CN110482995B - Environment-friendly type solid sulfur ash-fly ash compound de-air grouting material and preparation method and application thereof - Google Patents

Abstract

The invention provides a kind of solid sulfur ash-The fly ash compounded environment-friendly type void grouting material comprises the fly ash, a curing agent, an early strength agent, a water reducing agent, a defoaming agent, an expanding agent and water. In terms of performance, the invention can realize the adjustable and controllable strength of the grouting material by adjusting the proportion of the solid sulfur ash, the fly ash and the curing agent in the formula; the characteristics of high early strength and short curing time can be realized through the contents of the auxiliary agent component and the curing agent component. Meanwhile, the invention adopts industrial solid wastes such as solid sulfur ash, fly ash and the like, thereby meeting the national development requirement on environmental protection. Compared with the commonly used cement-based grouting material in the market at present, the grouting material provided by the invention has no dry shrinkage phenomenon after being cured, keeps micro-expansion of volume and has excellent dry shrinkage resistance. The cost of the grouting material is less than 180 yuan/m³The cost performance is greatly improved, and great economic benefit and social benefit are achieved.

Description

A kind of sulfur-fixing ash slag-fly ash compound environment-friendly hollow grouting material and preparation method thereof law and application

technical field

The invention belongs to the field of road engineering, bridge engineering and tunnel engineering materials, in particular to an environment-friendly hollow grouting material compounded with sulfur-fixing ash slag-fly ash and a preparation method and application thereof.

Background technique

The information disclosed in this Background section is only for enhancement of understanding of the general background of the invention and should not necessarily be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.

Roads will suffer from different degrees of diseases under the long-term effects of traffic loads and environmental factors. For the subgrade, it mainly includes deformation and sinking, hollowing out, and pulping, etc.; for the pavement, there are cracks, potholes, and uneven pavement. The occurrence of road diseases, on the one hand, reduces the road performance, affects its driving comfort, and may cause serious traffic accidents; on the other hand, it also greatly shortens the service life of the road and affects its engineering economic benefits. The disease of roadbed is generally difficult to find. If it is not treated in time, it will lead to the occurrence and deterioration of road surface disease, and then it will be manifested in the form of road surface disease.

At present, grouting technology is increasingly used in the fields of subgrade filling, foundation reinforcement and underground engineering reinforcement. At present, the most widely used grouting materials are inorganic grouting materials with cement-based materials as the main agent. Cement-based grouting materials have high mechanical properties and mature technology, and the cement slurry can meet the grouting requirements under most geological conditions. However, in terms of performance, there are shortcomings such as long initial setting time and difficult to control, low early strength, high water separation rate and easy collapse, and difficulty in filling fine cracks; in terms of cost performance, with the continuous improvement of national environmental protection requirements, cement manufacturing bases There is a shortage of materials, the production process is constantly updated, and its price has also risen sharply. The engineering maintenance cost of road engineering, bridge engineering, tunnel engineering and other fields with a huge amount of grouting material has also increased significantly.

my country's industrial scale is huge, and the output of industrial solid waste is large, and its comprehensive utilization needs to be solved urgently. Sulfur-fixing ash is the industrial solid waste produced in the coal-fired technology of the fluidized bed in the power plant. At present, the annual emission of coal-fired sulfur-fixing ash and slag in the fluidized bed is about 8000W tons. As far as my country's current national conditions and energy status are concerned, coal burning is still an important energy base in my country, so the emission of sulfur-fixing ash will remain high. At present, the emission and storage of sulfur-fixing ash and slag are large, but the utilization rate is very low. Therefore, if the sulfur-fixing ash slag can be applied in highway engineering construction on a large scale, it will not only be beneficial to environmental protection, but also make effective use of resources.

In the research and development of grouting materials, many scholars at home and abroad have carried out related research. Patent CN109627420A discloses a water-resistant organic grouting material for repairing cracks in semi-rigid base layers, which is composed of A (composite polyol, moisture absorbent, etc.) Base cracks. Patent CN109608143A discloses a quick-setting and early-strength cement-water glass double-liquid grouting material and its use method, which can be applied to advance grouting reinforcement of surrounding rocks on broken roofs to prevent roofs from falling during roadway excavation and improve roadway excavation efficiency. Patent CN106543688B discloses an organic/inorganic nanocomposite grouting material and its preparation method. The safety of mining reinforcement materials is guaranteed by compounding nano-toughening modifiers, organic polyisocyanates, etc. in the material. Patent CN109354461A discloses a polymer composite grouting material and its preparation method, which comprehensively utilizes warmer glue, polyether polyol, epoxidized soybean oil and ordinary Portland cement to solve the problem of coal goaf, highway goaf, Engineering problems such as road collapse, subgrade subsidence, dam water blocking and roof leakage. Patent CN109437815A discloses an emulsified asphalt compound red mud-boron mud filling grouting material and its preparation method, which comprehensively utilizes industrial solid wastes such as red mud and boron mud. The inventor found that the grouting materials in the patents listed above either need to be filled with organic substances, which will have a certain impact on the raw materials of the roadbed; or they still use cement as the main matrix, and the cost performance has not dropped significantly; or although they mainly use solid waste as grouting The main components of the material have shortcomings such as poor adhesion, poor dry shrinkage resistance, and inflexible strength control.

SUMMARY OF THE INVENTION

In view of the above-mentioned deficiencies of the prior art, the present invention provides an environment-friendly hollow-out grouting material compounded with sulfur-fixing ash slag-fly ash, and a preparation method and application thereof. In terms of performance, the hollow grouting material prepared by the present invention can effectively solve the engineering problems caused by road hollowing, and has high early strength, adjustable and controllable strength; in terms of material sources, the hollow grouting material of the present invention is composed of It is composed of sulfur-fixing ash, fly ash, curing agent and a series of additives, which makes full use of industrial solid wastes such as sulfur-fixing ash and fly ash. yuan/m ³ ), the present invention makes full use of the certain pozzolanic activity of the sulfur-fixing ash residue, and also cooperates with the use of an expansion agent. Compared with the existing cement-based grouting materials on the market, it has excellent resistance to drying shrinkage. At the same time, the cost of the grouting material is less than 180 yuan/m ³ , the cost performance is greatly improved, and it has greater economic and social benefits; in terms of construction application, the invention has the advantages of simple construction, convenient operation, and can effectively reduce the number of personnel required for construction. , improve efficiency and reduce road emptying maintenance costs. Therefore, it has good practical application value.

One of the objectives of the present invention is to provide a composite environment-friendly hollow-out grouting material of sulfur-fixing ash and fly ash.

The second purpose of the present invention is to provide a preparation method of the above-mentioned sulfur-fixing ash slag-fly ash compound environment-friendly devoid grouting material.

The third purpose of the present invention is to provide the application of the above-mentioned sulfur-fixing ash slag-fly ash compound environment-friendly hollow-out grouting material in the treatment of hollow-out of highway bridge head slabs.

The present invention is achieved through the following technical solutions:

A first aspect of the present invention provides a composite environment-friendly hollow-out grouting material of sulfur-fixing ash-fly ash, comprising:

Sulfur-fixing ash, fly ash, curing agent, early strength agent, water reducing agent, defoaming agent, expanding agent, water.

As a further limitation, in parts by mass, 30-80 parts of sulfur-fixing ash, 20-40 parts of fly ash, 20-60 parts of curing agent, 1-4 parts of early strength agent, and 2-6 parts of water reducing agent , 1 to 4 parts of defoaming agent, 0.01 to 0.03 parts of expansion agent, and 25 to 60 parts of water.

As a further limitation, the curing agent is composed of water glass, slaked lime, caustic soda, ordinary Portland cement and plaster of paris, and its weight ratio is water glass: slaked lime: caustic soda: ordinary Portland cement: plaster of paris=10～40 : 0 to 30: 5 to 25: 20 to 60: 30 to 50.

As a further limitation, the early strength agent is a mixture of one or more of calcium chloride, sodium chloride, aluminum chloride, and lithium chloride.

As a further limitation, the water reducing agent is a mixture of one or more of lignosulfonate, naphthalenesulfonate formaldehyde polymer, polycyclic aromatic salt or polycarboxylic acid.

As a further limitation, the defoamer is a mixture of one or more of mineral oils, polyethers, silicones or fatty alcohols.

As a further limitation, the expansion agent is a mixture of one or more of calcium sulfoaluminate, calcium oxide-calcium sulfoaluminate, calcium oxide or aluminum powder.

A second aspect of the present invention provides a method for preparing the above-mentioned sulfur-fixing ash slag-fly ash compound environment-friendly voiding grouting material, the steps are as follows:

(1) take by weighing the solid sulfur ash and fly ash, wherein the solid sulfur ash and the fly ash are screened; the solid sulfur slag is crushed, ground, and screened; The coal ash and the crushed solid sulfur slag are heated for anaerobic high temperature activation; then cooled to room temperature and mixed evenly to obtain component A.

(2) Weigh out early strength agent, water reducing agent, defoaming agent, expansion agent and water according to the amount, stir mechanically evenly, and prepare auxiliary agent B component.

(3) Weigh water glass, slaked lime, caustic soda, ordinary Portland cement and plaster of paris according to the amount, and mechanically stir evenly to obtain component C of the curing agent.

(4) During the construction, the components A, B, and C are mixed and stirred evenly according to the weight ratio of 0.8～1.5:0.08～0.25:0.4～0.6, and then injected into the void to be repaired by grouting. place.

The third aspect of the present invention provides the application of the above-mentioned sulfur-fixing ash slag-fly ash compound environment-friendly voiding grouting material in the voiding treatment of highway bridge head slabs.

Compared with the prior art, the beneficial effects of the present invention are:

(1) In the formula and preparation process of the devoid grouting material provided by the present invention, by adjusting the ratio of the sulfur-fixing ash, fly ash and the curing agent component C in the A component, the strength of the grouting material can be effectively achieved. Adjustable and controllable; at the same time, this grouting material makes full use of the pozzolanic activity of the solid sulfur ash, and in addition, with the use of an expansion agent, this grouting material forms extremely fine micro-bubbles inside the matrix, which makes grouting during use. Compared with the existing cement-based grouting materials on the market, it has excellent anti-drying ability.

(2) The grouting material provided by the present invention adopts industrial solid wastes such as sulfur-fixing ash, fly ash, etc., with low price and large reserves, which solves the problem of processing a large number of industrial solid wastes faced by our country, saves energy and protects the environment, and conforms to national requirements. Development requirements for environmental protection. Compared with the cement-based grouting materials commonly used on the market (the cost is about 300-400 yuan/m ³ ), the cost of the grouting material of the present invention is less than 180 yuan/m ³ , the cost performance is greatly improved, and it has greater economic benefits and social benefits. benefit.

(3) The hollow grouting material of the present invention can achieve the characteristics of high early strength and short curing time through the action of the auxiliary agent B component and the curing agent C component; therefore, it has good practical application value.

Detailed ways

It should be noted that the following detailed description is exemplary and intended to provide further explanation of the invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and/or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components and/or combinations thereof. It should be understood that the protection scope of the present invention is not limited to the following specific specific embodiments; it should also be understood that the terms used in the examples of the present invention are for describing specific specific embodiments, rather than for limiting the protection scope of the present invention. In the following specific embodiments, if the experimental methods of specific conditions are not indicated, they generally follow the conventional methods and conditions of molecular biology within the technical field of the art, and such techniques and conditions are fully explained in the literature.

The existing grouting materials either need to be filled with organic substances, which will have a certain impact on the raw materials of the roadbed; or still use cement as the main matrix, and the cost performance has not been greatly reduced; or although the main components of the grouting materials are mainly solid waste, there is adhesion. Insufficient strength and inflexible strength control.

In view of this, in a specific embodiment of the present invention, the first aspect of the present invention provides a composite environment-friendly devoid grouting material of sulfur-fixing ash and fly ash, including:

Sulfur-fixing ash, fly ash, curing agent, early strength agent, water reducing agent, defoaming agent, expanding agent, water.

In another specific embodiment of the present invention, in parts by mass, the sulfur-fixing ash slag-fly ash compound environment-friendly voiding grouting material comprises: 30-80 parts of sulfur-fixing ash slag, 20 parts of fly ash ~40 parts, curing agent 20-60 parts, early strength agent 1-4 parts, water reducing agent 2-6 parts, defoamer 1-4 parts, expansion agent 0.01-0.03 parts, water 25-60 parts.

The sulfur-fixing ash slag contains more anhydrite and CaO, and has the characteristics of hydration and expansion at room temperature, and its pozzolanic activity is high and the reaction resistance is small. The main oxide composition of fly ash is: SiO ₂ , Al ₂ O ₃ , FeO, Fe ₂ O ₃ and so on. The sulfur-fixing ash slag-fly ash compound environment-friendly voiding grouting material of the present invention gives full play to the activity of the sulfur-fixing ash slag, and uses the particle size difference between the fly ash to form a gradation complementation, and utilizes the main components The intensity can be adjusted according to the difference in content and content. The rational utilization of the two industrial solid wastes of sulfur-fixing ash and fly ash can effectively improve the workability between materials and give full play to the synergistic improvement effect of the two.

In yet another specific embodiment of the present invention, the sulfur-fixing ash slag includes sulfur-fixing ash and sulfur-fixing slag, wherein the sulfur-fixing ash refers to the specific surface area range >400 m ² /kg after screening treatment; The surface area after primary crushing, grinding and sieving ranges from 260 to 480 m ² /kg.

In yet another specific embodiment of the present invention, the fly ash refers to a specific surface area range of >400 m ² /kg after sieving treatment;

In another specific embodiment of the present invention, the curing agent is composed of water glass, slaked lime, caustic soda, ordinary Portland cement and plaster of paris, and its weight ratio is water glass: slaked lime: caustic soda: ordinary Portland cement: cooked Gypsum=10～40:0～30:5～25:20～60:30～50.

The curing agent of the present invention can give full play to the advantages of hardening, curing or strengthening of water glass, slaked lime, caustic soda, ordinary Portland cement and plaster of paris. , effectively improve and adjust the strength and hardness of hollow grouting materials.

In another specific embodiment of the present invention, the early strength agent is a mixture of one or more of calcium chloride, sodium chloride, aluminum chloride, and lithium chloride.

In another specific embodiment of the present invention, the water reducing agent is a mixture of one or more of lignosulfonate, naphthalenesulfonate formaldehyde polymer, polycyclic aromatic salt or polycarboxylic acid.

In another specific embodiment of the present invention, the defoamer is a mixture of one or more of mineral oils, polyethers, silicones or fatty alcohols.

In another specific embodiment of the present invention, the expansion agent is a mixture of one or more of calcium sulfoaluminate, calcium oxide-calcium sulfoaluminate, calcium oxide or aluminum powder.

In yet another specific embodiment of the present invention, there is provided a preparation method of a compound environment-friendly hollow grouting material of sulfur-fixing ash slag-fly ash, the steps are as follows:

(1) take by weighing the solid sulfur ash and fly ash, wherein the solid sulfur ash and the fly ash are screened; the solid sulfur slag is crushed, ground, and screened; The coal ash and the crushed solid sulfur slag are heated for anaerobic high temperature activation; then cooled to room temperature and mixed evenly to obtain component A.

(2) Weigh out early strength agent, water reducing agent, defoaming agent, expansion agent and water according to the amount, stir mechanically evenly, and prepare auxiliary agent B component.

(3) Weigh water glass, slaked lime, caustic soda, ordinary Portland cement and plaster of paris according to the amount, and mechanically stir them evenly to obtain component C of the curing agent.

(4) During the construction, the components A, B, and C are mixed and stirred evenly according to the weight ratio of 0.8～1.5:0.08～0.25:0.4～0.6, and then injected into the void to be repaired by grouting. place.

It should be noted that the steps (1), (2) and (3) are not in order.

In another specific embodiment of the present invention, in the step (1),

Sulfur-fixing ash and fly ash are screened at 1mm to 3mm, and the specific surface area of the sulfur-fixing ash and fly ash is >400m ² /kg;

The specific method for crushing, grinding and screening the sulfur-fixing slag is as follows: preliminary crushing the sulfur-fixing slag, then grinding for 20-40 minutes, and after screening, taking the sulfur-fixing slag powder with a specific surface area of 260-480 m ² /kg;

The specific conditions of the oxygen-free high-temperature activation are: heating at 500-600° C. for 3-5 hours; the oxygen-free high-temperature activation process can be completed in an oxygen-free high-temperature furnace.

In yet another specific embodiment of the present invention, the application of the above-mentioned sulfur-fixing ash slag-fly ash compound environment-friendly hollow-out grouting material in the hollow-out treatment of highway bridge head slabs is provided.

The present invention is further explained and illustrated by the following examples, but it does not constitute a limitation of the present invention. It should be understood that these examples are only intended to illustrate the present invention and not to limit the scope of the present invention.

Example 1

A preparation method of a sulfur-fixing ash-slag-fly ash compound environment-friendly hollow-out grouting material is as follows:

(1) Weigh 30g of solid sulfur ash and 40g of fly ash, and sieve them with 1mm respectively, and take the sample after sieving. Weigh 40 g of solid sulfur slag, crush the solid sulfur slag preliminarily, then grind it with a ball mill for 40 minutes, and sieve it with a 2mm sieve to obtain the solid sulfur slag powder with a specific surface area of 260-480 m ² /kg.

(2) The above samples were placed in an oxygen-free high-temperature furnace at 500° C. for 3 hours for high-temperature activation. Then cool to room temperature, stir and mix evenly to obtain component A.

(3) Weigh 1 g of calcium chloride as an early strength agent, 2.5 g of polycyclic aromatic salts as a water reducing agent, 1.0 g of polyethers as a defoaming agent, 0.02 g of aluminum powder as an expansion agent and 25 g of water, stir mechanically evenly, and prepare Auxiliary component B is obtained.

(4) Weigh 10 g of water glass, 10 g of slaked lime, 20 g of caustic soda, 20 g of ordinary Portland cement and 30 g of plaster of paris, respectively, and stir them mechanically to obtain component C of the curing agent.

(5) During the construction process, the components A, B and C were mixed and stirred evenly according to the weight fraction of 1:0.08:0.6, and then partially poured into the mold to measure their 3-day compressive strength and 7-day resistance Compressive strength, 28-day compressive strength, flexural strength and cured volume shrinkage ratio. Inject through the grouting pipe to the void that needs to be repaired.

Table 1 embodiment 1 performance index

Example 2

A preparation method of a sulfur-fixing ash-slag-fly ash compound environment-friendly hollow-out grouting material is as follows:

(1) Weigh 60 g of solid sulfur ash and 30 g of fly ash, and sieve them with 1 mm respectively, and take a sample after sieving. Weigh 60 g of solid sulfur slag, crush the solid sulfur slag preliminarily, then grind it with a ball mill for 40 minutes, and sieve it with a 2mm sieve to obtain the solid sulfur slag powder with a specific surface area of 260-480 m ² /kg.

(2) The above samples were placed in an oxygen-free high-temperature furnace at 500° C. for 3 hours for high-temperature activation. Then cool to room temperature, stir and mix evenly to obtain component A.

(3) Weigh 2 g of sodium chloride as an early strength agent, 2 g of polycarboxylic acid as a water-reducing agent, 3.0 g of silicone as a defoaming agent, 0.01 g of calcium sulfoaluminate as an expansion agent, and 40 g of water, stir mechanically evenly, and prepare Auxiliary B component.

(4) Weigh 40 g of water glass, 0 g of slaked lime, 20 g of caustic soda, 40 g of ordinary Portland cement and 40 g of plaster of paris, respectively, and stir them mechanically to obtain component C of the curing agent.

(5) During the construction process, the components A, B and C were mixed and stirred evenly according to the weight fraction of 1.5:0.15:0.4, and then partially poured into the mold to measure their 3-day compressive strength and 7-day resistance Compressive strength, 28-day compressive strength, flexural strength and cured volume shrinkage ratio. Inject through the grouting pipe to the void that needs to be repaired.

Table 2 embodiment 2 performance index

Example 3

A preparation method of a sulfur-fixing ash-slag-fly ash compound environment-friendly hollow-out grouting material is as follows:

(1) Weigh 80g of solid sulfur ash and 40g of fly ash, and sieve them with 2mm respectively, and take the sample after sieving. Weigh 80 g of solid sulfur slag, crush the solid sulfur slag preliminarily, then grind it with a ball mill for 20 minutes, and sieve it with a 1mm sieve to obtain the solid sulfur slag powder with a specific surface area of 260-480 m ² /kg.

(2) The above samples were placed in an oxygen-free high-temperature furnace at 500°C for 5 hours for high-temperature activation. Then cool to room temperature, stir and mix evenly to obtain component A.

(3) Weigh 4 g of aluminum chloride as an early strength agent, 6 g of water-reducing agent lignosulfonate, 4.0 g of aliphatic alcohols as a defoaming agent, 0.03 g of aluminum powder as an expansion agent, and 60 g of water, and mechanically stir evenly to prepare Auxiliary B component.

(4) Weigh 10 g of water glass, 30 g of slaked lime, 60 g of caustic soda, 60 g of ordinary Portland cement and 50 g of plaster of paris respectively according to the amount, and stir them mechanically to obtain component C of the curing agent.

(5) During the construction process, the components A, B and C were mixed and stirred evenly according to the weight fraction of 0.8:0.25:0.6, and then partially poured into the mold to measure their 3-day compressive strength and 7-day resistance Compressive strength, 28-day compressive strength, flexural strength and cured volume shrinkage ratio. Inject through the grouting pipe to the void that needs to be repaired.

Table 3 embodiment 3 performance index

Comparative Example 1

An environment-friendly hollow-out grouting material compounded with sulfur-fixing ash and fly ash, the preparation method of which is the same as that of Example 1, and the difference from Example 1 is that no sulfur-fixing ash is added.

Comparative Example 2

An environment-friendly hollow-out grouting material compounded with sulfur-fixing ash slag-fly ash, the preparation method of which is the same as that of Example 1, and the difference from Example 1 is that no expansion agent is added.

Comparative Example 3

An environment-friendly hollow-out grouting material compounded with sulfur-fixing ash slag-fly ash, the preparation method of which is the same as that of Example 1, and the difference from Example 1 is only that water glass, slaked lime and caustic soda are not added.

Table 4 shows the properties of the hollow grouting solids obtained in Comparative Examples 1-3.

Table 4

performance unit Comparative example 1 value Comparative Example 2 Values Comparative Example 3 Values Initial setting time min 100 62 110 final setting time min 300 180 405 3d compressive strength MPa 3.01 7.21 2.32 7d compressive strength MPa 5.56 10.45 4.09 28d compressive strength MPa 8.82 20.89 6.67 3d flexural strength MPa 0.73 2.91 0.24 7d flexural strength MPa 1.29 3.45 0.98 Curing volume shrinkage ratio % -0.04 15 3

From the comparison between Table 4 and Table 1-3, it can be seen that the strength of the grouting material will be greatly reduced if the sulfur-fixing ash is not used; The pozzolanic activity of the sulfur-fixing ash slag has a synergistic effect, making the grouting slurry have excellent resistance to volume shrinkage; at the same time, the absence of water glass, slaked lime and caustic soda also greatly reduces the strength of the grouting slurry. Alkali excitation can effectively improve the strength of grouting materials.

It should be noted that the above examples are only used to illustrate the technical solutions of the present invention but not to limit them. Although the present invention has been described in detail with reference to the given examples, those skilled in the art can modify or equivalently replace the technical solutions of the present invention as required without departing from the spirit and scope of the technical solutions of the present invention.

Claims (9)

1. a kind of sulfur-fixing ash slag-fly ash compound environment-friendly voiding grouting material, it is characterized in that: In parts by mass, it includes: 30-80 parts of sulfur-fixing ash, 20-40 parts of fly ash, 20-60 parts of curing agent, 1-4 parts of early strength agent, 2-6 parts of water reducing agent, defoaming agent 1-4 parts of agent, 0.01-0.03 parts of swelling agent, 25-60 parts of water; The curing agent is composed of water glass, slaked lime, caustic soda, ordinary Portland cement and plaster of paris; in terms of weight ratio, water glass: slaked lime: caustic soda: ordinary Portland cement: plaster of paris=10～40:0～30 : 5 to 25: 20 to 60: 30 to 50. 2. a kind of sulfur-fixing ash slag-fly ash compound environment-friendly voiding grouting material as claimed in claim 1, it is characterized in that: described sulfur-fixing ash slag comprises sulfur-fixing ash and sulfur-fixing slag, wherein solid After the sulfur ash is screened, the specific surface area is more than 400m ² /kg; the surface area of the solid sulfur slag is 260-480m ² /kg after preliminary crushing, grinding and screening; After the fly ash is screened, the specific surface area is more than 400 m ² /kg. 3. a kind of sulfur-fixing ash slag-fly ash compound environment-friendly hollow grouting material as claimed in claim 1, it is characterized in that: described early strength agent is calcium chloride, sodium chloride, aluminum chloride , a mixture of one or more of lithium chloride. 4. a kind of sulfur-fixing ash slag-fly ash compound environment-friendly voiding grouting material as claimed in claim 1, it is characterized in that: water reducing agent is lignosulfonate, naphthalenesulfonate formaldehyde polymer , a mixture of one or more of polycyclic aromatic salts or polycarboxylic acids. 5. a kind of sulfur-fixing ash slag-fly ash compound environment-friendly voiding grouting material as claimed in claim 1, is characterized in that: defoamer comprises mineral oil, polyether, organosilicon or fat A mixture of one or more of the alcohols. 6. a kind of sulfur-fixing ash slag-fly ash compound environment-friendly voiding grouting material as claimed in claim 1, it is characterized in that: expansion agent comprises calcium sulfoaluminate class, calcium oxide-calcium sulfoaluminate class , a mixture of one or more of calcium oxides. 7. The preparation method of the sulfur-fixing ash slag-fly ash compound environment-friendly hollow-out grouting material according to any one of claims 1-6, characterized in that: comprising: (1) take by weighing the solid sulfur ash and fly ash, wherein the solid sulfur ash and the fly ash are screened; the solid sulfur slag is crushed, ground, and screened; Coal ash and crushed solid sulfur slag are heated for anaerobic high-temperature activation; then cooled to room temperature, and mixed evenly to obtain component A; (2) Weigh early strength agent, water reducing agent, defoaming agent, expansion agent and water according to the amount, stir mechanically evenly, and prepare auxiliary agent B component; (3) Weigh water glass, slaked lime, caustic soda, ordinary Portland cement and plaster of paris by amount, stir evenly, and obtain the component C of the curing agent; (4) During the construction process, the components A, B and C should be After the weight ratio of 1:0:08～0.25:0.4～0.6 is mixed and stirred evenly, it is injected into the void that needs to be repaired by grouting; The steps (1), (2) and (3) are in no order. 8. The preparation method of the sulfur-fixing ash slag-fly ash compound environment-friendly voiding grouting material described in claim 7, is characterized in that: in described step (1), Sulfur-fixing ash and fly ash are screened at 1mm to 3mm, and the specific surface area of the sulfur-fixing ash and fly ash is >400m ² /kg; The specific method for crushing, grinding and screening the sulfur-fixing slag is as follows: preliminary crushing the sulfur-fixing slag, then grinding for 20-40 minutes, and after screening, taking the sulfur-fixing slag powder with a specific surface area of 260-480 m ² /kg; The specific conditions for the oxygen-free high-temperature activation are: heating at 500-600° C. for 3-5 hours. 9. The application of the sulfur-fixing ash slag-fly ash compound environment-friendly hollow-out grouting material according to any one of claims 1-6 in the hollow-out treatment of highway bridge head slabs.