Coupling temperature, cement hydration and rheological behaviour of fresh cemented paste backfill

Wu, Di; Fall, Mamadou; Cai, Sijing

doi:10.1016/j.mineng.2012.11.011

Cited by 152 publications

(44 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As shown in Figure 1, the content of − 200 mesh particles is 88.73%, and the − 20 μm particles account for 47%, which means the overall particle size is a little fine, while waste rocks, with − 200 mesh particles accounting for 20.12% and − 20 μm particles accounting for 13.1%, are mainly coarse particles. It can be summarized from the composition of material particles that any of the materials cannot meet the requirements of the amount of − 20 μm particles [9,26]; thus, the two kinds of materials are needed to be mixed at a certain proportion.…”

Section: Basic Physical and Chemicalmentioning

confidence: 99%

A Novel Prediction Model of Strength of Paste Backfill Prepared from Waste-Unclassified Tailings

Zhang

2019

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

Paste backfilling is an important support for the development of green mines and deep mining. It can effectively reduce a series of risks of underground goaf and surface tailings ponds. Reasonable strength of backfill is an effective guarantee for controlling ground stress and realizing safe mining function. Under the combination of complex materials and local conditions, ensuring the optimal design and effective proportion for paste backfill strength is the bottleneck problem that restricts the safety, economy, and efficiency of filling mining. The strength developing trend of paste backfilling prepared from waste rock and unclassified tailings has been studied. Different levels of cement contents, tailings-waste ratios, and slurry concentrations were investigated through orthogonal design to obtain the relationship between the UCS and the multi-influential factors. Combined with the experimental results and the previous strength prediction models, the waste rock-unclassified tailings paste strength prediction model was proposed. Introducing the water-cement ratio, the cement-tailings ratio, the amount of cement, and the packing density that characterizing the overall gradation of unclassified tailings and waste rock, as well as the curing time, a strength prediction model of multifactors was developed. Moreover, the microscopic structure of the paste prepared from waste-unclassified tailings was analyzed with an Environment Scanning Electron Microscope (ESEM), and the influence mechanism was ascertained. The weight coefficient of strength development is carded in this paper, and the strength model of unclassified tailings-waste paste considering five factors is obtained, which is of great significance to guide the mining engineering.

show abstract

Section: Basic Physical and Chemicalmentioning

confidence: 99%

A Novel Prediction Model of Strength of Paste Backfill Prepared from Waste-Unclassified Tailings

Zhang

2019

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

show abstract

“…According to Fig. 5, it can also be concluded that the CGF slurry behaves like Bingham plastic fluid [26,27]:…”

Section: Development Of the Pipe Flow Modelmentioning

confidence: 89%

Pressure drop in loop pipe flow of fresh cemented coal gangue–fly ash slurry: Experiment and simulation

Yang

Liu

2015

Advanced Powder Technology

View full text Add to dashboard Cite

“…After being uniformly mixed and stirred, TFB can be considered as a homogeneous full-pipe flow and treated as an incompressible steady flow [18]. The Euler method was selected as the slurry model, the inlet boundary of the vertical duct as velocity inlet, and the outlet boundary of the horizontal duct as outflow [19].…”

Section: Pipeline Transportation Simulationmentioning

confidence: 99%

Utilization of Foaming Technology in Cemented Paste Backfill of High-Mud Superfine Unclassified Tailings

Zhao

Wang

Peng

et al. 2017

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

Due to high-mud content in superfine unclassified tailings (SUT), the viscosity of cemented paste backfill (CPB) is high and its pipeline transportation properties are poor. Foaming technology was introduced to prepare a new three-phase flow backfill (TFB) using a foaming machine. Then the rheological parameters of TFB with different bubble ratio were measured and their pipeline transportation properties were simulated by Fluent. Besides, the simulation results were further verified by a semi-industrial loop test. The results indicate that the optimum ratio of TFB is a cement-sand ratio of 1 : 8, mass concentration of 70%, and bubble ratio of 20%. Compared with CPB, the decrease of bleeding rate, viscosity, and resistance loss of TFB is 27%, 25%, and 30%, respectively. Therefore, foaming technology is an innovative and feasible solution for high-mud CPB in reducing viscosity, decreasing resistance loss, and improving pipeline transporting efficiency.

show abstract

Coupling temperature, cement hydration and rheological behaviour of fresh cemented paste backfill

Cited by 152 publications

References 42 publications

A Novel Prediction Model of Strength of Paste Backfill Prepared from Waste-Unclassified Tailings

A Novel Prediction Model of Strength of Paste Backfill Prepared from Waste-Unclassified Tailings

Pressure drop in loop pipe flow of fresh cemented coal gangue–fly ash slurry: Experiment and simulation

Utilization of Foaming Technology in Cemented Paste Backfill of High-Mud Superfine Unclassified Tailings

Contact Info

Product

Resources

About