| 1. | Research on sand ratio of modified asphalt mixture
对改性沥青混合料中砂率的研究 |
| 2. | The study of the influence of sand percentage on the workability and strength of concrete
砂率对砼和易性及强度影响的试验研究 |
| 3. | Elastic moduli of scc were compared with those of normal concrete
研究中以不同含砂率之混凝土配比进行弹性模数试验，并与一般混凝土比较。 |
| 4. | If the strength and workability are approximate identical , concrete tends more easily to crack with the increasing sand rate
在强度和工作性相当的情况下，随着砂率的增大，混凝土出现裂缝的机会增加了。 |
| 5. | However , the elastic modulus of scc is not significantly affected by s / a ratio when total aggregate volume is kept constant
然而对弹性模数而言，当骨材总体积量一定时，改变混凝土含砂率对于弹性模数并没有太大的影响。 |
| 6. | The test results show that the drawing interval of 1 . 5 m is helpful for controlling dead - unconsolidated thin sandstone of coal seam roof and reduce sand ratio of drawn top - coal
试验结果表明，放煤步距采用三采一放有利于控制顶板极松散细砂岩，降低放出顶煤的含砂率。 |
| 7. | Under different sand ratio , the relationship between water cement ratio and 28 day compressive strength is researched and the coefficient of recycled concrete is induced
在不同砂率下,分析了再生混凝土28天龄期抗压强度与水灰比之间的关系,并回归分析得出了再生骨料系数。 |
| 8. | In order to study the effect of sand ratio ( s / a ratio , fine aggregate volume / total aggregate volume ) on the elastic modulus of self - compacting concrete ( scc ) , concretes with various s / a ratios were cast and tested
摘要本研究主要探讨混凝土含砂率（ s / a ，细骨材体积/总骨材体积）对流动化混凝土（ scc ）弹性模数的影响。 |
| 9. | For the mixing proportion design of marine engineering high - performance concrete , the strength and durability , as well as raw material performance , water - binder ratio , sand ratio , and water quantity shall be designed synthetically
海工高性能混凝土的配合比设计应充分考虑强度和耐久性，并对原材料的性能、水胶比、砂率、用水量等进行综合设计。 |
| 10. | The trends of plastic shrinkage cracking in concretes made with the same water or cement paste content per cubic meter are similar with the above case , but the critical w / c ratio is about 0 . 45 - 0 . 4 and 0 . 4 , respectively
2 ）在一定砂率范围内，较低和较高砂率对应的混凝土拌合物不易开裂，而中间某一临界砂率对应的混凝土拌合物开裂较大，这一临界砂率变化范围为36 - 43 % 。 |
