It shows that the modified overall calculation method is more scientific and rational and exact on mix ratio design of self-compacting concrete.
结果表明：改进的全计算法是一种科学、合理、准确的自密实混凝土配合比设计方法。
The mix design of strong concrete should follow the principles of low water-cement ratio, low sand ratio and high bone-glue ratio, thus the relatively satisfying effect can be achieved.
高强度混凝土的配合比设计应该遵循低水灰比、低砂率、高骨胶比的原则，这样才能达到比较理想的效果。
A mix proportion design method of pervious concrete is provided, of which total void ratio is the first design parameter and compressive strength is the second one.
根据透水混凝土的结构特征，对其配制参数和配合比计算方法进行了研究，提出了以总孔隙率为第一设计参数，抗压强度为第二参数的配合比设计方法。
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.
本文对密实混凝土配合比设计中的最优砂率、平均胶结浆体厚度、骨料密实度进行了一些探讨。
To research the mixing methods of high strength concrete and decide the mix ratio of core concrete of the specimens.
研究高强混凝土的配制方法，在此基础上确定本试验的配方。
The conclusion of this paper have very important vital instructive function about the mix ratio of pumped concrete of concrete filled steel tubular arch bridge.
本文得出的结论对钢管泵送混凝土配合比设计具有重要的指导作用。
The DESIGN REGULATIONS of MIX RATIO of ORDINARY concrete (JGJ55-2000) definitely point out that the con ditioned areas should study and establish the local strength formula of concrete.
《普通混凝土配合比设计规程》JGJ55—2000中明确指出有条件的地区应研究建立当地的混凝土强度关系式。
Furthermore, the mix ratio of concrete and the size of coarse aggregation have also effect on the results of test, but it seems that the effect of the fine coarse aggregation is not evident.
此外，混凝土的配合比与粗集料对测试结果也有重要影响，而细集料的影响似乎并不明显。
In this paper, the writer chose the adding means of PFA replacing sand, and put forward the mix ratio design of concrete by orthogonal analysis experiments.
通过正交试验设计，采用粉煤灰代砂法掺入再生混凝土，并进行配合比设计。
It is concluded that fly ash and expansion agent are the main factors influencing the surface quality of concrete and the surface quality can be improved essentially by adjusting the mix ratio.
得出结论：粉煤灰和膨胀剂是影响混凝土表观质量的主要因素，通过调整配合比可以从根本上改善混凝土的表观质量。
Mechanism, Mix ratio design, workability evaluation and test method of high-dropping shake-free self-compacting concrete were put forward.
提出对高抛免振捣自密实混凝土的工作机理、配合比设计、工作性评价方法及相应的试验方法。
The design technology-way of high-performance concrete mix-ratio projects used in second-level lining of Xiamen-xiang an undersea tunnel engineering is discussed.
阐述了厦门海底隧道衬砌高性能混凝土配合比方案的设计技术路线。
This paper researches the mix ratio of C55 concrete and construction technology of Xiaoshawan Bridge box girder, especially the influence of hill sand on concrete performances.
对小沙湾黄河大桥主桥箱梁C55混凝土配合比和施工工艺进行了研究，重点分析了山砂对混凝土性能的影响。
This paper researches the mix ratio of C55 concrete and construction technology of Xiaoshawan Bridge box girder, especially the influence of hill sand on concrete performances.
对小沙湾黄河大桥主桥箱梁C55混凝土配合比和施工工艺进行了研究，重点分析了山砂对混凝土性能的影响。
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