Fly ash-based filling slurry as well as preparation method and application thereof

By adjusting the specific surface area of ​​fly ash and the molecular weight of polyether polyol, a gel network is formed, which solves the problem of suspension stability of fly ash-based filling slurry under long-distance transportation and static conditions, and achieves long-term suspension stability and good transportability.

CN122255702APending Publication Date: 2026-06-23TAIYUAN UNIVERSITY OF TECHNOLOGY
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Patent Information

Application Number
CN202610460694.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-09
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing technologies cannot maintain the long-term suspension stability of fly ash-based filling slurry under long-distance transportation and static conditions, leading to particle sedimentation and segregation, which affects performance and engineering quality.

Method used

By controlling the specific surface area of ​​fly ash and the number-average molecular weight of polyether polyol, an immobilized layer and gel network are formed, thereby achieving the dispersion and suspension stability of fly ash particles and inhibiting agglomeration and sedimentation.

Benefits of technology

The prepared fly ash-based filling slurry maintains good suspension stability and consistent viscosity before and after settling, exhibiting long-term suspension stability and is suitable for pipeline transportation and settling storage.

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Abstract

The invention provides fly ash-based filling slurry as well as a preparation method and application thereof, and relates to the technical field of fluid conveying engineering. The fly ash-based filling slurry provided by the invention is prepared from the following components in parts by mass: 20 to 360 parts of fly ash and 10 to 100 parts of polyether polyol, the average specific surface area of the fly ash is 13-25 m < 2 > / g; the number average molecular weight of the polyether polyol is 600 to 2000. According to the invention, polyether polyol is adsorbed on the surface of fly ash to form an immobilization layer, and percolation of the immobilization layer forms a gel network, so dispersion and suspension stability of fly ash particles are realized; and the filling slurry with long-acting suspension stability is obtained by controlling the specific surface area of the fly ash and the number-average molecular weight of the polyether polyol. Experimental results show that the fly ash-based filling slurry is basically consistent in viscosity before and after standing, good in long-acting suspension stability, relatively low in viscosity and good in pipeline conveying performance.
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