| 封培然,张 超.粗骨料最佳级配的试验研究[J].水泥工程,2020,33(3):8-12 |
| 粗骨料最佳级配的试验研究 |
| Experimental study on the best gradation of coarse aggregate |
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| DOI： |
| 中文关键词: 粗骨料,级配,fuller曲线,拟合 |
| 英文关键词: coarse aggregate, grading, Fuller curve, fitting |
| 基金项目: |
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| 中文摘要: |
| 砂石骨料作为普通混凝土的支撑架构，承担外力荷载与内部应力，是混凝土体积稳定性的主要承担者，通过Fuller曲线确定骨料最大堆积密度，并通过试验进行了验证，结果表明三个单级粒径组成的级配比二个单粒径组成的骨料级配拥有更小的孔隙率，进一步增加单粒径数目，孔隙率依然下降，但是下降幅度很小；Fuller曲线计算值与试验结果之间存在较大偏差，而分形特征方程的分形维数估计在0～1.45之间，使用一元高次方程可以得到很好的结果。 |
| 英文摘要: |
| As an ordinary concrete support structure and to undertake external load and internal stress, it is the main undertake on volume stability of concrete by sand and gravel aggregate . Through fuller curve determined the biggest bulk density of aggregate, and it is verified by the experimental, results showed that it has less porosity aggregate gradation by the level of three single stage size than the two single particle size of, further increase the number of single particle size, porosity is still down, but the decline is very small; There is a large deviation between the calculated value of fuller curve and the test results, and the fractal dimension estimation of the fractal characteristic equation is between 0 and 1.45, so the higher order equation with one variable can get good results. |
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