CN102219433A - Low-resilience high-strength sprayed concrete liquid accelerating agent and preparation method thereof - Google Patents
Low-resilience high-strength sprayed concrete liquid accelerating agent and preparation method thereof Download PDFInfo
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- CN102219433A CN102219433A CN2011101132080A CN201110113208A CN102219433A CN 102219433 A CN102219433 A CN 102219433A CN 2011101132080 A CN2011101132080 A CN 2011101132080A CN 201110113208 A CN201110113208 A CN 201110113208A CN 102219433 A CN102219433 A CN 102219433A
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- sodium aluminate
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- aqueous solution
- acrylamide
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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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to a low-resilience high-strength sprayed concrete liquid accelerating agent and a preparation method thereof, which can effectively solve the problems that the later strength of the concrete is high and the adaptability of the accelerating agent to cement is wide as the accelerating agent increases the viscosity of concrete slurry, reduces the resilience rate and reduces the alkali content in the concrete wet-spraying process; the accelerating agent is prepared by adopting aluminium sulfate, sodium aluminate, acid regulator, acrylamide, methacrylic acid polymer and water; and the production method comprises the following steps: adding water to aluminium sulfate and sodium aluminate to respectively prepare aluminium sulfate aqueous solution and odium aluminate aqueous solution; during stirring, the sodium aluminate aqueous solution is slowly added into the aluminium sulfate aqueous solution, and precipitate AL(OH)3 is produced; the acid regulator is added, the pH value is regulated to be 2-3, and stirring is continued until the precipitate AL(OH)3 is completely dissolved, and then the acrylamide and methacrylic acid polymer solution is added and is stirred to be uniform. The invention has the advantages of being low in resilience rate, high in strength, strong in adaptability to cement of different varieties and the like, and has great economic and social benefits.
Description
Technical field
The present invention relates to mine and tunnel construction technology field, particularly be applied to a kind of low resilience high strength spray concrete liquid accelerator in rock drift and the tunnel wet shotcreting and preparation method thereof.
Background technology
Accelerating chemicals is a kind of chemical admixture that can make the cement rapid coagulation, and its use can make cement setting and harden in a short period of time, is mainly used in sprayed concrete and the engineering construction of injection mortar.In recent years, the wet spraying concrete making technology is because easy construction easily row, high efficient construction and progressively replace traditional dried pressure spray process, and liquid accelerator with matching has also obtained using widely.
But in the wet shot process, rebound degree height, jet quality instability are to perplex the difficult problem of sprayed concrete development for a long time.China Coal Research Institute developed and was used for dry shotcreting and subtracts the accelerating chemicals that plays depositing dust nineteen ninety, the water-soluble polymerss such as carboxymethyl cellulose ester, polyethylene glycol and polyacrylamide that have thickening power by interpolation, effectively reduced the rebound degree of sprayed concrete, but consumption is big, also fails to solve the deficiency that late strength of concrete reduces.In present wet shotcreting practice of construction operation, the rebound degree of sprayed concrete generally more than 30%, has caused waste of material, influences construction quality and construction speed.
And at present, the liquid accelerator that the wet spraying concrete is commonly used comprises alkaline liquid accelerating agent and low alkali (or alkali-free) liquid accelerator based on water glass, sodium aluminate.Wherein, the alkalinity height of alkaline liquid accelerating agent, easily the health to the construction workman damages, and after it mixes concrete, and endurance quality descends the later strength of sprayed concrete obviously to be reduced and impervious etc.Therefore for the consideration of accelerating chemicals to the influence of aspects such as sprayed concrete mechanical property, workability and constructional method, the low liquid accelerating chemicals of alkali (or alkali-free) is the developing direction of main flow accelerating chemicals in the world.
Summary of the invention
At above-mentioned situation, for overcoming deficiency of the prior art, the present invention's purpose just provides and is exclusively used in concrete a kind of low resilience high strength spray concrete liquid accelerator of Tunnel Engineering wet spraying and preparation method thereof, can effectively solve accelerating chemicals in the concrete spraying process, increase the concrete material slurry viscosity, reduce rebound degree, reduce alkali content, make the late strength of concrete height, and to the suitability of cement problem widely.
The present invention is achieved through the following technical solutions, make by Tai-Ace S 150, sodium aluminate, acid regulator, acrylamide, Sipacril 2739OF and water, each composition weight percent is as follows: Tai-Ace S 150 40～55%, sodium aluminate 5～15%, acid regulator 2～5%, acrylamide, Sipacril 2739OF 0.05～0.5%, surplus is a water, its production method is, Tai-Ace S 150 and sodium aluminate are added water, is mixed with the aqueous solution of Tai-Ace S 150 and sodium aluminate respectively; Under agitation, sodium aluminate aqueous solution is slowly joined in the aluminum sulfate aqueous solution, throw out Al (OH) is arranged
3Generate, add acid regulator again, regulating the pH value is 2～3, and is stirred to throw out Al (OH)
3Dissolving adds acrylamide, Sipacril 2739OF solution more fully, stirs.
Said acrylamide and Sipacril 2739OF solution are soluble in water by weight 1 ︰ 3～5, its mass concentration is 5～10%, add initiator then, the initiator add-on is 5% of a multipolymer gross weight, polymerization 2～4h under 60～80 ℃ temperature, acrylamide and Sipacril 2739OF, acrylamide that uses among the present invention and Sipacril 2739OF preferable amount are 0.1～0.3%.
Said Tai-Ace S 150 is technical grade Tai-Ace S 150, Al
2O
3Content for accelerating the dissolution rate of Tai-Ace S 150, can be selected sheet Tai-Ace S 150 greater than 15% for use, and the preferable amount of Tai-Ace S 150 is 47～52% among the present invention; Said sodium aluminate is an industrial sodium aluminate, or by NaOH and Al (OH)
3Reaction makes, and requires Na
2O content 28～35%, Al
2O
3Content 40～50%, the preferable amount of industrial sodium aluminate is 7～12% among the present invention; Said acid regulator is a hydrofluoric acid, or sulfuric acid, or hydrochloric acid, or phosphoric acid, its objective is that the pH value of regulating the accelerating chemicals solution system is in 2～3 scopes; Said initiator is ammonium persulphate or Sodium Persulfate or hydrogen peroxide.
The present invention compared with prior art, rebound degree is low, intensity is high, to advantages such as the cement adaptability of different varieties are strong, is an innovation greatly that is applied in tunnel and the construction of tunnel wet shotcreting, economic and social benefit is huge.
Embodiment
Below in conjunction with embodiment, the specific embodiment of the present invention is elaborated.
Embodiment 1
The present invention is in concrete enforcement, by following weight percent meter: Tai-Ace S 150 40%, sodium aluminate 14%, sulfuric acid 2.95%, acrylamide and Sipacril 2739OF 0.05% and water 43% are made, wherein, Tai-Ace S 150 and sodium aluminate are added water, be mixed with the aqueous solution of Tai-Ace S 150 and sodium aluminate respectively; Under agitation, sodium aluminate aqueous solution is slowly joined in the aluminum sulfate aqueous solution, throw out Al (OH) is arranged
3Generate, add sulfuric acid again, regulating the pH value is 2～3, and is stirred to throw out Al (OH)
3Dissolving adds acrylamide and Sipacril 2739OF solution at last fully, stirs.
Embodiment 2
The present invention also can be by following weight percent meter in concrete enforcement: Tai-Ace S 150 45%, sodium aluminate 12%, phosphoric acid 3.5%, acrylamide and Sipacril 2739OF 0.5% and water 39% are made, wherein, Tai-Ace S 150 and sodium aluminate are added water, be mixed with the aqueous solution of Tai-Ace S 150 and sodium aluminate respectively; Under agitation, sodium aluminate aqueous solution is slowly joined in the aluminum sulfate aqueous solution, throw out Al (OH) is arranged
3Generate, add phosphoric acid again, regulating the pH value is 2～3, and is stirred to throw out Al (OH)
3Dissolving adds acrylamide and Sipacril 2739OF solution at last fully, stirs.
Embodiment 3
The present invention also can be by following weight percent meter in concrete enforcement: Tai-Ace S 150 50%, sodium aluminate 8%, hydrofluoric acid 3.7%, acrylamide and Sipacril 2739OF 0.3% and water 38% are made, wherein, Tai-Ace S 150 and sodium aluminate are added water, be mixed with the aqueous solution of Tai-Ace S 150 and sodium aluminate respectively; Under agitation, sodium aluminate aqueous solution is slowly joined in the aluminum sulfate aqueous solution, throw out Al (OH) is arranged
3Generate, add hydrofluoric acid again, regulating the pH value is 2～3, and is stirred to throw out Al (OH)
3Dissolving adds acrylamide and Sipacril 2739OF solution at last fully, stirs.
Embodiment 4
The present invention also can be by following weight percent meter in concrete enforcement: Tai-Ace S 150 55%, sodium aluminate 5%, hydrochloric acid 3.9%, acrylamide and Sipacril 2739OF 0.1% and water 36% are made, wherein, Tai-Ace S 150 and sodium aluminate are added water, be mixed with the aqueous solution of Tai-Ace S 150 and sodium aluminate respectively; Under agitation, sodium aluminate aqueous solution is slowly joined in the aluminum sulfate aqueous solution, throw out Al (OH) is arranged
3Generate, add sulfuric acid again, regulating the pH value is 2～3, and is stirred to throw out Al (OH)
3Dissolving adds acrylamide and Sipacril 2739OF solution at last fully, stirs.
The present invention has obtained satisfied technique effect through test and on probation, and the efficiency test data is as follows:
The test of cement paste time of coagulation and sand-cement slurry ultimate compression strength is carried out in requirement according to JC477-2005 " sprayed concrete accelerating chemicals ".Wherein low alkali liquid attitude accelerating chemicals consumption is according to the percentage calculation of cement weight.
Cement paste test time of coagulation:
Cement 400g
Water 160g
The sand-cement slurry intensity test:
Cement 900g
Standard sand 1350g
Water 450g
Experimental result is as shown in table 2.
Table 2 test-results
Show by above-mentioned data, liquid accelerator provided by the invention is mixing under 5～8% volumes of cement weight, can make and satisfy time of coagulation of cement paste the presetting period less than 5min, final setting time requirement less than 12min, mortar 1d ultimate compression strength is greater than 10MPa, the 28d compressive strength rate is greater than 100%, and have extraordinary cement adaptability, can make dissimilar cement satisfy the construction requirement of sprayed concrete.
In a word, the present invention compared with prior art has following useful technique effect:
1. adopt accelerator of the present invention, under 6% volume that adds cement weight, the concrete slurry springback capacity is 8.6% behind the wet shot of job site, and rebound degree is low, is conducive to shotcrete construction;
2. according to the experiment condition of JC477-2005, accelerator of the present invention can make ordinary cement initial set in 4 minutes, final set in 10 minutes at (cement weight 4～8%) under the lower volume;
3. according to the experiment condition of JC477-2005, accelerator of the present invention can make the 1d intensity of cement mortar reach more than the 12MPa, and the 28d compressive strength rate is greater than 100%. It is the greatly innovation in the building building cement rapid hardening construction.
Claims (7)
1. one kind low resilience high strength spray concrete liquid accelerator is characterized in that, by weight percent: Tai-Ace S 150 40～55%, sodium aluminate 5～15%, acid regulator 2～5%, acrylamide, Sipacril 2739OF 0.05～0.5%, surplus is that water is made;
Said acrylamide and Sipacril 2739OF solution are soluble in water by weight 1 ︰ 3～5, and its mass concentration is 5～10%, adds initiator then, and the initiator add-on is 5% of a multipolymer gross weight, polymerization 2～4h under 60～80 ℃ temperature;
Said Tai-Ace S 150 is technical grade Tai-Ace S 150, Al
2O
3Content for accelerating the dissolution rate of Tai-Ace S 150, can be selected sheet Tai-Ace S 150 greater than 15% for use; Said sodium aluminate is an industrial sodium aluminate, or by NaOH and Al (OH)
3Reaction makes, and requires Na
2O content 28～35%, Al
2O
3Content 40～50%; Said acid regulator is a hydrofluoric acid, or sulfuric acid, or hydrochloric acid, or phosphoric acid; Said initiator is ammonium persulphate or Sodium Persulfate or hydrogen peroxide.
2. low resilience high strength spray concrete liquid accelerator according to claim 1, it is characterized in that, said acrylamide and Sipacril 2739OF are 0.1～0.3% of this accelerating chemicals gross weight, Tai-Ace S 150 is 47～52% of this accelerating chemicals gross weight, and sodium aluminate is 7～12% of this accelerating chemicals gross weight.
3. the preparation method of the described low resilience high strength spray concrete liquid accelerator of claim 1 is characterized in that, the prescription by claim 1 provides adds water with Tai-Ace S 150 and sodium aluminate, is mixed with the aqueous solution of Tai-Ace S 150 and sodium aluminate respectively; Under agitation, sodium aluminate aqueous solution is slowly joined in the aluminum sulfate aqueous solution, throw out Al (OH) is arranged
3Generate, add acid regulator again, regulating the pH value is 2～3, and is stirred to throw out Al (OH)
3Dissolving adds acrylamide and Sipacril 2739OF solution more fully, stirs.
4. low resilience high strength spray concrete liquid accelerator according to claim 1, it is characterized in that, by following weight percent meter: Tai-Ace S 150 40%, sodium aluminate 14%, sulfuric acid 2.95%, acrylamide and Sipacril 2739OF 0.05% and water 43% are made, wherein, Tai-Ace S 150 and sodium aluminate are added water, be mixed with the aqueous solution of Tai-Ace S 150 and sodium aluminate respectively; Under agitation, sodium aluminate aqueous solution is slowly joined in the aluminum sulfate aqueous solution, throw out Al (OH) is arranged
3Generate, add sulfuric acid again, regulating the pH value is 2～3, and is stirred to throw out Al (OH)
3Dissolving adds acrylamide and Sipacril 2739OF solution at last fully, stirs.
5. low resilience high strength spray concrete liquid accelerator according to claim 1, it is characterized in that, by following weight percent meter: Tai-Ace S 150 45%, sodium aluminate 12%, phosphoric acid 3.5%, acrylamide and Sipacril 2739OF 0.5% and water 39% are made, wherein, Tai-Ace S 150 and sodium aluminate are added water, be mixed with the aqueous solution of Tai-Ace S 150 and sodium aluminate respectively; Under agitation, sodium aluminate aqueous solution is slowly joined in the aluminum sulfate aqueous solution, throw out Al (OH) is arranged
3Generate, add phosphoric acid again, regulating the pH value is 2～3, and is stirred to throw out Al (OH)
3Dissolving adds acrylamide and Sipacril 2739OF solution at last fully, stirs.
6. low resilience high strength spray concrete liquid accelerator according to claim 1, it is characterized in that, by following weight percent meter: Tai-Ace S 150 50%, sodium aluminate 8%, hydrofluoric acid 3.7%, acrylamide and Sipacril 2739OF 0.3% and water 38% are made, wherein, Tai-Ace S 150 and sodium aluminate are added water, be mixed with the aqueous solution of Tai-Ace S 150 and sodium aluminate respectively; Under agitation, sodium aluminate aqueous solution is slowly joined in the aluminum sulfate aqueous solution, throw out Al (OH) is arranged
3Generate, add hydrofluoric acid again, regulating the pH value is 2～3, and is stirred to throw out Al (OH)
3Dissolving adds acrylamide and Sipacril 2739OF solution at last fully, stirs.
7. low resilience high strength spray concrete liquid accelerator according to claim 1, it is characterized in that, by following weight percent meter: Tai-Ace S 150 55%, sodium aluminate 5%, hydrochloric acid 3.9%, acrylamide and Sipacril 2739OF 0.1% and water 36% are made, wherein, Tai-Ace S 150 and sodium aluminate are added water, be mixed with the aqueous solution of Tai-Ace S 150 and sodium aluminate respectively; Under agitation, sodium aluminate aqueous solution is slowly joined in the aluminum sulfate aqueous solution, throw out Al (OH) is arranged
3Generate, add sulfuric acid again, regulating the pH value is 2～3, and is stirred to throw out Al (OH)
3Dissolving adds acrylamide and Sipacril 2739OF solution at last fully, stirs.
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| CN201110113208.0A CN102219433B (en) | 2011-05-04 | 2011-05-04 | Low-resilience high-strength sprayed concrete liquid accelerating agent and preparation method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102584089A (en) * | 2012-03-05 | 2012-07-18 | 河南理工大学 | Formula for enhanced accelerating agent |
| CN103964730A (en) * | 2014-04-25 | 2014-08-06 | 山西金盾苑建材有限公 | Method for synthesizing liquid accelerator by adopting heat transfer oil for heating |
| CN104944829A (en) * | 2015-07-01 | 2015-09-30 | 芜湖市晨曦新型建材科技有限公司 | Cement accelerating admixture and preparation method thereof |
| CN106279496A (en) * | 2016-07-22 | 2017-01-04 | 重庆三圣特种建材股份有限公司 | Accelerator for concrete construction and preparation method thereof |
| CN106431059A (en) * | 2016-09-09 | 2017-02-22 | 山西科腾环保科技股份有限公司 | Alkali-free liquid accelerating agent for spraying concrete and preparing method thereof |
| CN108623741A (en) * | 2018-05-03 | 2018-10-09 | 北京工业大学 | A kind of organic low alkali accelerator of formation inierpeneirating network structure and preparation method thereof |
| CN111377654A (en) * | 2018-12-29 | 2020-07-07 | 江苏苏博特新材料股份有限公司 | Hybrid alkali-free accelerator and preparation method thereof |
| CN115572099A (en) * | 2022-10-25 | 2023-01-06 | 中铁十一局集团有限公司 | Normal-temperature preparation method of alkali-free liquid accelerator for quick-hardening early-strength sprayed concrete |
| CN116283042A (en) * | 2021-12-21 | 2023-06-23 | 中国科学院过程工程研究所 | Powdery concrete accelerator and preparation method and application thereof |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102584089A (en) * | 2012-03-05 | 2012-07-18 | 河南理工大学 | Formula for enhanced accelerating agent |
| CN103964730A (en) * | 2014-04-25 | 2014-08-06 | 山西金盾苑建材有限公 | Method for synthesizing liquid accelerator by adopting heat transfer oil for heating |
| CN103964730B (en) * | 2014-04-25 | 2016-02-03 | 山西金盾苑建材有限公司 | The method of heat-conducting oil heating synthetic fluid accelerating chemicals |
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| CN106431059A (en) * | 2016-09-09 | 2017-02-22 | 山西科腾环保科技股份有限公司 | Alkali-free liquid accelerating agent for spraying concrete and preparing method thereof |
| CN108623741A (en) * | 2018-05-03 | 2018-10-09 | 北京工业大学 | A kind of organic low alkali accelerator of formation inierpeneirating network structure and preparation method thereof |
| CN111377654A (en) * | 2018-12-29 | 2020-07-07 | 江苏苏博特新材料股份有限公司 | Hybrid alkali-free accelerator and preparation method thereof |
| CN111377654B (en) * | 2018-12-29 | 2021-11-09 | 江苏苏博特新材料股份有限公司 | Hybrid alkali-free accelerator and preparation method thereof |
| CN116283042A (en) * | 2021-12-21 | 2023-06-23 | 中国科学院过程工程研究所 | Powdery concrete accelerator and preparation method and application thereof |
| CN116283042B (en) * | 2021-12-21 | 2024-07-23 | 中国科学院过程工程研究所 | Powdery concrete accelerator and preparation method and application thereof |
| CN115572099A (en) * | 2022-10-25 | 2023-01-06 | 中铁十一局集团有限公司 | Normal-temperature preparation method of alkali-free liquid accelerator for quick-hardening early-strength sprayed concrete |
| CN115572099B (en) * | 2022-10-25 | 2023-06-16 | 中铁十一局集团有限公司 | Normal-temperature preparation method of alkali-free liquid accelerator for quick-hardening early-strength sprayed concrete |
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