CN115784770A - Anti-carbonization concrete curing agent and preparation method thereof - Google Patents
Anti-carbonization concrete curing agent and preparation method thereof Download PDFInfo
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- CN115784770A CN115784770A CN202211226482.3A CN202211226482A CN115784770A CN 115784770 A CN115784770 A CN 115784770A CN 202211226482 A CN202211226482 A CN 202211226482A CN 115784770 A CN115784770 A CN 115784770A
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- Prior art keywords
- curing agent
- solution
- ammonia complex
- carbonization
- concrete curing
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- 238000003763 carbonization Methods 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000000243 solution Substances 0.000 claims abstract description 37
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 28
- QKSIFUGZHOUETI-UHFFFAOYSA-N copper;azane Chemical compound N.N.N.N.[Cu+2] QKSIFUGZHOUETI-UHFFFAOYSA-N 0.000 claims abstract description 20
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 14
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000012047 saturated solution Substances 0.000 claims abstract description 13
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 8
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims abstract description 7
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims abstract description 7
- 239000001099 ammonium carbonate Substances 0.000 claims abstract description 7
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims abstract description 7
- 229910000365 copper sulfate Inorganic materials 0.000 claims abstract description 6
- 239000002244 precipitate Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- JJLJMEJHUUYSSY-UHFFFAOYSA-L Copper hydroxide Chemical compound [OH-].[OH-].[Cu+2] JJLJMEJHUUYSSY-UHFFFAOYSA-L 0.000 claims description 2
- 239000005750 Copper hydroxide Substances 0.000 claims description 2
- 229910001956 copper hydroxide Inorganic materials 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 239000004566 building material Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 239000001569 carbon dioxide Substances 0.000 abstract description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 2
- 230000003628 erosive effect Effects 0.000 abstract description 2
- 238000006703 hydration reaction Methods 0.000 abstract description 2
- 230000001651 autotrophic effect Effects 0.000 abstract 1
- 230000000903 blocking effect Effects 0.000 abstract 1
- 238000001704 evaporation Methods 0.000 abstract 1
- 230000036571 hydration Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 239000012496 blank sample Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the technical field of building materials, and particularly relates to an anti-carbonization concrete curing agent and a preparation method thereof. The invention utilizes copper sulfate saturated solution and ammonium bicarbonate saturated solution to prepare copper ammonia complex solution, the obtained copper ammonia complex solution is mixed with water glass with the modulus of about 3.2 and the Baume degree of 30-40 according to a certain method to obtain the curing agent, and the components and the weight percentage content of the curing agent are respectively as follows: 1.2% copper ammonia complex solution and 98.8% water glass. The principle of the curing agent provided by the invention is that a layer of film is formed on the surface to prevent the water in the concrete from evaporating, so that the sufficient hydration is ensured and the autotrophic purpose is achieved; the film also has certain effect of blocking the erosion of carbon dioxide, and can effectively reduce the carbonization depth. The invention has simple production process, low cost and obvious protection effect, is very suitable for the maintenance of common concrete engineering and has wide application market.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to an anti-carbonization concrete curing agent and a preparation method thereof.
Background
The concrete is an indispensable important building material for civil engineering at present, and has the characteristics of rich raw materials, high compressive strength, good durability and simple production process. The characteristics lead the concrete to be widely applied in the building field, and the consumption is very large. In order to guarantee the quality safety of concrete construction engineering, the rebound value and the carbonization depth value are measured by related departments strictly according to the industrial standard JGJ/T23-2011 of the people's republic of China when the engineering is accepted, so that the strength conversion value of the concrete is obtained. Therefore, the rebound strength and the carbonization depth are key indexes for passing engineering acceptance. However, many construction units have poor maintenance awareness and uneven maintenance level, and some construction units do not even make any maintenance measures. Due to lack of maintenance measures, the water on the surface of the concrete is dispersed and lost too fast, and the cement cannot be fully hydrated, so that the later rebound value is low; and because of lack of maintenance, the carbon dioxide erosion is easier, the carbonization depth value is too high, and the final strength conversion value does not meet the acceptance requirement.
As the acceptance standard is strict, on one hand, many construction units need to ensure qualified rebound strength and carbonization depth value, and on the other hand, the maintenance work is also expected to be lightened, so that the maintenance is carried out by using a maintenance agent with willingness; meanwhile, some business enterprises are willing to additionally undertake maintenance work as after-sales service based on the current situation that maintenance levels of construction parties are uneven. However, the cost of the existing curing agent is too high, and construction units and commercial enterprises are unwilling to bear; some components are complex and production is troublesome, finished products are difficult to purchase in the market, and the complex components and the complicated process can not be produced by enterprises. Therefore, the produced concrete curing agent has the advantages of easily obtained raw materials, simple components, easy production, low price and obvious improvement on the resilience strength and the carbonization depth value, and has great market prospect.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an anti-carbonization concrete curing agent and a preparation method thereof, and solves the problems of high cost, complex components, complicated production and difficult production of the existing curing agent.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the anti-carbonization concrete curing agent is prepared from the following components in percentage by weight: 1-2% of copper ammonia complex solution and 98-99% of water glass.
Preferably, the copper ammonia complex solution is prepared by mixing a copper sulfate saturated solution and an ammonium bicarbonate saturated solution in a ratio of 2.
Preferably, the preparation method of the copper ammonia complex solution comprises the following steps:
adding thirteen parts of saturated ammonium bicarbonate solution into two parts of saturated copper sulfate solution, stirring while adding, beginning to generate copper hydroxide precipitate, continuously adding the saturated ammonium bicarbonate solution, and completely eliminating the precipitate to finally form a transparent blue solution, namely a copper ammonia complex solution.
Preferably, the water glass has the modulus of 3-3.5 and the Baume degree of 30-40.
The preparation method of the anti-carbonization concrete curing agent comprises the following steps:
the method comprises the following steps: weighing or preparing the components according to the proportion;
step two: spraying the copper ammonia complex solution by a sprayer, gradually adding the solution into water glass while stirring until the solution is uniformly stirred to form a blue solution;
step three: and (5) standing the solution obtained in the step two for one day until the precipitate is completely dissolved, thus obtaining the anti-carbonization concrete curing agent.
(III) advantageous effects
The invention provides an anti-carbonization concrete curing agent and a preparation method thereof. The method has the following beneficial effects:
1. the anti-carbonization capability of the concrete is improved, and the carbonization depth can be reduced by 2mm at most.
2. The equivalent value of the concrete resilience strength under the same curing condition can be improved by 5MPa at most.
3. By adding the copper ammonia complex solution, a compact protective layer is formed together with the water glass, so that the water loss in the concrete is prevented, and the hydration reaction of cement in the concrete is ensured to be smoothly carried out.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The anti-carbonization concrete curing agent comprises the following raw materials in percentage by weight:
1.2% of copper ammonia complex solution;
98.8 percent of water glass.
The copper ammonia complex solution is prepared from a copper sulfate saturated solution and an ammonium bicarbonate saturated solution according to the weight ratio of 2; the water glass modulus is 3.2, and the Baume degree is 30.
The preparation process of the anti-carbonization concrete curing agent comprises the following steps:
the method comprises the following steps: weighing or preparing the components according to the proportion;
step two: spraying the copper ammonia complex solution by a sprayer, gradually adding the solution into water glass while stirring until the solution is uniformly stirred to form a blue solution;
step three: and in the second step, a small amount of silica sol is precipitated due to the precipitation of silica sol caused by too high local concentration of copper ammonia complex ions, and the solution obtained in the second step is kept stand for one day until the precipitate is completely dissolved, so that the anti-carbonization concrete curing agent is prepared.
Example 2
The anti-carbonization concrete curing agent comprises the following raw materials in percentage by weight:
1.2% of copper ammonia complex solution;
98.8 percent of water glass.
The copper ammonia complex solution is prepared from a copper sulfate saturated solution and an ammonium bicarbonate saturated solution according to the weight ratio of 2; the water glass modulus is 3.2, and the Baume degree is 40.
Application examples
The anti-carbonization concrete curing agent in the embodiment 1-2 is uniformly sprayed on the surface of the pumping concrete sample after the form removal, the surface is re-sprayed once after being dried, a comparison experiment is carried out with the pumping concrete sample without the curing agent, and the embodiment and a blank sample are cured under the same conditions outdoors. The concrete resilience strength test and the carbonization depth value measurement are carried out according to JGJ/T23-2011 technical specification for testing the concrete compressive strength by a resilience method, and the strength of the test area is converted according to the industry standard appendix.
TABLE 1 dosage of each material/(kg/m 3) of pump concrete
| Cement | Mineral powder | Fly ash | Machine-made sand | Crushing stone | Water (I) | Additive agent |
| 230 | 70 | 70 | 850 | 900 | 170 | 8 |
The experimental results are as follows:
TABLE 2 conversion values of rebound strength, carbonization depth value and test area strength of pump concrete
| Numbering | 28d rebound Strength (MPa) | Carbonized depth value (mm) | Conversion value of Strength (MPa) |
| Blank sample | 30.2 | 4.5 | 21.4 |
| Example 1 | 30.9 | 2.0 | 24.8 |
| Example 2 | 32.0 | 1.5 | 27.0 |
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The anti-carbonization concrete curing agent is characterized by being prepared from the following components in percentage by weight: 1-2% of copper ammonia complex solution and 98-99% of water glass.
2. The carbonation concrete curing agent according to claim 1, wherein: the copper ammonia complex solution is prepared from a copper sulfate saturated solution and an ammonium bicarbonate saturated solution according to the proportion of 2.
3. The carbonation-resistant concrete curing agent according to claim 1, wherein: the preparation method of the copper ammonia complex solution comprises the following steps: adding the saturated solution of ammonium bicarbonate into the saturated solution of copper sulfate while stirring, beginning to generate copper hydroxide precipitate, continuously adding the saturated solution of ammonium bicarbonate, and completely eliminating the precipitate to finally form a transparent blue solution, namely a copper ammonia complex solution.
4. The carbonation concrete curing agent according to claim 1, wherein: the water glass has the modulus of 3-3.5 and the Baume degree of 30-40.
5. The method for preparing the carbonation concrete curing agent according to any one of claims 1 to 4, comprising the steps of:
the method comprises the following steps: weighing or preparing the components according to the proportion;
step two: spraying the copper ammonia complex solution by a sprayer, gradually adding the solution into water glass while stirring until the solution is uniformly stirred to form a blue solution;
step three: and (5) standing the solution obtained in the step two for one day until the precipitate is completely dissolved, thus obtaining the anti-carbonization concrete curing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211226482.3A CN115784770A (en) | 2022-10-09 | 2022-10-09 | Anti-carbonization concrete curing agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211226482.3A CN115784770A (en) | 2022-10-09 | 2022-10-09 | Anti-carbonization concrete curing agent and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115784770A true CN115784770A (en) | 2023-03-14 |
Family
ID=85432629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211226482.3A Pending CN115784770A (en) | 2022-10-09 | 2022-10-09 | Anti-carbonization concrete curing agent and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115784770A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012025622A (en) * | 2010-07-23 | 2012-02-09 | Zenichi Tsuruharatani | Method for curing concrete |
| CN102674886A (en) * | 2012-05-31 | 2012-09-19 | 广西大学 | Process for preparing water glass based concrete curing and reinforcing agent |
| CN103058544A (en) * | 2012-12-24 | 2013-04-24 | 浙江工业大学 | Bi-component curing agent used for cement concrete and application thereof |
| CN109485458A (en) * | 2019-01-23 | 2019-03-19 | 济南大学 | A kind of maritime concrete surface reinforcing agent and preparation method thereof |
-
2022
- 2022-10-09 CN CN202211226482.3A patent/CN115784770A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012025622A (en) * | 2010-07-23 | 2012-02-09 | Zenichi Tsuruharatani | Method for curing concrete |
| CN102674886A (en) * | 2012-05-31 | 2012-09-19 | 广西大学 | Process for preparing water glass based concrete curing and reinforcing agent |
| CN103058544A (en) * | 2012-12-24 | 2013-04-24 | 浙江工业大学 | Bi-component curing agent used for cement concrete and application thereof |
| CN109485458A (en) * | 2019-01-23 | 2019-03-19 | 济南大学 | A kind of maritime concrete surface reinforcing agent and preparation method thereof |
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Application publication date: 20230314 |