• 钢筋部200mm范围不应有锈蚀油污混凝土污染,污染钢筋应清理干净后才能进行电渣压力焊焊接

    Within 200mm area of re-bar end surface, it should be free of rust, oil dirt, concrete slurry etc. The contaminated re-bar should be cleaned for electroslag welding.

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  • 螺旋钻头底部阀门防止钻进过程进入到空心混凝土中,钻杆提出同时混凝土注入时钻杆底部的阀门打开

    The valve at the bottom of auger can prevent drilling bits entering hollow pipe during operation. When drilling pipe is taken out and concrete grout is injected, the valve will be opened.

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  • 混凝土架构设计理论实质通过架单位用水量以及砂灰比偏离三个参数推求单位水泥用量过程。

    The essence of concrete framework theory is to deduce the cement dosage of unit volume concrete from frame-mortar ratio, unit water dosage and deviated function of cement-sand ratio.

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  • 硬化混凝土地坪中,节约水泥用量,施工增加强度耐磨耐久性作用。

    For concrete ground, it can save the cement consumption, and no purifying is needed, which increases the strength and wear resistance.

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  • 石粉是否作为材料对于碾压混凝土气泡参数测定直接影响

    The testing of air void parameters could been influenced directly by regarding stone powder as cementitious materials.

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  • 混凝土施工到达一定时间后强度表现出粗糙松散凝结不好强度不够主要原因

    The concrete construction reach a certain time, low intensity, and show slurry rough, loose, condensation bad or insufficient strength. Main reasons are.

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  • 混凝土结构表面状况直接影响到混凝土结构碳化性能。

    The paste state of surface of concrete structure affects the carbonation resistance of concrete directly.

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  • 通过大量实验阐述了RPC -活性粉末混凝土配制过程中,各种组分体流动性硬化体强度影响机理进行讨论

    Through a great number of experiments, the influences of the components to paste flow and concrete strength during RPC compounding were illustrated, at the same time, we discussed the mechanism.

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  • 介绍钻孔第四纪粘土地层口径施工中的应用情况,混凝土斜桩成桩施工提供了一定的方法经验

    The drilling pressure slurry used in construction of big gauge slant piles is introduced. It provides methods and experience for slant pile of concrete without sand.

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  • 封层普通沥青混凝土相比具有:(1)超薄结构厚度

    In comparison with ordinary bituminous concrete to seal the surface with dilute bitumen has the following features: (1) extra-thin thickness of structure.

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  • 其次水泥接缝混凝土,接缝面铺筑任何接缝面材料试块,劈裂抗拉强度最小

    Expansive cement paste and joint concrete are next. And the bond splitting tensile strength of joint surface without bond material is least.

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  • “净”搅拌工艺可以大大改善界面过渡结构从而提高混凝土强度

    And the Stone Enveloped with Cement can meliorate distinctly the structure of the transition zone of interface, thus the strength of concrete is improved.

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  • 沥青混凝土路面损害造成龟裂、网坑洞等早期破坏现象,公路路面普遍出现。

    Frost boiling, alligator crack, net-shaped crack and pits are commonly found in highway pavement, they are resulted from the moisture damage in the asphalt concrete pavements.

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  • 振捣延续时间使混凝土表面呈现不再沉落为止,约20 ~30s

    For every vibrating point, the vibration shall go on till free mortar appears on the concrete surface and not sinks any more, normally 20 ~ 30s.

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  • 预应力管道真空辅助压工艺提高后张预应力混凝土结构安全度耐久性有效措施

    The prestressing duct vacuum grouting workmanship is an effective measure for improving the safety and durability of the post-tensioning concrete structures.

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  • 混凝土体积骨料体积比。

    The ratio between mortar and coarse aggregate in concrete refers to the volume ratio.

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  • 文章通过工程实践详细介绍钢筋混凝土灌注桩提高承载力原理

    After construction practice, the author has introduced in detail the principle of raising the bearing power by pressing after grouting with armored concrete.

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  • 并且由于具有FDN缓释效果能有效延长水泥流动度,减少混凝土坍落度的经时损失

    Besides, it effectively maintains fluidity of cement paste and decreases concrete slump loss which is attributed to absorption effect of zeolite to FDN.

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  • 本文密实混凝土配合比设计中的优砂率、平均胶结厚度骨料密实度进行一些探讨

    This paper proceeds some discussion about the optimized sand-ratio, ave rage paste thickness and aggregate packing degree in the packing concrete mix proportion design.

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  • 冻融循环试验表明由于混凝土这三水泥基材料结构不同,使得破坏时的外观和断面形状各不相同。

    Freezing and thawing test shows that the figuration and cross-section of cement-based materials (paste, mortar and concrete) are different after they damage because of their different pore structures.

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  • 通过大量实验阐述了RPC-活性粉末混凝土配制过程中 ,各种组分体流动性硬化体强度影响机理进行讨论

    Through a great number of experiments, the influences of the components to paste flow and concrete strength during RPC compounding were illustrated , at the same time, we discussed the mechanism.

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  • 结果表明,利用合成产品水水泥流动保持性能可以定性判定合成产品在保持混凝土坍落度方面能力

    The results show that the ability of the synthesis production to control the slump loss can be qualitatively determined through the ability to keep the fluidity of cement paste without bleeding.

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  • 溢流坝面的薄层钢筋混凝土砌块石爆破拆除直接坝体进行

    Blasting demolition of thin RC weir surface and mortared rubble is directly conducted on spillway dam.

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  • 施工实践证明,底孔混凝土强度高于普通混凝土强度。

    The construction practice proves that the grouted concrete strength higher th an the normal concrete strength.

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  • 聚合物两种方式掺合于混凝土:一种是添加于未硬结混凝土中,另一种是浸渍于己硬结混凝土中的孔洞结构中。

    Polymers may be incorporated in concrete in two ways: either added to the unhardened concrete slurry or impregnated into the void structure of the hardened concrete.

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  • 它们水泥新拌混凝土工作性影响有所不同,此外掺加减水剂的硬化产物力学性能微观结构也具有很大差别

    However, there are large distinctions between the influences of the two types to the workability of cement paste and fresh concrete, the mechanical properties and microstructure of hardened concrete.

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  • 理论上结构进行受力分析,得出拱上结构采用预制混凝土施工有一定局限性结论,以此依据指导施工

    This paper analyses force of arch structure in terms of theory, points out constructional Limitations of arch structure applying prefabricated component. It provides basis for guiding construction.

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  • 理论上结构进行受力分析,得出拱上结构采用预制混凝土施工有一定局限性结论,以此依据指导施工

    This paper analyses force of arch structure in terms of theory, points out constructional Limitations of arch structure applying prefabricated component. It provides basis for guiding construction.

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