔3,劉柯柯3
    2020年第11期
    摘要
    引用本文
    摘 ? 要:采用改進的干濕循環浸泡法,對比研究了PE纖維混凝土、鋼纖維混凝土和混雜纖維(PE纖維+鋼纖維)混凝土的抗Cl-滲透性能。結果表明,纖維混凝土的抗Cl-滲透性與纖維總表面積之間存在線性相關性,纖維總表面積越大,混凝土抗Cl-滲透性能越差;PE纖維和混雜纖維混凝土的抗Cl-滲透性能低于普通混凝土,鋼纖維混凝土的抗Cl-滲透性能高于普通混凝土;在混雜纖維總體積摻量不變的情況下,PE纖維的摻量越多,混雜纖維混凝土的Cl-滲透系數越大,抗Cl-滲透能力越差。 Abstract: The resistance of PE fiber concrete, steel fiber concrete and hybrid fiber(PE fiber + steel fiber) concrete to chloride ion penetration was studied by the improved dry-wet cyclic immersion test. The results show that there is a linear correlation between the resistance to chloride ion penetration of fiber concrete and the total surface area of fiber in concrete. The resistance to chloride ion penetration of PE fiber concrete and hybrid fiber concrete is lower than that of ordinary concrete, while the resistance to chloride ion penetration of steel fiber concrete is slightly higher than that of ordinary concrete. Under the condition that the total volume of hybrid fiber remains unchanged, the more the content of PE fiber, the greater the permeability coefficient of chloride ion and the worse the permeability of chloride ion.
    張克純,余江滔,劉柯柯.混雜纖維混凝土抗Cl-滲透性能試驗研究[J].混凝土與水泥制品,2020(11):57-60,65. ZHANG K C,YU J T,LIU K K.Experimental Study on Resistance to Chloride Ion Penetration of Hybrid Fiber Reinforced Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(11): 57-60,65.
    混雜纖維自密實混凝土凍融性能試驗研究
    混雜纖維自密實混凝土凍融性能試驗研究
    • 呂圓芳,楊永東
    2020年第十一期
    摘要
    引用本文
    摘 ? 要:研究了PP纖維、鍍銅鋼纖維和鋼-PP混雜纖維對自密實混凝土工作性及凍融前后力學性能的影響,并探討了凍融作用對纖維混雜增強效應系數的影響。結果表明:PP纖維對自密實混凝土工作性的影響大于鋼纖維;未摻纖維的空白組經300次凍融后,其質量損失率及相對動彈性模量損失分別達到4.23%、34.8%,表觀質量劣化嚴重;凍融作用對試件抗折強度影響最大,其次是動彈性模量和抗壓強度;纖維的摻入能有效提高混凝土的抗凍性能,但鋼纖維對表觀質量的改善作用小于PP纖維;混雜纖維抗凍融能力明顯高于單摻纖維組和空白組,纖維混雜增強效應隨凍融循環次數的增加而降低。 Abstract: The effects of polypropylene fiber(PP), ultrafine steel fiber and steel-PP hybrid fiber on the workability and mechanical properties of self compacting concrete(SCC) before and after freeze-thaw were studied, and the influence of freeze-thaw on fiber hybrid reinforcement effect coefficient was discussed. The results show that PP fiber has greater influence on the workability of SCC than steel fiber. After 300 freeze-thaw cycles, the mass loss rate and relative dynamic elastic modulus loss of the SCC without fiber reach 4.23% and 34.8%, respectively, and the apparent quality deteriorate seriously. The freeze-thaw effect has the greatest influence on the flexural strength of the specimen, followed by the dynamic elastic modulus and compressive strength. The addition of fiber can effectively improve the frost resistance of SCC, but the improvement effect of steel fiber on the apparent quality is less than that of PP fiber. The freeze-thaw resistance of the hybrid fiber specimens is significantly higher than that of the single-blend fiber group and the blank group, and the fiber hybrid reinforcement effect coefficient decreases with the increase of freeze-thaw cycles.
    呂圓芳,楊永東.混雜纖維自密實混凝土凍融性能試驗研究[J].混凝土與水泥制品,2020(11):52-56. LYU Y F,YANG Y D.Experimental Study on Freeze-thaw Performance of Hybrid Fiber Reinforced Self-compacting Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(11):52-56.
    關于我國纖維水泥制品發展現狀與技術創新的思考
    關于我國纖維水泥制品發展現狀與技術創新的思考
    • 馮立平1,章建陽2
    2020年第11期
    摘要
    引用本文
    摘 ? 要:闡述了現階段我國纖維水泥制品的種類、生產企業分布、技術裝備和應用情況,分析了我國纖維水泥制品行業目前存在的主要問題,如智能化水平不高、工業化和信息化融合程度較低、產品多樣性不足、安全生產及綠色環保理念落后、科研投入不足、產業鏈不健全等,并結合我國的政策要求和技術水平對纖維水泥制品行業的可持續發展進行了展望。 Abstract: The product types, production enterprise distribution, technical equipment and applications of Chinese fiber cement products industry at this stage are explained, and the main problems existing in Chinese fiber cement products industry are analyzed, such as low level of intelligence, low degree of integration of industrialization and informatization, lack of product diversity, backward concept of safety production and green environmental protection, insufficient investment in scientific research, and imperfect industrial chain, etc. Combined with Chinese policy requirements and technical level, the sustainable development of the fiber cement products industry is prospected.
    馮立平,章建陽.關于我國纖維水泥制品發展現狀與技術創新的思考[J].混凝土與水泥制品,2020(11):48-51. FENG L P,ZHANG J Y.Thoughts on the Development Status and Technological Innovation of Fiber Cement Products in China[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(11):48-51.
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