Experimental study on tailings cementation by MICP technique with immersion curing

• DOI: 10.1371/journal.pone.0272281
• Publication Date: 2022-08-01T18:04:34Z
• Authors: Changyu Jin; Huiyang Liu; Mingxiao Guo; Yunfeng Wang; Jinyao Zhu
• Keywords: Cementation (geology)

The filling mining method is an effective for controlling ground stress and preventing surface subsidence in the field during exploitation of underground resources. Tailings can be utilized as material, so to realize reuse industrial waste. However, utilization traditional Portland cement cementing material tailings leads groundwater pollution. In addition, production results consumption a great amount ore air this paper, cementation by using microbial induced calcite precipitation (MICP) technique with immersion curing proposed. are cemented MICP aerobic bacteria ( Sporosarcina pasteurii ) under soaked environment. variable control applied investigate factors influencing effects , including bacterial solution concentration, particle size tailings, temperature. indicate that: when OD 600 1.6, urea concentration 0.75 mol/L, raw materials without grinding, temperature 30°C, effect best. view uneven calcification mixed Castellaniella denitrificans used cementation. Higher strength achieved. It proved that facultative anaerobes