High-durability and good-bonding-property grouting material and preparation method thereof

Abstract

The invention is suitable for the technical field of grouting materials, and provides a grouting material with high durability and good bonding performance and a preparation method. Comprising the following components: 20 to 30 parts of Portland cement, 30 to 45 parts of sulphoaluminate cement, 0.5 to 2 parts of an early strength agent, 15 to 25 parts of fly ash, 5 to 10 parts of silicon dioxide, 0.5 to 1 part of soybean oil, 0.5 to 1 part of vegetable tannin, 1 to 2 parts of a water reducing agent, 0.2 to 0.5 part of fish gelatin, 0.05 to 0.15 part of a retarder and 0.05 to 0.1 part of an air entraining agent. Preferably, the grouting material further comprises blast furnace slag and wood pulp fibers, the mass fraction of the blast furnace slag is 10 to 20 parts, and the mass fraction of the wood pulp fibers is 0.1 to 0.5 part; the mass ratio of the Portland cement to the sulphoaluminate cement is 2: 3, and the early strength agent is one or more of lithium sulfate and lithium carbonate. The durability and binding property of the grouting material are remarkably improved, and the crack resistance, flexibility and constructability of the grouting material are enhanced, so that the grouting material can better adapt to complex and changeable construction environments and long-term load effects and has wide application prospects.

Description

Technical Field

[0001] The invention relates to the technical field of grouting materials, in particular to a grouting material with high durability and good bonding properties and a preparation method thereof. Background Art

[0002] Grouting material is a material commonly used in construction projects, mainly used to fill cracks, holes or voids, and to enhance the stability of soil or structures. Grouting material has excellent fluidity, injectability and rapid curing characteristics, and is widely used in underground projects, tunnels, bridges, dams and other fields. Its formula usually includes cement, chemical additives, fillers and water.

[0003] Grouting materials are commonly used in soil processing, crack repair, underground engineering, grouting reinforcement, etc. Soil reinforcement refers to injecting slurry into soft or unstable soil through grouting to improve the soil's bearing capacity and stability; crack repair refers to filling cracks in structures such as buildings, bridges, tunnels, etc. to prevent water infiltration or further expansion; underground engineering refers to underground engineering, such as tunnels, foundation pits, etc., where grouting materials are used to seal cracks or prevent water seepage; grouting reinforcement refers to foundation reinforcement or mine reinforcement, where grouting materials can be used to fill gaps and increase the bearing capacity of the foundation.

[0004] The durability and bonding of grouting materials are key factors that determine their performance and effects in long-term use, especially in underground projects, building repair and reinforcement. Durability refers to the ability of grouting materials to resist the influence of environmental factors (such as moisture, temperature changes, chemical corrosion, etc.) during long-term use. Grouting materials with high durability can ensure the long-term stability of the project and reduce the frequency of maintenance and repair. Bonding refers to the bond strength and adhesion between the grouting material and the injected material (such as concrete, rock and soil, etc.). Good bonding can ensure that the grouting material and the foundation structure are closely combined, share the load, and ensure the reinforcement or repair effect.

[0005] However, traditional grouting materials have problems with durability and insufficient bonding in certain application scenarios, which limits their scope of use. For example, a Chinese patent with application number 202111586939.7 and publication number CN114292083A discloses a low-viscosity elastic grouting material: "A two-component low-viscosity elastic grouting material with excellent waterproof and leak-proof effect, healthy and environmentally friendly; the formula of the low-viscosity elastic grouting material is composed of material A: 80% sodium silicate solution, 8% sodium methyl silicate solution, 8% deionized water, 3% triethanolamine, and 1% storage stabilizer; the formula of material B: 30% 40% aluminum sulfate solution, 60% vinyl acetate-ethylene copolymer emulsion, and 10% inorganic aluminum salt waterproofing agent; a low-viscosity two-liquid grouting machine is used to simultaneously inject material A and material B into the building structure with floor tiles through high-pressure grouting. After mixing and reacting, a water-insoluble and highly elastic gel-like solid substance is generated and solidified in the gap to block the leakage channel; it is mainly suitable for waterproofing and leak-proof repairs of outdoor open-air platforms and roofs of buildings that have been tiled."

[0006] In order to improve the durability and bonding of grouting materials, the present invention provides a grouting material with high durability and good bonding and a preparation method thereof. Summary of the invention

[0007] The object of the present invention is to provide a grouting material with high durability and good bonding properties and a preparation method thereof, so as to solve the problems of insufficient durability and bonding properties of the conventional grouting materials in the prior art in certain application scenarios.

[0008] To achieve the above object, the present invention provides the following technical solution: In a first aspect, the present invention provides a grouting material with high durability and good bonding properties, which comprises the following components in parts by mass:

[0009] 20-30 parts of Portland cement, 30-45 parts of sulphoaluminate cement, 0.5-2 parts of early strength agent, 15-25 parts of fly ash, 5-10 parts of silicon dioxide, 0.5-1 parts of soybean oil, 0.5-1 parts of vegetable tannins, 1-2 parts of water reducer, 0.2-0.5 parts of fish glue, 0.05-0.15 parts of retarder, and 0.05-0.1 parts of air entraining agent.

[0010] Preferably, the grouting material also includes blast furnace slag and wood pulp fibers.

[0011] Preferably, the mass fraction of the blast furnace slag is 10-20 parts, and the mass fraction of the wood pulp fiber is 0.1-0.5 parts.

[0012] Preferably, the mass ratio of the silicate cement to the sulphoaluminate cement is 2:3.

[0013] Preferably, the early strength agent is one or more of lithium sulfate and lithium carbonate.

[0014] Preferably, the water reducer is a polycarboxylate water reducer or an aminosulfonate water reducer.

[0015] Preferably, the retarder is one or more of sodium gluconate, tartaric acid, polyvinyl alcohol, and sodium dihydrogen phosphate.

[0016] Preferably, the air entraining agent is one or more of polyether modified air entraining agent, rosin soap, and fatty acid ester.

[0017] The second aspect of the present invention provides a method for preparing the grouting material according to the first aspect of the present invention, comprising the following steps:

[0018] Weigh all raw materials in proportion, add the remaining ingredients except vegetable tannin, fish glue and air entraining agent into a high-speed mixer, add appropriate amount of water, stir evenly at 300-500rpm, then add vegetable tannin, fish glue and air entraining agent, and stir at 1000-1500rpm for 10-15min.

[0019] The present invention has at least the following beneficial effects:

[0020] The invention provides a grouting material with high durability and good bonding and a preparation method, which not only significantly improves the durability and bonding of the grouting material, but also enhances its crack resistance, flexibility and workability, making it more adaptable to complex and changeable construction environments and long-term load effects, and has broad application prospects. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] The present invention provides a grouting material with high durability and good bonding properties, which comprises the following components in parts by mass:

[0023] 20-30 parts of Portland cement, 30-45 parts of sulphoaluminate cement, 0.5-2 parts of early strength agent, 15-25 parts of fly ash, 5-10 parts of silicon dioxide, 0.5-1 parts of soybean oil, 0.5-1 parts of vegetable tannins, 1-2 parts of water reducer, 0.2-0.5 parts of fish glue, 0.05-0.15 parts of retarder, and 0.05-0.1 parts of air entraining agent.

[0024] The grouting material also includes blast furnace slag and wood pulp fiber, the mass fraction of blast furnace slag is 10-20 parts, and the mass fraction of wood pulp fiber is 0.1-0.5 parts.

[0025] Among them, the mass ratio of silicate cement to sulphoaluminate cement is 2:3.

[0026] Among them, the early strength agent is one or more of lithium sulfate and lithium carbonate; the water reducer is a polycarboxylate water reducer or an aminosulfonate water reducer; the retarder is one or more of sodium gluconate, tartaric acid, polyvinyl alcohol, and sodium dihydrogen phosphate; the air entraining agent is one or more of a polyether modified air entraining agent, rosin soap, and fatty acid ester.

[0027] The preparation method of the above grouting material comprises the following steps:

[0028] Weigh all raw materials in proportion, add the remaining ingredients except vegetable tannin, fish glue and air entraining agent into a high-speed mixer, add appropriate amount of water, stir evenly at 300-500rpm, then add vegetable tannin, fish glue and air entraining agent, and stir at 1000-1500rpm for 10-15min.

[0029] The functions of each component in the present invention are as follows:

[0030] As the main cementitious materials, silicate cement and sulphoaluminate cement provide the basic strength and durability of the grouting material; fly ash and silica as active admixtures can not only improve the density and strength of the grouting material, but also enhance its durability; the addition of soybean oil can improve the workability of the grouting material, making it easier to construct; plant tannin, as a natural organic compound, can enhance the adhesion and impermeability of the grouting material; fish glue can improve the flexibility and water resistance of the grouting material; the addition of water reducer can effectively reduce the water-cement ratio of the grouting material, thereby improving its strength and durability; retarder is used to adjust the setting time of the grouting material to meet different construction requirements; air entraining agent can introduce tiny bubbles to improve the frost resistance and durability of the grouting material.

[0031] In addition, blast furnace slag, as an active mineral admixture, can undergo secondary hydration reaction with cement hydration products to generate more hydrated calcium silicate gel, thereby improving the strength and durability of the grouting material; at the same time, blast furnace slag can also refine the pore structure of the grouting material, reduce the number of harmful pores, and further improve its impermeability and durability; wood pulp fiber, as an organic fiber, can be evenly dispersed in the grouting material to form a three-dimensional network structure, effectively preventing the formation and development of cracks, and improving the crack resistance and flexibility of the grouting material; wood pulp fiber can also increase the water retention and workability of the grouting material, making it easier to construct and pump.

[0032] Based on the above technical solution, the present invention provides the following partial embodiments:

[0033] Example 1

[0034] This embodiment provides a grouting material with high durability and good bonding properties, which includes the following components in parts by mass:

[0035] 20 parts of Portland cement, 30 parts of sulphoaluminate cement, 0.5 parts of early strength agent, 15 parts of fly ash, 5 parts of silicon dioxide, 0.5 parts of soybean oil, 0.5 parts of vegetable tannin, 1 part of water reducing agent, 0.2 parts of fish glue, 0.05 parts of retarder and 0.05 parts of air entraining agent.

[0036] Among them, the early strength agent is lithium sulfate; the water reducer is polycarboxylate water reducer; the retarder is sodium gluconate; and the air entraining agent is rosin soap.

[0037] The preparation method of the grouting material comprises the following steps:

[0038] Weigh 20 parts of Portland cement, 30 parts of sulphoaluminate cement, 0.5 parts of early strength agent, 15 parts of fly ash, 5 parts of silicon dioxide, 0.5 parts of soybean oil, 1 part of water reducer and 0.05 parts of retarder in proportion, first add them into a high-speed mixer, add appropriate amount of water, stir evenly at 300 rpm, then add 0.5 parts of vegetable tannin, 0.2 parts of fish glue and 0.05 parts of air entraining agent, and stir at 1000 rpm for 15 minutes.

[0039] Example 2

[0040] This embodiment provides a grouting material with high durability and good bonding properties, which includes the following components in parts by mass:

[0041] 24 parts of Portland cement, 36 parts of sulphoaluminate cement, 1 part of early strength agent, 18 parts of fly ash, 7 parts of silicon dioxide, 0.6 parts of soybean oil, 0.9 parts of vegetable tannin, 1.5 parts of water reducer, 0.3 parts of fish glue, 0.1 parts of retarder, and 0.08 parts of air entraining agent.

[0042] Among them, the mass ratio of silicate cement to sulphoaluminate cement is 2:3; the early strength agent is lithium sulfate; the water reducer is aminosulfonate water reducer; the retarder is tartaric acid; and the air entraining agent is a polyether modified air entraining agent.

[0043] The preparation method of the grouting material comprises the following steps:

[0044] Weigh 24 parts of silicate cement, 36 parts of sulphoaluminate cement, 1 part of early strength agent, 18 parts of fly ash, 7 parts of silicon dioxide, 0.6 parts of soybean oil, 1.5 parts of water reducer and 0.1 part of retarder in proportion, first add them into a high-speed mixer, add appropriate amount of water, stir evenly at 400 rpm, then add 0.9 parts of vegetable tannin, 0.3 parts of fish glue and 0.08 parts of air entraining agent, and stir at 1200 rpm for 12 minutes.

[0045] Example 3

[0046] This embodiment provides a grouting material with high durability and good bonding properties, which includes the following components in parts by mass:

[0047] 30 parts of Portland cement, 45 parts of sulphoaluminate cement, 2 parts of early strength agent, 25 parts of fly ash, 10 parts of silicon dioxide, 1 part of soybean oil, 1 part of vegetable tannin, 2 parts of water reducing agent, 0.5 parts of fish glue, 0.15 parts of retarder, and 0.1 parts of air entraining agent.

[0048] Among them, the mass ratio of silicate cement to sulphoaluminate cement is 2:3; the early strength agent is lithium carbonate; the water reducer is polycarboxylate water reducer; the retarder is sodium dihydrogen phosphate; and the air entraining agent is fatty acid ester.

[0049] The preparation method of the grouting material comprises the following steps:

[0050] Weigh 30 parts of Portland cement, 45 parts of sulphoaluminate cement, 2 parts of early strength agent, 25 parts of fly ash, 10 parts of silicon dioxide, 1 part of soybean oil, 2 parts of water reducer and 0.15 parts of retarder in proportion, first add them into a high-speed mixer, add appropriate amount of water, stir evenly at 500 rpm, then add 1 part of vegetable tannin, 0.5 parts of fish glue and 0.1 parts of air entraining agent, and stir at 1500 rpm for 10 minutes.

[0051] Example 4

[0052] This embodiment provides a grouting material with high durability and good bonding properties. It is the same as Embodiment 1, except that it also includes blast furnace slag and wood pulp fiber. The mass fraction of blast furnace slag is 10 parts, and the mass fraction of wood pulp fiber is 0.1 parts.

[0053] Example 5

[0054] This embodiment provides a grouting material with high durability and good bonding properties. It is the same as Embodiment 1, except that it also includes blast furnace slag and wood pulp fiber. The mass fraction of blast furnace slag is 15 parts, and the mass fraction of wood pulp fiber is 0.3 parts.

[0055] Example 6

[0056] This embodiment provides a grouting material with high durability and good bonding properties. It is the same as Embodiment 1, except that it also includes blast furnace slag and wood pulp fiber. The mass fraction of blast furnace slag is 20 parts, and the mass fraction of wood pulp fiber is 0.5 parts.

[0057] A series of relevant performance tests were performed on the products prepared in the above Examples 1-6, and the results are as follows:

[0058] Experimental Project unit result Compressive strength (28d) MPa ≥51.6 Flexural strength (28d) MPa ≥11.4 Bond strength MPa ≥5.4 Tensile bond strength MPa ≥3.2 Interface adhesion MPa ≥2.6 Temperature resistance ℃ ≥150 Frost resistance Second-rate ≥400 Water permeability coefficient m / s <![CDATA[<2×10 -9 ]]>

[0059] In summary, the present invention provides a grouting material with high durability and good bonding and a preparation method, which significantly improves the durability and bonding of the grouting material by optimizing the composition and preparation process of the grouting material. The grouting material has excellent compressive strength, flexural strength, bonding strength, tensile bonding strength and interfacial bonding, and also exhibits good temperature resistance, frost resistance and low water permeability coefficient. The improvement of these properties makes the grouting material of the present invention have a wider application prospect in the fields of underground engineering, building repair and reinforcement.

[0060] The above shows and describes the basic principles, main features and advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A grouting material with high durability and good bonding properties, characterized in that: The composition is calculated by weight: 20-30 parts of Portland cement, 30-45 parts of sulphoaluminate cement, 0.5-2 parts of early strength agent, 15-25 parts of fly ash, 5-10 parts of silicon dioxide, 0.5-1 parts of soybean oil, 0.5-1 parts of vegetable tannins, 1-2 parts of water reducer, 0.2-0.5 parts of fish glue, 0.05-0.15 parts of retarder, and 0.05-0.1 parts of air entraining agent.

2. A grouting material with high durability and good bonding properties according to claim 1, characterized in that: The grouting material also includes blast furnace slag and wood pulp fibers.

3. A grouting material with high durability and good bonding properties according to claim 2, characterized in that: The mass fraction of the blast furnace slag is 10-20 parts, and the mass fraction of the wood pulp fiber is 0.1-0.5 parts.

4. The grouting material with high durability and good bonding properties according to claim 1, characterized in that: The mass ratio of the silicate cement to the sulphoaluminate cement is 2:

3.

5. The grouting material with high durability and good bonding properties according to claim 1, characterized in that: The early strength agent is one or more of lithium sulfate and lithium carbonate.

6. The grouting material with high durability and good bonding properties according to claim 1, characterized in that: The water reducer is a polycarboxylate water reducer or an aminosulfonate water reducer.

7. The grouting material with high durability and good bonding properties according to claim 1, characterized in that: The retarder is one or more of sodium gluconate, tartaric acid, polyvinyl alcohol, and sodium dihydrogen phosphate.

8. The grouting material with high durability and good bonding properties according to claim 1, characterized in that: The air entraining agent is one or more of polyether modified air entraining agent, rosin soap, and fatty acid ester.

9. A method for preparing a grouting material according to any one of claims 1 to 8, characterized in that: The following steps are involved: Weigh all raw materials in proportion, add the remaining ingredients except vegetable tannin, fish glue and air entraining agent into a high-speed mixer, add appropriate amount of water, stir evenly at 300-500rpm, then add vegetable tannin, fish glue and air entraining agent, and stir at 1000-1500rpm for 10-15min.