CN110590300A - Super early strength cement-based grouting material and production method thereof - Google Patents
Super early strength cement-based grouting material and production method thereof Download PDFInfo
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- CN110590300A CN110590300A CN201910908643.9A CN201910908643A CN110590300A CN 110590300 A CN110590300 A CN 110590300A CN 201910908643 A CN201910908643 A CN 201910908643A CN 110590300 A CN110590300 A CN 110590300A
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- cement
- grouting material
- based grouting
- early strength
- reducing agent
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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
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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
- 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
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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
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a super early strength cement-based grouting material, which comprises sulphoaluminate cement, dihydrate gypsum, a shrinkage reducing agent, a water reducing agent, a retarder and quartz sand. The invention has the beneficial effects that: the rapid setting agent can be rapidly set at normal temperature, the initial setting time is 5-10 minutes, and the final setting time is 10-15 minutes; the cement-based grouting material has good fluidity, and the initial fluidity of the mortar is 340-380 mm; the cement-based grouting material has excellent mechanical properties, the 2h compressive strength is 20-35 MPa, and the 28d compressive strength is 80-100 MPa; the vertical expansion rate of the cement-based grouting material 28d is 0.1-0.5 percent; the controllable range of the proportion of the cement-based grouting material is large, and the cement-based grouting material has the advantages of super early strength, high fluidity, micro expansion, stable later strength, strong applicability and the like.
Description
Technical Field
The invention relates to the technical field of cement concrete application, in particular to a super early strength cement-based grouting material and a production method thereof.
Background
Cement-based grouting materials can meet specific strength requirements within a few hours, and therefore play an important role in construction engineering. The reinforcing steel bar grouting sleeve connection technology adopted in the assembly type building which is widely popularized in China requires that the grouting material has the performances of super early strength, high fluidity, micro expansion and the like; the repair of the airport runway is difficult to adapt to economic development after 24 hours, and the application of the super early strength cement-based grouting material can shorten the traffic opening time, generally requires that the 8-hour compressive strength is not lower than 20MPa, and when special requirements exist, the 2-hour compressive strength is not lower than 20 MPa.
The preparation of the ultra-early-strength cement-based grouting material is focused on the following three ways: firstly, Portland cement is used as a main cementing material, other additives and mineral admixtures are added for modification, and the grouting material has low cost and wide application, but has low early strength and large later-stage volume shrinkage; secondly, the sulphoaluminate cement and the aluminate cement are used as cementing materials, the grouting material has the advantages of quick setting, high early strength and micro expansion, but the production cost is high and the later strength is reduced; and thirdly, the portland cement is compounded with the sulphoaluminate cement or the aluminate cement, and other additives are added for modification, so that the grouting material has high early strength, micro-expansion and stable later strength, but the raw material components are complex, the proportion needs to be adjusted frequently, and the applicability is poor.
Disclosure of Invention
The invention aims to solve the technical problem of providing the super-early-strength cement-based grouting material and the production method thereof so as to overcome the defects in the prior art.
The technical scheme for solving the technical problems is as follows: a super early strength cement-based grouting material comprises sulphoaluminate cement, dihydrate gypsum, a shrinkage reducing agent, a water reducing agent, a retarder and quartz sand.
In the scheme, the weight parts of the components are as follows:
sulphoaluminate cement: 100 parts of dihydrate gypsum: 5-15 parts of shrinkage reducing agent: 0.5-1.5 parts of a water reducing agent: 0.5-1.5 parts of retarder: 0.2-0.8 parts of quartz sand: 80-100 parts.
In the scheme, the shrinkage reducing agent is alkyl polyoxyethylene ether and methyl ether polymer, and the mass ratio of the alkyl polyoxyethylene ether to the methyl ether polymer is 2: 3-3: 2.
In the scheme, the water reducing agent is a polycarboxylate water reducing agent and is liquid, the water reducing rate is 20-35%, and the solid content is 30-40%.
In the scheme, the retarder is a mixture of sodium gluconate and borax, and the mass ratio of the sodium gluconate to the borax is 1: 3-1: 1.
In the scheme, the quartz sand is medium-grade standard sand.
A production method of super early strength cement-based grouting material comprises the following steps:
s100, grinding the sulphoaluminate cement to obtain superfine sulphoaluminate cement;
s200, adding dihydrate gypsum, a retarder and quartz sand into the superfine sulphoaluminate cement, and stirring and mixing to obtain a mixture;
s300, adding a shrinkage reducing agent, a water reducing agent and water into the mixture, stirring and mixing, pouring, molding, filling into a mold, and maintaining to obtain the super early strength cement-based grouting material.
In the scheme, the mass ratio of the sulphoaluminate cement to the water is as follows: 23-30 parts of water is added into each 100 parts of sulphoaluminate cement.
The invention has the beneficial effects that: according to the super early strength cement-based grouting material, the super early strength cement-based grouting material is compounded by adopting the superfine sulphoaluminate cement and various additives, so that the cement-based grouting material can be quickly condensed at normal temperature, the initial setting time is 5-10 minutes, and the final setting time is 10-15 minutes; the cement-based grouting material has good fluidity, and the initial fluidity of the mortar is 340-380 mm; the cement-based grouting material has excellent mechanical properties, the 2h compressive strength is 20-35 MPa, and the 28d compressive strength is 80-100 MPa; the vertical expansion rate of the cement-based grouting material 28d is 0.1-0.5 percent; the controllable range of the proportion of the cement-based grouting material is large, and the cement-based grouting material has the advantages of super early strength, high fluidity, micro expansion, stable later strength, strong applicability and the like.
Detailed Description
The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
A super early strength cement-based grouting material comprises sulphoaluminate cement, dihydrate gypsum, a shrinkage reducing agent, a water reducing agent, a retarder and quartz sand.
The weight parts of the components are as follows:
sulphoaluminate cement: 100 parts of dihydrate gypsum: 5-15 parts of shrinkage reducing agent: 0.5-1.5 parts of a water reducing agent: 0.5-1.5 parts of retarder: 0.2-0.8 parts of quartz sand: 80-100 parts.
The shrinkage reducing agent is alkyl polyoxyethylene ether and methyl ether polymer, and the mass ratio of the alkyl polyoxyethylene ether to the methyl ether polymer is 2: 3-3: 2.
The water reducing agent is a polycarboxylic acid water reducing agent and is liquid, the water reducing rate is 20-35%, and the solid content is 30-40%.
The retarder is a mixture of sodium gluconate and borax, and the mass ratio of the sodium gluconate to the borax is 1: 3-1: 1.
The quartz sand is medium-grade standard sand, namely the quartz sand is medium-grade quartz sand and meets the requirements of ISO standards.
A production method of super early strength cement-based grouting material comprises the following steps:
s100, grinding the sulphoaluminate cement to obtain superfine sulphoaluminate cement;
the method comprises the following specific steps:
adding sulphoaluminate cement into a ball mill, wherein a grinding body is a steel ball, the particle size and mass ratio of the grinding body to the grinding body is (9.4-10.5) mm, (7.8-9.6) mm, (4.5-5.3) mm ═ 1-1.2: (3.5-4): 4-4.5), and grinding 60-120 min at 400-600 r/min to obtain superfine sulphoaluminate cement;
s200, adding dihydrate gypsum, a retarder and quartz sand into the superfine sulphoaluminate cement, and uniformly stirring at 300-600 rpm to obtain a mixture;
s300, adding a shrinkage reducing agent, a water reducing agent and water into the mixture, stirring and stirring for 60-90 seconds at 1000-1500 rpm, pouring, molding, filling into a mold and maintaining to obtain the super early strength cement-based grouting material, wherein the mass ratio of the sulphoaluminate cement to the water is as follows: 23-30 parts of water is added into each 100 parts of sulphoaluminate cement.
According to the super early strength cement-based grouting material, the super early strength cement-based grouting material is compounded by adopting the superfine sulphoaluminate cement and various additives, so that the cement-based grouting material can be quickly condensed at normal temperature, the initial setting time is 5-10 minutes, and the final setting time is 10-15 minutes; the cement-based grouting material has good fluidity, and the initial fluidity of the mortar is 340-380 mm; the cement-based grouting material has excellent mechanical properties, the 2h compressive strength is 20-35 MPa, and the 28d compressive strength is 80-100 MPa; the vertical expansion rate of the cement-based grouting material 28d is 0.1-0.5 percent; the controllable range of the proportion of the cement-based grouting material is large, and the cement-based grouting material has the advantages of super early strength, high fluidity, micro expansion, stable later strength, strong applicability and the like.
After the sulphoaluminate cement is subjected to grinding treatment, the surface energy is increased, and the hydration rate is accelerated; the adoption of the dihydrate gypsum promotes the formation of a hydration product, namely ettringite, so that the hydration rate is further accelerated, and theoretical support is provided for realizing rapid setting and super early strength of the cement grouting material.
The sodium gluconate can wet the surfaces of the sulphoaluminate cement particles, the borax reacts with calcium ions to generate precipitates which are adsorbed on the surfaces of the sulphoaluminate cement particles to form a shielding layer, and the hydration temperature peak of the sulphoaluminate cement is reduced, so that the high fluidity of the cement grouting material is ensured.
The shrinkage reducing agent reduces the surface tension of the cement grouting material pore solution, reduces the shrinkage value of the cement-based material in the hydration process, and in addition, the sulphoaluminate cement hydration product ettringite has expansibility and the two functions are coupled to realize the micro-expansion characteristic of the cement grouting material.
The superfine sulphoaluminate cement has high post hydration degree and high density of the matrix, and effectively ensures the stability of the post strength of the cement-based grouting material.
Table 1 shows the ratio of each component in the ultra-early strength cement-based grouting material of embodiments 1 to 6 of the present invention:
TABLE 1
The basic performance tests of examples 1-6 were performed with reference to the standard JG/T408-2013, and the test results are shown in Table 2.
TABLE 2
As can be seen from Table 2, the ultra-early strength cement-based grouting materials of examples 1 to 6 have excellent performance, the initial setting time is 5 to 10 minutes, and the final setting time is 10 to 15 minutes; the initial fluidity of the mortar is 340-380 mm; the cement-based grouting material has the advantages that the 2-hour compressive strength is 20-35 MPa, the 7-day compressive strength is 80-100 MPa, and the 28-day vertical expansion rate is 0.1% -0.5%.
Although an application example of the present invention has been shown and described above, it should be understood that the above application example is illustrative and not to be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above application example within the scope of the present invention.
Claims (8)
1. The super early strength cement-based grouting material is characterized by comprising sulphoaluminate cement, dihydrate gypsum, a shrinkage reducing agent, a water reducing agent, a retarder and quartz sand.
2. The super early strength cement-based grouting material as claimed in claim 1, wherein the components are in parts by mass:
sulphoaluminate cement: 100 parts of dihydrate gypsum: 5-15 parts of shrinkage reducing agent: 0.5-1.5 parts of a water reducing agent: 0.5-1.5 parts of retarder: 0.2-0.8 parts of quartz sand: 80-100 parts.
3. The super early strength cement-based grouting material as claimed in claim 1 or 2, wherein the shrinkage reducing agent is an alkyl polyoxyethylene ether and a methyl ether polymer, and the mass ratio of the alkyl polyoxyethylene ether to the methyl ether polymer is 2: 3-3: 2.
4. The super early strength cement-based grouting material as claimed in claim 1 or 2, wherein the water reducing agent is a polycarboxylic acid water reducing agent and is a liquid, the water reducing rate is 20-35%, and the solid content is 30-40%.
5. The super early strength cement-based grouting material as claimed in claim 1 or 2, wherein the retarder is a mixture of sodium gluconate and borax in a mass ratio of 1:3 to 1: 1.
6. The ultra-early strength cement-based grouting material as claimed in claim 1 or 2, wherein the quartz sand is medium grade standard sand.
7. The production method of the super early strength cement-based grouting material is characterized by comprising the following steps:
s100, grinding the sulphoaluminate cement to obtain superfine sulphoaluminate cement;
s200, adding dihydrate gypsum, a retarder and quartz sand into the superfine sulphoaluminate cement, and stirring and mixing to obtain a mixture;
s300, adding a shrinkage reducing agent, a water reducing agent and water into the mixture, stirring and mixing, pouring, molding, filling into a mold, and maintaining to obtain the super early strength cement-based grouting material.
8. The production method of the super early strength cement-based grouting material as claimed in claim 7, wherein the mass ratio of the sulphoaluminate cement to water is as follows: 23-30 parts of water is added into each 100 parts of sulphoaluminate cement.
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| CN201910908643.9A CN110590300A (en) | 2019-09-25 | 2019-09-25 | Super early strength cement-based grouting material and production method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113250030A (en) * | 2021-06-02 | 2021-08-13 | 英达热再生有限公司 | Perfusion and blade coating type semi-flexible pavement and construction method |
| CN115231881A (en) * | 2022-07-20 | 2022-10-25 | 湖州市公路与运输管理中心 | Ultra-early-strength anti-cracking type sulpho-aluminum cement stabilized macadam and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11292579A (en) * | 1998-04-06 | 1999-10-26 | Chichibu Concrete Kogyo Kk | Injecting material |
| CN101786838A (en) * | 2010-01-20 | 2010-07-28 | 北京新中岩建材科技有限公司 | Early strength grouting material |
| CN101913840A (en) * | 2010-08-10 | 2010-12-15 | 刘茂平 | Rapid hardening high-strength grouting material |
| CN110128088A (en) * | 2019-05-21 | 2019-08-16 | 武汉沃尔浦科技有限公司 | A kind of high fluidity reinforcing bar sleeve for connection grouting material |
-
2019
- 2019-09-25 CN CN201910908643.9A patent/CN110590300A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11292579A (en) * | 1998-04-06 | 1999-10-26 | Chichibu Concrete Kogyo Kk | Injecting material |
| CN101786838A (en) * | 2010-01-20 | 2010-07-28 | 北京新中岩建材科技有限公司 | Early strength grouting material |
| CN101913840A (en) * | 2010-08-10 | 2010-12-15 | 刘茂平 | Rapid hardening high-strength grouting material |
| CN110128088A (en) * | 2019-05-21 | 2019-08-16 | 武汉沃尔浦科技有限公司 | A kind of high fluidity reinforcing bar sleeve for connection grouting material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113250030A (en) * | 2021-06-02 | 2021-08-13 | 英达热再生有限公司 | Perfusion and blade coating type semi-flexible pavement and construction method |
| CN115231881A (en) * | 2022-07-20 | 2022-10-25 | 湖州市公路与运输管理中心 | Ultra-early-strength anti-cracking type sulpho-aluminum cement stabilized macadam and preparation method thereof |
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Application publication date: 20191220 |