A novel supplementary cementitious material based on calcined drill cuttings with waste glass to accelerate cement hydration

Yang, Jun; Chen, Mingyan; Wang, Ziming; Yan, Xuan; Xie, Guotuan; Liu, Yucheng

doi:10.1016/j.matchemphys.2023.127679

Cited by 2 publications

(1 citation statement)

References 32 publications

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“…The current treatment of waste glass in the field of environmental protection primarily involves recycling or landfilling. However, landfilling consumes significant land resources and gives rise to environmental issues 1 – 3 . The utilization of waste glass as a backfill material for mine tailings not only effectively addresses the issue of waste glass, but also enhances the stability and plasticity of tailings backfill, thereby reducing mining activities and environmental footprint while achieving the dual objectives of resource recovery and environmental protection 4 – 7 .…”

Section: Introductionmentioning

confidence: 99%

Evolutionary patterns and microscopic mechanisms of strength in mine tailings backfilled with waste glass

Deng,

Gao,

Chen

et al. 2024

Sci Rep

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In order to promote the sustainable use of resources and reduce the waste of waste glass and tailings resources. The present study focuses on a fluorite mine as the research subject, utilizing coarse tailings, fine tailings, cement substitute-curing agent, and recycled waste glass as the primary raw materials. It investigates the changes in compressive strength of coarse tailing with varying sand- binder ratios and glass content at 3-day, 7-day, and 28-day intervals when the filling slurry concentration is set at 77% and the ratio of coarse tailings to fine tailings is maintained at 2:1. The findings indicate that there is minimal impact on the compressive strength of test blocks when using a sand binder ratio of 4:1 and a glass sand content below 10%. However, once the glass sand content exceeds 10%, a significant decline in compressive strength occurs. Scanning electron microscope (SEM) images reveal ettringite crystal formation in test blocks with both 0% and 25% glass sand content due to high levels of Na2O in the glass sand. This leads to internal expansion within test blocks resulting in reduced strength. Notably, when using a sand-binder ratio of 8:1 along with a glass sand content of 25%, early strength characteristics are observed for test blocks. Furthermore, incorporating glass sand has little influence on late-stage strength for backfill when employing either an 8:1 or 12:1 sand-binder ratio. Based on this experiment conducted under conditions including mass concentration of 77%, the optimal waste-glass-to-mine-tailings-filling-sand-binder-ratio is determined as 8:1with a corresponding glass content of 25%.

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