CN109987966B - Concrete curing agent - Google Patents
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- CN109987966B CN109987966B CN201910332003.8A CN201910332003A CN109987966B CN 109987966 B CN109987966 B CN 109987966B CN 201910332003 A CN201910332003 A CN 201910332003A CN 109987966 B CN109987966 B CN 109987966B
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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
- C04B40/04—Preventing evaporation of the mixing water
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Abstract
The invention discloses a concrete curing agent which comprises the following components in parts by weight: 40-55 parts of high-molecular emulsion, 3-12 parts of film-forming agent and 2-6 parts of penetrating agent; the polymer emulsion comprises an inner core monomer, an outer crystal nucleus, an initiator and an emulsifier, wherein the inner core monomer comprises 1-2 parts by weight of styrene, 1-2 parts by weight of vinyl acetate and 5-8 parts by weight of ester components; the external crystal nucleus comprises 2-4 parts of fly ash, 3-5 parts of kaolinite powder, 2-3 parts of barite and 1-2 parts of chitosan in parts by weight; the weight ratio of the inner core monomer to the outer crystal nucleus is 10-20: 1. The concrete curing agent provided by the invention has the advantages of good stability, good continuity, good durability and high water retention rate, is not influenced by temperature and humidity in the process from initial setting to final setting of concrete, and does not have the phenomena of peeling, falling, cracking and the like.
Description
Technical Field
The invention relates to the technical field of building materials. More particularly, the invention relates to a concrete curing agent.
Background
The performance of concrete as one of the building materials with large dosage and wide application in the building engineering depends on the composition and the proportion of the concrete raw materials and further depends on the maintenance after pouring. The concrete is not cured or not cured in place after being poured, so that the water in the concrete is evaporated to the outside through the fine capillary holes of the system, and various performance indexes of the concrete are reduced. The traditional concrete curing method mainly comprises water curing, steam curing, landfill curing, straw bag paving and plastic film paving, and the curing method is time-consuming, labor-consuming, energy-consuming, unstable in curing effect, low in protection rate and poor in curing effect, cannot effectively block water evaporation, and cannot meet the requirements of the modern building industry.
The curing agent is applied to curing, after the concrete is constructed, a layer of chemical substance with film-forming property and permeability is sprayed or smeared on the surface of the concrete, and the chemical substance forms a layer of uniform and continuous compact film in a short time, so that the evaporation of water in the concrete is inhibited, and the full hydration of the cementing material is promoted. The oxidant presented in the market at present is influenced by temperature, and the phenomena of peeling, falling off and cracking are easy to occur.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
Still another object of the present invention is to provide a concrete curing agent which has good stability, good continuity, good durability, high water retention rate, and no peeling, falling off, cracking, etc. during the process from initial setting to final setting of concrete, without being affected by temperature and humidity.
To achieve these objects and other advantages in accordance with the present invention, there is provided a concrete curing agent comprising the following components in parts by weight:
40-55 parts of high-molecular emulsion, 3-12 parts of film-forming agent and 2-6 parts of penetrating agent;
the curing agent forms a continuous waterproof high-efficiency curing film on the surface layer of the concrete, prevents water from evaporating, can permeate into capillary holes of the concrete, reacts with cement hydration products to generate insoluble substances to block the capillary holes, blocks channels for outward evaporation of water in the capillary holes, can reduce the surface tension of the water in the capillary holes, reduces the additional pressure of the water in the capillary holes, reduces the drying shrinkage of the concrete, achieves good shrinkage reduction and water retention curing effects, and promotes the full hydration of the cement.
The polymer emulsion comprises a core monomer, an external crystal nucleus, an initiator and an emulsifier, wherein the core monomer comprises 1-2 parts by weight of styrene, 1-2 parts by weight of vinyl acetate and 5-8 parts by weight of ester components, and the ester components comprise one or more of methyl acrylate, ethyl acrylate, butyl acrylate, methyl methacrylate, ethyl methacrylate and butyl methacrylate; the external crystal nucleus comprises 2-4 parts of fly ash, 3-5 parts of kaolinite powder, 2-3 parts of barite and 1-2 parts of chitosan by weight, and the fly ash, the kaolinite powder and the barite are all ground into micro powder; the weight ratio of the inner core monomer to the outer crystal nucleus is 10-20: 1; the core monomer and the external crystal nucleus in the polymer emulsion form a net structure with different layers under the action of an initiator and an emulsifier, so that the barrier property of the curing agent is improved, the core monomer and the external crystal nucleus are combined into a film in different modes in the early stage of initial setting of concrete, the formed film has a physical film forming structure and a chemical film forming structure, the sensitivity of the curing agent to temperature and humidity is reduced, and the performance of the curing agent is not influenced even if the curing agent is used in a region with higher temperature; external crystal nuclei permeate into the concrete capillary at the initial setting later stage of the concrete, so that a channel for water evaporation of the capillary is blocked, and the efflorescence phenomenon of the capillary can be effectively prevented.
Wherein the penetrating agent comprises a lubricating component, a water-retaining component and a dispersing agent; the lubricating component comprises, by weight, 2-3 parts of latex powder, 20-30 parts of vegetable oil, 6-8 parts of phospholipid and 1-3 parts of emulsified silicone oil; the water retention component comprises, by weight, 8-14 parts of animal and plant fibers, 2-4 parts of lignin, 2-3 parts of hydroxymethyl cellulose, 2-3 parts of carboxymethyl cellulose, 2-3 parts of maltodextrin and 1-2 parts of polyacrylamide. The lubricating component can not only improve the continuity of the curing agent, but also reduce bubbles and reduce the performance of the curing agent in the process of preparing the curing agent. In areas with higher temperature or time periods with higher temperature, the moisture is increased too fast, and the water retention component can play a role in buffering, so that the risk of concrete cracking is reduced.
Preferably, the film forming agent is one or more of ethylene glycol, propylene glycol, petroleum ether, dibutyl phthalate, dodecyl alcohol ester and hexanediol butyl ether acetate.
Preferably, the initiator is one or more of potassium persulfate, sodium persulfate, dibenzoyl peroxide, azodiisobutyl amidine hydrochloride and fatty alcohol-polyoxyethylene ether.
Preferably, the emulsifier is nonylphenol polyoxyethylene ether or fatty alcohol polyoxyethylene ether.
Preferably, the dispersant comprises a polycarboxylate.
Preferably, the vegetable oil comprises one or more of soybean oil, sunflower oil, corn oil, olive oil, castor oil, peanut oil, sesame oil, linseed oil.
Preferably, the phospholipid includes any one of soybean lecithin, egg yolk lecithin and milk lecithin.
The invention further claims a preparation method of the concrete curing agent, which comprises the following steps:
step one, preparing a high polymer emulsion, weighing an inner core monomer, an outer crystal nucleus, an initiator and an emulsifier according to parts by weight, adding water which is 10-20 times of the weight of the emulsifier into the emulsifier, adding the inner core monomer, then stirring at a high speed of 600-1600 r/min for 20-30 min, then adding the first part of the initiator, continuing to stir at a high speed of 60-120 min, and stirring at a speed of 500-1600 r/min; adding external crystal nuclei, continuously stirring for 10-20 min at the stirring speed of 300-600 r/min, adding a second initiator, and continuously stirring for 120-360 min to obtain a polymer emulsion, wherein the stirring speed is not higher than 300 r/min; wherein the weight ratio of the first part of initiator to the second part of initiator is 10-20: 1; the inner core monomer and the outer crystal nucleus form a layered membrane structure at different stirring speeds, so that the continuity and the durability of the curing agent are improved.
Step two, preparing a penetrant, namely weighing the lubricating component, the water retention component and the dispersing agent in parts by weight, heating the lubricating component to 35-45 ℃, slowly adding the dispersing agent, cooling to room temperature, adding the water retention component, and fully stirring for 40-60 min to obtain the penetrant;
and step three, mixing the polymer emulsion obtained in the step one, the penetrating agent obtained in the step two and the film forming agent, and then fully stirring for 2-4 hours to obtain the concrete curing agent. When foaming occurs during the mixing process, some defoaming agents, such as polyoxyethylene polyoxypropylene amine ether, polyoxypropylene polyoxyethylene glycerol ether, dimethyl siloxane, polyoxypropylene glycerol ether, etc., may be added as appropriate.
Preferably, the stirring speed in the second step is 50-100 r/min.
Preferably, the stirring speed in the third step is 50-200 r/min.
The invention at least comprises the following beneficial effects: the concrete curing agent provided by the invention has the characteristics of good stability, good continuity, good durability and high water retention rate, is not influenced by temperature and humidity in the process from initial setting to final setting of concrete, and does not have the phenomena of peeling, falling, cracking and the like; the concrete curing agent provided by the invention has no volatile substances, is non-toxic and tasteless, has no pollution to the environment, is convenient to use, is suitable for concrete surface layers in various environments and conditions, and does not weaken the curing effect on newly poured concrete in a climate humid area or newly poured concrete in an area with higher temperature; the concrete curing agent provided by the invention is also beneficial to improving the strength of concrete and improving other physical properties of the concrete, such as the impermeability and crack resistance of the concrete.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Detailed Description
The present invention is further described in detail with reference to specific examples, so that those skilled in the art can implement the invention with reference to the description.
Example 1
Step one, preparing a high polymer emulsion, namely adding 20 times of water by weight of an emulsifier into the emulsifier according to the parts by weight of an inner core monomer, an external crystal nucleus, an initiator and the emulsifier, adding the inner core monomer, stirring at a high speed of 1600r/min for 30min, then adding the first initiator, and continuing to stir at a high speed for 120min at a stirring speed of 1600 r/min; adding external crystal nucleus, continuously stirring for 20min at the stirring speed of 600r/min, adding a second part of initiator, and continuously stirring for 360min to obtain a high-molecular emulsion, wherein the stirring speed is not higher than 300 r/min; wherein the weight ratio of the first part of initiator to the second part of initiator is 20: 1;
the polymer emulsion comprises an inner core monomer, an outer crystal nucleus, an initiator and an emulsifier, wherein the inner core monomer comprises 1 part of styrene, 1 part of vinyl acetate and 5 parts of methyl acrylate in parts by weight; the external crystal nucleus comprises 2 parts of fly ash, 3 parts of kaolinite powder, 2 parts of barite and 1 part of chitosan by weight, wherein the fly ash, the kaolinite powder and the barite are all ground into micro powder, and the particle size of the powder is 50-80 microns; the weight ratio of the inner core monomer to the outer crystal nucleus is 10: 1;
step two, preparing a penetrant, namely weighing the lubricating component, the water-retaining component and the dispersant in parts by weight, heating the lubricating component to 45 ℃, slowly adding the dispersant, cooling to room temperature, adding the water-retaining component, and fully stirring for 60min to obtain the penetrant;
wherein the penetrating agent comprises a lubricating component, a water-retaining component and a dispersing agent; the lubricating component comprises 2 parts of emulsion powder, 20 parts of vegetable oil, 6 parts of phospholipid and 1 part of emulsified silicone oil; the water retention component comprises 8 parts of animal and plant fibers, 2 parts of lignin, 2 parts of hydroxymethyl cellulose, 2 parts of carboxymethyl cellulose, 2 parts of maltodextrin and 1 part of polyacrylamide by weight;
and step three, mixing the polymer emulsion obtained in the step one, the penetrating agent obtained in the step two and the film forming agent, and then fully stirring for 4 hours to obtain the concrete curing agent.
Comparative example 1
Step one, preparing a high polymer emulsion, weighing a core monomer, an initiator and an emulsifier according to a ratio, adding water which is 20 times of the weight of the emulsifier into the emulsifier, adding the core monomer, stirring at a high speed of 1600r/min for 30min, adding the initiator, and continuing to stir at a high speed for 120min at a stirring speed of 1600 r/min; the polymer emulsion comprises a core monomer, an initiator and an emulsifier, wherein the core monomer is methyl acrylate, styrene and vinyl acetate;
step two, preparing a penetrant, weighing the lubricating component, the water-retaining component and the dispersant according to a proportion, heating the lubricating component to 45 ℃, slowly adding the dispersant, cooling to room temperature, adding the water-retaining component, and fully stirring for 60min to obtain the penetrant;
wherein the penetrating agent comprises a lubricating component, a water-retaining component and a dispersing agent; the lubricating component comprises 2 parts of emulsion powder, 20 parts of vegetable oil, 6 parts of phospholipid and 1 part of emulsified silicone oil; the water retention component comprises 8 parts of animal and plant fibers, 2 parts of lignin, 2 parts of hydroxymethyl cellulose, 2 parts of carboxymethyl cellulose, 2 parts of maltodextrin and 1 part of polyacrylamide by weight;
and step three, mixing the polymer emulsion obtained in the step one, the penetrating agent obtained in the step two and the film forming agent, and then fully stirring for 4 hours to obtain the concrete curing agent.
Comparative example 2
Step one, preparing a high polymer emulsion, weighing external crystal nuclei, an initiator and an emulsifier according to a ratio, adding water which is 20 times of the weight of the emulsifier into the emulsifier, adding the external crystal nuclei, stirring for 20min at a stirring speed of 600r/min, adding the initiator, and continuously stirring for 360min to obtain the high polymer emulsion, wherein the stirring speed is not higher than 300 r/min;
wherein the polymer emulsion comprises an external crystal nucleus, an initiator and an emulsifier; the external crystal nucleus comprises 2 parts of fly ash, 3 parts of kaolinite powder, 2 parts of barite and 1 part of chitosan by weight, wherein the fly ash, the kaolinite powder and the barite are all ground into micro powder, and the particle size of the powder is 50-80 microns;
step two, preparing a penetrant, weighing the lubricating component, the water-retaining component and the dispersant according to a proportion, heating the lubricating component to 45 ℃, slowly adding the dispersant, cooling to room temperature, adding the water-retaining component, and fully stirring for 60min to obtain the penetrant;
wherein the penetrating agent comprises a lubricating component, a water-retaining component and a dispersing agent; the lubricating component comprises 2 parts of emulsion powder, 20 parts of vegetable oil, 6 parts of phospholipid and 1 part of emulsified silicone oil; the water retention component comprises 8 parts of animal and plant fibers, 2 parts of lignin, 2 parts of hydroxymethyl cellulose, 2 parts of carboxymethyl cellulose, 2 parts of maltodextrin and 1 part of polyacrylamide by weight;
and step three, mixing the polymer emulsion obtained in the step one, the penetrating agent obtained in the step two and the film forming agent, and then fully stirring for 4 hours to obtain the concrete curing agent.
Comparative example 3
Step one, preparing a high-molecular emulsion, weighing a core monomer, an external crystal nucleus, an initiator and an emulsifier according to a ratio, adding water which is 20 times of the weight of the emulsifier into the emulsifier, adding the core monomer and the external crystal nucleus, stirring at a high speed of 1600r/min for 30min, adding a first part of the initiator, continuing stirring at a high speed of 120min, and stirring at a speed of 1600r/min to obtain the high-molecular emulsion;
the polymer emulsion comprises an inner core monomer, an outer crystal nucleus, an initiator and an emulsifier, wherein the inner core monomer comprises 1 part of styrene, 1 part of vinyl acetate and 5 parts of methyl acrylate in parts by weight; the external crystal nucleus comprises 2 parts of fly ash, 3 parts of kaolinite powder, 2 parts of barite and 1 part of chitosan by weight, wherein the fly ash, the kaolinite powder and the barite are all ground into micro powder, and the particle size of the powder is 50-80 microns; the weight ratio of the inner core monomer to the outer crystal nucleus is 10: 1;
step two, preparing a penetrant, weighing the lubricating component, the water-retaining component and the dispersant according to a proportion, heating the lubricating component to 45 ℃, slowly adding the dispersant, cooling to room temperature, adding the water-retaining component, and fully stirring for 60min to obtain the penetrant;
wherein the penetrating agent comprises a lubricating component, a water-retaining component and a dispersing agent; the lubricating component comprises 2 parts of emulsion powder, 20 parts of vegetable oil, 6 parts of phospholipid and 1 part of emulsified silicone oil; the water retention component comprises 8 parts of animal and plant fibers, 2 parts of lignin, 2 parts of hydroxymethyl cellulose, 2 parts of carboxymethyl cellulose, 2 parts of maltodextrin and 1 part of polyacrylamide by weight;
and step three, mixing the polymer emulsion obtained in the step one, the penetrating agent obtained in the step two and the film forming agent, and then fully stirring for 4 hours to obtain the concrete curing agent.
Comparative example 4
Step one, preparing a high polymer emulsion, weighing a core monomer, an external crystal nucleus, an initiator and an emulsifier according to a ratio, adding water which is 20 times of the weight of the emulsifier into the emulsifier, adding the core monomer, stirring at 1600r/min at a high speed for 30min, then adding a first part of the initiator, and continuing stirring at 1600r/min at a high speed for 120 min; adding external crystal nucleus, continuously stirring for 20min at the stirring speed of 600r/min, adding a second part of initiator, and continuously stirring for 360min to obtain a high-molecular emulsion, wherein the stirring speed is not higher than 300 r/min; wherein the weight ratio of the first part of initiator to the second part of initiator is 20: 1;
the polymer emulsion comprises an inner core monomer, an outer crystal nucleus, an initiator and an emulsifier, wherein the inner core monomer comprises 1 part of styrene, 1 part of vinyl acetate and 5 parts of methyl acrylate in parts by weight; the external crystal nucleus comprises 2 parts of fly ash, 3 parts of kaolinite powder, 2 parts of barite and 1 part of chitosan by weight, wherein the fly ash, the kaolinite powder and the barite are all ground into micro powder, and the particle size of the powder is 50-80 microns; the weight ratio of the inner core monomer to the outer crystal nucleus is 10: 1;
step two, preparing a penetrant, weighing the lubricating component and the dispersing agent according to a proportion, heating the lubricating component to 45 ℃, slowly adding the dispersing agent, cooling to room temperature, adding the water-retaining component, and fully stirring for 60min to obtain the penetrant;
wherein the penetrant comprises a lubricating component and a dispersant; the lubricating component comprises 2 parts of emulsion powder, 20 parts of vegetable oil, 6 parts of phospholipid and 1 part of emulsified silicone oil;
and step three, mixing the polymer emulsion obtained in the step one, the penetrating agent obtained in the step two and the film forming agent, and then fully stirring for 4 hours to obtain the concrete curing agent.
1. Performance index testing
Verifying the effective water retention rate of the concrete curing agent provided in the embodiment 1 and the comparative examples 1-4 according to a test method of JC 901-2002; carrying out concrete abrasion test according to JTJ 053; carrying out a concrete drying time test according to JC/T421; performing a concrete compressive strength ratio test according to JC 901-2002; the concrete penetration pressure ratio test is carried out according to JC 474-1999; the results of the above tests are shown in Table 1.
TABLE 1 test results of various properties of concrete
As can be seen from the comparison between example 1 and comparative example 1 in Table 1, the polymer emulsion without external crystal nuclei has inferior water retention, abrasion loss, compressive strength and osmotic pressure index to those of the curing agent with external crystal nuclei, especially abrasion loss, which is much higher than that of the curing agent with external crystal nuclei; compared with the comparative example 2, the core monomer has the largest influence on the curing agent, and the curing agent of the core monomer is not added, so that all indexes are poor; the comparison between the example 1 and the comparative example 3 shows that the effect of adding the initiator twice in the polymer emulsion is different from that of adding the initiator once, and obviously, the effect of adding the curing agent twice is better; the effect of the water-retaining component was examined in example 1 and comparative example 4, and it was found from the experimental results that the water-retaining component contributes to the improvement of the water-retaining rate.
2. Post-film-formation invasion solubility test
The curing agent obtained in the example 1 and the comparative examples 1 to 4 is coated on a board of 150mm multiplied by 200mm at one time according to the test dosage, after the curing agent is completely dried, the curing agent is immersed in water at the temperature of 20 +/-3 ℃ for 1 hour, 3 hours and 5 hours, whether the film is dissolved or not is observed, the curing agent is not dissolved in 3 time periods in the test of the example 1, and the curing agent is dissolved in different degrees in the comparative examples 1 to 4 after 3 hours.
3. Heat resistance test after film formation:
the curing agent obtained in the example 1 and the comparative examples 1 to 4 is coated on a glass plate according to the test dosage, after the curing agent is completely dried, the glass plate is placed in a drying box at the temperature of 65 +/-2 ℃, and after the temperature is kept for 30min, whether the melting and color change phenomena occur or not is observed, the results of the example 1 and the comparative example 4 are that the melting and color change phenomena do not occur, the melting of different degrees occurs in the comparative examples 1 to 3, and the color change phenomenon occurs in the comparative example 2.
4. Crack resistance test
The curing agent obtained in example 1 and comparative examples 1-4 is coated on concrete, the concrete is prevented from being placed in a curing box at 5 ℃, 25 ℃ and 35 ℃ for 28 days, the crack area of the curing agent is tested, the concrete coated with the curing agent obtained in example 1 cracks at three temperatures, and the crack area of comparative example 1 at 5 ℃ and 35 ℃ is 624mm2/m2And 735mm2/m2Comparative example 2 showed cracks at three temperatures, the cracks were particularly severe at 5 ℃ and 35 ℃, and comparative example 3 showed a crack area of 543mm at 5 ℃, 25 ℃ and 35 ℃2/m2、325mm2/m2And 455mm2/m2Comparative example 4 shows slight cracking at three temperatures.
Example 2
Step one, preparing a high-molecular emulsion, weighing a core monomer, an external crystal nucleus, an initiator and an emulsifier according to a ratio, adding 100 times of water by weight of the emulsifier into the emulsifier, adding the core monomer, stirring at a high speed of 600r/min for 20min, adding a first part of the initiator, and continuously stirring at a high speed of 500r/min for 60 min; adding external crystal nucleus, continuously stirring for 10min at the stirring speed of 300r/min, adding a second part of initiator, and continuously stirring for 120min to obtain a high-molecular emulsion, wherein the stirring speed is not higher than 300 r/min; wherein the weight ratio of the first part of initiator to the second part of initiator is 10: 1; the inner core monomer and the outer crystal nucleus form a layered membrane structure at different stirring speeds, so that the continuity and the durability of the curing agent are improved.
The polymer emulsion comprises an inner core monomer, an outer crystal nucleus, an initiator and an emulsifier, wherein the inner core monomer comprises 2 parts of styrene, 2 parts of vinyl acetate and 8 parts of ester components in parts by weight, and the ester components comprise methyl acrylate, ethyl methacrylate and butyl methacrylate; the external crystal nucleus comprises 4 parts of fly ash, 5 parts of kaolinite powder, 3 parts of barite and 2 parts of chitosan by weight, wherein the fly ash, the kaolinite powder and the barite are all ground into micro powder, and the particle size of the powder is 50-80 microns; the weight ratio of the inner core monomer to the outer crystal nucleus is 20:1
Step two, preparing a penetrant, weighing the lubricating component, the water-retaining component and the dispersing agent according to a proportion, heating the lubricating component to 35 ℃, slowly adding the dispersing agent, cooling to room temperature, adding the water-retaining component, and fully stirring for 40min to obtain the penetrant;
wherein the penetrating agent comprises a lubricating component, a water-retaining component and a dispersing agent; the lubricating component comprises 3 parts of emulsion powder, 30 parts of vegetable oil, 8 parts of phospholipid and 3 parts of emulsified silicone oil; the water retention component comprises 14 parts of animal and plant fibers, 2-4 parts of lignin, 3 parts of hydroxymethyl cellulose, 3 parts of carboxymethyl cellulose, 3 parts of maltodextrin and 2 parts of polyacrylamide by weight;
and step three, mixing the polymer emulsion obtained in the step one, the penetrating agent obtained in the step two and the film forming agent, and then fully stirring for 2 hours to obtain the concrete curing agent. When foaming occurs during the mixing process, some defoaming agents, such as polyoxyethylene polyoxypropylene amine ether, polyoxypropylene polyoxyethylene glycerol ether, dimethyl siloxane, polyoxypropylene glycerol ether, etc., may be added as appropriate.
Example 3
Step one, preparing a high-molecular emulsion, weighing a core monomer, an external crystal nucleus, an initiator and an emulsifier according to a ratio, adding water which is 12 times of the weight of the emulsifier into the emulsifier, adding the core monomer, stirring at a high speed of 800r/min for 23min, adding a first part of the initiator, and continuously stirring at a high speed of 800r/min for 100 min; adding external crystal nucleus, continuously stirring for 15min at the stirring speed of 400r/min, adding a second part of initiator, and continuously stirring for 260min to obtain a high-molecular emulsion, wherein the stirring speed is not higher than 300 r/min; wherein the weight ratio of the first part of initiator to the second part of initiator is 15: 1; the inner core monomer and the outer crystal nucleus form a layered membrane structure at different stirring speeds, so that the continuity and the durability of the curing agent are improved.
The polymer emulsion comprises an inner core monomer, an outer crystal nucleus, an initiator and an emulsifier, wherein the inner core monomer comprises 1 part of styrene, 1 part of vinyl acetate and 6 parts of ester components in parts by weight, and the ester components comprise butyl acrylate, methyl methacrylate and butyl methacrylate; the external crystal nucleus comprises 3 parts of fly ash, 4 parts of kaolinite powder, 2 parts of barite and 2 parts of chitosan by weight, wherein the fly ash, the kaolinite powder and the barite are all ground into micro powder, and the particle size of the powder is 50-80 microns; the weight ratio of the inner core monomer to the outer crystal nucleus is 15: 1;
step two, preparing a penetrant, weighing the lubricating component, the water-retaining component and the dispersing agent according to a proportion, heating the lubricating component to 40 ℃, slowly adding the dispersing agent, cooling to room temperature, adding the water-retaining component, and fully stirring for 50min to obtain the penetrant;
wherein the penetrating agent comprises a lubricating component, a water-retaining component and a dispersing agent; the lubricating component comprises 2 parts of emulsion powder, 15 parts of vegetable oil, 7 parts of phospholipid and 2 parts of emulsified silicone oil; the water retention component comprises 10 parts of animal and plant fibers, 3 parts of lignin, 2 parts of hydroxymethyl cellulose, 3 parts of carboxymethyl cellulose, 3 parts of maltodextrin and 1 part of polyacrylamide by weight;
and step three, mixing the polymer emulsion obtained in the step one, the penetrating agent obtained in the step two and the film forming agent, and then fully stirring for 3 hours to obtain the concrete curing agent. When foaming occurs during the mixing process, some defoaming agents, such as polyoxyethylene polyoxypropylene amine ether, polyoxypropylene polyoxyethylene glycerol ether, dimethyl siloxane, polyoxypropylene glycerol ether, etc., may be added as appropriate.
Example 4
Step one, preparing a high polymer emulsion, weighing a core monomer, an external crystal nucleus, an initiator and an emulsifier according to a ratio, adding 15 times of water by weight of the emulsifier into the emulsifier, adding the core monomer, stirring at a high speed of 1400r/min for 18min, then adding a first part of the initiator, and continuing to stir at a high speed for 800min at a stirring speed of 1200 r/min; adding external crystal nucleus, continuously stirring for 13min at the stirring speed of 400r/min, adding a second part of initiator, and continuously stirring for 300min to obtain a high-molecular emulsion, wherein the stirring speed is not higher than 300 r/min; wherein the weight ratio of the first part of initiator to the second part of initiator is 18: 1; the inner core monomer and the outer crystal nucleus form a layered membrane structure at different stirring speeds, so that the continuity and the durability of the curing agent are improved.
The polymer emulsion comprises an inner core monomer, an outer crystal nucleus, an initiator and an emulsifier, wherein the inner core monomer comprises 1 part of styrene, 2 parts of vinyl acetate and 7 parts of ester components in parts by weight, and the ester components comprise methyl acrylate, butyl acrylate, methyl methacrylate and ethyl methacrylate; the external crystal nucleus comprises 3 parts of fly ash, 5 parts of kaolinite powder, 3 parts of barite and 1 part of chitosan by weight, wherein the fly ash, the kaolinite powder and the barite are all ground into micro powder, and the particle size of the powder is 50-80 microns; the weight ratio of the inner core monomer to the outer crystal nucleus is 18: 1;
step two, preparing a penetrant, weighing the lubricating component, the water-retaining component and the dispersing agent according to a proportion, heating the lubricating component to 45 ℃, slowly adding the dispersing agent, cooling to room temperature, adding the water-retaining component, and fully stirring for 50min to obtain the penetrant;
wherein the penetrating agent comprises a lubricating component, a water-retaining component and a dispersing agent; the lubricating component comprises 2 parts of emulsion powder, 18 parts of vegetable oil, 8 parts of phospholipid and 2 parts of emulsified silicone oil; the water retention component comprises 12 parts of animal and plant fibers, 3 parts of lignin, 3 parts of hydroxymethyl cellulose, 3 parts of carboxymethyl cellulose, 3 parts of maltodextrin and 2 parts of polyacrylamide by weight;
and step three, mixing the polymer emulsion obtained in the step one, the penetrating agent obtained in the step two and the film forming agent, and then fully stirring for 3.5 hours to obtain the concrete curing agent. When foaming occurs during the mixing process, some defoaming agents, such as polyoxyethylene polyoxypropylene amine ether, polyoxypropylene polyoxyethylene glycerol ether, dimethyl siloxane, polyoxypropylene glycerol ether, etc., may be added as appropriate.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable to various fields of endeavor for which the invention is intended, and further modifications may readily occur to those skilled in the art, whereby the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (7)
1. The concrete curing agent is characterized by comprising the following components in parts by weight:
40-55 parts of high-molecular emulsion, 3-12 parts of film-forming agent and 2-6 parts of penetrating agent;
the polymer emulsion is composed of an inner core monomer, an external crystal nucleus, an initiator and an emulsifier, wherein the inner core monomer is composed of 1-2 parts by weight of styrene, 1-2 parts by weight of vinyl acetate and 5-8 parts by weight of ester components, and the ester components comprise one or more of methyl acrylate, ethyl acrylate, butyl acrylate, methyl methacrylate, ethyl methacrylate and butyl methacrylate; the external crystal nucleus is composed of 2-4 parts of fly ash, 3-5 parts of kaolinite powder, 2-3 parts of barite and 1-2 parts of chitosan in parts by weight, and the fly ash, the kaolinite powder and the barite are all ground into micro powder; the weight ratio of the inner core monomer to the outer crystal nucleus is 10-20: 1;
wherein the penetrating agent comprises a lubricating component, a water-retaining component and a dispersing agent; the lubricating component comprises, by weight, 2-3 parts of emulsion powder, 20-30 parts of vegetable oil, 6-8 parts of phospholipid and 1-3 parts of emulsified silicone oil; the water retention component comprises 8-14 parts of animal and plant fibers, 2-4 parts of lignin, 2-3 parts of hydroxymethyl cellulose, 2-3 parts of carboxymethyl cellulose, 2-3 parts of maltodextrin and 1-2 parts of polyacrylamide in parts by weight;
the preparation method of the concrete curing agent comprises the following steps:
step one, preparing a high polymer emulsion, weighing an inner core monomer, an outer crystal nucleus, an initiator and an emulsifier according to parts by weight, adding water which is 10-20 times of the weight of the emulsifier into the emulsifier, adding the inner core monomer, then stirring at a high speed of 600-1600 r/min for 20-30 min, then adding the first part of the initiator, continuing to stir at a high speed of 60-120 min, and stirring at a speed of 500-1600 r/min; adding external crystal nuclei, continuously stirring for 10-20 min at the stirring speed of 300-600 r/min, adding a second initiator, and continuously stirring for 120-360 min to obtain a polymer emulsion, wherein the stirring speed is not higher than 300 r/min; wherein the weight ratio of the first part of initiator to the second part of initiator is 10-20: 1;
step two, preparing a penetrant, namely weighing a lubricating component, a water retention component and a dispersing agent in parts by weight, heating the lubricating component to 35-45 ℃, slowly adding the dispersing agent, cooling to room temperature, adding the water retention component, and fully stirring for 40-60 min to obtain the penetrant, wherein the stirring speed is 50-100 r/min;
and step three, mixing the polymer emulsion obtained in the step one, the penetrating agent obtained in the step two and the film forming agent, and then fully stirring for 2-4 hours to obtain the concrete curing agent, wherein the stirring speed is 50-200 r/min.
2. The concrete curing agent of claim 1, wherein the film forming agent is one or more of ethylene glycol, propylene glycol, petroleum ether, dibutyl phthalate, dodecyl alcohol ester, and hexylene glycol butyl ether acetate.
3. The concrete curing agent of claim 1, wherein the initiator is one or more of potassium persulfate, sodium persulfate, dibenzoyl peroxide, azobisisobutylamidine hydrochloride, and fatty alcohol polyoxyethylene ether.
4. The concrete curing agent of claim 1, wherein the emulsifier is nonylphenol polyoxyethylene ether or fatty alcohol polyoxyethylene ether.
5. The concrete curing agent of claim 1, wherein the dispersant is a polycarboxylate.
6. The concrete conditioner of claim 1, wherein said vegetable oil comprises one or more of soybean oil, sunflower oil, corn oil, olive oil, castor oil, peanut oil, sesame oil, linseed oil.
7. The concrete curing agent of claim 1, wherein the phospholipid comprises any one of soybean lecithin, egg yolk lecithin and milk lecithin.
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| CN111269025B (en) * | 2020-02-04 | 2021-11-16 | 北京建筑大学 | Lithium-based penetrating fluid modified concrete surface reinforcing agent and preparation and use methods thereof |
| CN113416091B (en) * | 2021-07-05 | 2022-07-12 | 江西省圣源商品混凝土有限公司 | Concrete curing agent |
| CN113636782B (en) * | 2021-09-03 | 2023-05-05 | 山东高速集团有限公司创新研究院 | Modified nano protective agent and preparation method and application thereof |
| CN114395296B (en) * | 2021-12-28 | 2023-06-09 | 杭州建工建材有限公司 | Curing agent for concrete and preparation method thereof |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101298373A (en) * | 2008-06-27 | 2008-11-05 | 辽宁省建设科学研究院 | Novel modified emulsifying olefin concrete curing agent |
| CN101348348A (en) * | 2008-09-01 | 2009-01-21 | 南京派尼尔科技实业有限公司 | High moisture retention concrete curing agent |
| CN101531482A (en) * | 2009-04-22 | 2009-09-16 | 江苏鼎达建材有限公司 | Shrinkage reducing and curing agent for concrete |
| CN102976652A (en) * | 2012-11-01 | 2013-03-20 | 江苏博特新材料有限公司 | Concrete maintenance agent having high water retention rate, and its preparation method |
| CN103408324A (en) * | 2013-08-22 | 2013-11-27 | 江苏博特新材料有限公司 | Method for preparing concrete curing compound |
| CN103964893A (en) * | 2014-04-25 | 2014-08-06 | 交通运输部公路科学研究所 | Early-strength wear-resistant concrete curing agent, as well as preparation method and application thereof |
| CN106146036A (en) * | 2016-06-28 | 2016-11-23 | 中国路桥工程有限责任公司 | Curing compound |
| CN107010995A (en) * | 2017-04-14 | 2017-08-04 | 农文书 | The preparation method of curing compound with nano material |
| CN107867877A (en) * | 2017-09-25 | 2018-04-03 | 安徽砀山金兄弟实业科技有限公司 | A kind of curing compound |
| WO2018095011A1 (en) * | 2016-11-25 | 2018-05-31 | 深圳大学 | Concrete protective agent and preparation method therefor, and concrete protective film and preparation method therefor |
| CN108164287A (en) * | 2017-12-29 | 2018-06-15 | 常州达奥新材料科技有限公司 | A kind of permanent seal cooling curing compound |
| CN108424173A (en) * | 2018-04-25 | 2018-08-21 | 常州五荣化工有限公司 | A kind of outer curing agent of concrete |
| CN108794063A (en) * | 2018-07-27 | 2018-11-13 | 刘翠芬 | Concrete autogenous curing agent and preparation method thereof and application method |
| CN109608090A (en) * | 2019-01-18 | 2019-04-12 | 广州华隆建筑材料有限公司 | A kind of curing compound and preparation method thereof |
-
2019
- 2019-04-24 CN CN201910332003.8A patent/CN109987966B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101298373A (en) * | 2008-06-27 | 2008-11-05 | 辽宁省建设科学研究院 | Novel modified emulsifying olefin concrete curing agent |
| CN101348348A (en) * | 2008-09-01 | 2009-01-21 | 南京派尼尔科技实业有限公司 | High moisture retention concrete curing agent |
| CN101531482A (en) * | 2009-04-22 | 2009-09-16 | 江苏鼎达建材有限公司 | Shrinkage reducing and curing agent for concrete |
| CN102976652A (en) * | 2012-11-01 | 2013-03-20 | 江苏博特新材料有限公司 | Concrete maintenance agent having high water retention rate, and its preparation method |
| CN103408324A (en) * | 2013-08-22 | 2013-11-27 | 江苏博特新材料有限公司 | Method for preparing concrete curing compound |
| CN103964893A (en) * | 2014-04-25 | 2014-08-06 | 交通运输部公路科学研究所 | Early-strength wear-resistant concrete curing agent, as well as preparation method and application thereof |
| CN106146036A (en) * | 2016-06-28 | 2016-11-23 | 中国路桥工程有限责任公司 | Curing compound |
| WO2018095011A1 (en) * | 2016-11-25 | 2018-05-31 | 深圳大学 | Concrete protective agent and preparation method therefor, and concrete protective film and preparation method therefor |
| CN107010995A (en) * | 2017-04-14 | 2017-08-04 | 农文书 | The preparation method of curing compound with nano material |
| CN107867877A (en) * | 2017-09-25 | 2018-04-03 | 安徽砀山金兄弟实业科技有限公司 | A kind of curing compound |
| CN108164287A (en) * | 2017-12-29 | 2018-06-15 | 常州达奥新材料科技有限公司 | A kind of permanent seal cooling curing compound |
| CN108424173A (en) * | 2018-04-25 | 2018-08-21 | 常州五荣化工有限公司 | A kind of outer curing agent of concrete |
| CN108794063A (en) * | 2018-07-27 | 2018-11-13 | 刘翠芬 | Concrete autogenous curing agent and preparation method thereof and application method |
| CN109608090A (en) * | 2019-01-18 | 2019-04-12 | 广州华隆建筑材料有限公司 | A kind of curing compound and preparation method thereof |
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|---|---|
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