CN111807794A - Low-temperature sleeve grouting material and preparation method thereof - Google Patents
Low-temperature sleeve grouting material and preparation method thereof Download PDFInfo
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- CN111807794A CN111807794A CN202010662365.6A CN202010662365A CN111807794A CN 111807794 A CN111807794 A CN 111807794A CN 202010662365 A CN202010662365 A CN 202010662365A CN 111807794 A CN111807794 A CN 111807794A
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Classifications
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
Abstract
The invention provides a low-temperature sleeve grouting material and a preparation method thereof, the grouting material has high fluidity and good construction performance, can be self-maintained and leveled, has long operation time, and has a smooth and flat surface after completion. The low-temperature sleeve grouting material comprises a cementing material, aggregate and an additive; the cementing material comprises the following raw materials: P.O 42.5 portland cement, high alumina cement, sulphoaluminate cement, mineral admixture: the fly ash, mineral powder and silica fume aggregate comprise the following raw materials in parts by weight: 20-40 mesh quartz sand: 40-50 parts of dried sand with 40-70 meshes: 30-40 parts of dried sand with 70-120 meshes: 30-40 parts of an additive, wherein the additive comprises the following raw materials in parts by weight: 0.5-1 part of water reducing agent, retarder: 0.1-0.2 parts of coagulant: 0.05-0.2 part of an antifreezing agent: 0.5-1.5 parts of defoaming agent: 0.005-0.01 portion.
Description
Technical Field
The invention relates to a sleeve grouting material and a preparation method thereof, in particular to a low-temperature sleeve grouting material and a preparation method thereof, and belongs to the technical field of building materials.
Background
Patent 1 (publication number CN110698151A) discloses a preparation method of an assembly type construction steel bar sleeve grouting material, which uses cement, fine aggregate, micro silicon powder, semi-hydrated gypsum, an expanding agent, thickening powder, tackifying powder, a water reducing agent, a defoaming agent and a retarder in certain mass fraction to prepare the sleeve grouting material. The obtained grouting material has good mechanical property, strong bonding force with reinforcing steel bars and stable performance.
Patent 2 (publication No. CN110423072A) discloses a method for preparing a sleeve grouting material constructed in a-10 ℃ environment, which is characterized in that a freezing point reducing component, a heating component and a phase change heat storage component are added to prepare the sleeve grouting material on the basis of conventional grouting material components such as cement, fine powder, coarse aggregate, a composite expanding agent, a water reducing agent, a defoaming agent, a retarder and an early strength agent. The grouting material obtained by production can meet various construction performances at the temperature of minus 10 ℃.
The defects of the technology are as follows: patent 1 uses conventional grouting material, adds different admixtures and produces sleeve grouting material, does not add in the production process and prevents frostbite or generate heat the component, can not satisfy the construction requirement under the negative temperature environment in winter. In the patent 2, materials such as quicklime, stearic acid and phase-change paraffin microspheres are added in the production process, so that the material cost is high, the components are complex, the instability of a system is increased, the materials are required to be ground together, and the production process is complex.
Disclosure of Invention
The invention aims to provide a low-temperature sleeve grouting material and a preparation method thereof, which have the advantages of higher fluidity, good construction performance, self-leveling, long operable time and smooth and flat surface after completion, and overcome the defects of unevenness, cracking, peeling, dusting and the like of the traditional mortar. The produced grouting material has no corrosion to the reinforcing steel bar, is durable and firm, and resists oil stain and other acid and alkali corrosion after being cured. .
In order to achieve the purpose, the invention is realized by the following technical scheme:
the utility model provides a low temperature sleeve grout material which characterized in that: comprises a gelled material, aggregate and an additive (1-2: 1-2: 0.02-0.5);
the cementing material comprises the following raw materials in parts by weight
P.O 42.5 Portland cement: 40-60 parts
High-alumina cement: 6-20 parts of
Sulphoaluminate cement: 3-10 parts of
Mineral admixture:
fly ash: 10-23 parts of
Mineral powder: 12 to 15 portions of
Silica fume: 4 to 6 portions of
The aggregate comprises the following raw materials in parts by weight:
20-40 mesh quartz sand: 40-50 parts of
Drying sand of 40-70 meshes: 30-40 parts of
Drying sand of 70-120 meshes: 30-40 parts of
The additive comprises the following raw materials in parts by weight:
0.5-1 part of water reducing agent
Retarder: 0.1 to 0.2 portion
Setting accelerator: 0.05 to 0.2 portion
An antifreezing agent: 0.5 to 1.5 portions of
Defoaming agent: 0.005-0.01 portion.
In the preferable scheme of the low-temperature sleeve grouting material, the fly ash is pretreated by adopting the following method: adding sodium metasilicate aqueous solution into fly ash, adding the fly ash into a reaction kettle, carrying out hydrothermal treatment for 2-3h at 90-100 ℃, filtering, drying, then adding the fly ash into sodium dihydrogen phosphate aqueous solution of carboxymethyl cellulose, stirring for 40-50min, filtering, and drying;
wherein: the feed-liquid ratio of the fly ash to the sodium metasilicate aqueous solution is 1 g: 15 mL; the concentration of the sodium metasilicate aqueous solution is 0.2 mol/L; the mass ratio of the fly ash to the aqueous solution of the carboxymethyl cellulose and the sodium dihydrogen phosphate is 1: 0.6-0.8: 5; the mass fraction of sodium dihydrogen phosphate is 25%.
According to the preferable scheme of the low-temperature sleeve grouting material, the water reducing agent is alkenyl sulfonate modified polycarboxylate water reducing agent powder, and the retarder is one or more of tartaric acid, white sugar, citric acid and sodium tripolyphosphate
According to the preferable scheme of the low-temperature sleeve grouting material, the coagulant is a polycarboxylic acid early strength agent, and the antifreezing agent is one or more of sodium nitrate, calcium nitrate, sodium sulfate and sodium formate.
According to the preferable scheme of the low-temperature sleeve grouting material, the defoaming agent is an organic silicon defoaming agent.
In the preferable scheme of the low-temperature sleeve grouting material, the air entraining agent is fatty alcohol nitrates: one or more of fatty alcohol-polyoxyethylene ether, fatty alcohol-polyoxyethylene sodium sulfonate and fatty alcohol sodium sulfate.
A preparation method of low-temperature sleeve grouting material comprises the following steps:
(a) preparing a cementing material: accurately weighing portland cement, high alumina cement, sulpho-alumina cement, fly ash, mineral powder and silica fume, and uniformly mixing all the materials;
(b) preparing aggregate: weighing drying sand and quartz sand with different fineness;
(c) weighing an additive with specified mass;
(d) uniformly mixing the cementing material, the aggregate and the additive, weighing water (12% of the total amount of the material) with specified mass, adding the water into a stirrer, starting stirring, and automatically stirring for 240 seconds to obtain the low-temperature sleeve grouting material.
The principle of the invention is as follows: the high-alumina cement contains a large amount of aluminate minerals which can rapidly hydrate minerals such as gibbsite, alumina gel and the like to form a hard crystal synthetic body, the sulphoaluminate cement contains a large amount of beta-C2S with higher activity and can generate C-S-H gel earlier, and ettringite generated by common silicate cement is interwoven with minerals such as gibbsite, C-S-H gel and the like, so that the structural compactness is improved, and the early strength is increased. The mineral admixture with different components is added, so that the morphological effect and the micro-aggregate effect are exerted, and the workability of the grouting material is improved. The antifreeze is added to lower the freezing point of water, ensure the cement hydration reaction and reduce the influence of temperature on the hydration process. The addition of the air entraining agent relieves the expansion pressure and osmotic pressure and improves the freeze-thaw cycle resistance.
The invention has the advantages that: the Portland cement, the high-alumina cement and the sulpho-alumina cement are compounded for use, so that the early strength is improved, and the later strength is ensured not to be lost; the produced low-temperature sleeve grouting material can be subjected to assembly type construction in an environment of not lower than-10 ℃, has high early strength, no loss of later strength, expansion rate and fluidity meeting standard requirements, does not need additional maintenance, does not need to add heating or heat storage components, and has simple production process, simple and easily obtained raw materials and low production cost.
Detailed Description
Example 1
A preparation method of low-temperature sleeve grouting material comprises the following steps:
(1) accurately weighing specified amounts of cementing materials, aggregates and additives according to the mixture ratio in table 1;
(2) uniformly mixing the cementing material, the aggregate and the additive, weighing water (12% of the total amount of the material) with specified mass, adding the water into a stirrer, starting stirring, and automatically stirring for 240 seconds to obtain the low-temperature sleeve grouting material. The low-temperature sleeve grouting material can meet the requirements of the standard JG/T408-2013 sleeve grouting material for connecting steel bars without additional heating or maintenance in the environment of not lower than-10 ℃.
TABLE 1 grouting material test ratio
Example 2
A preparation method of low-temperature sleeve grouting material comprises the following steps:
(1) accurately weighing specified amounts of cementing materials, aggregates and additives according to the mixture ratio in table 2;
(2) uniformly mixing the cementing material, the aggregate and the additive, weighing water (12% of the total amount of the material) with specified mass, adding the water into a stirrer, starting stirring, and automatically stirring for 240 seconds to obtain the low-temperature sleeve grouting material. The low-temperature sleeve grouting material can meet the requirements of the standard JG/T408-2013 sleeve grouting material for connecting steel bars without additional heating or maintenance in the environment of not lower than-10 ℃.
TABLE 2 grouting material test ratio
Example 3
A preparation method of low-temperature sleeve grouting material comprises the following steps:
(1) specified amounts of the cementing material, the aggregate and the admixture are accurately weighed according to the mixture ratio in the table 3;
(2) uniformly mixing the cementing material, the aggregate and the additive, weighing water (12% of the total amount of the material) with specified mass, adding the water into a stirrer, starting stirring, and automatically stirring for 240 seconds to obtain the low-temperature sleeve grouting material. The low-temperature sleeve grouting material can meet the requirements of the standard JG/T408-2013 sleeve grouting material for connecting steel bars without additional heating or maintenance in the environment of not lower than-10 ℃.
TABLE 3 grouting material test ratio
In this example, the fly ash was pretreated by the following method: adding sodium metasilicate aqueous solution into fly ash, adding the fly ash into a reaction kettle, carrying out hydrothermal treatment for 2-3h at 90-100 ℃, filtering, drying, then adding the fly ash into sodium dihydrogen phosphate aqueous solution of carboxymethyl cellulose, stirring for 40-50min, filtering, and drying.
In this example, the feed-liquid ratio of the fly ash to the sodium metasilicate aqueous solution is 1 g: 15 mL; the concentration of the sodium monthly silicate aqueous solution is 0.2 mol/L. The mass ratio of the fly ash to the aqueous solution of the carboxymethyl cellulose and the sodium dihydrogen phosphate is 1: 0.6-0.8: 5; the mass fraction of sodium dihydrogen phosphate is 25%. The activity of the fly ash is fully excited by using silicic acid groups and a high-temperature environment, the carboxypropyl methyl cellulose is a high-molecular polymer, the stability of fine particles in a system can be improved in a winding mode and the like, and the setting time can be adjusted by using phosphate groups in sodium dihydrogen phosphate. Through modification research on the fly ash, the activity of the fly ash is improved, the stability of the material is adjusted, and the setting time of the material is improved.
Comparative example
A preparation method of low-temperature sleeve grouting material comprises the following steps:
(1) accurately weighing specified amounts of cementing materials, aggregates and additives according to the mixture ratio in the table 4, wherein the cementing materials are only P.O 42.5 portland cement, and the water reducing agent is a commercially available common polycarboxylic acid water reducing agent;
(2) uniformly mixing the cementing material, the aggregate and the additive, weighing water (12% of the total amount of the material) with specified mass, adding the water into a stirrer, starting stirring, and automatically stirring for 240 seconds to obtain the low-temperature sleeve grouting material. The obtained low-temperature sleeve grouting material has low early strength and poor freezing resistance, and cannot meet the requirements of the standard JG/T408-2013 sleeve grouting material for reinforcing steel bar connection.
TABLE 4 grouting material test ratio
The low temperature sleeve grout results for each example were measured as follows:
in the embodiments 1 and 2, the low-temperature sleeve grouting material meets the requirements of the standard JG/T408-2013 sleeve grouting material for connecting steel bars by matching the proportion of common portland cement, sulpho-aluminum cement and high-aluminum cement with a modified polycarboxylate water reducer. On the basis, the mixing amount of the modified fly ash is further improved, the relative content of active components in a grouting material hydration system is improved, and the strength of the grouting material is further improved. The ordinary portland cement and the conventional fly ash are used in the comparative example, and the experimental result shows that the fluidity and the strength of the grouting material in the comparative example can not meet the engineering requirements of low-temperature grouting material.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a low temperature sleeve grout material which characterized in that: the concrete comprises the following components in percentage by weight: 1-2: 1-2: 0.02-0.5;
the cementing material comprises the following raw materials in parts by weight
P.O 42.5 Portland cement: 40-60 parts
High-alumina cement: 6-20 parts of
Sulphoaluminate cement: 3-10 parts of
Mineral admixture:
fly ash: 10-23 parts of
Mineral powder: 12 to 15 portions of
Silica fume: 4 to 6 portions of
The aggregate comprises the following raw materials in parts by weight:
20-40 mesh quartz sand: 40-50 parts of
Drying sand of 40-70 meshes: 30-40 parts of
Drying sand of 70-120 meshes: 30-40 parts of
The additive comprises the following raw materials in parts by weight:
0.5-1 part of water reducing agent
Retarder: 0.1 to 0.2 portion
Setting accelerator: 0.05 to 0.2 portion
An antifreezing agent: 0.5 to 1.5 portions of
Defoaming agent: 0.005-0.01 part
Air entraining agent: 0.005-0.01 portion.
2. A cryogenic sleeve grout of claim 1, wherein: the fly ash is pretreated by the following method: adding sodium metasilicate aqueous solution into fly ash, adding the fly ash into a reaction kettle, carrying out hydrothermal treatment for 2-3h at 90-100 ℃, filtering, drying, then adding the fly ash into sodium dihydrogen phosphate aqueous solution of carboxymethyl cellulose, stirring for 40-50min, filtering, and drying;
wherein: the feed-liquid ratio of the fly ash to the sodium metasilicate aqueous solution is 1 g: 15 mL; the concentration of the sodium metasilicate aqueous solution is 0.2 mol/L; the mass ratio of the fly ash to the aqueous solution of the carboxymethyl cellulose and the sodium dihydrogen phosphate is 1: 0.6-0.8: 5; the mass fraction of sodium dihydrogen phosphate is 25%.
3. A cryogenic sleeve grout of claim 1, wherein: the water reducing agent is alkenyl sulfonate modified polycarboxylate water reducing agent powder, and the retarder is one or more of tartaric acid, white sugar, citric acid and sodium tripolyphosphate.
4. A cryogenic sleeve grout of claim 1, wherein: the coagulant is polycarboxylic acid early strength agent, and the antifreezing agent is one or more of sodium nitrate, calcium nitrate, sodium sulfate and sodium formate.
5. A cryogenic sleeve grout of claim 1, wherein: the defoaming agent is an organic silicon defoaming agent.
6. A cryogenic sleeve grout of claim 1, wherein: the air entraining agent is fatty alcohol nitrate: one or more of fatty alcohol-polyoxyethylene ether, fatty alcohol-polyoxyethylene sodium sulfonate and fatty alcohol sodium sulfate.
7. The preparation method of the low-temperature sleeve grouting material is characterized by comprising the following steps of: the method comprises the following steps:
(a) preparing a cementing material: accurately weighing portland cement, high alumina cement, sulpho-alumina cement, fly ash, mineral powder and silica fume, and uniformly mixing all the materials;
(b) preparing aggregate: weighing drying sand and quartz sand with different fineness;
(c) weighing an additive with specified mass;
(d) the gelled material, the aggregate and the admixture are uniformly mixed, water (12 percent of the total amount of the material) with specified mass is weighed and added into a stirrer, the mixture is stirred for 60s at the rotating speed of 140 +/-5 r/min, the mixture is stirred for 30s at the rotating speed of 280 +/-10 r/min, the mixture is kept stand for 90s, the material on the pot wall is shoveled into the pot by a shovel, and then the mixture is stirred for 60s at the rotating speed of 280 +/-10 r/min.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112745093A (en) * | 2021-01-11 | 2021-05-04 | 湖北工业大学 | Early-strength high-temperature-resistant sleeve grouting material and preparation method thereof |
| CN113061003A (en) * | 2021-04-19 | 2021-07-02 | 北京市市政工程研究院 | Low-temperature ultrahigh-performance concrete and preparation method and application thereof |
| CN113513123A (en) * | 2021-07-28 | 2021-10-19 | 河南省第一建筑工程集团有限责任公司 | Grouting heat-storage maintenance construction method for prefabricated vertical member in low-temperature environment |
| CN113582624A (en) * | 2021-08-23 | 2021-11-02 | 崇德建材集团有限公司 | Quick-drying early-strength concrete and preparation method thereof |
| CN113858427A (en) * | 2021-09-07 | 2021-12-31 | 深圳宏业基岩土科技股份有限公司 | Preparation method of grouting material for repairing defects of rock-socketed section of cast-in-place pile |
| CN114014598A (en) * | 2021-11-30 | 2022-02-08 | 中国人民解放军空军工程大学 | Low-temperature-resistant geopolymer repair mortar and preparation method thereof |
| CN114133202A (en) * | 2021-12-07 | 2022-03-04 | 上海宝冶工程技术有限公司 | Low-temperature sleeve grouting material for connecting reinforcing steel bars |
| CN114213042A (en) * | 2021-12-27 | 2022-03-22 | 南京科工煤炭科学技术研究有限公司 | Double-fast sulphoaluminate cement for fast setting and fast strengthening in severe cold environment and preparation method and use method thereof |
| CN114933457A (en) * | 2022-05-23 | 2022-08-23 | 朱耀台 | Super early-strength self-compacting cement-based grouting material and preparation method thereof |
| CN115259771A (en) * | 2022-07-01 | 2022-11-01 | 新特新材料集团(河南)股份有限公司 | Sleeve grouting material for connecting steel bars in assembly type building field and preparation method thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112745093A (en) * | 2021-01-11 | 2021-05-04 | 湖北工业大学 | Early-strength high-temperature-resistant sleeve grouting material and preparation method thereof |
| CN113061003A (en) * | 2021-04-19 | 2021-07-02 | 北京市市政工程研究院 | Low-temperature ultrahigh-performance concrete and preparation method and application thereof |
| CN113513123A (en) * | 2021-07-28 | 2021-10-19 | 河南省第一建筑工程集团有限责任公司 | Grouting heat-storage maintenance construction method for prefabricated vertical member in low-temperature environment |
| CN113582624A (en) * | 2021-08-23 | 2021-11-02 | 崇德建材集团有限公司 | Quick-drying early-strength concrete and preparation method thereof |
| CN113858427A (en) * | 2021-09-07 | 2021-12-31 | 深圳宏业基岩土科技股份有限公司 | Preparation method of grouting material for repairing defects of rock-socketed section of cast-in-place pile |
| CN113858427B (en) * | 2021-09-07 | 2023-03-10 | 深圳宏业基岩土科技股份有限公司 | Preparation method of grouting material for repairing defects of rock-socketed section of cast-in-place pile |
| CN114014598A (en) * | 2021-11-30 | 2022-02-08 | 中国人民解放军空军工程大学 | Low-temperature-resistant geopolymer repair mortar and preparation method thereof |
| CN114133202A (en) * | 2021-12-07 | 2022-03-04 | 上海宝冶工程技术有限公司 | Low-temperature sleeve grouting material for connecting reinforcing steel bars |
| CN114213042A (en) * | 2021-12-27 | 2022-03-22 | 南京科工煤炭科学技术研究有限公司 | Double-fast sulphoaluminate cement for fast setting and fast strengthening in severe cold environment and preparation method and use method thereof |
| CN114213042B (en) * | 2021-12-27 | 2023-02-17 | 南京科工煤炭科学技术研究有限公司 | Double-fast sulphoaluminate cement for fast setting and fast strengthening in severe cold environment and preparation method and use method thereof |
| CN114933457A (en) * | 2022-05-23 | 2022-08-23 | 朱耀台 | Super early-strength self-compacting cement-based grouting material and preparation method thereof |
| CN115259771A (en) * | 2022-07-01 | 2022-11-01 | 新特新材料集团(河南)股份有限公司 | Sleeve grouting material for connecting steel bars in assembly type building field and preparation method thereof |
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Application publication date: 20201023 |