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    蘇州混凝土水泥制品研究院有限公司

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    水泥混凝土制品

    纖維種類對超高性能混凝土電桿性能的影響研究
    纖維種類對超高性能混凝土電桿性能的影響研究
    • 駱靜靜1,田 寅1,張立力1,陳晶晶1,王 濤2,蘇 強2
    2022年第1期
    摘要
    引用本文
    摘 ? 要:為研究聚丙烯纖維(PP纖維)、耐堿玻璃纖維(BX纖維)、鋼纖維(GX纖維)對超高性能混凝土(UHPC)電桿力學性能和耐久性能的影響,在前期摻量優選試驗基礎上,采用臥式離心工藝成型了規格為?覫190×12×M×BY的UHPC 電桿,并進行了力學性能和耐久性能試驗。結果表明:不同纖維種類對UHPC 折壓比的影響從高到底依次為:GX纖維、BX纖維、PP纖維;三種纖維均可提高UHPC 的耐久性,但效果不顯著;三種纖維對UHPC 電桿力學性能的影響由高到低依次為:GX纖維、BX纖維、PP纖維;三種纖維UHPC 電桿均滿足相關標準要求,考慮電桿外觀和經濟性,可使用PP纖維和BX纖維生產UHPC 電桿。 Abstract: In order to study the effects of polypropylene fiber, alkali resistant glass fiber and steel fiber on the mechanical properties and durability of ultra-high performance concrete poles, based on the preliminary content optimization test, the ?覫190×12×M×BY ultra-high performance concrete poles were produced by horizontal centrifugal process, and the mechanical properties and durability tests were carried out. The results show that the effects of different fiber types on the flexural compression ratio of ultra-high performance concrete from high to low are steel fiber, alkali resistant glass fiber and polypropylene fiber. Three kinds of fibers can improve the durability of ultra-high performance concrete, but the effect is not significant. The effects of three fibers on the mechanical properties of UHPC poles ?from high to low are steel fiber, alkali resistant glass fiber and polypropylene fiber. Three kinds of fibers all can meet the requirements of relevant standards. Considering the appearance and economy of poles, polypropylene fiber, alkali resistant glass fiber can be recommended to used to produce UHPC poles.
    駱靜靜,田寅,張立力,等.纖維種類對超高性能混凝土電桿性能的影響研究[J].混凝土與水泥制品,2022(1):38-40. LUO J J,TIAN Y,ZHANG L L,et al.Study on the Influence of Fiber Types on the Performance of Ultra-high Performance Concrete Poles[J].China Concrete and Cement Products,2022(1):38-40.
    C105管樁混凝土設計參數取值的探討
    C105管樁混凝土設計參數取值的探討
    • 何友林,茹軍輝,李 龍
    2022年第1期
    摘要
    引用本文
    通過試驗得出了C105混凝土100 mm×100 mm×100 mm立方體非標準試件抗壓強度換算系數以及C105混凝土的標準方差和強度變異系數。采用理論計算,得到了棱柱體抗壓強度與立方體抗壓強度的比值αc1,并與試驗實測平均值進行了比較,驗證了理論計算方法的可行性。此外,通過對比分析,探討了直接外延法和引用公式法兩種C105混凝土設計參數計算方法的正確性,研究結果可為C105管樁混凝土的設計和應用提供參考。 Abstract: The conversion coefficient of C105 concrete compressive strength was obtained for the size of the 100 mm×100 mm×100 mm cubic specimen by testing. And the standard deviation and strength variable coefficient were obtained by statistical analysis. The ratio αc1 of prismatic compressive strength to cubic compressive strength was obtained by theoretical calculation, and compared with the measured average value, which verifies the feasibility of the theoretical calculation method. In addition, through the comparative analysis, the correctness of the direct epitaxy method and quoted formula method of C105 concrete design parameters was systematically discussed, and the research results can provide a reference for the design and application of C105 pile concrete.
    何友林,茹軍輝,李龍.C105管樁混凝土設計參數取值的探討[J].混凝土與水泥制品,2022(1):41-43,47. HE Y L,RU J H,LI L.Discussion on Design Parameters Value Selection of C105 Piles Concrete[J].China Concrete and Cement Products,2022(1):41-43,47.
    預制管片混凝土裂縫控制技術研究
    預制管片混凝土裂縫控制技術研究
    • 溫泉武
    2022年第1期
    摘要
    引用本文
    摘 要:為抑止混凝土收縮,配制出滿足工作性、力學性能、耐久性要求,又經濟合理的預制管片用混凝土,依據SL/T 352—2020《水工混凝土試驗規程》,通過降低混凝土漿體總量等方法,試驗研究了不同水膠比和粉煤灰摻量對管片用混凝土強度的影響。在配合比優選基礎上,提出了管片生產澆筑和養護過程中的工藝控制措施,可為管片的生產提供參考。 Abstract: In order to inhibit concrete shrinkage, and prepare precast segment concrete that meets the requirements of workability, mechanical properties and durability, according to the SL/T 352—2020 Test Code for Hydraulic Concrete, the effects of different water binder ratio and fly ash content on concrete strength are studied by reducing the total amount of concrete slurry. On the basis of mix proportion optimization, the precautions in the process of segment production, pouring and maintenance are put forward, which can provide technical solutions for the production site.
    溫泉武.預制管片混凝土裂縫控制技術研究[J].混凝土與水泥制品,2022(1):44-47. WEN Q W.Research Crack Control Technology of Precast Segment Concrete[J].China Concrete and Cement Products,2022(1):44-47.
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