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Coal gangue-based composite geopolymer grouting filling material and preparation method thereof

A filling material and geopolymer technology, which is applied in the field of coal gangue-based composite geopolymer grouting filling material and its preparation, can solve the problems of high stone body strength, ineffective reinforcement of roadbed, and accelerated reaction rate, etc.

Inactive Publication Date: 2020-04-17
CHANGAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A single coal gangue powder used as the base material of the grouting material will make the stone body insufficient in strength and fail to achieve the ideal roadbed reinforcement and reinforcement effect; while the slag powder has high activity, fast response, and high cost, and too much slag powder will make the reaction rate Speeding up, can not get enough gelling time to complete the grouting, and the strength of the stone body is high, injecting into the subgrade will easily make the local strength high but will affect the unity of the layer strength; and too much coal gangue powder will lead to low strength , cannot effectively reinforce the subgrade
Thus limiting the application of blast furnace slag

Method used

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  • Coal gangue-based composite geopolymer grouting filling material and preparation method thereof
  • Coal gangue-based composite geopolymer grouting filling material and preparation method thereof

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preparation example Construction

[0035] A preparation method of coal gangue-based composite geopolymer grouting filling material, comprising the following steps:

[0036] Step 1), take the following raw materials in parts by mass: 100-140 parts of slag powder, 60-100 parts of coal gangue powder, 60-100 parts of water, 30-48 parts of water glass solution, 4-10 parts of KOH solid, 1 -2 parts of water reducer, 2-5 parts of toughening agent, 1-2 parts of retarder and 1 part of expansion agent;

[0037] Step 2), mix the KOH solid and the water glass solution until the KOH solid is completely dissolved to obtain the B solution. Since the KOH solid dissolves in the water glass solution and dissolves quickly and emits a large amount of heat, if a large amount is prepared, it needs to be added in batches and stirred slowly;

[0038] Step 3), dry slag powder and coal gangue powder in a blender and mix evenly, then put retarder, water reducing agent, water and toughening agent in turn and mix uniformly to obtain A mixtu...

Embodiment 1

[0042] Step 1), get the following raw materials by mass parts:

[0043] 120 parts of slag powder above grade S95, 80 parts of 325 mesh gangue powder, 80 parts of water, 40 parts of water glass solution, 5 parts of KOH solid, 1 part of water reducer, 3 parts of toughening agent, 1 part of retarder, expansion 1 dose.

[0044] Step 2), pour the weighed KOH solid into the water glass solution and stir until the KOH is completely dissolved to obtain the B solution;

[0045] Step 3), the weighed slag powder and coal gangue powder were dry-stirred and mixed evenly in a mixer, then put in water reducing agent and water in sequence, and stirred at 100r / min for 5min to obtain the A mixture;

[0046] Step 4), mix the B solution and the A mixture, and stir at 300r / min for 2min to obtain a composite geopolymer grouting material;

[0047] Step 5), testing the fluidity and water separation rate of the prepared grouting material, pouring the prepared grouting material into the mold, putting i...

Embodiment 2

[0050] Step 1), get the following raw materials by mass parts:

[0051] 100 parts of S95 and above blast furnace slag powder, 100 parts of coal gangue powder, 60 parts of water, 48 parts of water glass solution, 8 parts of KOH solid, 2 parts of water reducer, 4 parts of toughening agent, 2 parts of retarder, expansion agent 1 copy;

[0052] Step 2), pour the weighed KOH solid into the water glass solution and stir until the KOH is completely dissolved to obtain the B solution;

[0053] Step 3), dry-mix the weighed slag powder and coal gangue powder in a mixer, then add water reducer and water in turn, and stir at 110r / min for 5min to obtain A mixture;

[0054] Step 4), mix solution B and mixture A, and stir at 200 r / min for 3 minutes to obtain a composite geopolymer grouting material.

[0055] Step 5), testing the fluidity and water separation rate of the prepared grouting material, pouring the prepared grouting material into the mold, putting it into the curing box for 7 da...

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Abstract

The invention discloses a coal gangue-based composite geopolymer grouting filling material and a preparation method thereof. The preparation method comprises a step of weighing raw materials in partsby mass. According to the method, coal gangue powder and slag powder are used as main raw materials; a KOH solid and a water glass solution form an alkali solution; slag powder with good activation performance and ground coal gangue powder with insufficient activation performance are subjected to alkali-excited activation by adopting an alkali excitation technology, active glass bodies in the slagpowder and active components such as SiO2 and Al2O3 in the coal gangue powder are leached out in a strong alkali environment to form a grouting material with a gelling effect, and compared with a cement material, the grouting material is lower in manufacturing cost and wide in material source; meanwhile, comprehensive and effective utilization of coal gangue is improved, stacking of a large amount of coal gangue is reduced, and good environmental protection and social benefits are achieved. Compared with a cement grouting material, the grouting material prepared by the invention is lower in bleeding rate and higher in stone rate, has a rapid hardening effect, can reduce water damage caused by permeation of water into a roadbed in a non-setting stage of slurry, and effectively reduces airshrinkage and crack extension after slurry hardening.

Description

technical field [0001] The invention relates to the field of road grouting materials, in particular to a coal gangue-based composite geopolymer grouting filling material and a preparation method thereof. Background technique [0002] With the continuous increase of highway traffic volume, in some places with poor geology, the local strength of the subgrade is insufficient, the subsidence of the subgrade or the dynamic water erosion of the base, resulting in different degrees of subsidence of the road surface or hollowing out of the bottom of the slab, which poses a serious hazard to the safety of vehicles on the road. . On the other hand, a large amount of blast furnace slag is produced in the steelmaking process in various parts of my country. Due to the limited comprehensive utilization ability of blast furnace slag, a large amount of blast furnace slag is piled up to occupy the land and cause dust pollution to surrounding areas. As a by-product of coal mining, coal gangu...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B18/12C04B111/70
CPCC04B28/006C04B2111/00732C04B2111/0075C04B2111/70C04B18/141C04B18/12C04B12/04C04B22/062C04B2103/302C04B24/06C04B22/143C04B24/2641C04B24/42Y02W30/91Y02P40/10
Inventor 张争奇田中男唐秀明徐玉峰李宏伟王猛王玉洁宋文涛陈申广
Owner CHANGAN UNIV
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