Abstract
Aiming at the unconfined compressive strength of the new self-flow platform backfill material which is called liquid soil, indoor tests were carried out with electro-hydraulic pressure testing machine. The effects of different water content, cement content, admixture type and admixture content on the strength of liquid soil are comprehensively analyzed. The results show: the influence of water content on the strength of liquid soil is obvious, and the function relationship of the quadratic equation is presented between them. The unconfined compressive strength of liquid soil increases remarkably with the increase of cement content, showing a trend of e-index growth. The active mineral powder has a certain increase in strength but a lower rate of increase. The water reducing agent slightly increases its strength and then slightly decreases and medium sand makes its strength increase significantly.
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