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Pore Structure Morphology and Strength of Self-Compacting Foam Material Backfilled Behind the Underground Pipe-Wall of Yellow River

机译:孔隙结构形态自压制泡沫材料的强度回填后面的黄河地下管墙后面

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摘要

The backfill material for the underground pipe wall of Yellow River embankment was developed to avoid the high settlement and environmental damage caused by high filling and excavation. The interrelation between microstructure and compressive strength of the self-compacting foam backfill material with different water–binder ratios and density grades was investigated. The results indicated that the average pores size of the foam backfill material increased with increasing the water–binder ratio. Moreover, the compressive strength of the foam backfill material first increased and then decreased with continuously increasing the water–binder ratio. Based on the observation and the analysis of the computed tomography (CT) image, it can be found that the pore size of the foam backfill material decreased with the increment of the density grade. The overall findings demonstrated that the pore size and volume played an important role in affecting the performance of the foam backfill material used for the construction of the underground pipe wall of Yellow River embankment.
机译:开发了黄河路堤地下管壁的回填材料,以避免高灌装和挖掘造成的高沉降和环境损害。研究了具有不同水 - 粘合剂比和密度等级的自压力泡沫回填材料的微观结构和抗压强度之间的相互关系。结果表明,随着水粘合剂的比例,泡沫回填材料的平均孔径增加。此外,泡沫回填材料的抗压强度首先增加,然后随着水 - 粘合剂的比例连续增加而降低。基于计算断层扫描(CT)图像的观察和分析,可以发现泡沫回填材料的孔径随着密度等级的增量而降低。整体研究结果表明,孔径和体积在影响用于建造黄河堤的地下管道墙壁的泡沫回填材料的性能方面发挥了重要作用。

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