Preprint Article Version 2 Preserved in Portico This version is not peer-reviewed

Time-Dependent Rheological Properties of Cemented Aeolian Sand-Fly Ash Backfill Vary with the Ratio of Aeolian Sand / Coal Gangue and Plasticizer

Version 1 : Received: 4 July 2023 / Approved: 5 July 2023 / Online: 5 July 2023 (12:35:49 CEST)
Version 2 : Received: 6 July 2023 / Approved: 6 July 2023 / Online: 6 July 2023 (09:05:13 CEST)

A peer-reviewed article of this Preprint also exists.

Yang, B.; Zheng, Z.; Jin, J.; Wang, X. Time-Dependent Rheological Properties of Cemented Aeolian Sand-Fly Ash Backfill Vary with Particles Size and Plasticizer. Materials 2023, 16, 5295. Yang, B.; Zheng, Z.; Jin, J.; Wang, X. Time-Dependent Rheological Properties of Cemented Aeolian Sand-Fly Ash Backfill Vary with Particles Size and Plasticizer. Materials 2023, 16, 5295.

Abstract

The use of cemented aeolian sand-fly ash backfill (CAFB) material to fill the mining area to improve the surface subsidence damage caused by underground coal mining is in the development stage. Their performance with large overflow water and strength loss is not well understood. Few research has been conducted to understand the effects of aeolian sand and coal gangue on the rheological properties of CAFB with plasticizers. Therefore, the aim of this study is to investigate the effects of a plasticizer on the rheological properties, specifically yield stress and viscosity, of CAFB prepared with aeolian sand and coal gangue. CAFB mixes containing 0%, 0.05%, and 0.1% plasticizer were prepared, and yield stress and viscosity were determined at different time intervals over the period. Additional tests, such as thermal analysis and zeta potential analysis were also conducted. It was found that the rheological properties of CAFB is the comprehensive manifestation of the composite characteristics of various models. Reasonable particle size distribution and less amount of plasticizer can ensure the stability of slurry structure, reduce the slurry settlement and the risk of pipe blocking. The findings of this study will be beneficial in the design and production of CAFB material.

Keywords

Cemented aeolian sand-fly ash backfill; Aeolian sand and coal gangue-filled slurry; Rheological; Plasticizer; Particle gradation

Subject

Environmental and Earth Sciences, Waste Management and Disposal

Comments (1)

Comment 1
Received: 6 July 2023
Commenter: zhijun zheng
Commenter's Conflict of Interests: Author
Comment: Dear Editor:
  My article is modified according to the layout format of materials and some references from recent years are added to facilitate the publication of the article, thank you.
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