Underwater cement-based double-liquid grouting material as well as preparation method and application thereof

Abstract

The invention discloses an underwater cement-based double-liquid grouting material as well as a preparation method and application thereof. The grouting material is prepared by mixing a component A and a component B according to a mass ratio of 1: 1, the component A comprises the following raw materials: Portland cement, an admixture, a water reducing agent, a viscosity modifier, a composite flocculant, a composite thickening time control agent, a plastic expanding agent and a defoaming agent; the component B is prepared from the following raw materials in parts by mass: sulphoaluminate cement, an admixture, a water reducing agent, a viscosity modifier, a compound flocculating agent, an underground water-resistant multi-ion coupling corrosion agent, a compound thickening time control agent and a defoaming agent. The material provided by the invention has the advantages of good fluidity, good non-separability in water, strong dynamic water impact resistance, rapid hardening, high strength, high bonding strength, good corrosion resistance and the like, and is suitable for grouting and leaking stoppage of water spraying and gushing in the fields of coal mines and the like, and repairing and reinforcing of underwater concrete structures of projects such as hydraulic facilities, ocean engineering, bridges, tunnels and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of novel grouting materials, and in particular relates to an underwater cement-based double-liquid grouting material and a preparation method and application thereof. Background Art

[0002] In the process of coal mining, the coal seams in the fully mechanized mining face are often soft, the structure is unstable, and there is a lot of water in the fissures between the coal seams. In addition, the mining height is large, and the working face is easily affected by mining stress. It is easy to have accidents such as spalling, roof collapse, water dripping, and water gushing, which affect normal coal mining work, reduce coal output, and increase the difficulty of safe production. At present, the problem is mainly solved by grouting in soft coal seams or fissures. The grouting materials mainly include machine grouting materials represented by Marisan and inorganic grouting materials represented by ordinary cement slurry. Marisan can solidify quickly and block water quickly, but its price is very expensive and its economic efficiency is not good. It can only temporarily block water dripping and gushing, and cannot be soaked in water for a long time, and cannot fundamentally solve the problem; while ordinary cement slurry is cheap, but its setting time is long, and it is easily diluted and dispersed by water in the presence of water, and cannot effectively solve the problem. In addition, in some underground environments, the water temperature, sulfate ion, chloride ion content, etc. are different, which have a prominent impact on the setting time, adhesion and durability of cement, resulting in uncertainty in the use of materials and greatly affecting the application effect of materials. This results in great differences in the application effects of the same material in different coal mine scenarios.

[0003] Therefore, developing an underwater rapid-setting grouting material that can be reverse-designed and regulated according to actual application conditions and needs to meet the needs of reinforcement of water-permeable plugging agents for different coal mines under different geological environments is of great significance to the economic, efficient and safe mining of coal. Summary of the invention

[0004] The purpose of the present invention is to provide an underwater cement-based two-liquid grouting material and a preparation method and application thereof, which can be directly constructed in water without dispersion and segregation, and can quickly solidify and quickly block water, aiming to solve the problems of high cost and poor effect of existing grouting materials.

[0005] The present invention is implemented as follows: an underwater cement-based two-liquid grouting material, the grouting material comprises a component A raw material and a component B raw material; wherein,

[0006] The raw materials of component A include the following components by mass: 80-95 parts of silicate cement, 5-20 parts of admixture, 0.2-1 parts of water reducing agent, 0.01-0.05 parts of viscosity modifier, 0.2-0.5 parts of composite flocculant, 1.5-2.5 parts of composite coagulant, 0.05-0.15 parts of volume stabilizer, 0.05-0.15 parts of defoamer, and 30-60 parts of water;

[0007] The raw materials of component B are as follows, calculated by mass: 80-95 parts of sulphoaluminate cement, 5-20 parts of admixture, 0.2-1 part of water reducer, 0.01-0.05 part of viscosity regulator, 0.2-0.5 part of composite flocculant, 0-2 parts of anti-groundwater multi-ion coupling corrosion agent, 0-0.5 parts of composite coagulant, 0.05-0.15 parts of defoamer and 30-60 parts of water.

[0008] Preferably, the silicate cement is of P·O 42.5 grade or 52.5 grade, and the sulphoaluminate cement is of rapid hardening sulphoaluminate cement of 42.5 grade or 52.5 grade.

[0009] Preferably, the admixture is selected from at least one of mineral powder and pulverized coal.

[0010] Preferably, the water reducing agent is a powdered polycarboxylic acid water reducing agent, and the water reducing rate is greater than 35%.

[0011] Preferably, the viscosity modifier is selected from one or more of methyl cellulose, carboxymethyl cellulose, hydroxypropyl methyl cellulose and water-soluble polyvinyl alcohol.

[0012] Preferably, the composite flocculant is composed of anionic polyacrylamide, xanthan gum and hydroxypropyl methylcellulose ether in a mass ratio of 2.0-5.0:0.5-1:1.0-4.0;

[0013] Preferably, the composite setting regulator is composed of a mixture of a setting accelerator and a setting retarder in a mass ratio of 0.01-2.0:0.01-1, wherein the setting accelerator is selected from one or more of calcium formate, aluminum sulfate, lithium carbonate, and lithium sulfate; and the setting retarder is selected from one or more of sodium gluconate, citric acid, and tartaric acid.

[0014] Preferably, the anti-underground water multi-ion coupling corrosion agent is composed of a mixture of synthetic magnesium aluminum hydrotalcite, calcined magnesium aluminum hydrotalcite and chloride ion adsorption resin in a mass ratio of 3.0-5.0:3.5-1:0.1-1.0.

[0015] Preferably, the volume stabilizer is one or both of a plastic expansion agent and a calcium-magnesium composite expansion agent.

[0016] Preferably, the defoamer is a polyether powder defoamer or a silicone powder defoamer.

[0017] The present invention further discloses a method for preparing the above grouting material, which comprises the following steps:

[0018] (1) Mix the components in the A component raw material, add water at a water-cement ratio of 0.3 to 0.6 and stir evenly to obtain A slurry with an adjustable setting time of 30 minutes to 2 hours;

[0019] (2) Mix the components in the B component raw material, add water at a water-cement ratio of 0.3 to 0.6 and stir evenly to obtain a B slurry with an adjustable setting time of 30 minutes to 2 hours;

[0020] (3) Mix slurry A and slurry B in a mass ratio of 1:1 and perform grouting construction using a special dual-liquid grouting pump.

[0021] The present invention overcomes the deficiencies of the prior art and provides an underwater cement-based two-liquid grouting material and a preparation method and application thereof. The present invention is based on the hydration of cement-based materials and the mechanism of action between them and admixtures. By regulating the cohesion and coagulation behavior of inorganic grouting materials in water, the flow, cohesion and coagulation can be controlled and balanced, thereby realizing the design of materials according to application conditions and problem characteristics (such as leakage volume, leakage rate, water quality, temperature, etc.), so that the grouting materials can be quickly hardened in water to meet the needs of water blocking. The key technology is to achieve precise control of the fluidity, cohesion and coagulation of the slurry through compounding of admixtures, and at the same time, by designing functional components, the slurry can adapt to different water quality environments and temperature environments under different geological environments. The innovation lies in reversely designing the material composition according to the characteristics of the application conditions, regulating the material properties, and achieving the material application goals. When the present invention is used, slurry A and slurry B are mixed in a mass ratio of 1:1, and construction is carried out through a special double-liquid grouting pump. The material mixture has good construction performance and water-resistant dispersibility during underwater construction, and the hardened solidified body has the characteristics of plugging leaks, preventing seepage, early strength, and no shrinkage. The setting time of the mixture is 1 to 10 minutes and is adjustable. The compressive strength after hardening and consolidation for 1 hour is 5 to 20 MPa, the compressive strength after 1 day can exceed 40 MPa, the compressive strength after 3 days can exceed 50 MPa, and the compressive strength after 28 days can reach more than 60 MPa.

[0022] Compared with the shortcomings and deficiencies of the prior art, the present invention has the following beneficial effects:

[0023] (1) The material mixture of the present invention has excellent self-leveling and anti-dispersion properties, can effectively fill cavities and cracks, reduce the performance strength loss caused by the dilution and dispersion of the slurry by water, and reduce water pollution during grouting;

[0024] (2) The material of the present invention has high early strength and rapid development after curing, and high late strength and no shrinkage;

[0025] (3) The material of the present invention has good bonding properties after curing, and has high bonding strength with the base or steel bars;

[0026] (4) The hardened solid body of the material of the present invention has high volume stability and micro-expansion, which can avoid the performance degradation caused by cracks caused by shrinkage;

[0027] (5) The material cost of the present invention is low and the construction operation is simple;

[0028] (6) The material of the present invention can be used for grouting and plugging water in water sprinkling and gushing in coal mines and other fields, as well as for repairing and reinforcing underwater concrete structures of hydraulic facilities, marine engineering, bridges, tunnels and other projects. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] Example 1

[0031] An underwater cement-based two-liquid grouting material comprises the following components A and B in terms of mass fraction:

[0032] A component raw materials include:

[0033] Portland cement (P·O42.5 grade): 900;

[0034] Admixture (mineral powder): 100;

[0035] Water reducing agent (powdered polycarboxylic acid water reducing agent, water reducing rate greater than 35%): 6.0;

[0036] Viscosity modifier (methyl cellulose): 0.1;

[0037] Composite flocculant (mass ratio of anionic polyacrylamide, xanthan gum and hydroxypropyl methylcellulose ether is 2.0-5.0: 0.5-1: 1.0-4.0): 3.0;

[0038] Composite setting regulator (mass ratio of accelerator to retarder is 0-2.0:0-1, the accelerator is selected from one or more of calcium formate, aluminum sulfate, lithium carbonate, and lithium sulfate; the retarder is selected from one or more of sodium gluconate, citric acid, and tartaric acid): 15;

[0039] Volume stabilizer (yellow powder plastic expansion agent): 1.0;

[0040] Defoamer (polyether powder defoamer): 0.5;

[0041] Water: 300;

[0042] The raw materials of component B include:

[0043] Sulphoaluminate cement (rapid hardening sulphoaluminate cement 42.5): 900;

[0044] Admixture (fly ash): 100;

[0045] Water reducing agent (powdered polycarboxylic acid water reducing agent, water reducing rate greater than 35%): 6.0;

[0046] Viscosity modifier (carboxymethyl cellulose): 0.1;

[0047] Composite flocculant (anionic polyacrylamide, xanthan gum and hydroxypropyl methylcellulose ether in a mass ratio of 2.0-5.0:0.5-1:1.0-4.0): 2.8;

[0048] Anti-underground water multi-ion coupling corrosion agent (composed of a mixture of synthetic magnesium aluminum hydrotalcite, calcined magnesium aluminum hydrotalcite and chloride ion adsorption resin in a mass ratio of 3.0-5.0:3.5-1:0.1-1.0): 0.2;

[0049] Composite setting regulator (accelerator and retarder are mixed in a mass ratio of 0-2.0:0-1, wherein the accelerator is selected from one or more of calcium formate, aluminum sulfate, lithium carbonate, and lithium sulfate; the retarder is selected from one or more of sodium gluconate, citric acid, and tartaric acid): 0.5;

[0050] Defoaming agent (yellow powder plastic expansion agent): 0.5;

[0051] Water: 300.

[0052] The preparation of the underwater cement-based double-liquid grouting material comprises the following steps:

[0053] (1) Mix the raw materials of component A and then mix them at a water-cement ratio of 0.3 to obtain slurry A with adjustable setting time;

[0054] (2) Mix the raw materials of component B and then mix them at a water-cement ratio of 0.3 to obtain a B slurry with adjustable setting time;

[0055] (3) The A slurry obtained in step (1) and step (2) and the corresponding B slurry are mixed in a mass ratio of 1:1 to obtain an underwater cement-based two-liquid grouting material 1.

[0056] Example 2

[0057] An underwater cement-based two-liquid grouting material comprises the following components A and B in terms of mass fraction:

[0058] A component raw materials include:

[0059] Portland cement (P·O 42.5 grade): 900;

[0060] Admixture (fly ash): 100;

[0061] Water reducing agent (powdered polycarboxylic acid water reducing agent, water reducing rate greater than 35%): 5.0;

[0062] Viscosity modifier (carboxymethyl cellulose): 0.1;

[0063] Composite flocculant (anionic polyacrylamide, xanthan gum and hydroxypropyl methylcellulose ether in a mass ratio of 2.0-5.0:0.5-1:1.0-4.0): 3.0;

[0064] Composite setting regulator (the setting accelerator and the setting retarder are mixed in a mass ratio of 0-2.0:0-1, wherein the setting accelerator is selected from one or more of calcium formate, aluminum sulfate, lithium carbonate, and lithium sulfate; the setting retarder is selected from one or more of sodium gluconate, citric acid, and tartaric acid): 13;

[0065] Volume stabilizer (yellow powder plastic expansion agent): 1.0;

[0066] Defoamer (organic silicon powder defoamer): 0.5;

[0067] Water: 500;

[0068] The raw materials of component B include:

[0069] Sulphoaluminate cement (rapid hardening sulphoaluminate cement grade 42.5): 900;

[0070] Admixture (fly ash): 100;

[0071] Water reducing agent (powdered polycarboxylic acid water reducing agent, water reducing rate greater than 35%): 5.0;

[0072] Viscosity modifier (hydroxypropyl methylcellulose): 0.1;

[0073] Composite flocculant (anionic polyacrylamide, xanthan gum and hydroxypropyl methylcellulose ether in a mass ratio of 2.0-5.0:0.5-1:1.0-4.0): 3.0;

[0074] Anti-underground water multi-ion coupling corrosion agent (composed of a mixture of synthetic magnesium aluminum hydrotalcite, calcined magnesium aluminum hydrotalcite and chloride ion adsorption resin in a mass ratio of 3.0-5.0:3.5-1:0.1-1.0): 2;

[0075] Composite setting regulator (accelerator and retarder are mixed in a mass ratio of 0-2.0:0-1, wherein the accelerator is selected from one or more of calcium formate, aluminum sulfate, lithium carbonate, and lithium sulfate; the retarder is selected from one or more of sodium gluconate, citric acid, and tartaric acid): 0.5;

[0076] Defoaming agent (yellow powder plastic expansion agent): 0.5;

[0077] Water: 500.

[0078] The preparation of the underwater cement-based double-liquid grouting material comprises the following steps:

[0079] (1) Mix the raw materials of component A and then mix them at a water-cement ratio of 0.5 to obtain slurry A with adjustable setting time;

[0080] (2) Mix the raw materials of component B and then mix them at a water-cement ratio of 0.5 to obtain a B slurry with adjustable setting time;

[0081] (3) The A slurry obtained in step (1) and step (2) and the corresponding B slurry are mixed in a mass ratio of 1:1 to obtain an underwater cement-based two-liquid grouting material 2.

[0082] Example 3

[0083] An underwater cement-based two-liquid grouting material comprises the following components A and B in terms of mass fraction:

[0084] A component raw materials include:

[0085] Portland cement (Portland cement P·O 42.5 grade): 900;

[0086] Admixture (mineral powder): 100;

[0087] Water reducing agent (powdered polycarboxylic acid water reducing agent, water reducing rate greater than 35%): 6.0;

[0088] Viscosity regulator (water-soluble polyvinyl alcohol): 0.1;

[0089] Composite flocculant (anionic polyacrylamide, xanthan gum and hydroxypropyl methylcellulose ether in a mass ratio of 2.0-5.0:0.5-1:1.0-4.0): 3.8;

[0090] Composite setting regulator (the setting accelerator and the setting retarder are mixed in a mass ratio of 0-2.0:0-1, wherein the setting accelerator is selected from one or more of calcium formate, aluminum sulfate, lithium carbonate, and lithium sulfate; the setting retarder is selected from one or more of sodium gluconate, citric acid, and tartaric acid): 20;

[0091] Volume stabilizer (yellow powder plastic expansion agent): 1.0;

[0092] Defoamer (polyether powder defoamer): 0.5;

[0093] Water: 300;

[0094] The raw materials of component B include:

[0095] Sulphoaluminate cement (rapid hardening sulphoaluminate cement grade 42.5): 900;

[0096] Admixture (fly ash): 100;

[0097] Water reducing agent (powdered polycarboxylic acid water reducing agent, water reducing rate greater than 35%): 6.0;

[0098] Viscosity modifier (hydroxypropyl methylcellulose): 0.1;

[0099] Composite flocculant (anionic polyacrylamide, xanthan gum and hydroxypropyl methylcellulose ether in a mass ratio of 2.0-5.0: 0.5-1: 1.0-4.0): 4.0;

[0100] Anti-underground water multi-ion coupling corrosion agent (composed of a mixture of synthetic magnesium aluminum hydrotalcite, calcined magnesium aluminum hydrotalcite and chloride ion adsorption resin in a mass ratio of 3.0-5.0:3.5-1:0.1-1.0): 0.2;

[0101] Composite setting regulator (accelerator and retarder are mixed in a mass ratio of 0-2.0:0-1, wherein the accelerator is selected from one or more of calcium formate, aluminum sulfate, lithium carbonate, and lithium sulfate; the retarder is selected from one or more of sodium gluconate, citric acid, and tartaric acid): 0.5;

[0102] Defoaming agent (yellow powder plastic expansion agent): 0.5;

[0103] Water: 300.

[0104] The preparation of the underwater cement-based double-liquid grouting material comprises the following steps:

[0105] (1) Mix the raw materials of component A and then mix them at a water-cement ratio of 0.3 to obtain slurry A with adjustable setting time;

[0106] (2) Mix the raw materials of component B and then mix them at a water-cement ratio of 0.3 to obtain a B slurry with adjustable setting time;

[0107] (3) The A slurry obtained in step (1) and step (2) and the corresponding B slurry are mixed in a mass ratio of 1:1 to obtain an underwater cement-based two-liquid grouting material 3.

[0108] Example 4

[0109] An underwater cement-based two-liquid grouting material comprises the following components A and B in terms of mass fraction:

[0110] A component raw materials include:

[0111] Portland cement (Portland cement P·O 42.5 grade): 900;

[0112] Admixture (mineral powder): 100;

[0113] Water reducing agent (powdered polycarboxylic acid water reducing agent, water reducing rate greater than 35%): 5.0;

[0114] Viscosity regulator (water-soluble polyvinyl alcohol): 0.1;

[0115] Composite flocculant (anionic polyacrylamide, xanthan gum and hydroxypropyl methylcellulose ether in a mass ratio of 2.0-5.0:0.5-1:1.0-4.0): 3.8;

[0116] Composite setting regulator (the setting accelerator and the setting retarder are mixed in a mass ratio of 0-2.0:0-1, wherein the setting accelerator is selected from one or more of calcium formate, aluminum sulfate, lithium carbonate, and lithium sulfate; the setting retarder is selected from one or more of sodium gluconate, citric acid, and tartaric acid): 20;

[0117] Volume stabilizer (yellow powder plastic expansion agent): 1.0;

[0118] Defoamer (polyether powder defoamer): 0.5;

[0119] Water: 500;

[0120] The raw materials of component B include:

[0121] Sulphoaluminate cement (rapid hardening sulphoaluminate cement grade 42.5): 900;

[0122] Admixture (fly ash): 100;

[0123] Water reducing agent (powdered polycarboxylic acid water reducing agent, water reducing rate greater than 35%): 5.0;

[0124] Viscosity modifier (hydroxypropyl methylcellulose): 0.1;

[0125] Composite flocculant (anionic polyacrylamide, xanthan gum and hydroxypropyl methylcellulose ether in a mass ratio of 2.0-5.0: 0.5-1: 1.0-4.0): 4.0;

[0126] Anti-underground water multi-ion coupling corrosion agent (composed of a mixture of synthetic magnesium aluminum hydrotalcite, calcined magnesium aluminum hydrotalcite and chloride ion adsorption resin in a mass ratio of 3.0-5.0:3.5-1:0.1-1.0): 0.2;

[0127] Composite setting regulator (accelerator and retarder are mixed in a mass ratio of 0-2.0:0-1, wherein the accelerator is selected from one or more of calcium formate, aluminum sulfate, lithium carbonate, and lithium sulfate; the retarder is selected from one or more of sodium gluconate, citric acid, and tartaric acid): 0.5;

[0128] Defoaming agent (yellow powder plastic expansion agent): 0.5;

[0129] Water: 500.

[0130] The preparation of the underwater cement-based double-liquid grouting material comprises the following steps:

[0131] (1) Mix the raw materials of component A and then mix them at a water-cement ratio of 0.5 to obtain slurry A with adjustable setting time;

[0132] (2) Mix the raw materials of component B and then mix them at a water-cement ratio of 0.5 to obtain a B slurry with adjustable setting time;

[0133] (3) The A slurry obtained in step (1) and step (2) and the corresponding B slurry are mixed in a mass ratio of 1:1 to obtain an underwater cement-based two-liquid grouting material 4.

[0134] Example 5

[0135] An underwater cement-based two-liquid grouting material comprises the following components A and B in terms of mass fraction:

[0136] A component raw materials include:

[0137] Portland cement (P·O 42.5 grade): 800;

[0138] Admixture (fly ash): 200;

[0139] Water reducing agent (powdered polycarboxylic acid water reducing agent, water reducing rate greater than 35%): 6.0;

[0140] Viscosity modifier (carboxymethyl cellulose): 0.1;

[0141] Composite flocculant (anionic polyacrylamide, xanthan gum and hydroxypropyl methylcellulose ether in a mass ratio of 2.0-5.0:0.5-1:1.0-4.0): 2.0;

[0142] Composite setting regulator (the setting accelerator and the setting retarder are mixed in a mass ratio of 0-2.0:0-1, wherein the setting accelerator is selected from one or more of calcium formate, aluminum sulfate, lithium carbonate, and lithium sulfate; the setting retarder is selected from one or more of sodium gluconate, citric acid, and tartaric acid): 20;

[0143] Volume stabilizer (yellow powder plastic expansion agent): 1.0;

[0144] Defoamer (organic silicon powder defoamer): 0.5;

[0145] Water: 300;

[0146] The raw materials of component B include:

[0147] Sulphoaluminate cement (rapid hardening sulphoaluminate cement grade 42.5): 800;

[0148] Admixture (fly ash): 200;

[0149] Water reducing agent (powdered polycarboxylic acid water reducing agent, water reducing rate greater than 35%): 6.0;

[0150] Viscosity modifier (hydroxypropyl methylcellulose): 0.1;

[0151] Composite flocculant (anionic polyacrylamide, xanthan gum and hydroxypropyl methylcellulose ether in a mass ratio of 2.0-5.0:0.5-1:1.0-4.0): 3.0;

[0152] Anti-underground water multi-ion coupling corrosion agent (composed of a mixture of synthetic magnesium aluminum hydrotalcite, calcined magnesium aluminum hydrotalcite and chloride ion adsorption resin in a mass ratio of 3.0-5.0:3.5-1:0.1-1.0): 0.2;

[0153] Composite setting regulator (accelerator and retarder are mixed in a mass ratio of 0-2.0:0-1, wherein the accelerator is selected from one or more of calcium formate, aluminum sulfate, lithium carbonate, and lithium sulfate; the retarder is selected from one or more of sodium gluconate, citric acid, and tartaric acid): 0.5;

[0154] Defoaming agent (yellow powder plastic expansion agent): 0.5;

[0155] Water: 300.

[0156] The preparation of the underwater cement-based double-liquid grouting material comprises the following steps:

[0157] (1) Mix the raw materials of component A and then mix them at a water-cement ratio of 0.3 to obtain slurry A with adjustable setting time;

[0158] (2) Mix the raw materials of component B and then mix them at a water-cement ratio of 0.3 to obtain a B slurry with adjustable setting time;

[0159] (3) The A slurry obtained in step (1) and step (2) and the corresponding B slurry are mixed in a mass ratio of 1:1 to obtain an underwater cement-based two-liquid grouting material 5.

[0160] Example 6

[0161] An underwater cement-based two-liquid grouting material comprises the following components A and B in terms of mass fraction:

[0162] A component raw materials include:

[0163] Portland cement (P·O42.5 grade): 800;

[0164] Admixture (mineral powder): 200;

[0165] Water reducing agent (powdered polycarboxylic acid water reducing agent, water reducing rate greater than 35%): 5.0;

[0166] Viscosity modifier (methyl cellulose): 0.1;

[0167] Composite flocculant (mass ratio of anionic polyacrylamide, xanthan gum and hydroxypropyl methylcellulose ether is 2.0-5.0: 0.5-1: 1.0-4.0): 2.0;

[0168] Composite setting regulator (mass ratio of accelerator to retarder is 0-2.0:0-1, the accelerator is selected from one or more of calcium formate, aluminum sulfate, lithium carbonate, and lithium sulfate; the retarder is selected from one or more of sodium gluconate, citric acid, and tartaric acid): 20;

[0169] Volume stabilizer (yellow powder plastic expansion agent): 1.0;

[0170] Defoamer (polyether powder defoamer): 0.5;

[0171] Water: 500;

[0172] The raw materials of component B include:

[0173] Sulphoaluminate cement (rapid hardening sulphoaluminate cement 42.5): 800;

[0174] Admixture (fly ash): 200;

[0175] Water reducing agent (powdered polycarboxylic acid water reducing agent, water reducing rate greater than 35%): 5.0;

[0176] Viscosity modifier (carboxymethyl cellulose): 0.1;

[0177] Composite flocculant (anionic polyacrylamide, xanthan gum and hydroxypropyl methylcellulose ether in a mass ratio of 2.0-5.0:0.5-1:1.0-4.0): 3.0;

[0178] Anti-underground water multi-ion coupling corrosion agent (composed of a mixture of synthetic magnesium aluminum hydrotalcite, calcined magnesium aluminum hydrotalcite and chloride ion adsorption resin in a mass ratio of 3.0-5.0:3.5-1:0.1-1.0): 0.2;

[0179] Composite setting regulator (accelerator and retarder are mixed in a mass ratio of 0-2.0:0-1, wherein the accelerator is selected from one or more of calcium formate, aluminum sulfate, lithium carbonate, and lithium sulfate; the retarder is selected from one or more of sodium gluconate, citric acid, and tartaric acid): 0.5;

[0180] Defoaming agent (yellow powder plastic expansion agent): 0.5;

[0181] Water: 500.

[0182] The preparation of the underwater cement-based double-liquid grouting material comprises the following steps:

[0183] (1) Mix the raw materials of component A and then mix them at a water-cement ratio of 0.5 to obtain slurry A with adjustable setting time;

[0184] (2) Mix the raw materials of component B and then mix them at a water-cement ratio of 0.5 to obtain a B slurry with adjustable setting time;

[0185] (3) The A slurry obtained in step (1) and step (2) and the corresponding B slurry are mixed in a mass ratio of 1:1 to obtain an underwater cement-based two-liquid grouting material 6.

[0186] Comparative Example 1

[0187] An underwater cement-based two-liquid grouting material comprises the following components A and B in terms of mass fraction:

[0188] A component raw materials include:

[0189] Portland cement (Portland cement P·O 42.5 grade): 900;

[0190] Admixture (mineral powder): 100;

[0191] Water reducing agent (powdered polycarboxylic acid water reducing agent, water reducing rate greater than 35%): 6.0;

[0192] Viscosity regulator (water-soluble polyvinyl alcohol): 0.1;

[0193] Composite flocculant (anionic polyacrylamide, xanthan gum and hydroxypropyl methylcellulose ether in a mass ratio of 2.0-5.0: 0.5-1: 1.0-4.0): 0;

[0194] Anti-underground water multi-ion coupling corrosion agent (composed of a mixture of synthetic magnesium aluminum hydrotalcite, calcined magnesium aluminum hydrotalcite and chloride ion adsorption resin in a mass ratio of 3.0-5.0:3.5-1:0.1-1.0): 0;

[0195] Composite setting regulator (the setting accelerator and the setting retarder are mixed in a mass ratio of 0-2.0:0-1, wherein the setting accelerator is selected from one or more of calcium formate, aluminum sulfate, lithium carbonate, and lithium sulfate; the setting retarder is selected from one or more of sodium gluconate, citric acid, and tartaric acid): 20;

[0196] Volume stabilizer (yellow powder plastic expansion agent): 1.0;

[0197] Defoamer (polyether powder defoamer): 0.5;

[0198] Water: 300;

[0199] The raw materials of component B include:

[0200] Sulphoaluminate cement (rapid hardening sulphoaluminate cement grade 42.5): 900;

[0201] Admixture (fly ash): 100;

[0202] Water reducing agent (powdered polycarboxylic acid water reducing agent, water reducing rate greater than 35%): 6.0;

[0203] Viscosity modifier (hydroxypropyl methylcellulose): 0.1;

[0204] Composite flocculant (anionic polyacrylamide, xanthan gum and hydroxypropyl methylcellulose ether in a mass ratio of 2.0-5.0: 0.5-1: 1.0-4.0): 0;

[0205] Composite setting regulator (accelerator and retarder are mixed in a mass ratio of 0-2.0:0-1, wherein the accelerator is selected from one or more of calcium formate, aluminum sulfate, lithium carbonate, and lithium sulfate; the retarder is selected from one or more of sodium gluconate, citric acid, and tartaric acid): 0.5;

[0206] Defoaming agent (yellow powder plastic expansion agent): 0.5;

[0207] Water: 300.

[0208] The preparation of the underwater cement-based double-liquid grouting material comprises the following steps:

[0209] (1) Mix the raw materials of component A and then mix them at a water-cement ratio of 0.3 to obtain slurry A with adjustable setting time;

[0210] (2) Mix the raw materials of component B and then mix them at a water-cement ratio of 0.3 to obtain a B slurry with adjustable setting time;

[0211] (3) The A slurry obtained in step (1) and step (2) and the corresponding B slurry are mixed in a mass ratio of 1:1 to obtain an underwater cement-based two-liquid grouting material 7.

[0212] Comparative Example 2

[0213] An underwater cement-based two-liquid grouting material comprises the following component A by mass, wherein the raw materials of component A include:

[0214] Portland cement (P·O42.5 grade): 800;

[0215] Admixture (mineral powder): 200;

[0216] Water reducing agent (powdered polycarboxylic acid water reducing agent, water reducing rate greater than 35%): 5.0;

[0217] Viscosity modifier (methyl cellulose): 0.1;

[0218] Composite flocculant (mass ratio of anionic polyacrylamide, xanthan gum and hydroxypropyl methylcellulose ether is 2.0-5.0: 0.5-1: 1.0-4.0): 4.0;

[0219] Composite setting regulator (mass ratio of accelerator to retarder is 0-2.0:0-1, the accelerator is selected from one or more of calcium formate, aluminum sulfate, lithium carbonate, and lithium sulfate; the retarder is selected from one or more of sodium gluconate, citric acid, and tartaric acid): 20;

[0220] Volume stabilizer (yellow powder plastic expansion agent): 1.0;

[0221] Defoamer (polyether powder defoamer): 0.5;

[0222] Water: 500;

[0223] The raw materials of component B include:

[0224] Portland cement (P·O42.5 grade): 800;

[0225] Admixture (fly ash): 200;

[0226] Water reducing agent (powdered polycarboxylic acid water reducing agent, water reducing rate greater than 35%): 5.0;

[0227] Viscosity modifier (carboxymethyl cellulose): 0.1;

[0228] Composite flocculant (anionic polyacrylamide, xanthan gum and hydroxypropyl methylcellulose ether in a mass ratio of 2.0-5.0:0.5-1:1.0-4.0): 3.0;

[0229] Anti-underground water multi-ion coupling corrosion agent (composed of a mixture of synthetic magnesium aluminum hydrotalcite, calcined magnesium aluminum hydrotalcite and chloride ion adsorption resin in a mass ratio of 3.0-5.0:3.5-1:0.1-1.0): 0.2.

[0230] Composite setting regulator (accelerator and retarder are mixed in a mass ratio of 0-2.0:0-1, wherein the accelerator is selected from one or more of calcium formate, aluminum sulfate, lithium carbonate, and lithium sulfate; the retarder is selected from one or more of sodium gluconate, citric acid, and tartaric acid): 0.5;

[0231] Defoaming agent (yellow powder plastic expansion agent): 0.5;

[0232] Water: 500.

[0233] The preparation of the underwater cement-based double-liquid grouting material comprises the following steps:

[0234] (1) Mix the raw materials of component A and then mix them at a water-cement ratio of 0.5 to obtain slurry A with adjustable setting time;

[0235] (2) Mix the raw materials of component B and then mix them at a water-cement ratio of 0.5 to obtain a B slurry with adjustable setting time;

[0236] (3) The A slurry obtained in step (1) and step (2) and the corresponding B slurry are mixed in a mass ratio of 1:1 to obtain an underwater cement-based two-liquid grouting material 8.

[0237] Application Example 1

[0238] Cement-based two-liquid grouting materials 1 to 8 obtained from Examples 1 to 6 and Comparative Examples 1 to 2 were selected for fresh slurry performance tests. Among them, the fluidity test was carried out according to the grouting material fluidity test (truncated cone fluidity method) method of Appendix A.0.2 of GB / T50448-2015. The greater the expansion of the slurry, the better the fluidity. The time for losing fluidity is based on the expansion reaching 150±10mm. The setting time was carried out according to GB / T1346-2011, and the initial setting and final setting times of the slurry were tested. The non-separability test in water was carried out according to the DL / T5117-2000 regulations. A certain amount of cement-based grouting material slurry was poured into a certain amount of water, and the pH value of the water and the content of suspended matter in the water were measured to judge the quality of its non-separability. When the slurry was poured into the water, the water was very clear, the pH value was ≤9, and the content of suspended matter was ≤80mg / L, that is, the non-separability was excellent; otherwise, it was considered to be poor in non-separability. The test results are shown in Table 1.

[0239] Table 1 Physical properties of fresh grouting materials with different proportions

[0240]

[0241]

[0242] It can be seen from the results in Table 1 that the setting time of the grouting material 7 of comparative example 1 in the air is normal; however, when in water, because no composite flocculant is added, the slurry is diluted by water after being poured into the water, resulting in the pH value of the water exceeding 12, and the suspended matter content is as high as 406 mg / L, which is much higher than the suspended matter content of the materials 1 to 6 in the examples in water, and the non-separation in water is very poor and the setting time is abnormal; the grouting material 8 of comparative example 2 uses ordinary silicate cement, and the setting time is too long, which cannot meet the requirements of fast-hardening ultra-early-strength grouting materials. The grouting materials 1 to 6 in the examples 1 to 6 are superior in fluidity, setting time and non-separation in water, and can meet the requirements of underwater non-dispersible fast-hardening ultra-early-strength grouting under water conditions.

[0243] Application Example 2

[0244] Cement-based two-liquid grouting materials 1 to 8 obtained in Examples 1 to 6 and Comparative Examples 1 to 2 were selected for hardened slurry performance testing. The bonding strength was tested according to the method specified in JGJ / T 70-2009; the compressive strength and the water-land compressive strength ratio were tested according to the provisions of GB / T 17671-2021. The specimen size was 40 mm × 40 mm × 160 mm, and they were cured in air and water, respectively.

[0245] Table 2 Properties of hardened slurry of grouting materials with different proportions

[0246]

[0247]

[0248] It can be seen from the results in Table 2 that the grouting material 7 of comparative example 1 is not mixed with a composite flocculant, and the bonding strength of the test block 14d formed and cured in the air is 1.23MPa, which is slightly lower than the bonding strength of the grouting materials 1 to 6 of embodiments, which is 1.65MPa to 2.12MPa, and the compressive strength at each age is higher than the compressive strength of the grouting materials 1 to 6 of embodiments in the air; while during forming and curing in water, the slurry is diluted by water washing during forming, and the water-to-material ratio is magnified many times, resulting in too low compressive strength, and the 7d and 28d water-to-land compressive strength ratios are 19.5% and 28.2% respectively, which are much lower than the 7d and 28d water-to-land compressive strength ratios of the grouting materials 1 to 6 of embodiments; the grouting material 8 of comparative example 2 contains only ordinary Portland cement without the addition of sulphoaluminate cement, and has low early hourly strength, which cannot meet the requirements of fast-hardening and ultra-early strength grouting. The grouting materials 1 to 6 in Examples 1 to 6 are superior in terms of bonding strength, compressive strength at various ages, and water-to-land compressive strength ratio, and can meet the requirements of underwater non-dispersive rapid grouting under water conditions.

[0249] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An underwater cement-based two-liquid grouting material, characterized in that: The grouting material comprises a component A raw material and a component B raw material; wherein, The raw materials of component A include the following components by mass: 80-95 parts of silicate cement, 5-20 parts of admixture, 0.2-1 parts of water reducing agent, 0.01-0.05 parts of viscosity modifier, 0.2-0.5 parts of composite flocculant, 1.5-2.5 parts of composite coagulant, 0.05-0.15 parts of volume stabilizer, 0.05-0.15 parts of defoamer, and 30-60 parts of water; The raw materials of component B are as follows, calculated by mass: 80-95 parts of sulphoaluminate cement, 5-20 parts of admixture, 0.2-1 part of water reducer, 0.01-0.05 part of viscosity regulator, 0.2-0.5 part of composite flocculant, 0-2 parts of anti-groundwater multi-ion coupling corrosion agent, 0-0.5 parts of composite coagulant, 0.05-0.15 parts of defoamer and 30-60 parts of water.

2. The grouting material according to claim 1, characterized in that: The silicate cement is of P·O 42.5 grade or 52.5 grade, and the sulphoaluminate cement is of rapid hardening sulphoaluminate cement of 42.5 grade or 52.5 grade.

3. The grouting material according to claim 1, characterized in that: The admixture is selected from at least one of mineral powder and pulverized coal.

4. The grouting material according to claim 1, characterized in that: The water reducing agent is a powder polycarboxylic acid water reducing agent, and the water reducing rate is greater than 35%.

5. The grouting material according to claim 1, characterized in that: The viscosity modifier is selected from one or more of methyl cellulose, carboxymethyl cellulose, hydroxypropyl methyl cellulose and water-soluble polyvinyl alcohol.

6. The grouting material according to claim 1, characterized in that: The composite flocculant is composed of anionic polyacrylamide, xanthan gum and hydroxypropyl methylcellulose ether mixed in a mass ratio of 2.0-5.0:0.5-1:1.0-4.0; The composite setting regulator is composed of a mixture of a setting accelerator and a setting retarder in a mass ratio of 0.01-2.0:0.01-1, wherein the setting accelerator is selected from one or more of calcium formate, aluminum sulfate, lithium carbonate, and lithium sulfate; and the setting retarder is selected from one or more of sodium gluconate, citric acid, and tartaric acid.

7. The grouting material according to claim 1, characterized in that: The anti-underground water multi-ion coupling corrosion agent is composed of synthetic magnesium aluminum hydrotalcite, calcined magnesium aluminum hydrotalcite and chloride ion adsorption resin in a mass ratio of 3.0-5.0:3.5-1:0.1-1.

0.

8. The grouting material according to claim 1, characterized in that: The volume stabilizer is one or both of a plastic expansion agent and a calcium-magnesium composite expansion agent.

9. The grouting material according to claim 1, characterized in that: The defoamer is a polyether powder defoamer or an organosilicon powder defoamer.

10. The method for preparing the grouting material according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: (1) Mix the components in the raw material of component A, add water at a water-cement ratio of 0.3 to 0.6 and stir evenly to obtain slurry A with an adjustable setting time of 30 minutes to 2 hours; (2) Mix the components in the B component raw material, add water at a water-cement ratio of 0.3 to 0.6 and stir evenly to obtain a B slurry with an adjustable setting time of 30 minutes to 2 hours; (3) Mix slurry A and slurry B in a mass ratio of 1:1 and perform grouting construction using a special dual-liquid grouting pump.

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