Experimental study on the triaxial mechanical behaviors of the Cemented Paste Backfill: Effect of curing time, drainage conditions and curing temperature

2022 ◽  
Vol 301 ◽  
pp. 113828
Author(s):  
Zhanguo Xiu ◽  
Shuhong Wang ◽  
Yingchun Ji ◽  
Feili Wang ◽  
Fengyu Ren
Keyword(s):  
Experimental Study ◽  
Curing Temperature ◽  
Cemented Paste Backfill ◽  
Curing Time ◽  
Mechanical Behaviors ◽  
Paste Backfill

Effects of curing time and ice-to-water ratio on performance of cemented paste backfill containing ice slag

2019 ◽  
Vol 228 ◽  
pp. 116639 ◽  
Author(s):  
Lang Liu ◽  
Chao Zhu ◽  
Chongchong Qi ◽  
Mei Wang ◽  
Chao Huan ◽  
...  
Keyword(s):  
Cemented Paste Backfill ◽  
Curing Time ◽  
Paste Backfill ◽  
Water Ratio

Fluidity and Mechanical Behavior of Cement Solidified Lead-Zinc Mine Tailings

2014 ◽  
Vol 898 ◽  
pp. 383-386 ◽  
Author(s):  
Chun Lei Zhang ◽  
Shun Cai Wang ◽  
Fan Lu Min
Keyword(s):  
Mine Tailings ◽  
Cement Content ◽  
Strength Increase ◽  
Cemented Paste Backfill ◽  
Curing Time ◽  
Test Results ◽  
The World ◽  
Paste Backfill ◽  
Lead Zinc ◽  
Zinc Mine

Cemented paste backfill method has been widely used in many modern mines throughout the world due to the increasingly stringent environmental regulations and short of disposal land. This study presents experimental results on the use of Portland cement in the solidification of Pb-Zn tailings in China. Test results show UCS strength increase lineally with cement content, tailings concentration, and curing time, respectively. There exist a minimum cement content and tailings concentration to produce obvious strength. The fluidity decrease quickly with cement proportion and tailings concentration, under the satisfying of a minimum pumping fluidity, the increase of tailings concentration can effectively reduce the cement consumption so as to decrease the treatment cost.

An experimental study on the early-age hydration kinetics of cemented paste backfill

2019 ◽  
Vol 212 ◽  
pp. 283-294 ◽  
Author(s):  
Lang Liu ◽  
Pan Yang ◽  
Chongchong Qi ◽  
Bo Zhang ◽  
Lijie Guo ◽  
...  
Keyword(s):  
Experimental Study ◽  
Early Age ◽  
Cemented Paste Backfill ◽  
Hydration Kinetics ◽  
Paste Backfill ◽  
Kinetics Of ◽  
Early Age Hydration

scholarly journals Insight into Saturated Hydraulic Conductivity of Cemented Paste Backfill Containing Polycarboxylate Ether-Based Superplasticizer

Minerals ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 93
Author(s):  
Sada Haruna ◽  
Mamadou Fall
Keyword(s):  
Hydraulic Conductivity ◽  
Environmental Performance ◽  
Mining Industry ◽  
Design Criterion ◽  
Saturated Hydraulic Conductivity ◽  
Curing Temperature ◽  
Partial Replacement ◽  
Cemented Paste Backfill ◽  
Curing Conditions ◽  
Paste Backfill

Recycling of tailings in the form of cemented paste backfill (CPB) is a widely adopted practice in the mining industry. Environmental performance is an important design criterion of CPB structures. This environmental performance of CPB is strongly influenced by its saturated hydraulic conductivity (permeability). Superplasticizers are usually added to improve flowability, but there is a limited understanding of their influence on the hydraulic properties of the CPB. This paper presents new experimental results on the variations of the hydraulic conductivity of CPB containing polycarboxylate-based superplasticizer with different compositions and curing conditions. It is found that the hydraulic conductivity of the CPB decreases with the addition of superplasticizer, which is beneficial to its environmental performance. The reduction is largely attributable to the influence of the ether-based superplasticizer on particles mobility and cement hydration. Moreover, both curing temperature and time have correlations with the hydraulic conductivity of CPB containing superplasticizer. In addition, the presence of sulfate and partial replacement of PCI with blast furnace slag reduces the hydraulic conductivity. The variations are mainly due to the changes in the pore structure of the CPB. The new results discussed in this manuscript will contribute to the design of more environmental-friendly CPBs, which is essential for sustainable mining.

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