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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

    早強降黏型復合摻合料對盾構管片混凝土性能的影響
    早強降黏型復合摻合料對盾構管片混凝土性能的影響
    • 張國良1,李 晨1,張 煜1,高 超2,3,周永祥2,3,范鶴飛4
    2020年1期 ? No.285 ? P29-32
    摘要
    引用本文
    摘要:研究了早強降黏型復合摻合料對盾構管片混凝土的工作性、養護時間、脫模強度、力學性能和長期耐久性能的影響。結果表明,摻加早強降黏型復合摻合料能夠在一定程度上降低混凝土拌合物的黏度,提高混凝土的脫模強度及早期強度,從而改善盾構管片混凝土的外觀,提高盾構管片模板周轉率,對混凝土的耐久性能也有一定的提升。
    Abstract: The workability, curing age, the strength for moulding, mechanical properties and long-term durability of the concrete for tunnel segment after the improvement of composite admixture with early strength and viscosity-reducing function were investigated. The results show that the composite admixture can reduce the viscosity of fresh concrete to some extent as well as the strength for moulding and early strength are both enhanced at the same time, thereby improving the exterior quality and durability of concrete of the shield tunnel segment and the turnover rate of template.
    張國良,李晨,張煜,等.早強降黏型復合摻合料對盾構管片混凝土性能的影響[J].混凝土與水泥制品,2020(1):29-32.
    ZHANG G L,LI C,ZHANG Y,et al.Effect of Composite Admixture with Early Strength and Viscosity-Reducing Function on the Concrete of Shield Tunnel Segment[J].China Concrete and Cement Products,2020(1):29-32.
    環形混凝土電桿撓度測量不確定度分析
    環形混凝土電桿撓度測量不確定度分析
    • 錢錫穎,金坤鵬,陸琛杰,朱昉直
    2020年1期 ? No.285 ? P233-35+40
    摘要
    引用本文
    摘要:研究了不確定度在電桿力學試驗中的應用,分別對標距測量、支點位移、荷載傳感器誤差進行了不確定度評定。通過設計建立數學模型,初步分析了各不確定度的來源,并計算了各影響因素的靈敏度系數,最后根據不確定度傳播率合成,給出了不確定度分析結果。結果表明,在所有對電桿撓度測量的影響因素中,由于標距L、L2測量的靈敏度系數較小,其對撓度的影響可忽略。
    Abstract: The application of measurement uncertainty in the mechanical test of circular concrete poles was studied, and the uncertainty of gauge length measurement, fulcrum displacement and load sensor error were evaluated. Through the design of the mathematical model, the source of each uncertainty was analyzed, and the sensitivity coefficients of each influencing factor were calculated. Finally, the uncertainty analysis results were given according to the uncertainty propagation rate synthesis. The analysis shows that in all the factors affecting the deflection measurement of the circular concrete pole, the influence of the gauge length is small, and its influence on the deflection can be negligible.
    錢錫穎,金坤鵬,陸琛杰,等.環形混凝土電桿撓度測量不確定度分析[J].混凝土與水泥制品,2020(1):33-35+40.
    QIAN X Y,JIN K P,LU C J,et al.Uncertainty Analysis of Deflection Measurement of Circular Concrete Pole[J].China Concrete and Cement Products,2020(1):33-35+40.
    方鋼管赤泥混凝土黏結滑移性能試驗研究
    方鋼管赤泥混凝土黏結滑移性能試驗研究
    • 武 斌1,2,譚卓英2,尹 晶1,趙 爽3,齊 昆4
    2020年1期 ? No.285 ? P36-40
    摘要
    引用本文
    摘要:制作了15個方鋼管赤泥混凝土短柱試件進行推出試驗,獲得了方鋼管赤泥混凝土的荷載-滑移曲線,研究了赤泥替代率、混凝土強度、長徑比(埋置長度)、寬厚比對方鋼管赤泥混凝土黏結滑移性能的影響。研究結果表明,方鋼管赤泥混凝土荷載-滑移曲線經歷了5個階段,即無滑移段、上升段、下降段、二次上升段、二次下降段。黏結極限荷載隨赤泥替代率的提高先增加后降低,赤泥替代率為5%時,黏結極限荷載達到最大;赤泥替代率為20%時,黏結極限荷載與標準鋼管混凝土相當。黏結極限荷載隨混凝土強度及長徑比的增加而增加;隨寬厚比的增加而減小。
    Abstract: Fifteen red mud concrete filled square steel tubes short column specimens were designed for the push-out test, and the load-slip curves of red mud concrete filled square steel tubes were obtained, and the effects of the replacement rate of red mud mass, concrete strength, length diameter ratio(embedment length), width to thickness ratio on the bond slip behavior of the steel stubs were studied. The results show that the load slip curves of red mud concrete filled square steel tubes can be classified into five stages: no slipping, ascending, descending, reascending and redescending. The bond ultimate load increases first and then decreases with the increase of red mud substitution rate. When the substitution rate of red mud is 5%, the bond ultimate load reaches the maximum. When the substitution rate of red mud is 20%, the bond ultimate load is equivalent to that of normal concrete filled steel tube. The bond ultimate load increases with the increase of the concrete strength and the length-diameter ratio, and decreases with the increase of the width-thickness ratio.
    張國良,李晨,張煜,等.早強降黏型復合摻合料對盾構管片混凝土性能的影響[J].混凝土與水泥制品,2020(1):29-32.
    ZHANG G L,LI C,ZHANG Y,et al.Effect of Composite Admixture with Early Strength and Viscosity-Reducing Function on the Concrete of Shield Tunnel Segment[J].China Concrete and Cement Products,2020(1):29-32.
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