Influence of mass concentration, cement-to-tailings ratio, and stirring duration on the strength of CPB considering pore characteristics

Zhang, Y.; Gan, Dan; Zhi, Xue; Lu, Hongjian

doi:10.1007/s13762-022-04172-1

Cited by 4 publications

(1 citation statement)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Cement tailings backfill (CTB) is a multi-phase material formed by mixing a certain proportion of tailings and water with cement as the main cementitious material through mixing, shaking, curing, etc. It is used for underground mine filling and has the advantages of no pollution, low energy consumption and good roof connection performance [6][7][8]. The mechanical properties of the CTB are an essential basis for assessing the safety of mining operations and for calculating the occurrence of geological hazards.…”

Section: Introductionmentioning

confidence: 99%

Effect of Waste Clay Bricks on the Performance of Cemented Tailings Backfill and Its Damage Constitutive Model

et al. 2023

View full text Add to dashboard Cite

In this study, two types of cemented tailings backfill (CTB) were prepared by breaking up the waste clay bricks (WCB) from dismantled buildings and replacing part of the cement with brick powder and part of the tailings with brick aggregate. The mechanical properties of the modified CTB were investigated. The results showed that the strength of CTB with 10% brick powder content increased by 16.24% at the curing age of 28 days, while the content of 20% brick powder only decreased by 0.11%. The strength of the brick aggregate with less than 20% content can be increased at each curing age, and the strength of the 15% brick aggregate at the curing age of 7 d and 28 d is increased by 65.54 and 58.8%. The failure strain of the CTB-containing brick powder decreases with the extension of the curing time, and the failure strain of the CTB-containing brick aggregate decreases significantly at the curing age of 7 days. In addition, a three-stage damage constitutive model was established based on the results obtained in the present study, and the laboratory test results of CTB under uniaxial compression were effectively described with high confidence.

show abstract

Section: Introductionmentioning

confidence: 99%