Coal gangue powder-based grouting material for pavement voids and preparation method of coal gangue powder-based grouting material

A technology of grouting material and coal gangue powder, which is applied in the field of coal gangue powder-based grouting materials and its preparation, and can solve problems such as ineffective utilization of coal gangue, ecological environment damage, and high bleeding rate

Inactive Publication Date: 2020-04-21
CHANGAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But every ton of cement produced will release 1 ton of CO 2 , and with the emission of a large amount of NO x , SO x and dust, the production of cement consumes a lot of energy and causes great damage to the ecological environment
The bleeding rate of the cement slurry material is high, which is easy to cause the precipitated water to enter the base layer and aggravate the water damage
[0004] On the other hand, my country pro

Method used

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  • Coal gangue powder-based grouting material for pavement voids and preparation method of coal gangue powder-based grouting material

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preparation example Construction

[0035] A method for preparing a coal gangue powder-based grouting material for pavement voiding, comprising the following specific steps:

[0036] The first step, weigh the following raw materials by mass parts, 80-100 parts of coal gangue powder, 40-60 parts of fly ash, 30-60 parts of slag powder, 60-90 parts of water, 200-400 parts of sand, 54 -80 parts of water glass solution, 8-20 parts of KOH solid, 1-2 parts of defoamer, 3-5 parts of expansion agent, 1-2 parts of retarder, 1-2 parts of redispersible latex powder;

[0037] The second step is to prepare liquid B: Weigh the water glass solution and KOH solid, pour the KOH solid into the water glass solution and stir slowly until it is completely dissolved. Since the KOH solid dissolves in the water glass solution, it will release heat, so it needs to be stirred slowly. stir;

[0038] The third step is to prepare the A mixture: Put the weighed coal gangue powder, slag powder, fly ash, sand, defoamer, redispersible latex pow...

Embodiment 1

[0041] Step 1), weigh raw materials by mass parts:

[0042] 80 parts of coal gangue powder, 40 parts of slag powder, 60 parts of fly ash, 70 parts of water, 200 parts of gravel, 55 parts of water glass solution, 8 parts of KOH solid, 1 part of defoamer, 3 parts of expansion agent, retarder 1 part, 1 part of redispersible latex powder;

[0043] Step 2), mix the weighed KOH solid into the water glass solution, stir until the KOH solid is completely dissolved, and obtain B component;

[0044] Step 3), put the weighed coal gangue powder, slag powder, fly ash and sand into the mixer for dry mixing and mixing evenly, so that the powder is fully mixed, and increase the amount of coal gangue powder, slag powder, fly ash and sand Then put coal gangue powder, slag powder, fly ash, sand, defoamer, expansion agent, retarder, and redispersible latex powder into the mixer for 3-5 minutes to make them evenly mixed , to increase the contact area between the components; then put in water and m...

Embodiment 2

[0047] Step 1), weigh raw materials by mass parts:

[0048] 80 parts of coal gangue powder, 60 parts of slag powder, 60 parts of fly ash, 90 parts of water, 200 parts of gravel, 80 parts of water glass solution, 16 parts of KOH solid, 1 part of defoamer, 5 parts of expansion agent, retarder 2 parts, 1 part of redispersible latex powder;

[0049] Step 2), mix the weighed KOH solid into the water glass solution, stir until the KOH solid is completely dissolved, and obtain B component;

[0050] Step 3), put the weighed coal gangue powder, slag powder, fly ash and sand into the mixer for dry mixing and mixing evenly, so that the powder is fully mixed, and increase the amount of coal gangue powder, slag powder, fly ash and sand Then put coal gangue powder, slag powder, fly ash, sand, defoamer, expansion agent, retarder, and redispersible latex powder into the mixer for 3-5 minutes to make them evenly mixed , to increase the contact area between the components; then put in water a...

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Abstract

The invention discloses a coal gangue powder-based grouting material for pavement voids and a preparation method of the coal gangue powder-based grouting material. Gravel is used as a supporting material to improve the overall strength of the grouting material, coal gangue powder, slag powder and coal ash are added, and an alkaline activator is used for activation of the above materials so as to prepare a material with gelling capacity; the gravel is used as a filling material to support a void area of a pavement, and the coal gangue powder and other powder can permeate into fine pores of thegravel, so the grouting material and a pavement structure are bonded into a whole through the permeation of fine materials; and a solution prepared from a sodium silicate solution and a NaOH solid isadopted, active silicon, aluminum and calcium substances in the coal gangue powder, the slag powder and the coal ash are dissolved by using the sodium silicate solution and KOH and then re-aggregatedto form a solution composed of C-S-H hydrated calcium silicate, a C-S-A-H hydrated calcium aluminosilicate hydration product, the sodium silicate solution and KOH, and the formed solution enables thecoal gangue powder and aluminum oxide in the slag powder to react firstly, can prevent too fast coagulation caused by too much coal ash, and the working performance of the grouting material is improved.

Description

technical field [0001] The invention relates to the field of road grouting materials, in particular to a coal gangue powder-based grouting material used for road surface voiding and a preparation method thereof. Background technique [0002] With the development of road construction, a considerable number of cement concrete pavements are built in all levels of roads in my country. Cement pavement has many advantages such as good durability, large bearing capacity, and simple construction machinery. Due to the existence of cement pavement joints, water can easily enter the bottom of the cement pavement slab. At the same time, under the repeated action of vehicle loads, the water at the bottom of the slab forms high-pressure dynamic water that continuously scours the pavement slab and the base layer, causing fine particles in the base material to escape from the gaps between the slabs. Spew out to form pumping disease. Slurry disease will lead to voids formed by continuous er...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B111/70C04B18/12
CPCC04B28/006C04B2111/0075C04B2111/70C04B18/12C04B18/08C04B18/141C04B14/06C04B12/04C04B22/062C04B22/143C04B24/06C04B24/2641C04B2103/50Y02W30/91
Inventor 张争奇田中男卢川刘恒彬方滢杨建华许铖赵勤胜强亚奎
Owner CHANGAN UNIV
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