CN110482995A - A kind of fluidized bed combustion coal ash/slag-flyash compounding environment-friendly type is come to nothing injecting paste material and its preparation method and application - Google Patents

Abstract

The present invention provides a sulfur-fixing ash-fly ash composite environment-friendly venting grouting material and its preparation method and application. The sulfur-fixing ash-fly ash composite environment-friendly venting grouting material consists of Slag, fly ash, curing agent, early strength agent, water reducer, defoamer, expansion agent and water. In terms of performance, the present invention can realize the adjustable and controllable strength of the grouting material by adjusting the ratio of sulfur-fixing ash, fly ash and curing agent in the formula; through the content of auxiliary components and curing agent components, it can realize High early strength and short curing time. At the same time, the present invention adopts industrial solid wastes such as sulfur-fixing ash and fly ash, which meets the national development requirements for environmental protection. Compared with the cement-based grouting materials commonly used in the market at present, the grouting material of the present invention has no drying shrinkage phenomenon after curing, maintains volume expansion slightly, and has excellent resistance to drying shrinkage. The cost of grouting materials is less than 180 yuan/m ³ , the cost performance is greatly improved, and it has great economic and social benefits.

Description

A kind of sulfur-fixed ash-fly ash composite environment-friendly hollow-out grouting material and its preparation method law and application

technical field

The invention belongs to the field of materials for road engineering, bridge engineering and tunnel engineering, and in particular relates to a sulfur-fixing ash-fly ash composite environment-friendly hollow-out grouting material and its preparation method and application.

Background technique

The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art.

Different degrees of damage will appear on the road under the long-term action of traffic load and environmental factors. For the subgrade, it mainly includes deformation and sinking, hollowing out, mud turning, etc.; for the road surface, there are cracks, potholes, uneven road surface, etc. The occurrence of road diseases, on the one hand, reduces the road performance, affects its driving comfort, and may cause traffic accidents in serious cases; on the other hand, it also greatly shortens the service life of the road and affects its economic benefits. The diseases of the subgrade are generally difficult to find. If they are not treated in time, they will lead to the occurrence and deterioration of road surface diseases, and then manifest themselves in the form of road surface diseases.

At present, more and more grouting technology is used in fields such as roadbed 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 grout can meet the grouting requirements under most geological conditions. However, in terms of performance, there are disadvantages such as long initial setting time and difficult control, low early strength, high water separation rate and easy shrinkage, and difficult filling of micro cracks; in terms of cost performance, with the continuous improvement of national environmental protection requirements, cement manufacturing base Due to the shortage of materials, the production process is constantly updated, and its price has also risen sharply. For road engineering, bridge engineering, tunnel engineering and other fields where the amount of grouting material is huge, the engineering maintenance cost 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-fixed ash is an industrial solid waste produced in the fluidized bed coal combustion technology in power plants. At present, the annual discharge of coal-fired sulfur-fixed ash in the fluidized bed is about 8000W tons. As far as my country's current national conditions and energy status are concerned, coal combustion is still an important energy base in our country, so the emission of sulfur-fixed ash will remain high. At present, the emission and storage of sulfur-fixed ash and slag are large, but the utilization rate is very low. Therefore, if the sulfur-fixed ash can be applied to road construction on a large scale, it will be beneficial to environmental protection and effectively utilize 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 semi-rigid base cracks, which is composed of A (composite polyol, moisture absorbent, etc.), B component (PAPI-2 type isocyanate), and is used for repairing semi-rigid Base cracks. Patent CN109608143A discloses a rapid-setting early-strength cement-sodium silicate double-fluid grouting material and its application method, which can be applied to the advanced grouting reinforcement of the surrounding rock of the broken roof to prevent roof collapse during roadway excavation and improve the efficiency of roadway excavation. Patent CN106543688B discloses an organic/inorganic nanocomposite grouting material and its preparation method, which guarantees the safety of mine reinforcement materials by compounding nano toughening modifiers and organic polyisocyanates in the material. Patent CN109354461A discloses a high polymer composite grouting material and its preparation method, which comprehensively utilizes Wenlun rubber, polyether polyol, epoxy soybean oil and ordinary Portland cement to solve the problem of coal mined-out areas, highway mined-out areas, Road surface subsidence, subgrade subsidence, embankment water blocking and roof leakage and other engineering problems. 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 has a certain impact on the raw materials of the roadbed; or still use cement as the main matrix, and the cost performance has not dropped significantly; or although solid waste is mainly used as grouting The main components of the material have shortcomings such as poor adhesion, poor shrinkage resistance, and inflexible strength control.

Contents of the invention

Aiming at the deficiencies of the above-mentioned prior art, the present invention provides a sulfur-fixing ash-fly ash composite environment-friendly hollow-out grouting material and its preparation method and application. 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 source, the hollow grouting material of the present invention consists of Composed of sulfur-fixing ash, fly ash, curing agent and a series of additives, it makes full use of industrial solid waste such as sulfur-fixing ash and fly ash, and is the same as the cement-based grouting materials commonly used in the market at present (the cost is about 300-400 Yuan/m ³ ), the present invention makes full use of the certain pozzolanic activity of sulfur-fixing ash, and with the use of expansion agent, the volume of the grouting material can expand slightly during mixing and use, and there is no drying shrinkage after curing. Compared with the existing cement-based grout on the market, it has excellent anti-shrinkage ability. At the same time, the cost of this 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 present 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 maintenance costs. Therefore, it has good practical application value.

One of the objectives of the present invention is to provide an environment-friendly hollow-out grouting material compounded with sulfur-fixed ash-fly ash.

The second object of the present invention is to provide a method for preparing the above-mentioned sulfur-fixing ash-fly ash composite environment-friendly hollow-out grouting material.

The third object of the present invention is to provide the application of the above-mentioned sulfur-fixing ash-fly ash composite environment-friendly hollowing grouting material in the hollowing treatment of highway bridgehead lapping boards.

The present invention is achieved through the following technical solutions:

The first aspect of the present invention provides a kind of sulfur-fixed ash-fly ash composite environment-friendly hollow-out grouting material, including:

Sulfur-fixing ash, fly ash, curing agent, early strength agent, water reducer, defoamer, expansion agent, water.

As a further limitation, in terms of 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 defoamer, 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, hydrated lime, caustic soda, ordinary Portland cement and plaster, and its weight ratio is water glass: hydrated lime: caustic soda: ordinary Portland cement: plaster of paris=10～40 : 0~30: 5~25: 20~60: 30~50.

As a further limitation, the accelerator 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.

The second aspect of the present invention provides the preparation method of the above-mentioned sulfur-fixing ash-fly ash composite environment-friendly hollow grouting material, the steps are as follows:

(1) Take the sulfur-fixing ash and fly ash according to the amount, wherein the sulfur-fixing ash and fly ash are sieved; the sulfur-fixing slag is crushed, ground, and sieved; Coal ash and crushed sulfur-fixing slag are heated for anaerobic high-temperature activation; then cooled to room temperature and mixed evenly to obtain component A.

(2) Weigh the early strength agent, water reducer, defoamer, expansion agent and water according to the amount, and stir them evenly to prepare component B of the auxiliary agent.

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

(4) During construction, after mixing and stirring components A, B and C according to the weight ratio of 0.8～1.5:0.08～0.25:0.4～0.6, use grouting method to inject into the void that needs to be repaired place.

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

Compared with prior art, the beneficial effect of the present invention is:

(1) In the hollow grouting material formula and preparation process provided by the present invention, by adjusting the ratio of sulfur-fixing ash, fly ash and curing agent C component in component A, the strength of grouting material can be effectively realized Adjustable and controllable; at the same time, this grouting material makes full use of the certain pozzolanic activity of sulfur-fixing ash, and with the use of expansion agent, this grouting material forms extremely fine microbubbles inside the matrix, which makes the grouting during use The material can maintain micro-expansion in volume, and there is no drying shrinkage after curing. Compared with the existing cement-based grouting materials on the market, it has excellent resistance to drying shrinkage.

(2) Industrial solid wastes such as sulfur-fixing ash and fly ash are used in the grouting material provided by the present invention, which is cheap and has large reserves, which solves the processing problems of a large amount of industrial solid wastes faced by our country, is energy-saving and environmentally friendly, and conforms to the national Development requirements for environmental protection. Compared with the cement-based grouting materials commonly used in 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 great economic benefits and social benefits. benefit.

(3) The hollow grouting material of the present invention can realize the characteristics of high early strength and short curing time through the action of component B of auxiliary agent and component C of curing agent; 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 present invention. Unless defined otherwise, 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 here is only for describing specific embodiments, and is not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof. It should be understood that the protection scope of the present invention is not limited to the following specific implementations; it should also be understood that the terms used in the examples of the present invention are for describing specific implementations rather than limiting the protection scope of the present invention. In the following specific embodiments, if the experimental methods of specific conditions are not indicated, generally follow the conventional methods and conditions of molecular biology within the skill of the art, and such techniques and conditions are fully explained in the literature.

Existing grouting materials either need to be filled with organic substances, which will have a certain impact on roadbed raw materials; or still use cement as the main matrix, and the cost performance has not dropped significantly; or although solid waste is the main component of grouting materials, there is adhesion Poor strength and insufficient flexibility in strength control.

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

Sulfur-fixing ash, fly ash, curing agent, early strength agent, water reducer, defoamer, expansion agent, water.

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

Sulfur-fixing ash contains more anhydrous gypsum and CaO, which has hydration expansion characteristics at room temperature, and its pozzolanic activity is higher, and the reaction resistance is also smaller. 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-fly ash composite environment-friendly venting grouting material of the present invention fully exerts the activity of the sulfur-fixing ash, and forms a gradation complementation with the fly ash by using the particle size difference, and utilizes the main components The strength can be adjusted according to the difference in the content and content. The rational use of two industrial solid wastes, sulfur-fixed ash and fly ash, can effectively improve the workability of 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 includes sulfur-fixing ash and sulfur-fixing slag, wherein the sulfur-fixing ash refers to a specific surface area greater than 400m ² /kg after screening; the sulfur-fixing slag refers to the After primary crushing, grinding and sieving, the surface area ranges from 260 to 480m ² /kg.

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

In yet another 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: hydrated lime: caustic soda: ordinary Portland cement: calcined gypsum. 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 water glass, slaked lime, caustic soda, ordinary Portland cement and plaster of hardening, curing or strengthening, by adjusting the ratio with sulfur-fixing ash and fly ash , Effectively improve and adjust the strength and hardness of hollow grouting material.

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

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

In yet 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 yet 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, a method for preparing an environment-friendly hollow grouting material compounded with sulfur-fixed ash-fly ash is provided, and the steps are as follows:

(1) Take the sulfur-fixing ash and fly ash according to the amount, wherein the sulfur-fixing ash and fly ash are sieved; the sulfur-fixing slag is crushed, ground, and sieved; Coal ash and crushed sulfur-fixing slag are heated for anaerobic high-temperature activation; then cooled to room temperature and mixed evenly to obtain component A.

(2) Weigh the early strength agent, water reducer, defoamer, expansion agent and water according to the amount, and stir them evenly to prepare component B of the auxiliary agent.

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

(4) During construction, after mixing and stirring components A, B and C according to the weight ratio of 0.8～1.5:0.08～0.25:0.4～0.6, use grouting method to inject into the void that needs to be repaired place.

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

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

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

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

The specific condition of the oxygen-free high-temperature activation is: 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-fixed ash-fly ash composite environment-friendly hollowing grouting material in the hollowing treatment of highway bridge head lapping slabs is provided.

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

Example 1

A preparation method of a sulfur-fixed ash-fly ash composite environment-friendly hollow-out grouting material is as follows:

(1) Weigh 30g of sulfur-fixed ash and 40g of fly ash, and sieve them through 1mm respectively, and keep the sieved samples. Weigh 40g of the sulfur-fixing slag, preliminarily crush the sulfur-fixing slag, then grind it with a ball mill for 40 minutes, sieve it with a 2mm sieve, and obtain the sulfur-fixing slag powder with a specific surface area of 260-480m ² /kg.

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

(3) Weigh 1g of early strength agent calcium chloride, 2.5g of polycyclic aromatic salt of water reducer, 1.0g of defoamer polyether, 0.02g of expansion agent, aluminum powder and 25g of water, mechanically stir 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, and stir them evenly to obtain component C of the curing agent.

(5) During the construction process, mix and stir components A, B and C according to the weight fraction of 1:0.08:0.6, and then partly pour them into the mold to measure their 3-day compressive strength and 7-day compressive strength. Compressive strength, 28-day compressive strength, flexural strength and cure volume shrinkage ratio. Inject through the grouting pipe into the void that needs to be repaired.

Table 1 Embodiment 1 Performance Index

Example 2

A preparation method of a sulfur-fixed ash-fly ash composite environment-friendly hollow-out grouting material is as follows:

(1) Weigh 60g of sulfur-fixed ash and 30g of fly ash, sieve them through 1mm respectively, and keep the sieved samples. Weigh 60g of the sulfur-fixing slag, preliminarily crush the sulfur-fixing slag, then grind it with a ball mill for 40 minutes, sieve it with a 2mm sieve, and get the sulfur-fixing slag powder with a specific surface area of 260-480m ² /kg.

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

(3) Weigh 2g of early strength agent sodium chloride, 2g of water reducing agent polycarboxylic acid, 3.0g of defoaming agent organosilicon, 0.01g of expansion agent calcium sulfoaluminate and 40g of water, stir mechanically to obtain 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, and stir them evenly to obtain component C of the curing agent.

(5) During the construction process, after mixing and stirring components A, B and C according to the weight fraction of 1.5:0.15:0.4, part of them was poured into the mold, and the 3-day compressive strength and 7-day compressive strength were measured. Compressive strength, 28-day compressive strength, flexural strength and cure volume shrinkage ratio. Inject through the grouting pipe into the void that needs to be repaired.

Table 2 embodiment 2 performance index

Example 3

A preparation method of a sulfur-fixed ash-fly ash composite environment-friendly hollow-out grouting material is as follows:

(1) Weigh 80g of sulfur-fixed ash and 40g of fly ash, and sieve them at 2mm respectively, and keep the sieved samples. Weigh 80g of the sulfur-fixing slag, preliminarily crush the sulfur-fixing slag, then grind it with a ball mill for 20 minutes, and sieve it with a 1mm sieve to get the sulfur-fixing slag powder with a specific surface area of 260-480m ² /kg.

(2) Place the above sample in an oxygen-free high-temperature furnace at 500° C. and heat for 5 hours to perform high-temperature activation. Then cool to room temperature, stir and mix evenly to obtain component A.

(3) Weigh 4g of early strength agent aluminum chloride, 6g of water reducer lignosulfonate, 4.0g of defoamer fatty alcohol, 0.03g of expansion agent aluminum powder and 60g of water, and stir them evenly to obtain 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, and stir them evenly to obtain component C of the curing agent.

(5) During the construction process, after mixing and stirring components A, B and C according to the weight fraction of 0.8:0.25:0.6, part of them was poured into the mold, and the 3-day compressive strength and 7-day compressive strength were measured. Compressive strength, 28-day compressive strength, flexural strength and cure volume shrinkage ratio. Inject through the grouting pipe into the void that needs to be repaired.

Table 3 embodiment 3 performance index

Comparative example 1

A sulfur-fixing ash-fly ash composite environment-friendly venting grouting material, the preparation method of which is the same as that of Example 1, and the only difference from Example 1 is that no sulfur-fixing ash is added.

Comparative example 2

A sulfur-fixed ash-fly ash composite environment-friendly venting grouting material, the preparation method of which is the same as that of Example 1, and the only difference from Example 1 is that no expansion agent is added.

Comparative example 3

A sulfur-fixing ash-fly ash composite environment-friendly venting grouting material, the preparation method of which is the same as that of Example 1, the only difference from Example 1 is that water glass, hydrated lime and caustic soda are not added.

The properties of the empty grouting binder obtained in Comparative Examples 1-3 are shown in Table 4.

Table 4

performance unit Comparative example 1 value Comparative example 2 numerical value Comparative example 3 numerical value 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 plastic shrinkage of the grouting material will be serious if the expansion agent is not used, and the volume shrinkage will be large after curing. The pozzolanic activity of sulfur-fixed ash plays a synergistic effect, making the grouting material have excellent volume shrinkage resistance; at the same time, the strength of the grouting material is also greatly reduced without using water glass, slaked lime and caustic soda. 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 solution of the present invention rather than limit it. 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 (10)

1. A sulfur-fixed ash-fly ash composite environment-friendly hollow-out grouting material, characterized in that it includes: Sulfur-fixing ash, fly ash, curing agent, early strength agent, water reducer, defoamer, expansion agent and water. 2. A kind of sulfur-fixing ash-fly ash composite environment-friendly venting grouting material as claimed in claim 1, characterized in that: in parts by mass, it comprises: 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, 1-4 parts of defoamer, 0.01-0.03 parts of expansion agent, 25-60 parts of water share. 3. A kind of sulfur-fixing ash-fly ash composite environment-friendly venting grouting material as claimed in claim 1, characterized in that: the sulfur-fixing ash comprises sulfur-fixing ash and sulfur-fixing slag, wherein solid After the sulfur ash is sieved, the specific surface area range is greater than 400m ² /kg; after the sulfur-fixing slag is preliminarily crushed, ground, and sieved, the surface area ranges from 260 to 480m ² /kg; After the fly ash is sieved, the specific surface area range is greater than 400m ² /kg. 4. A kind of sulfur-fixed ash-fly ash composite environment-friendly hollow grouting material as claimed in claim 1, characterized in that: the curing agent is composed of water glass, hydrated lime, caustic soda, ordinary portland cement and plaster of paris; Preferably, in terms of weight ratio, water glass: slaked lime: caustic soda: ordinary Portland cement: plaster of paris = 10-40: 0-30: 5-25: 20-60: 30-50. 5. A kind of sulfur-fixing ash-fly ash composite environment-friendly venting grouting material as claimed in claim 1, characterized in that: the early strength agent is calcium chloride, sodium chloride, aluminum chloride , a mixture of one or more of lithium chloride. 6. A kind of sulfur-fixing ash-fly ash composite environment-friendly hollow grouting material as claimed in claim 1, characterized in that: the water reducing agent is lignosulfonate, naphthalenesulfonate formaldehyde polymer , a polycyclic aromatic salt or a mixture of one or more of polycarboxylic acids. 7. A kind of sulfur-fixed ash-fly ash composite environment-friendly venting grouting material as claimed in claim 1, characterized in that: the defoaming agent includes mineral oil, polyether, organosilicon or fat A mixture of one or more alcohols. 8. A kind of sulfur-fixing ash-fly ash composite environment-friendly venting grouting material as claimed in claim 1, characterized in that: the expansion agent includes calcium sulfoaluminate, calcium oxide-calcium sulfoaluminate , calcium oxide or aluminum powder in one or more of the mixture. 9. The method for preparing the sulfur-fixing ash-fly ash composite environment-friendly hollow grouting material according to any one of claims 1-8, characterized in that it comprises: (1) Take the sulfur-fixing ash and fly ash according to the amount, wherein the sulfur-fixing ash and fly ash are sieved; the sulfur-fixing slag is crushed, ground, and sieved; Coal ash and crushed sulfur-fixing slag are heated for anaerobic high-temperature activation; then cooled to room temperature and mixed evenly to obtain component A; (2) Weigh the early strength agent, water reducer, defoamer, expansion agent and water according to the amount, and mechanically stir evenly to prepare the auxiliary agent B component; (3) Take water glass, slaked lime, caustic soda, ordinary Portland cement and plaster of paris by weighing, stir evenly, make curing agent C component; (4) During the construction process, mix components A, B, and C according to the weight ratio of 1:0:08~0.25:0.4~0.6, and then inject them into the detached parts that need to be repaired by grouting. empty space The steps (1), (2) and (3) are in no particular order; Preferably, in the step (1), The sulfur-fixing ash and fly ash are sieved at 1 mm to 3 mm, and the specific surface area of the sulfur-fixing ash and fly ash is >400 m ² /kg; The specific method of crushing, grinding and screening the sulfur-fixing slag is as follows: first crush the sulfur-fixing slag, then grind for 20-40 minutes, and take the sulfur-fixing slag powder with a specific surface area of 260-480m ² /kg after sieving; The specific conditions for the oxygen-free high-temperature activation are: heating at 500-600° C. for 3-5 hours. 10. The application of the sulfur-fixed ash-fly ash composite environment-friendly hollowing grouting material described in any one of claims 1-8 in the hollowing treatment of highway bridge head lapping slabs.