CN111393067B - Low-dosage grouting agent - Google Patents
Low-dosage grouting agent Download PDFInfo
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- CN111393067B CN111393067B CN202010234991.5A CN202010234991A CN111393067B CN 111393067 B CN111393067 B CN 111393067B CN 202010234991 A CN202010234991 A CN 202010234991A CN 111393067 B CN111393067 B CN 111393067B
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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
Abstract
The invention discloses a low-dosage grouting agent, which belongs to the technical field of building materials and is prepared from the following raw materials in parts by weight: 4-6 parts of dispersing component, 60-100 parts of early strength filling component, 0.5-1.0 part of expansion component, 2-4 parts of stabilizing component, 0.3-0.6 part of water retention thickening component, 0.1-0.3 part of defoaming component and 0.5-1 part of air entraining component. The grouting agent has the advantages of good adaptability to different cements, low mixing amount, good fluidity and fluidity retention capacity, uniform slurry without bleeding phenomenon, controllable free expansion rate, good filling degree, mechanical property index exceeding the standard requirement and no corrosion to reinforcing steel bars.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a low-dosage grouting agent.
Background
The grouting agent is a mixture prepared by uniformly mixing a plurality of raw materials such as a high-performance water reducing agent, a mineral admixture, an expanding agent, a rheological agent, a defoaming agent and the like. The grouting agent, cement and water are uniformly stirred in proportion on a construction site according to engineering requirements, and then the grouting agent is used for post-tensioned prestressed pipeline filling or anchoring grouting of large equipment and foundation grouting.
The grouting agent can effectively prevent the corrosion of the prestressed reinforcement and ensure that the stress can be effectively transmitted between the prestressed tendon and the concrete structure, so that the grout in the pore canal is full and compact and is not shrunk, which is particularly important. Although the national standard and the industrial standard have strict technical and construction requirements on the grouting agent, the grouting is a one-time project, the grouting cannot be maintained and reworked, and structural damage events caused by grouting failure occur in the project, so the grouting agent with excellent quality and the construction process which is in compliance are particularly important for the project. Due to unreasonable market behaviors, the grouting agents in the market are mixed in a fish-dragon-like mode, and after construction is completed, slurry sinks, bleeds and shrinks, so that prestress transmission is influenced, and the safety and durability of the structure are seriously influenced.
Disclosure of Invention
Aiming at the technical problems, the invention provides a low-dosage grouting agent which has the advantages of good adaptability to different cements, low dosage, good fluidity and fluidity retention capacity, uniform slurry without bleeding phenomenon, controllable free expansion rate, good fullness, mechanical property index exceeding the standard requirement and no corrosion to reinforcing steel bars.
In order to achieve the purpose, the invention adopts the following technical scheme:
the low-dosage grouting agent is prepared from the following raw materials in parts by weight:
4-6 parts of dispersing component, 60-100 parts of early strength filling component, 0.5-1.0 part of expansion component, 2-4 parts of stabilizing component, 0.3-0.6 part of water retention thickening component, 0.1-0.3 part of defoaming component and 0.5-1 part of air entraining component.
Preferably, the low-dosage grouting agent is prepared from the following raw materials in parts by weight:
4.8-5.2 parts of dispersing component, 70-90 parts of early strength filling component, 0.6-0.8 part of expansion component, 2.2-3.6 parts of stabilizing component, 0.4-0.5 part of water retention thickening component, 0.2-0.3 part of defoaming component and 0.5-0.8 part of air entraining component.
Further preferably, the low-dosage grouting agent is prepared from the following raw materials in parts by weight:
5 parts of a dispersing component, 80 parts of an early strength filling component, 0.7 part of an expansion component, 3 parts of a stabilizing component, 0.45 part of a water-retention thickening component, 0.25 part of a defoaming component and 0.6 part of an air entraining component.
Preferably, the dispersing component is a polycarboxylic acid water reducing agent.
Preferably, the early strength filling component consists of superfine silicon powder and superfine slag powder, and the mass percentage of the superfine silicon powder and the superfine slag powder in the early strength filling component is 40-60% and 20-40% respectively.
Preferably, the expansion component is a plastic expansion agent.
Preferably, the stabilizing component is a segregation resistant stabilizing component.
Preferably, the water-retaining thickening component consists of cellulose ether and starch ether, and the mass percentage of the cellulose ether and the starch ether in the water-retaining thickening component is 0.1-0.2% and 0.2-0.4%, respectively.
Preferably, the defoaming component is a silicone defoamer.
Preferably, the air entraining component is a polyether air entraining agent.
The beneficial technical effects of the invention are as follows: the low-dosage grouting agent has good adaptability to different cements, and the dosage is 50 percent lower than that of the common cement in the market; the grouting agent has good fluidity and fluidity retention capacity; the slurry is uniform and has no bleeding phenomenon; the free expansion rate is controllable, and the filling degree is good; the mechanical property index exceeds the standard requirement; has no corrosion effect on the steel bars.
Detailed Description
The present invention will be further described with reference to the following specific examples.
Example 1
The low-dosage grouting agent is prepared from the following raw materials in parts by weight:
5 parts of a dispersing component, 80 parts of an early strength filling component, 0.7 part of an expansion component, 3 parts of a stabilizing component, 0.45 part of a water-retention thickening component, 0.25 part of a defoaming component and 0.6 part of an air entraining component.
The dispersing component is a polycarboxylic acid water reducing agent.
The early strength filling component consists of superfine silicon powder and superfine slag powder, and the mass percentage of the superfine silicon powder and the superfine slag powder in the early strength filling component is 40% and 40% respectively.
The expansion component is a plastic expanding agent.
The stabilizing component is an anti-segregation stabilizing component.
The water-retaining thickening component consists of cellulose ether and starch ether, and the mass percentage content of the cellulose ether and the starch ether in the water-retaining thickening component is 0.1 percent and 0.4 percent respectively.
The defoaming component is an organic silicon defoaming agent.
The air entraining component is a polyether air entraining agent.
The components are accurately metered and added into a mixer to be uniformly mixed, and the grouting agent can be obtained.
And (4) testing the performance of the grouting agent according to technical Specification for construction of bridges and culverts on roads (JTG/T F50-2011). The test mixing ratio is cement, grouting agent and water is 0.95:0.05:0.26, wherein the cement is ordinary portland cement and conch cement, and the mixture is stirred by a high-speed stirrer (1000 r/min). Firstly, adding required water into a stirrer, sequentially adding a grouting agent and cement during stirring, pouring out after stirring for 5min to test the slurry performance, wherein the test results are shown in the following table 1:
TABLE 1
From table 1, the grouting material has good fluidity, no phenomenon of layering and segregation and bottom scraping, excellent working performance and various mechanical performance indexes far exceeding the standard and standard requirements.
Example 2
The low-dosage grouting agent is prepared from the following raw materials in parts by weight:
4 parts of a dispersing component, 60 parts of an early strength filling component, 0.5 part of an expanding component, 2 parts of a stabilizing component, 0.3 part of a water-retaining thickening component, 0.1 part of a defoaming component and 0.5 part of an air entraining component.
The dispersing component is a polycarboxylic acid water reducing agent.
The early strength filling component consists of superfine silicon powder and superfine slag powder, and the mass percentage of the superfine silicon powder and the superfine slag powder in the early strength filling component is 60 percent and 20 percent respectively.
The expansion component is a plastic expanding agent.
The stabilizing component is an anti-segregation stabilizing component.
The water-retaining thickening component consists of cellulose ether and starch ether, and the mass percentage content of the cellulose ether and the starch ether in the water-retaining thickening component is 0.2 percent and 0.2 percent respectively.
The defoaming component is an organic silicon defoaming agent.
The air entraining component is a polyether air entraining agent.
The components are accurately metered and added into a mixer to be uniformly mixed, and the grouting agent can be obtained.
And (4) testing the performance of the grouting agent according to technical Specification for construction of bridges and culverts on roads (JTG/T F50-2011). The test mixing ratio is cement, grouting agent and water is 0.95:0.05:0.26, wherein the cement is ordinary portland cement huaxin cement, and the mixture is stirred by a high-speed stirrer (1000 r/min). Firstly, adding required water into a stirrer, sequentially adding a grouting agent and cement during stirring, pouring out after stirring for 5min to test the slurry performance, wherein the test results are shown in the following table 2:
TABLE 2
From table 2, the grouting material has good fluidity, no phenomenon of layering and segregation and bottom scraping, excellent working performance and various mechanical performance indexes far exceeding the standard and standard requirements.
Example 3
The low-dosage grouting agent is prepared from the following raw materials in parts by weight:
6 parts of a dispersing component, 100 parts of an early strength filling component, 1.0 part of an expansion component, 4 parts of a stabilizing component, 0.6 part of a water-retention thickening component, 0.3 part of a defoaming component and 1 part of an air entraining component.
The dispersing component is a polycarboxylic acid water reducing agent.
The early strength filling component consists of superfine silicon powder and superfine slag powder, and the mass percentage of the superfine silicon powder and the superfine slag powder in the early strength filling component is respectively 50% and 30%.
The expansion component is a plastic expanding agent.
The stabilizing component is an anti-segregation stabilizing component.
The water-retaining thickening component consists of cellulose ether and starch ether, and the mass percentage content of the cellulose ether and the starch ether in the water-retaining thickening component is 0.15 percent and 0.3 percent respectively.
The defoaming component is an organic silicon defoaming agent.
The air entraining component is a polyether air entraining agent.
The components are accurately metered and added into a mixer to be uniformly mixed, and the grouting agent can be obtained.
And (4) testing the performance of the grouting agent according to technical Specification for construction of bridges and culverts on roads (JTG/T F50-2011). The test mixing ratio is cement, grouting agent and water is 0.95:0.05:0.26, wherein the cement is ordinary portland cement Qinling cement, and the mixture is stirred by a high-speed stirrer (1000 r/min). Firstly, adding required water into a stirrer, sequentially adding a grouting agent and cement during stirring, pouring out after stirring for 5min to test the slurry performance, wherein the test results are shown in the following table 3:
TABLE 3
From table 3, the grouting material has good fluidity, no phenomenon of layering and segregation and bottom scraping, excellent working performance and various mechanical performance indexes far exceeding the standard and standard requirements.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and variations which do not require inventive efforts and are made by those skilled in the art are still within the scope of the present invention.
Claims (3)
1. The low-dosage grouting agent is characterized by being prepared from the following raw materials in parts by weight:
4-6 parts of a dispersing component, 60-100 parts of an early strength filling component, 0.5-1.0 part of an expanding component, 2-4 parts of a stabilizing component, 0.3-0.6 part of a water-retaining thickening component, 0.1-0.3 part of a defoaming component and 0.5-1 part of an air entraining component; the water-retaining thickening component comprises cellulose ether and starch ether, the mass percentages of the cellulose ether and the starch ether in the water-retaining thickening component are respectively 0.1-0.2% and 0.2-0.4%, the air entraining component is a polyether air entraining agent, the dispersing component is a polycarboxylic acid water reducing agent, the early strength filling component comprises superfine silicon powder and superfine slag powder, the mass percentages of the superfine silicon powder and the superfine slag powder in the early strength filling component are respectively 40-60% and 20-40%, the expanding component is a plastic expanding agent, the stabilizing component is an anti-segregation stabilizing component, and the defoaming component is an organic silicon defoaming agent; when in use, the mixture ratio is cement: a grouting agent: water =0.95:0.05: 0.26.
2. The low-dosage grouting agent as claimed in claim 1, which is prepared from the following raw materials in parts by weight:
4.8-5.2 parts of dispersing component, 70-90 parts of early strength filling component, 0.6-0.8 part of expansion component, 2.2-3.6 parts of stabilizing component, 0.4-0.5 part of water retention thickening component, 0.2-0.3 part of defoaming component and 0.5-0.8 part of air entraining component.
3. The low-dosage grouting agent as claimed in claim 1, which is prepared from the following raw materials in parts by weight:
5 parts of a dispersing component, 80 parts of an early strength filling component, 0.7 part of an expansion component, 3 parts of a stabilizing component, 0.45 part of a water-retention thickening component, 0.25 part of a defoaming component and 0.6 part of an air entraining component.
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| CN202010234991.5A CN111393067B (en) | 2020-03-29 | 2020-03-29 | Low-dosage grouting agent |
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| CN202010234991.5A CN111393067B (en) | 2020-03-29 | 2020-03-29 | Low-dosage grouting agent |
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| CN111393067A CN111393067A (en) | 2020-07-10 |
| CN111393067B true CN111393067B (en) | 2022-05-06 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005231981A (en) * | 2004-02-23 | 2005-09-02 | Ps Mitsubishi Construction Co Ltd | Admixing agent for grout material and grout material |
| CN101817656A (en) * | 2009-02-26 | 2010-09-01 | 北京东方雨虹防水技术股份有限公司 | Post stressed concrete beam pipe mudjacking agent |
| CN103193414A (en) * | 2013-03-08 | 2013-07-10 | 蒋成飞 | Post-tensioning prestressed concrete beam pore high-strength grouting agent |
| CN103288378A (en) * | 2013-05-14 | 2013-09-11 | 河北工业大学 | Novel prestressed duct grouting agent and preparation method thereof |
| CN104402366A (en) * | 2014-11-03 | 2015-03-11 | 甘肃畅陇公路养护技术研究院有限公司 | Post-tensioned pre-stressing pipeline grouting agent |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104072007B (en) * | 2014-06-11 | 2017-02-08 | 广东省长大公路工程有限公司 | Superfine mineral micro powder grouting agent for duct grouting |
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2020
- 2020-03-29 CN CN202010234991.5A patent/CN111393067B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005231981A (en) * | 2004-02-23 | 2005-09-02 | Ps Mitsubishi Construction Co Ltd | Admixing agent for grout material and grout material |
| CN101817656A (en) * | 2009-02-26 | 2010-09-01 | 北京东方雨虹防水技术股份有限公司 | Post stressed concrete beam pipe mudjacking agent |
| CN103193414A (en) * | 2013-03-08 | 2013-07-10 | 蒋成飞 | Post-tensioning prestressed concrete beam pore high-strength grouting agent |
| CN103288378A (en) * | 2013-05-14 | 2013-09-11 | 河北工业大学 | Novel prestressed duct grouting agent and preparation method thereof |
| CN104402366A (en) * | 2014-11-03 | 2015-03-11 | 甘肃畅陇公路养护技术研究院有限公司 | Post-tensioned pre-stressing pipeline grouting agent |
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