CN115417649B - High-durability self-repairing inorganic material for reinforcement and repair and using method - Google Patents
High-durability self-repairing inorganic material for reinforcement and repair and using method Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
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- C04B40/0039—Premixtures of ingredients
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/426—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for plugging
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention relates to the technical fields of civil engineering, coal mines and tunnel engineering, in particular to a high-durability self-repairing inorganic material for reinforcement and repair and a use method thereof. Wherein, the method comprises four varieties of flash early strength type, quick hardening super early strength type and quick hardening high strength type; the four varieties are all composed of a material A and a material B. According to the invention, the balance of the relation among the setting time, the strength exertion at each age and the hydration progress of the material is realized by matching the sulphoaluminate cement and the sulphoaluminate clinker powder, controlling the grade of calcium hydroxide and adjusting the proportion of other materials, and the nano calcium carbonate is introduced to promote hydration and stabilize the crystal form of hydrated minerals, so that the durability of the material is improved by matching with the crack self-repairing agent aiming at the sulphoaluminate cement system, and the material has the characteristics of adjustable performance, self-repairing and high durability.
Description
Technical Field
The invention relates to the technical fields of civil engineering, coal mines and tunnel engineering, in particular to a high-durability self-repairing inorganic material with adjustable performance for reinforcement and repair.
Background
Grouting reinforcement and repair materials are widely applied to civil engineering such as construction, coal mining, tunnel excavation and the like. On the one hand, under certain special conditions, the engineering needs to be quickly repaired and reinforced, such as airport roads and the like, and the use requirements need to be met as soon as possible; in the tunnel excavation process, special stratum is encountered, and natural disasters such as water burst, sand burst and the like occur, so that grouting reinforcement and plugging are required to be performed rapidly. On the other hand, in the coal mining process, grouting reinforcement is required for coal roadways, coal face and the like. The polyurethane polymer grouting material commonly used in the coal mine industry has the problems of high reaction temperature, easy ignition, toxicity, corrosiveness, easy foaming when meeting water, high price and the like.
In the prior art, most of reinforcing materials for rapid repair and grouting are the following two double-liquid systems: silicate cement + water glass systems and sulphoaluminate cement systems, but these two systems have the following problems:
problems with the Portland Cement+Water glass System
(1) The early strength of the silicate cement and water glass system is lower, the compressive strength of 1h is about 3-5 MPa, and the early strength requirement under special conditions can not be met.
(2) The water glass contains a large amount of Na ions, and is easy to cause the problems of volume expansion of hardened slurry and environmental pollution caused by alkali return caused by alkali aggregate reaction.
Problems with (di) sulphoaluminate cement systems
In the existing sulphoaluminate cement system, although the hydration reaction is fast, the relationship among the coagulation time, the strength exertion of each age and the material hydration process cannot be effectively balanced, so that the problems of microcrack generation and strength collapse are caused, and the concrete steps are as follows:
(1) The main product of hydration is ettringite, but the formation of ettringite crystals causes the volume expansion of the ettringite crystals to be 120 percent, and the ettringite crystals are continuously generated in the hardened slurry, so that the inside of the hardened slurry is subjected to larger crystallization stress, microcracks are generated, and the problems of later-stage strength shrinkage and volume durability of a sulphoaluminate cement system are caused because the sulphoaluminate cement system does not have a crack repairing function.
(2) During the reaction, a large amount of ettringite is generated, but the ettringite is easily influenced by conditions such as ambient temperature, so that the crystal form of the ettringite is converted into monosulfur hydrated calcium sulfoaluminate, and the problem of strength collapse is further caused.
(3) Sulphoaluminate cements are a low alkalinity cement series, and cannot provide higher alkalinity for exciting alumino-silicate materials, resulting in insufficient strength growth dynamics at the later stage.
(4) The existing sulphoaluminate cement has single double-liquid system performance, and cannot balance the relationship among the setting time, the early, middle and late strength exertion and the material hydration process, so that the construction requirements of different projects cannot be met.
Therefore, developing an inorganic material with adjustable performance, self-repairing and high durability for reinforcement and repair is one of the technical difficulties in the art.
Disclosure of Invention
The invention provides a high-durability self-repairing inorganic material for reinforcement and repair and a use method thereof, aiming at solving the problems of engineering durability and environmental pollution caused by alkali aggregate reaction and alkali return caused by low early strength and high alkali content of the existing silicate cement and water glass system and the problems of single durability and performance of ettringite in a sulphoaluminate cement system, such as unstable crystal form, insufficient later strength and the like.
The invention controls the relationship balance among the setting time, the early, middle and late strength exertion and the hydration process of the material by creatively designing the proportion of the double-liquid-system raw materials of the sulphoaluminate cement and selecting the raw materials, and can divide the material system of the invention into: (1) flash early strength; (2) quick setting early strength; (3) quick setting super early strength; (4) The rapid setting is high in strength, 4 series varieties are provided, so that the rapid setting has the characteristics of adjustable setting time, high early-stage and later-stage strength, stable crystal form of hydrated mineral ettringite, self-repairing of cracks and high durability, and can be used for grouting reinforcement and rapid repair engineering.
In order to solve the technical problems, the application provides the following technical scheme:
a high-durability self-repairing inorganic material for reinforcement and repair comprises four varieties of flash early strength type, quick hardening super early strength type and quick hardening high strength type; the four varieties are composed of a material A and a material B;
the mass percentages of the raw materials of each variety are specifically as follows:
(1) Flash early strength type
And (3) material A: 70 to 80 percent of 72.5-grade sulphoaluminate clinker powder, 19.5 to 29.5 percent of 52.5-grade sulphoaluminate cement, 0.4 to 0.6 percent of water reducer and 0.1 to 0.2 percent of boric acid;
and (2) material B: 15-20% of gypsum powder, 30-35% of industrial high-grade calcium hydroxide powder, 30-35% of blast furnace slag powder, 10-15% of steel slag powder, 3-5% of nano-grade calcium carbonate, 1-1.5% of crack self-repairing agent, 2-3% of sodium sulfate and 0.6-0.8% of water reducer;
(2) Quick setting early strength type
And (3) material A: 29 to 35 percent of 72.5-grade sulphoaluminate clinker powder, 64 to 70 percent of 52.5-grade sulphoaluminate cement, 0.4 to 0.6 percent of water reducer and 0.3 to 0.4 percent of boric acid;
and (2) material B: 15 to 17 percent of gypsum powder, 22 to 24 percent of industrial low-grade calcium hydroxide powder, 35 to 38 percent of blast furnace slag powder, 15 to 18 percent of steel slag powder, 3 to 5 percent of nano-grade calcium carbonate, 1 to 1.5 percent of crack self-repairing agent and 0.6 to 0.8 percent of water reducer;
(3) Quick setting super early strength type
And (3) material A: 15 to 17 percent of 72.5-grade sulphoaluminate clinker powder, 82 to 84 percent of 52.5-grade sulphoaluminate cement, 0.4 to 0.6 percent of water reducer and 0.3 to 0.4 percent of boric acid;
and (2) material B: 15 to 17 percent of gypsum powder, 22 to 24 percent of industrial high-grade calcium hydroxide powder, 37 to 40 percent of blast furnace slag powder, 12 to 15 percent of steel slag powder, 3 to 5 percent of nano-grade calcium carbonate, 1 to 1.5 percent of crack self-repairing agent, 2 to 3 percent of sodium sulfate and 0.6 to 0.8 percent of water reducer;
(4) Quick-setting high-strength type
And (3) material A: 99 to 99.3 percent of 52.5-grade sulphoaluminate cement, 0.4 to 0.6 percent of water reducer and 0.3 to 0.4 percent of boric acid;
and (2) material B: 15 to 17 percent of gypsum powder, 22 to 24 percent of industrial low-grade calcium hydroxide powder, 37 to 40 percent of blast furnace slag powder, 15 to 18 percent of steel slag powder, 3 to 5 percent of nano-grade calcium carbonate, 1 to 1.5 percent of crack self-repairing agent and 0.6 to 0.8 percent of water reducer.
Wherein the crack self-repairing agentThe calcium silicate comprises the following raw materials in percentage by mass. The prepared self-repairing agent for cracks is suitable for a sulphoaluminate cement hydration system and can be used for mixing Ca in cracks of hardening materials 2+ The dendrite fiber crystals which are insoluble in water are generated, a compact area is gradually formed in the cracks, and the cracks generated by rapid hydration and ettringite expansion of the materials can be repaired, so that the later collapse of the strength of the materials is avoided.
Wherein the 72.5-grade sulphoaluminate clinker powder is prepared by grinding 72.5-grade sulphoaluminate plastics, and the specific surface area is more than or equal to 450m 2 /kg; the specific surface area of the 52.5-grade sulphoaluminate cement is more than or equal to 400m 2 /kg。
Wherein, the boric acid is retarder, the content of which is more than or equal to 95 percent, and is powdery and used for controlling the hydration process.
The water reducer is a powdery polycarboxylic acid high-efficiency water reducer.
The gypsum powder is dihydrate gypsum CaSO 4 ·2H 2 O or anhydrite (CaSO) 4 ) Is prepared by grinding, and the specific surface area is more than or equal to 400m 2 And/kg, controlling the hydration process of the material.
Wherein the industrial high-grade calcium hydroxide powder is produced industrially, the content of calcium is 90-95%, and the specific surface area is more than or equal to 500m 2 And (3) kg, increasing the alkalinity of the material system, and simultaneously controlling the hydration process of the material.
The industrial low-grade calcium hydroxide powder is produced industrially, the content of calcium is 40-50%, and the specific surface area is more than or equal to 500m 2 And (3) kg, increasing the alkalinity of the material system, and simultaneously controlling the hydration process of the material.
Wherein the blast furnace slag powder is prepared by punching by a Inkpad method and grinding, and the specific surface area is more than or equal to 400m 2 The 7d activity index of the catalyst is more than or equal to 80 percent, and the 28d activity index of the catalyst is more than or equal to 105 percent. The sulphoaluminate cement series is low-alkalinity cement, and slag powder cannot be effectively excited, but under the condition that the alkalinity is improved by calcium hydroxide, the activity of slag can be excited in the later stage, and the later-stage strength of the material is supplemented.
Wherein the steel slag powder is processed by hot-closed or air-quenched converter slag, and is ground until the specific surface area is more than or equal to 400m 2 And the 7d activity index is more than or equal to 65 percent, and the 28d activity index is more than or equal to 75 percent, so that the viscosity of the material and the later alkalinity of the material are improved.
Wherein, the sodium sulfate Na 2 SO 4 The content of the coagulant is more than 90 percent.
Wherein, the nano-grade calcium carbonate is prepared by a precipitation method or a carbonation method, the content of the calcium carbonate is more than or equal to 95 percent, and the crystal granularity of the calcium carbonate is less than or equal to 1 mu m. The nano calcium carbonate has small crystal, can be used as a 'nucleation' core of a hydration product, and promotes hydration of sulfoaluminate cement minerals in the material A; meanwhile, the calcium aluminate can react with aluminum hydration products (C-A-H) in the material to generate hydrated calcium carbonate, the effect of the hydrated calcium carbonate can inhibit the transformation of ettringite to mono-sulfur hydrated calcium sulfoaluminate, the purpose of stabilizing ettringite mineral crystal forms is achieved, and the later stage collapse of the material strength is avoided.
The application method of the high-durability self-repairing inorganic material comprises the following steps: the material A and the material B are respectively added with water according to the water-cement ratio of 0.3-0.33 to prepare slurry, and the mass ratio of the two slurries is 1:1, carrying out matched use; and when the material is cured, moisture curing is adopted.
Wherein, the material A and the material B are independently prepared into slurry, the independent slurry coagulation time is more than or equal to 60min, the following table is the performance index of each type, and the compressive strength data of 90d and 270d are introduced to represent the durability of the material, and the material A and the material B can be selectively applied according to different engineering requirements.
Remarks: the expansion rate of the materials is 0.1-0.3%.
Compared with the prior art, the high-durability self-repairing inorganic material for reinforcement and repair and the use method thereof have at least the following beneficial effects:
(1) The invention realizes the balance of the relationship among the setting time, the early, middle and later strength exertion and the material hydration process through the collocation of the sulphoaluminate cement and the sulphoaluminate clinker powder, the control of the calcium hydroxide grade and the proportioning adjustment of other materials. Compared with the traditional double-component material, the double-component material has the characteristics of adjustable setting time, early-stage strength and later-stage strength, has obvious performance advantages, can be divided into 4 types according to different engineering requirements, and solves the problem that the performance of a single system is difficult to meet the different engineering requirements.
(2) Compared with the traditional silicate cement and water glass system, the material of the invention has no large amount of Na ions, and solves the problems of engineering safety and durability caused by alkali aggregate reaction generated by Na ions in water glass and environmental pollution caused by alkali return.
(3) Compared with the existing sulphoaluminate cement system, the nano calcium carbonate added in the material can react to generate hydrated calcium carbonate aluminate, stabilize the crystal form of ettringite, avoid the influence of conditions such as environment and the like, and convert the calcium carbonate into mono-sulfur hydrated calcium sulphoaluminate, thereby avoiding later-stage strength scaling.
(4) Compared with the existing sulphoaluminate cement system, the material provided by the invention is added with the designed crack repairing agent, and is used for repairing ettringite generated by rapid reaction of the sulphoaluminate cement double-liquid system, 120% of volume expansion is generated, microcracks generated in the hardened material are caused, and the durability problem caused by later-stage strength collapse of the material is avoided.
(5) Compared with the existing sulphoaluminate cement system, the material disclosed by the invention has the advantages that the hydration process and the performance of the material are controlled by adding different grades of industrial-grade calcium hydroxide into the material B, meanwhile, the alkalinity of the material system is improved, the hydration activity of slag powder is stimulated, and the later strength and the durability of the material are improved.
The high durability self-healing inorganic material for reinforcement and healing and the method of use of the present invention are further described below.
Detailed Description
A high-durability self-repairing inorganic material for reinforcement and repair consists of a material A and a material B, and can be divided into: (1) flash early strength type; (2) quick setting early strength type; (3) quick setting super early strength; (4) The quick setting high strength type material comprises 4 series of varieties, and the mass percentages of raw materials of all the material varieties are as follows:
(1) Flash early strength type
And (3) material A: 70 to 80 percent of 72.5-grade sulphoaluminate clinker powder, 19.5 to 29.5 percent of 52.5-grade sulphoaluminate cement, 0.4 to 0.6 percent of water reducer and 0.1 to 0.2 percent of boric acid;
and (2) material B: 15-20% of gypsum powder, 30-35% of industrial high-grade calcium hydroxide powder, 30-35% of blast furnace slag powder, 10-15% of steel slag powder, 3-5% of nano-grade calcium carbonate, 1-1.5% of crack self-repairing agent, 2-3% of sodium sulfate and 0.6-0.8% of water reducer;
(2) Quick setting early strength type
And (3) material A: 29 to 35 percent of 72.5-grade sulphoaluminate clinker powder, 64 to 70 percent of 52.5-grade sulphoaluminate cement, 0.4 to 0.6 percent of water reducer and 0.3 to 0.4 percent of boric acid;
and (2) material B: 15 to 17 percent of gypsum powder, 22 to 24 percent of industrial low-grade calcium hydroxide powder, 35 to 38 percent of blast furnace slag powder, 15 to 18 percent of steel slag powder, 3 to 5 percent of nano-grade calcium carbonate, 1 to 1.5 percent of crack self-repairing agent and 0.6 to 0.8 percent of water reducer;
(3) Quick setting super early strength type
And (3) material A: 15 to 17 percent of 72.5-grade sulphoaluminate clinker powder, 82 to 84 percent of 52.5-grade sulphoaluminate cement, 0.4 to 0.6 percent of water reducer and 0.3 to 0.4 percent of boric acid;
and (2) material B: 15 to 17 percent of gypsum powder, 22 to 24 percent of industrial high-grade calcium hydroxide powder, 37 to 40 percent of blast furnace slag powder, 12 to 15 percent of steel slag powder, 3 to 5 percent of nano-grade calcium carbonate, 1 to 1.5 percent of crack self-repairing agent, 2 to 3 percent of sodium sulfate and 0.6 to 0.8 percent of water reducer;
(4) Quick-setting high-strength type
And (3) material A: 99 to 99.3 percent of 52.5-grade sulphoaluminate cement, 0.4 to 0.6 percent of water reducer and 0.3 to 0.4 percent of boric acid;
and (2) material B: 15 to 17 percent of gypsum powder, 22 to 24 percent of industrial low-grade calcium hydroxide powder, 37 to 40 percent of blast furnace slag powder, 15 to 18 percent of steel slag powder, 3 to 5 percent of nano-grade calcium carbonate, 1 to 1.5 percent of crack self-repairing agent and 0.6 to 0.8 percent of water reducer.
The crack self-repairing agent is prepared from the following raw materials in percentage by mass, 8% of methyl sodium silicate, 17% of light calcium powder, 10% of instant sodium silicate, 20% of magnesium potassium silicate, 25% of sodium fluosilicate and 20% of calcium chloride.
The 72.5-grade sulphoaluminate clinker powder is prepared by grinding 72.5-grade sulphoaluminate plastics, and the specific surface area is more than or equal to 450m 2 /kg; the specific surface area of the 52.5-grade sulphoaluminate cement is more than or equal to 400m 2 /kg。
Boric acid is retarder, the content of which is more than or equal to 95 percent and is powdery.
The water reducer is powdery polycarboxylic acid high-efficiency water reducer.
The gypsum powder is dihydrate gypsum CaSO 4 ·2H 2 O or anhydrite (CaSO) 4 ) Is prepared by grinding, and the specific surface area is more than or equal to 400m 2 /kg。
The industrial high-grade calcium hydroxide powder is produced industrially, the content of calcium is 90-95%, and the specific surface area is more than or equal to 500m 2 /kg。
The industrial low-grade calcium hydroxide powder is produced industrially, the content of calcium is 40-50%, and the specific surface area is more than or equal to 500m 2 /kg。
The blast furnace slag powder is prepared by punching with a Inkpad method and grinding, and the specific surface area is more than or equal to 400m 2 The 7d activity index of the catalyst is more than or equal to 80 percent, and the 28d activity index of the catalyst is more than or equal to 105 percent.
The steel slag powder is processed by hot disintegrating or wind quenching converter slag, and is ground to a specific surface area of more than or equal to 400m 2 The 7d activity index of the catalyst is more than or equal to 65 percent, and the 28d activity index of the catalyst is more than or equal to 75 percent.
Sodium sulfate Na 2 SO 4 The content reaches more than 90 percent.
The nano-grade calcium carbonate is prepared by a precipitation method or a carbonation method, the content of the calcium carbonate is more than or equal to 95 percent, and the crystal granularity of the calcium carbonate is less than or equal to 1 mu m.
When in use, the material A and the material B are added with water according to the water-cement ratio of 0.3-0.33 to prepare slurry, and the mass ratio of the material A to the material B is 1:1, when the material is cured, moisture curing is needed.
The following specific examples are exemplified for the 4 series of varieties described above.
(1) Specific examples of flash early strength varieties
Example 1-1
The high-durability self-repairing inorganic material (flash early strength) for reinforcement and repair comprises the following raw materials in percentage by mass:
and (3) material A: 80% of 72.5-grade sulphoaluminate clinker powder, 19.3% of 52.5-grade sulphoaluminate cement, 0.6% of water reducer and 0.1% of boric acid;
and (2) material B: 15% of gypsum powder, 30% of industrial high-grade calcium hydroxide powder, 35.2% of blast furnace slag powder, 10.5% of steel slag powder, 5% of nano-grade calcium carbonate, 1.5% of crack self-repairing agent, 2% of sodium sulfate and 0.8% of water reducer.
The water to ash ratio for both the A and B applications in example 1-1 was 0.3, and the material was designated SHNZQ-1 as used with a 1:1 mass ratio of A to B.
Examples 1 to 2
The high-durability self-repairing inorganic material (flash early strength) for reinforcement and repair comprises the following raw materials in percentage by mass:
and (3) material A: 78% of 72.5-grade sulphoaluminate clinker powder, 21.4% of 52.5-grade sulphoaluminate cement, 0.5% of water reducer and 0.1% of boric acid;
and (2) material B: 15% of gypsum powder, 30% of industrial high-grade calcium hydroxide powder, 35.2% of blast furnace slag powder, 10.6% of steel slag powder, 5% of nano-grade calcium carbonate, 1.5% of crack self-repairing agent, 2% of sodium sulfate and 0.7% of water reducer.
The water to ash ratio for both batch A and batch B of examples 1-2 was 0.3, and the material was designated SHNZQ-2, used at a 1:1 mass ratio of batch A to batch B.
Examples 1 to 3
The high-durability self-repairing inorganic material (flash early strength) for reinforcement and repair comprises the following raw materials in percentage by mass:
and (3) material A: 76% of 72.5-grade sulphoaluminate clinker powder, 23.4% of 52.5-grade sulphoaluminate cement, 0.4% of water reducer and 0.2% of boric acid;
and (2) material B: 17% of gypsum powder, 30% of industrial high-grade calcium hydroxide powder, 32.4% of blast furnace slag powder, 10.5% of steel slag powder, 5% of nano-grade calcium carbonate, 1.5% of crack self-repairing agent, 3% of sodium sulfate and 0.6% of water reducer.
The water to ash ratio for both batch A and batch B of examples 1-3 was 0.33, and the material was designated SHNZQ-3, used at a 1:1 mass ratio of batch A to batch B.
Example 4
The high-durability self-repairing inorganic material (flash early strength) for reinforcement and repair comprises the following raw materials in percentage by mass:
and (3) material A: 75% of 72.5-grade sulphoaluminate clinker powder, 24.4% of 52.5-grade sulphoaluminate cement, 0.4% of water reducer and 0.2% of boric acid;
and (2) material B: 17% of gypsum powder, 30% of industrial high-grade calcium hydroxide powder, 32.4% of blast furnace slag powder, 10.5% of steel slag powder, 5% of nano-grade calcium carbonate, 1.5% of crack self-repairing agent, 3% of sodium sulfate and 0.6% of water reducer.
The water to ash ratio for both batch A and batch B of examples 1-4 was 0.33, and the material was designated SHNZQ-4, used at a 1:1 mass ratio of batch A to batch B.
(2) Specific examples of quick setting early strength varieties
Example 2-1
The high-durability self-repairing inorganic material (quick setting early strength type) for reinforcement and repair comprises the following raw materials in percentage by mass:
and (3) material A: 29% of 72.5-grade sulphoaluminate clinker powder, 70% of 52.5-grade sulphoaluminate cement, 0.6% of water reducer and 0.4% of boric acid;
and (2) material B: 15% of gypsum powder, 24% of industrial low-grade calcium hydroxide powder, 38% of blast furnace slag powder, 15.7% of steel slag powder, 5% of nano-scale calcium carbonate, 1.5% of crack self-repairing agent and 0.8% of water reducer.
The water to ash ratio for both batch A and batch B of example 2-1 was 0.3, and the material was designated SUNZQ-1, used at a 1:1 mass ratio of batch A to batch B.
Example 2-2
The high-durability self-repairing inorganic material (quick setting early strength type) for reinforcement and repair comprises the following raw materials in percentage by mass:
and (3) material A: 31% of 72.5-grade sulphoaluminate clinker powder, 68.1% of 52.5-grade sulphoaluminate cement, 0.5% of water reducer and 0.4% of boric acid;
and (2) material B: 15% of gypsum powder, 24% of industrial low-grade calcium hydroxide powder, 38% of blast furnace slag powder, 15.8% of steel slag powder, 5% of nano-scale calcium carbonate, 1.5% of crack self-repairing agent and 0.7% of water reducer.
The water to ash ratio for both batch A and batch B of examples 2-2 was 0.3, and the material was designated SUNZQ-2, used at a 1:1 mass ratio of batch A to batch B.
Examples 2 to 3
The high-durability self-repairing inorganic material (quick setting early strength type) for reinforcement and repair comprises the following raw materials in percentage by mass:
and (3) material A: 33% of 72.5-grade sulphoaluminate clinker powder, 66.3% of 52.5-grade sulphoaluminate cement, 0.4% of water reducer and 0.3% of boric acid;
and (2) material B: 15% of gypsum powder, 24% of industrial low-grade calcium hydroxide powder, 38.2% of blast furnace slag powder, 15.7% of steel slag powder, 5% of nano-grade calcium carbonate, 1.5% of crack self-repairing agent and 0.6% of water reducer.
The water to ash ratio for both batch A and batch B of examples 2-3 was 0.33, and the material was designated SUNZQ-3, used at a 1:1 mass ratio of batch A to batch B.
Examples 2 to 4
The high-durability self-repairing inorganic material (quick setting early strength type) for reinforcement and repair comprises the following raw materials in percentage by mass:
and (3) material A: 35% of 72.5-grade sulphoaluminate clinker powder, 64.3% of 52.5-grade sulphoaluminate cement, 0.4% of water reducer and 0.3% of boric acid;
and (2) material B: 15% of gypsum powder, 24% of industrial low-grade calcium hydroxide powder, 38.0% of blast furnace slag powder, 15.9% of steel slag powder, 5% of nano-grade calcium carbonate, 1.5% of crack self-repairing agent and 0.6% of water reducer.
The water to ash ratio for both batch A and batch B of examples 2-4 was 0.33, and the material was labeled SUNZQ-4, used at a 1:1 mass ratio of batch A to batch B.
(3) Specific examples of quick setting super early strength varieties
Example 3-1
The high-durability self-repairing inorganic material (quick-setting super-early-strength type) for reinforcement and repair comprises the following raw materials in percentage by mass:
and (3) material A: 15% of 72.5-grade sulphoaluminate clinker powder, 84% of 52.5-grade sulphoaluminate cement, 0.6% of water reducer and 0.4% of boric acid;
and (2) material B: 15% of gypsum powder, 24% of industrial low-grade calcium hydroxide powder, 39% of blast furnace slag powder, 12.7% of steel slag powder, 5% of nano-grade calcium carbonate, 1.5% of crack self-repairing agent, 2% of sodium sulfate and 0.8% of water reducer.
The water to ash ratio for both batch A and batch B of example 3-1 was 0.3, and the material was designated SNCZQ-1 as used with a 1:1 mass ratio of batch A to batch B.
Example 3-2
The high-durability self-repairing inorganic material (quick-setting super-early-strength type) for reinforcement and repair comprises the following raw materials in percentage by mass:
and (3) material A: 16% of 72.5-grade sulphoaluminate clinker powder, 83.1% of 52.5-grade sulphoaluminate cement, 0.5% of water reducer and 0.4% of boric acid;
and (2) material B: 15% of gypsum powder, 24% of industrial low-grade calcium hydroxide powder, 39% of blast furnace slag powder, 12.8% of steel slag powder, 5% of nano-grade calcium carbonate, 1.5% of crack self-repairing agent, 2% of sodium sulfate and 0.7% of water reducer.
The water to ash ratio for both batch A and batch B of example 3-2 was 0.3, and the material was labeled SNCZQ-2, used at a 1:1 mass ratio of batch A to batch B.
Examples 3 to 3
The high-durability self-repairing inorganic material (quick-setting super-early-strength type) for reinforcement and repair comprises the following raw materials in percentage by mass:
and (3) material A: 16.5 percent of 72.5-grade sulphoaluminate clinker powder, 82.7 percent of 52.5-grade sulphoaluminate cement, 0.4 percent of water reducer and 0.4 percent of boric acid;
and (2) material B: 15% of gypsum powder, 24% of industrial low-grade calcium hydroxide powder, 39% of blast furnace slag powder, 12.9% of steel slag powder, 5% of nano-grade calcium carbonate, 1.5% of crack self-repairing agent, 2% of sodium sulfate and 0.6% of water reducer.
The water to ash ratio for both batch A and batch B of example 3 was 0.33, and the material was designated SNCZQ-3, used at a 1:1 mass ratio of batch A to batch B.
Examples 3 to 4
The high-durability self-repairing inorganic material (quick-setting super-early-strength type) for reinforcement and repair comprises the following raw materials in percentage by mass:
and (3) material A: 17% of 72.5-grade sulphoaluminate clinker powder, 82.2% of 52.5-grade sulphoaluminate cement, 0.4% of water reducer and 0.4% of boric acid;
and (2) material B: 15% of gypsum powder, 24% of industrial low-grade calcium hydroxide powder, 39% of blast furnace slag powder, 12.9% of steel slag powder, 5% of nano-grade calcium carbonate, 1.5% of crack self-repairing agent, 2% of sodium sulfate and 0.6% of water reducer.
The water to ash ratio for both batch A and batch B of examples 3-4 was 0.33, and the material was labeled SNCZQ-4, used at a 1:1 mass ratio of batch A to batch B.
(4) Specific examples of quick setting high-strength varieties
Example 4-1
The high-durability self-repairing inorganic material (quick-setting high-strength) for reinforcement and repair comprises the following raw materials in percentage by mass:
and (3) material A: 99.0% of 52.5-grade sulphoaluminate cement, 0.6% of water reducer and 0.4% of boric acid;
and (2) material B: 15% of gypsum powder, 24% of industrial low-grade calcium hydroxide powder, 40.2% of blast furnace slag powder, 16% of steel slag powder, 3% of nano-scale calcium carbonate, 1.0% of crack self-repairing agent and 0.8% of water reducer.
The water to ash ratio for both the A and B applications in example 4-1 was 0.3, and the material was used in a 1:1 mass ratio of A to B, and was designated KNGQ-1.
Example 4-2
The high-durability self-repairing inorganic material (quick-setting high-strength) for reinforcement and repair comprises the following raw materials in percentage by mass:
and (3) material A: 99.1% of 52.5-grade sulphoaluminate cement, 0.5% of water reducer and 0.4% of boric acid;
and (2) material B: 16% of gypsum powder, 23% of industrial low-grade calcium hydroxide powder, 40.3% of blast furnace slag powder, 16% of steel slag powder, 3% of nano-grade calcium carbonate, 1.0% of crack self-repairing agent and 0.7% of water reducer.
The water to ash ratio for both the A and B applications in example 4-2 was 0.3, and the material was used at a 1:1 mass ratio of A to B, and was designated KNGQ-2.
Examples 4 to 3
The high-durability self-repairing inorganic material (quick-setting high-strength) for reinforcement and repair comprises the following raw materials in percentage by mass:
and (3) material A: 99.2% of 52.5-grade sulphoaluminate cement, 0.4% of water reducer and 0.4% of boric acid;
and (2) material B: 17% of gypsum powder, 23% of industrial low-grade calcium hydroxide powder, 39.4% of blast furnace slag powder, 16% of steel slag powder, 3% of nano-grade calcium carbonate, 1.0% of crack self-repairing agent and 0.6% of water reducer.
The water to ash ratio for both the A and B applications in examples 4-3 was 0.33, and the material was used in a 1:1 mass ratio of A to B, and was designated KNGQ-3.
Examples 4 to 4
The high-durability self-repairing inorganic material (quick-setting high-strength) for reinforcement and repair comprises the following raw materials in percentage by mass:
and (3) material A: 99.3% of 52.5-grade sulphoaluminate cement, 0.3% of water reducer and 0.4% of boric acid;
and (2) material B: 17% of gypsum powder, 22% of industrial low-grade calcium hydroxide powder, 40.4% of blast furnace slag powder, 16% of steel slag powder, 3% of nano-scale calcium carbonate, 1.0% of crack self-repairing agent and 0.6% of water reducer.
The water to ash ratio for both the A and B applications in examples 4-4 was 0.33, and the material was used at a 1:1 mass ratio of A to B, and was designated KNGQ-4.
In order to clearly define the performance characteristics of the products and application products of the invention, a common PO42.5 cement and water glass system is used as a comparison sample. The weight percentages of the raw materials are as follows: the material A is PO42.5 cement 99.8%, polycarboxylate water reducer 0.2%, and the water-cement ratio of the material A is 0.5. The material B is water glass solution with Baume degree of 38 Be'. When in use, the material is marked as CGSY-1 according to the volume ratio of the material A to the material B of 1:1.
The preparation method in the embodiment 1 of the application number CN2021116093773, namely a double-liquid rapid-hardening grouting reinforcement inorganic material and a construction process, is used for preparing the double-liquid rapid-hardening grouting reinforcement inorganic material, wherein the double-component inorganic material comprises a material A and a material B, and comprises the following raw materials in percentage by mass: wherein the material A comprises 20% of sulphoaluminate cement, 30% of plugging agent, 5% of cement-based permeable crystallization active master batch, 44% of fly ash and 0.3% of cellulose ether; the material B comprises 40% of calcium oxide, 50% of talcum powder, 9% of accelerator and 0.5% of naphthalene-based superplasticizer, and the water-cement ratio of the material A to the material B is 0.35, and the material is marked as CGSY-2.
According to the 16 products SHNZQ-1, SHNZQ-2, SHNZQ-3, SHNZQ-4, SUNZQ-1, SUNZQ-2, SUNZQ-3, SUNZQ-4, SNCZQ-1, SNCZQ-2, SNCZQ-3, SNCZQ-4, KNGQ-1, KNGQ-2, KNGQ-3, KNGQ-4 and conventional comparative CGSY-1, CGSY-2, the 18 products were molded into 40mm×40mm cubic test molds according to the respective water cement ratio and the respective methods, and the test pieces were subjected to compressive strength test under a standard air curing system after the mold removal, and the compressive strength test was carried out for 1h, 4h, 1d, 7d, 28d, 90d and 270d, with the results shown in Table 1.
Table 1 eighteen example product performance metrics
As can be seen from the comparison of the data in Table 1, the Portland cement+water glass system, labeled CGSY-1, has low early and late strength and different degrees of strength scaling as the age progresses to 90d and 270 d.
The sulphoaluminate cement double-slurry system marked as CGSY-2 has shorter setting time, gradually increases the strength in the age of 1 h-28 d, but has small-amplitude reverse shrinkage after the age of 90d and 280 d.
Compared with the materials marked as CGSY-1 and CGSY-2, the material series of the invention has the advantages of continuously increasing the ages of 90d and 270d, no problem of shrinkage and collapse in strength, adjustable setting time, high compressive strength and high durability.
According to the invention, the balance of the relation among the setting time, the strength exertion at each age and the hydration process of the material is realized by matching the sulphoaluminate cement and the sulphoaluminate clinker powder, regulating and controlling the calcium hydroxide grade and the content, the gypsum content, the sodium sulfate content and the boric acid content of other materials, and simultaneously, the nano calcium carbonate is innovatively introduced to promote hydration and stabilize the crystal form of hydrated minerals, and the self-repairing agent for cracks of the sulphoaluminate cement system is matched to jointly improve the durability of the material, so that the material has the characteristics of adjustable performance, self-repairing and high durability.
The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (8)
1. A high durability self-healing inorganic material for reinforcement and healing, characterized by: comprises four varieties of flash early strength type, quick hardening super early strength type and quick hardening high strength type; the four varieties are composed of a material A and a material B;
the mass percentages of the raw materials of each variety are specifically as follows:
(1) Flash early strength type
And (3) material A: 70 to 80 percent of 72.5-grade sulphoaluminate clinker powder, 19.5 to 29.5 percent of 52.5-grade sulphoaluminate cement, 0.4 to 0.6 percent of water reducer and 0.1 to 0.2 percent of boric acid;
and (2) material B: 15-20% of gypsum powder, 30-35% of industrial high-grade calcium hydroxide powder, 30-35% of blast furnace slag powder, 10-15% of steel slag powder, 3-5% of nano-grade calcium carbonate, 1-1.5% of crack self-repairing agent, 2-3% of sodium sulfate and 0.6-0.8% of water reducer;
(2) Quick setting early strength type
And (3) material A: 29 to 35 percent of 72.5-grade sulphoaluminate clinker powder, 64 to 70 percent of 52.5-grade sulphoaluminate cement, 0.4 to 0.6 percent of water reducer and 0.3 to 0.4 percent of boric acid;
and (2) material B: 15 to 17 percent of gypsum powder, 22 to 24 percent of industrial low-grade calcium hydroxide powder, 35 to 38 percent of blast furnace slag powder, 15 to 18 percent of steel slag powder, 3 to 5 percent of nano-grade calcium carbonate, 1 to 1.5 percent of crack self-repairing agent and 0.6 to 0.8 percent of water reducer;
(3) Quick setting super early strength type
And (3) material A: 15 to 17 percent of 72.5-grade sulphoaluminate clinker powder, 82 to 84 percent of 52.5-grade sulphoaluminate cement, 0.4 to 0.6 percent of water reducer and 0.3 to 0.4 percent of boric acid;
and (2) material B: 15 to 17 percent of gypsum powder, 22 to 24 percent of industrial high-grade calcium hydroxide powder, 37 to 40 percent of blast furnace slag powder, 12 to 15 percent of steel slag powder, 3 to 5 percent of nano-grade calcium carbonate, 1 to 1.5 percent of crack self-repairing agent, 2 to 3 percent of sodium sulfate and 0.6 to 0.8 percent of water reducer;
(4) Quick-setting high-strength type
And (3) material A: 99 to 99.3 percent of 52.5-grade sulphoaluminate cement, 0.4 to 0.6 percent of water reducer and 0.3 to 0.4 percent of boric acid;
and (2) material B: 15 to 17 percent of gypsum powder, 22 to 24 percent of industrial low-grade calcium hydroxide powder, 37 to 40 percent of blast furnace slag powder, 15 to 18 percent of steel slag powder, 3 to 5 percent of nano-grade calcium carbonate, 1 to 1.5 percent of crack self-repairing agent and 0.6 to 0.8 percent of water reducer;
the crack self-repairing agent is prepared from the following raw materials in percentage by mass; the industrial high-grade calcium hydroxide powder is produced industrially, the content of calcium is 90-95%, and the specific surface area is more than or equal to 500m 2 /kg; the industrial low-grade calcium hydroxide powder is produced industrially, the content of calcium is 40-50%, and the specific surface area is more than or equal to 500m 2 /kg；
When in use, the material A and the material B are respectively added with water according to the water-cement ratio of 0.3-0.33 to prepare slurry, and the mass ratio of the two slurries is 1:1 are matched for use.
2. The high durability self-healing inorganic material for reinforcement and repair according to claim 1, wherein: the 72.5-grade sulphoaluminate clinker powder is prepared by grinding 72.5-grade sulphoaluminate plastics, and the specific surface area is more than or equal to 450m 2 /kg; the specific surface area of the 52.5-grade sulphoaluminate cement is more than or equal to 400m 2 /kg。
3. The high durability self-healing inorganic material for reinforcement and repair according to claim 1, wherein: the boric acid is retarder, the content of which is more than or equal to 95 percent, and is powdery; the water reducer is a powdery polycarboxylic acid high-efficiency water reducer; the gypsum powder is dihydrate gypsum CaSO 4 ·2H 2 O or anhydrite (CaSO) 4 ) Is prepared by grinding, and the specific surface area is more than or equal to 400m 2 /kg。
4. The high durability self-healing inorganic material for reinforcement and repair according to claim 1, wherein: the blast furnace slag powder is prepared by punching with a Inkpad method and grinding, and the specific surface area is more than or equal to 400m 2 The 7d activity index of the catalyst is more than or equal to 80 percent, and the 28d activity index of the catalyst is more than or equal to 105 percent.
5. The high durability self-healing inorganic material for reinforcement and repair according to claim 1, wherein: the steel slag powder is processed by hot disintegrating or wind quenching converter slag, and is ground to a specific surface area of more than or equal to 400m 2 The 7d activity index of the catalyst is more than or equal to 65 percent, and the 28d activity index of the catalyst is more than or equal to 75 percent.
6. The high durability self-healing inorganic material for reinforcement and repair according to claim 1, wherein: the sodium sulfate Na 2 SO 4 The content reaches more than 90 percent.
7. The high durability self-healing inorganic material for reinforcement and repair according to claim 1, wherein: the nano-grade calcium carbonate is prepared by a precipitation method or a carbonation method, the content of the calcium carbonate is more than or equal to 95 percent, and the crystal granularity of the calcium carbonate is less than or equal to 1 mu m.
8. The method of using a high durability self-healing inorganic material according to any one of claims 1 to 7, wherein: the material A and the material B are respectively added with water according to the water-cement ratio of 0.3-0.33 to prepare slurry, and the mass ratio of the two slurries is 1:1, carrying out matched use; and when the material is cured, moisture curing is adopted.
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