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首页> 外文会议>第二届自密实混凝土设计、性能及应用技术国际研讨会(2nd International Symposium on Design,Performance and Use of Self-Consolidating Concrete SCC'2009-China) >DISCUSSION ON MIXTURE RATIO DESIGN METHODS OF SELF-COMPACTING CONCRETE
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DISCUSSION ON MIXTURE RATIO DESIGN METHODS OF SELF-COMPACTING CONCRETE

机译：自填充混凝土的配合比设计方法探讨

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摘要

Now there are two common ratio design methods of self-compacting concrete (SCC). One is the fixed aggregate volume calculation method, and the other is the overall calculation method. To design the SCC with the same design index, big differences exist in the two methods. Then improved overall calculation method is proposed, but the mixture ratio got through it is almost the same as the fixed aggregate volume method. Furthermore, when to design concrete mixture ratio, with the designed strength grade of concrete improved (water to cement ratio reduced), paste volume keeps invariant and the loose piled volume of gravel increases (sand ratio decreases) by the overall calculation method; while the loose piled volume of gravel and the sand ratio keep invariant by the fixed aggregate volume calculation method (including improved overall calculation method), and the above don't match the concrete design theory. Thus, the problems on the design method and the value of design parameters are discussed, and then a more reasonable design concept called fixed gravel volume method is proposed.
机译：现在有两种常见的自密实混凝土（SCC）配比设计方法。一种是固定总量计算方法，另一种是总体计算方法。为了以相同的设计指标设计SCC，两种方法之间存在很大差异。然后提出了一种改进的总体计算方法，但是通过它得到的混合比与固定骨料体积法几乎相同。此外，在设计混凝土配合比时，通过整体计算方法，随着混凝土设计强度等级的提高（水灰比降低），浆料体积保持不变，砾石的疏松堆积体积增加（砂比降低）。固定的骨料体积计算方法（包括改进的整体计算方法）使砾石的疏松堆积体积和砂比保持不变，并且上述内容与具体的设计理论不符。因此，讨论了有关设计方法和设计参数值的问题，然后提出了一种更合理的设计概念，即固定砾石体积法。

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