CN108863147B - Grouting material additive and application thereof - Google Patents
Grouting material additive and application thereof Download PDFInfo
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- CN108863147B CN108863147B CN201810834041.9A CN201810834041A CN108863147B CN 108863147 B CN108863147 B CN 108863147B CN 201810834041 A CN201810834041 A CN 201810834041A CN 108863147 B CN108863147 B CN 108863147B
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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
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- C—CHEMISTRY; METALLURGY
- 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
- C09K8/467—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 containing additives for specific purposes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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Abstract
The invention provides a grouting material additive and application thereof. The grouting material additive provided by the invention comprises the following components in parts by weight: 370-670 parts of superfine cement clinker; 0.25-0.55 parts of lithium carbonate; 0.5-1 part of borax; 5-15 parts of polyacrylamide; 20-40 parts of a polycarboxylic acid water reducing agent; 2-5 parts of hydroxyethyl cellulose ether; the specific surface area of the superfine cement clinker is 700-900 cm2(ii) in terms of/g. When the grouting material additive provided by the invention is added into slurry, the initial setting time can reach 15 minutes, the final setting time is 50 seconds, the rapid plugging can be realized, and the grouting material additive has good plugging and reinforcing functions after being cured.
Description
Technical Field
The invention relates to the technical field of grouting materials in building materials, in particular to a grouting material additive and application thereof.
Background
With the rapid development of economy in China, the scale of traffic and water conservancy construction (such as high-speed rails, subways, highways and dams) is larger and larger. The geological conditions of China with broad breadth and changeable landform are complex; the complex geological conditions make underground engineering and water conservancy engineering increasingly receive attention from people. As high-speed rails, subways and dams are continuously increased, and underground traffic hydraulic engineering conditions are increasingly complex, the problems of collapse, water inrush, mud gushing and the like are gradually developed. In order to solve the problems, grouting technology is adopted to reinforce and plug underground engineering and hydraulic engineering.
The grouting technology is to prepare a material with filling and cementing properties into slurry, and inject the slurry into a body to be injected by using a proper pressurized grouting device, such as cracks, pores or holes of a stratum, so that the slurry permeates and fills, and is coagulated and hardened, thereby achieving the purpose of reinforcement or plugging. Therefore, grouting materials are key to ensure the reinforcement and plugging of underground and hydraulic engineering. However, the existing grouting material also has the problems of slow hydration reaction speed, incapability of realizing quick plugging and poor reinforcing and plugging effects.
Disclosure of Invention
The grouting material additive provided by the invention is added into slurry, the initial setting time can reach 15 minutes, the final setting time is 50 seconds, the rapid plugging can be realized, and the grouting material additive has good plugging and reinforcing functions after curing.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a grouting material additive which comprises the following components in parts by weight:
the specific surface area of the superfine cement clinker is 700-900 cm2/g。
Preferably, the method comprises the following steps:
preferably, the method further comprises the following steps:
150-300 parts of beta hemihydrate gypsum;
1-2 parts of aluminum citrate;
and 2-5 parts of sodium aluminate.
Preferably, the method further comprises the following steps:
6-8 parts of sodium polyacrylate.
Preferably, the method comprises the following steps:
preferably, the superfine cement clinker is superfine sulphoaluminate cement clinker or superfine aluminoferrite cement clinker.
Preferably, the molecular weight of the polyacrylamide is 800 to 2000 ten thousand.
The invention also provides the application of the grouting material additive in the technical scheme in foundation seepage prevention reinforcement or foundation seepage prevention reinforcement.
The invention also provides the application of the grouting material additive in the technical scheme in the reinforcing and plugging of the subway shield quicksand geological formation or the subway shield silt geological formation.
The invention also provides the application of the grouting material additive in the technical scheme in foundation pit sand gushing or foundation pit water gushing plugging.
The invention provides a grouting material additive which comprises the following components in parts by weight: 370-670 parts of superfine cement clinker; 0.25-0.55 parts of lithium carbonate; 0.5-1 part of borax; 5-15 parts of polyacrylamide; 20-40 parts of a polycarboxylic acid water reducing agent; 2-5 parts of hydroxyethyl cellulose ether; the specific surface area of the superfine cement clinker is 700-900 cm2(ii) in terms of/g. The superfine cement clinker in the grouting material additive provided by the invention has great surface activity, and can quickly generate hydration reaction with the slurry after being added into the slurry together with lithium carbonate, borax, polyacrylamide, polycarboxylic acid water reducing agent and hydroxyethyl cellulose ether, so that quick plugging is realized. The results of the examples show that when the grouting material additive is added into slurry, the initial setting time can reach 15 minutes, and the final setting time is 50 seconds (the initial setting refers to the condition that the slurry loses plasticity from the beginning of adding water to the slurry, and the final setting refers to the condition that the slurry loses plasticity from the beginning to the complete loss of plasticity), and the grouting material additive has good plugging and reinforcing functions after being cured.
Drawings
FIGS. 1-2 are diagrams illustrating water gushing of a fault dug at a high speed from Yonglong to 400 m;
FIGS. 3 to 4 are graphs showing the effect of the grouting material additive of example 5 after being used for plugging a fault water inrush area of Yonglong high-speed 400 m.
Detailed Description
The invention provides a grouting material additive which comprises the following components in parts by weight:
the specific surface area of the superfine cement clinker is 700-900 cm2/g。
The grouting material additive comprises 370-670 parts by weight of superfine cement clinker, preferably 400-670 parts by weight, and more preferably 670 parts by weight. In the invention, the specific surface area of the superfine cement clinker is 700-900 cm2G, preferably 800cm2(ii) in terms of/g. The superfine cement clinker has larger surface activity, can quickly generate hydration reaction with a grouting material, and is further favorable for realizing quick plugging and reinforcement.
In the invention, the superfine cement clinker is preferably formed by superfine grinding of raw material cement clinker; the invention has no special requirements on the implementation mode of the superfine mill, and the superfine mill implementation mode which is well known by the technical personnel in the field can be adopted; the cement clinker is preferably a sulphoaluminate cement clinker or an aluminoferrite cement clinker. The invention has no special requirements on the chemical composition and mineral composition of the sulphoaluminate cement clinker or the ferro-aluminate cement clinker, and the chemical composition and mineral composition of the sulphoaluminate cement clinker or the ferro-aluminate cement clinker well known to the technical personnel in the field can be adopted. In the invention, the superfine sulphoaluminate cement clinker or the superfine ferroaluminate cement clinker has the characteristics of high early strength, quick coagulation and good freezing resistance, and after the superfine sulphoaluminate cement clinker or the superfine ferroaluminate cement clinker is compounded with ordinary portland cement or slurry, hydration reaction can be quickly carried out under the action of water to generate ettringite, namely calcium sulphoaluminate concretion body; the content of alumina in the superfine sulphoaluminate cement clinker or the superfine ferro-aluminate cement clinker is higher, and aluminum ions can generate cross-linking reaction with organic polymers in the components to form a stable molecular structure, so that the cementation effect among particles is improved, and the performance of a grouting material is improved.
Based on the weight parts of the superfine cement clinker, the grouting material additive provided by the invention comprises 0.25-0.55 parts of lithium carbonate, preferably 0.3-0.55 parts, and more preferably 0.55 parts. The source of lithium carbonate used in the present invention is not particularly limited and may be any source known to those skilled in the art, such as commercially available lithium carbonate. The lithium carbonate is used as the coagulation regulating early strength agent of the superfine cement clinker, has obvious early strength effect and does not influence the improvement of later strength.
Based on the weight parts of the superfine cement clinker, the grouting material additive provided by the invention comprises 0.5-1 part of borax, preferably 0.7-1 part, and more preferably 1 part. The source of the borax is not particularly required in the invention, and the source of the borax known to those skilled in the art can be adopted, such as the commercial borax. The borax of the invention can adjust the setting time of the superfine cement clinker to meet the construction performance.
Based on the weight parts of the superfine cement clinker, the grouting material additive provided by the invention comprises 5-15 parts of polyacrylamide, preferably 5-10 parts, and more preferably 10 parts. In the present invention, the molecular weight of the polyacrylamide is preferably 800 to 2000 ten thousand, and more preferably 1000 to 1500 ten thousand. The source of the polyacrylamide is not particularly required in the present invention, and any polyacrylamide known to those skilled in the art, such as commercially available polyacrylamide, can be used. The polyacrylamide molecular chain and the grouting material are drawn together through various mechanical, physical and chemical actions to form a net shape, so that the strength of the stone body is improved, and the plugging or reinforcing effect is further improved.
Based on the weight parts of the superfine cement clinker, the grouting material additive provided by the invention comprises 20-40 parts of polycarboxylic acid water reducing agent, preferably 25-30 parts, and more preferably 30 parts. The source of the polycarboxylate water reducer is not particularly required in the invention, and the source of the polycarboxylate water reducer known to those skilled in the art can be adopted, such as a commercially available polycarboxylate water reducer. According to the invention, the polycarboxylic acid water reducing agent is taken as a dispersing agent, so that the fluidity of the grouting material can be improved, and water loss and secondary pollution can be prevented; in addition, the polycarboxylate superplasticizer can improve surface tension, so that the surface tension is lower, the permeability is higher, and the durability of the grouting material is improved.
Based on the weight parts of the superfine cement clinker, the grouting material additive provided by the invention comprises 2-5 parts of hydroxyethyl cellulose ether, preferably 3-5 parts, and more preferably 5 parts. In the present invention, the viscosity of the hydroxyethyl cellulose ether is preferably 40000mpa.s or less, more preferably 35000mpa.s or less, and still more preferably 10000 to 15000 mpa.s. The source of the hydroxyethyl cellulose ether is not particularly required in the present invention, and those known to those skilled in the art can be used. The hydroxyethyl cellulose ether can ensure that the grouting material can be smoothly injected into the ground through the grouting pipe.
Based on the weight parts of the superfine cement clinker, the grouting material additive provided by the invention preferably further comprises 150-300 parts of beta hemihydrate gypsum, preferably 200-300 parts, and more preferably 300 parts. The source of the beta hemihydrate gypsum is not particularly required in the present invention, and any source of beta hemihydrate gypsum known to those skilled in the art may be used, such as commercially available building gypsum. The beta hemihydrate gypsum is used as an accelerator, can accelerate the setting time of the grouting material, well solidifies harmful substances and promotes the hydration of the superfine cement clinker; meanwhile, the borax is used as a retarder of the beta hemihydrate gypsum to prevent the beta hemihydrate gypsum from being too fast to be constructed.
The grouting material additive provided by the invention preferably further comprises 1-2 parts of aluminum citrate, preferably 1-1.5 parts of aluminum citrate, and more preferably 1 part of aluminum citrate, based on the weight parts of the superfine cement clinker. The source of the aluminum citrate is not particularly required in the present invention, and a source of aluminum citrate known to those skilled in the art may be used. The aluminum citrate is a cross-linking agent of polyacrylamide, and the polyacrylamide can be cross-linked to form water-insoluble gel under the action of the cross-linking agent of the aluminum citrate, so that an inorganic stone-forming body is consolidated, and the plugging or reinforcing effect is improved.
Based on the weight parts of the superfine cement clinker, the grouting material additive provided by the invention preferably further comprises 2-5 parts of sodium aluminate, preferably 3-5 parts, and more preferably 5 parts. The source of the sodium aluminate in the invention has no special requirement, and the source of the sodium aluminate known to those skilled in the art can be adopted, such as the commercially available sodium aluminate. The sodium aluminate of the invention is an accelerator for ordinary portland cement in grouting materials, and can provide sufficient aluminum ions for beta hemihydrate gypsum to form calcium sulphoaluminate concretes.
Based on the weight parts of the superfine cement clinker, the grouting material additive provided by the invention preferably further comprises 6-8 parts of sodium polyacrylate, preferably 7-8 parts, and more preferably 8 parts. In the present invention, the molecular weight of the sodium polyacrylate is preferably 10000 or more, more preferably 15000 or more, and still more preferably 20000 to 30000. The source of the sodium polyacrylate is not particularly required in the invention, and the sodium polyacrylate known to those skilled in the art can be used, such as commercially available sodium polyacrylate. The sodium polyacrylate of the invention can absorb water with several times of the volume of the sodium polyacrylate without precipitation, can increase the viscosity of slurry under the synergistic action of other components, and is combined with inorganic materials through chemical bonds to form an organic-inorganic interpenetrating network structure to become a tough stone body with strength.
The preparation method of the grouting material additive does not have any special requirement, and a preparation mode of the composition which is well known by a person skilled in the art is adopted; in the embodiment of the invention, the raw material components can be directly and uniformly mixed.
The invention also provides an application of the grouting material additive in the technical scheme in foundation seepage prevention reinforcement or foundation seepage prevention reinforcement. In the present invention, the application preferably comprises: directly adding the grouting material additive into a grouting material to obtain a grouting mixed material; and injecting the grouting mixed material into an area needing seepage prevention or reinforcement treatment through grouting equipment, and standing. In the present invention, the grouting material preferably comprises a normal silicate cement slurry or slurry; the invention has no special requirements on the source of the ordinary silicate cement paste and the slurry, and the ordinary silicate cement paste and the slurry which are well known by the technical personnel in the field can be adopted. The invention has no special requirement on the standing time, and can realize the effect of complete solidification; in the standing process, the grouting material additive promotes the solidification of the grouting material, and the reinforcing and plugging of a permeable area are realized.
In the invention, the grouting material additive comprises the following components in parts by weight: 370-670 parts of superfine cement clinker, 0.25-0.55 part of lithium carbonate, 0.5-1 part of borax, 5-15 parts of polyacrylamide, 20-40 parts of polycarboxylic acid water reducer and 2-5 parts of hydroxyethyl cellulose ether, and further preferably comprises 670 parts of superfine cement clinker, 0.55 part of lithium carbonate, 1 part of borax, 10 parts of polyacrylamide, 30 parts of polycarboxylic acid water reducer and 5 parts of hydroxyethyl cellulose ether. In the invention, the specific surface area of the superfine cement clinker is 700-900 cm2(ii) in terms of/g. In the invention, each component in the grouting material additive is consistent with that in the grouting material additive technical scheme, and is not described herein again.
In the invention, when the grouting material is ordinary silicate cement paste, the addition amount of the grouting material additive is preferably 5-15% of the mass of the cement paste, and more preferably 10%; when the grouting material is slurry, the addition amount of the grouting material additive is preferably 8-15% of the mass of the slurry, more preferably 10-15%, and even more preferably 15%.
The invention also provides an application of the grouting material additive in the technical scheme in the reinforcing and plugging of the subway shield quicksand geological formation or the subway shield silt geological formation. In the present invention, the application preferably comprises: directly adding the grouting material additive into a grouting material to obtain a grouting mixed material; and (3) injecting the grouting mixed material into a target area through grouting equipment and then standing. In the present invention, the grouting material is preferably ordinary silicate cement paste or slurry; the invention has no special requirements on the source of the ordinary silicate cement paste and the slurry, and the ordinary silicate cement paste and the slurry which are well known by the technical personnel in the field can be adopted. The invention has no special requirement on the standing time, and can realize the effect of complete solidification; in the standing process, the grouting material additive promotes the solidification of the grouting material, so that the geological formation is reinforced and blocked.
In the invention, the grouting material additive comprises the following components in parts by weight: 370-670 parts of superfine cement clinker, 0.25-0.55 part of lithium carbonate, 0.5-1 part of borax, 5-15 parts of polyacrylamide, 20-40 parts of polycarboxylate superplasticizer, 2-5 parts of hydroxyethyl cellulose ether, 150-300 parts of beta semi-hydrated gypsum, 1-2 parts of aluminum citrate and 2-5 parts of sodium aluminate. In the invention, the specific surface area of the superfine cement clinker is 700-900 cm2(ii) in terms of/g. In the invention, each component in the grouting material additive is consistent with that in the grouting material additive technical scheme, and is not described herein again.
In the invention, when the grouting material is ordinary silicate cement paste, the addition amount of the grouting material additive is preferably 5-15% of the mass of the cement paste, and more preferably 10%; when the grouting material is slurry, the addition amount of the grouting material additive is preferably 8-15% of the mass of the slurry, more preferably 10-15%, and even more preferably 15%.
The invention also provides an application of the grouting material additive in the technical scheme in foundation pit sand gushing or foundation pit water gushing plugging. In the present invention, the application preferably comprises: directly adding the grouting material additive into a grouting material to obtain a grouting mixed material; and injecting the grouting mixed material into a sand gushing or water gushing area of a foundation pit through grouting equipment, and standing. In the present invention, the grouting material is preferably ordinary silicate cement paste or slurry; the invention has no special requirements on the source of the ordinary silicate cement paste and the slurry, and the ordinary silicate cement paste and the slurry which are well known by the technical personnel in the field can be adopted. The invention has no special requirement on the standing time, and can realize the effect of complete solidification; in the standing process, the grouting material additive promotes the solidification of the grouting material, and the reinforcement and plugging of a sand gushing area or a water gushing area are realized.
In bookIn the invention, the grouting material additive comprises the following components in parts by weight: 370-670 parts of superfine cement clinker, 0.25-0.55 part of lithium carbonate, 0.5-1 part of borax, 5-15 parts of polyacrylamide, 20-40 parts of polycarboxylate water reducer, 2-5 parts of hydroxyethyl cellulose ether, 150-300 parts of beta semi-hydrated gypsum, 1-2 parts of aluminum citrate, 2-5 parts of sodium aluminate and 6-8 parts of sodium polyacrylate, and further preferably comprises 670 parts of superfine cement clinker, 0.55 part of lithium carbonate, 1 part of borax, 10 parts of polyacrylamide, 30 parts of polycarboxylate water reducer, 5 parts of hydroxyethyl cellulose ether, 300 parts of beta semi-hydrated gypsum, 1 part of aluminum citrate, 5 parts of sodium aluminate and 8 parts of sodium polyacrylate. In the invention, the specific surface area of the superfine cement clinker is 700-900 cm2(ii) in terms of/g. In the invention, each component in the grouting material additive is consistent with that in the grouting material additive technical scheme, and is not described herein again.
In the invention, when the grouting material is ordinary silicate cement paste, the addition amount of the grouting material additive is preferably 5-15% of the mass of the cement paste, and more preferably 10%; when the grouting material is slurry, the addition amount of the grouting material additive is preferably 8-15% of the mass of the slurry, more preferably 10-15%, and even more preferably 15%.
The following examples are provided to illustrate the grouting material additive and its application, but they should not be construed as limiting the scope of the present invention.
Example 1
The self-purchased sulphoaluminate cement clinker is subjected to superfine grinding to ensure that the surface area reaches 900cm2Obtaining superfine sulphoaluminate cement clinker;
according to the weight parts, 400 parts of superfine cement clinker, 0.25 part of lithium carbonate, 0.6 part of borax, 12 parts of polyacrylamide with the molecular weight of 800 ten thousand, 25 parts of polycarboxylic acid water reducing agent and 2 parts of hydroxyethyl cellulose ether with the viscosity of 40000mpa.s are sequentially added into a gong-rod stirrer to be stirred for 3min, and the grouting material additive is obtained for later use.
Adding the obtained grouting material additive into common silicate cement slurry for performance test, wherein when the addition amount of the grouting material additive is 5% of the mass of the cement slurry, the initial setting time is 60 minutes, and the curing time is 25 minutes; when the dosage of the grouting material additive is 10 percent of the mass of the cement paste, the initial setting time is 45 minutes, and the final setting time is 20 minutes; when the additive accounts for 15 percent of the mass of cement paste, the initial setting time is 35 minutes, and the final setting time is 15 minutes.
Example 2
The self-purchased sulphoaluminate cement clinker is subjected to superfine grinding to ensure that the surface area reaches 800cm2Obtaining superfine sulphoaluminate cement clinker;
according to the weight portion, 600 portions of superfine cement clinker, 0.55 portion of lithium carbonate, 1 portion of borax, 10 portions of polyacrylamide with molecular weight of 2000 ten thousand, 30 portions of polycarboxylic acid water reducing agent and 5 portions of hydroxyethyl cellulose ether with viscosity of less than 40000mpa.s are mixed; adding a gong-bar stirrer in sequence, and stirring for 3min to obtain the grouting material additive for later use.
Adding the obtained grouting material additive into common silicate cement slurry for performance test, wherein when the grouting material additive accounts for 5% of the mass of the cement slurry, the initial setting time is 60 minutes, and the curing time is 25 minutes; when the additive accounts for 10 percent of the mass of cement paste, the initial setting time is 45 minutes, and the final setting time is 20 minutes; when the additive accounts for 15 percent of the mass of cement paste, the initial setting time is 35 minutes, and the final setting time is 15 minutes.
Example 3
The self-purchased sulphoaluminate cement clinker is subjected to superfine grinding to ensure that the surface area reaches 700cm2Obtaining superfine sulphoaluminate cement clinker;
670 parts of superfine cement clinker, 0.3 part of lithium carbonate, 0.8 part of borax, 5 parts of polyacrylamide with the molecular weight of 1000 ten thousand, 20 parts of polycarboxylic acid water reducing agent, 3 parts of hydroxyethyl cellulose ether with the viscosity of less than 40000mpa.s and 200 parts of beta hemihydrate gypsum; 1 part of aluminum citrate; 3 parts of sodium aluminate; adding a gong-bar stirrer in sequence, and stirring for 3min to obtain the grouting material additive for later use.
Adding the obtained grouting material additive into common silicate cement slurry for performance test, wherein when the grouting material additive accounts for 5% of the mass of the cement slurry, the initial setting time is 35 minutes, and the curing time is 20 minutes; when the additive accounts for 10 percent of the mass of cement paste, the initial setting time is 25 minutes, and the final setting time is 15 minutes; when the additive accounts for 15% of the mass of cement paste, the initial setting time is 15 minutes, and the final setting time is 10 minutes.
Example 4
The self-purchased sulphoaluminate cement clinker is subjected to superfine grinding to ensure that the surface area reaches 900cm2Obtaining superfine sulphoaluminate cement clinker;
according to the weight parts, 500 parts of superfine cement clinker, 0.5 part of lithium carbonate, 0.5 part of borax, 8 parts of polyacrylamide with the molecular weight of 1500 ten thousand, 35 parts of polycarboxylic acid water reducing agent, 4 parts of hydroxyethyl cellulose ether with the viscosity of below 40000mpa.s, 150 parts of beta semi-hydrated gypsum, 1.5 parts of aluminum citrate, 2 parts of sodium aluminate and 7 parts of sodium polyacrylate with the molecular weight of more than 10000 are sequentially added into a screw stirrer to be stirred for 3min, and the grouting material additive is obtained for later use.
Adding the obtained grouting material additive into common silicate cement slurry for performance test, wherein when the grouting material additive accounts for 5% of the mass of the cement slurry, the initial setting time is 25 minutes, and the curing time is 2 minutes; when the additive accounts for 10% of the mass of cement paste, the initial setting time is 15 minutes, and the final setting time is 50 seconds; when the additive accounts for 15% of the mass of cement paste, the initial setting time is 8 minutes, and the final setting time is 35 seconds.
Example 5
The self-purchased iron aluminate cement clinker is subjected to superfine grinding to ensure that the surface area reaches 800cm2Obtaining superfine iron aluminate cement clinker;
670 parts of superfine cement clinker; 0.55 part of lithium carbonate; 1 part of borax; 10 parts of polyacrylamide with the molecular weight of 1300 ten thousand; 30 parts of a polycarboxylic acid water reducing agent; 5 parts of hydroxyethyl cellulose ether with the viscosity of 40000mpa.s or less; 300 parts of beta hemihydrate gypsum; 1 part of aluminum citrate; 5 parts of sodium aluminate; and 8 parts of sodium polyacrylate with the molecular weight of more than 10000 is sequentially added into a screw stirrer to be stirred for 3min, and the grouting material additive is obtained for later use.
Adding the obtained grouting material additive into common silicate cement slurry for performance test, wherein when the grouting material additive accounts for 5% of the mass of the cement slurry, the initial setting time is 25 minutes, and the curing time is 2 minutes; when the additive accounts for 10% of the mass of cement paste, the initial setting time is 15 minutes, and the final setting time is 50 seconds; when the additive accounts for 15% of the mass of cement paste, the initial setting time is 8 minutes, and the final setting time is 35 seconds.
The water burst of the tunnel of the Yonglong high-speed dam reaches more than 100 cubic meters per minute, the standby grouting material additive is added into the ordinary Portland cement according to 10 percent and is injected into a water burst area through grouting equipment, and the leakage can be completely stopped in three hours.
The embodiment shows that the grouting material additive provided by the invention comprises the following components in parts by weight: 370-670 parts of superfine cement clinker; 0.25-0.55 parts of lithium carbonate; 0.5-1 part of borax; 5-15 parts of polyacrylamide; 20-40 parts of a polycarboxylic acid water reducing agent; 2-5 parts of hydroxyethyl cellulose ether; the specific surface area of the superfine cement clinker is 700-900 cm2(ii) in terms of/g. When the grouting material additive provided by the invention is added into slurry, the initial setting time can reach 15 minutes, the final setting time is 50 seconds, the rapid plugging can be realized, and the grouting material additive has good plugging and reinforcing functions after curing.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. The grouting material additive comprises the following components in parts by weight:
370-670 parts of superfine cement clinker;
0.25-0.55 parts of lithium carbonate;
0.5-1 part of borax;
5-15 parts of polyacrylamide;
20-40 parts of a polycarboxylic acid water reducing agent;
2-5 parts of hydroxyethyl cellulose ether;
150-300 parts of beta hemihydrate gypsum;
1-2 parts of aluminum citrate;
2-5 parts of sodium aluminate;
the specific surface area of the superfine cement clinker is 700-900 cm2/g；
The superfine cement clinker is sulphoaluminate cement clinker or ferroaluminate cement clinker.
2. The grouting material additive of claim 1, further comprising:
6-8 parts of sodium polyacrylate.
3. The grouting material additive of claim 2, wherein the components comprise:
670 parts of superfine cement clinker;
0.55 part of lithium carbonate;
1 part of borax;
10 parts of polyacrylamide;
40 parts of a polycarboxylic acid water reducing agent;
5 parts of hydroxyethyl cellulose ether;
300 parts of beta hemihydrate gypsum;
1 part of aluminum citrate;
5 parts of sodium aluminate;
8 parts of sodium polyacrylate.
4. The grouting material additive as claimed in any one of claims 1 to 3, wherein the polyacrylamide has a molecular weight of 800 to 2000 ten thousand.
5. The use of the grouting material additive of claim 1 or 4 for reinforcement and plugging of subway shield quicksand geological formations or subway shield muddy formations.
6. The grouting material additive as claimed in any one of claims 2 to 4 is applied to foundation pit sand gushing or foundation pit water gushing plugging.
Priority Applications (1)
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| CN113089640A (en) * | 2021-03-26 | 2021-07-09 | 广东睿博建筑设计研究有限公司 | Foundation treatment method |
| CN114991701A (en) * | 2022-05-17 | 2022-09-02 | 湖北道泽勘测设计院有限公司 | Method for plugging drilled hole by adopting cement paste and water glass mixed solution |
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| JPH01289890A (en) * | 1988-05-16 | 1989-11-21 | Chichibu Cement Co Ltd | Rapidly curable foundation improver |
| CN100360457C (en) * | 2005-06-08 | 2008-01-09 | 张振秋 | Cement-base dual-liquid slip-casting material |
| CN102173730B (en) * | 2011-01-21 | 2013-03-06 | 煤炭科学研究总院 | High-moisture filling material and preparation method thereof |
| CN102503324B (en) * | 2011-11-22 | 2014-07-09 | 中建材中岩科技有限公司 | Anchoring grouting material as well as preparation method and application thereof |
| CN102815917B (en) * | 2012-09-06 | 2014-02-26 | 焦作市新筑王材料科技有限公司 | Gas extraction hole sealing material |
| CN107721334B (en) * | 2017-11-16 | 2020-06-02 | 重庆建工住宅建设有限公司 | Emergency automatic plugging material |
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