CN114230230B - Machine-made sand regulator and preparation method and application thereof - Google Patents
Machine-made sand regulator and preparation method and application thereof Download PDFInfo
- Publication number
- CN114230230B CN114230230B CN202111589077.3A CN202111589077A CN114230230B CN 114230230 B CN114230230 B CN 114230230B CN 202111589077 A CN202111589077 A CN 202111589077A CN 114230230 B CN114230230 B CN 114230230B
- Authority
- CN
- China
- Prior art keywords
- machine
- made sand
- parts
- concrete
- regulator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
Landscapes
- 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)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention provides a machine-made sand regulator and a preparation method and application thereof. The machine-made sand regulator provided by the invention can improve the strength, the dispersibility and the working performance of concrete, is suitable for different machine-made sand materials, and particularly has excellent adaptability to machine-made sand with step matching and large mud and powder content. In addition, the machine-made sand regulator provided by the invention can improve the adaptability and the action effect of the concrete admixture.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a machine-made sand regulator and a preparation method and application thereof.
Background
As the demand for concrete is getting larger and larger, the machine-made sand gradually becomes a substitute for natural sand due to limited storage of natural sand. The mechanical sand is prepared by mechanically crushing and screening mother rock ore without weathered products to form stone particles with smaller particle size, and has wide source, low cost, large yield, small influence on the environment and easy regulation of gradation, so the mechanical sand has better application prospect as concrete fine aggregate.
However, compared with natural sand, machine-made sand still has obvious gap, and is especially obvious in disadvantage on indexes such as grain composition and mud and powder content, and the like, and when the machine-made sand is used as fine aggregate, uncontrollable factors of concrete production are increased, and the probability of various problems of concrete is increased, for example, the problems of concrete material dispersion, additive mixing amount increase, concrete loss increase with time and the like caused by poor wrapping of concrete prepared by the machine-made sand are solved. Therefore, a suitable conditioning agent is required to condition the machine-made sand.
CN112794675A discloses a machine-made sand regulator and a use method thereof, wherein the machine-made sand regulator comprises, by mass, 150-200 parts of a water reducing agent, 18-20 parts of an air entraining agent, 10-30 parts of polyethylene glycol, 7-20 parts of ethylene glycol and 7-15 parts of polydimethylsiloxane. The machine-made sand regulator can improve the workability of machine-made sand and the overall processability of concrete.
CN110655346A discloses a machine-made sand regulator and a preparation method thereof, wherein the machine-made sand regulator comprises, by mass, 1-5% of a polycarboxylic acid water reducing agent, 5-10% of a glue reducing agent, 3-10% of an early strength agent, 0.01-0.5% of an air entraining agent, 0.05-0.8% of a polyether type defoaming agent, 0.4-3.5% of a compact repairing agent, 0.05-2% of a viscosity thixotropic agent and the balance of water. The machine-made sand regulator can control the better working performance of concrete and can ensure the durability requirement of the concrete.
CN110655619A discloses a preparation method of a machine-made sand conditioner, which comprises the following steps: adding water into an esterified monomer to dilute the esterified monomer into a solution with the mass concentration of 45-55%, cooling the solution to 13-17 ℃ by using ice water, and adding hydroxyethyl acrylate, acrylamide methylpropanesulfonic acid and an oxidant; then dropwise adding a mixed solution of a catalyst, a reducing agent and a chain transfer agent for 0.5-1 hour; and finally, preserving the heat for 1h, and supplementing water to obtain the machine-made sand regulator mother liquor. The machine-made sand regulator obtained by the preparation method is a graft copolymer with a special functional group and a mild crosslinking structure, can reduce the mixing amount of the water reducing agent, and has better slump retention and workability of the obtained concrete.
Because natural sand resources are deficient, machine-made sand gradually replaces natural sand to serve as fine aggregate of concrete to become a necessary trend, and therefore, a novel machine-made sand regulator is developed, the dispersing effect of concrete powder is improved, meanwhile, the novel machine-made sand regulator has good adaptability to machine-made sand with discontinuous composition or high mud content and powder content, and is vital to further improving the strength and the working performance of concrete.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a machine-made sand regulator, a preparation method and application thereof, wherein the machine-made sand regulator provided by the invention can improve the strength, the dispersibility and the working performance of concrete, is suitable for different machine-made sand materials, and particularly has excellent adaptability to machine-made sand with step matching and large mud and powder content. In addition, the machine-made sand regulator provided by the invention can improve the adaptability and the action effect of the concrete admixture.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a machine-made sand conditioner, wherein the raw materials of the machine-made sand conditioner comprise polyacrylamide, sodium tripolyphosphate, a gel reducing agent, polyethylene glycol and sodium metabisulfite.
The polyacrylamide has the functions of thickening, carrying sand and reducing the loss of the fracturing fluid, and also has the function of retarding, so that the transmission loss of pressure can be reduced. Meanwhile, the dispersion of cement particles in water can be improved through the interaction of the polyacrylamide, the sodium tripolyphosphate and the glue reducing agent, so that the water quantity required by cement mixing is reduced, and the strength of the prepared concrete is improved. The polyethylene glycol and the sodium metabisulfite have small space sizes and are easy to be preferentially adsorbed by soil to enter layers and the surfaces of soil particles, so that the adsorption of the soil to the concrete admixture is hindered, the consumption of the concrete admixture is reduced, and the adaptability and the dispersibility of the concrete admixture are improved. Therefore, the machine-made sand provided by the invention simultaneously introduces polyacrylamide, sodium tripolyphosphate, the gel reducing agent, polyethylene glycol and sodium metabisulfite, and the adaptability of the machine-made sand regulator to different machine-made sand materials, particularly to the machine-made sand with a graded composition and a large mud and powder content, is improved under the interaction of the components.
In addition, the polyacrylamide in the present invention is cationic, and the molecular weight is preferably 1200; the gel reducing agent is preferably a type 6.5 gel reducing agent (publication number: CN110407501A) of Changqing in the base industry, and the gel reducing agent has more excellent dispersibility; the molecular weight of the polyethylene glycol is preferably 2000 (polyethylene glycol 2000).
The machine-made sand regulator provided by the invention can improve the strength, the dispersibility and the working performance of concrete, is suitable for different machine-made sand materials, and particularly has excellent adaptability to machine-made sand with step matching and large mud and powder content. In addition, the machine-made sand regulator provided by the invention can improve the adaptability and the action effect of the concrete admixture.
In a preferred embodiment of the present invention, the polyacrylamide in the machine-made sand conditioner is 0.1 to 0.3 parts by weight, for example, 0.1 part, 0.12 part, 0.14 part, 0.16 part, 0.18 part, 0.2 part, 0.22 part, 0.24 part, 0.26 part, 0.28 part or 0.3 part, but not limited to the listed values, and other values not listed in the range of the values are also applicable; preferably 0.15 to 0.25 parts.
The invention limits the weight part of polyacrylamide to be 0.1-0.3 part, and when the content of polyacrylamide is lower than 0.1 part, the slurry wrapping performance of concrete is reduced, because when the dosage of polyacrylamide is insufficient, the water-retaining thickening capability of sodium polyacrylate to the concrete is insufficient; when the content of the polyacrylamide is higher than 0.3 part, the working performance of the concrete is reduced, for example, the slump is reduced, the loss is increased with time, and the like, because when the dosage of the polyacrylamide is too large, the thickening effect of the polyacrylamide is greatly improved, more additives can be adsorbed, and the water requirement of the concrete is also increased.
In a preferred embodiment of the present invention, the weight part of the sodium tripolyphosphate in the machine-made sand regulator is 0.8-1.2 parts, for example, 0.8 part, 0.85 part, 0.9 part, 0.95 part, 1 part, 1.05 part, 1.1 part, 1.15 part or 1.2 parts, but not limited to the listed values, and other values not listed in the range of the values are also applicable; preferably 0.9 to 1.1 parts.
The invention limits the weight part of the sodium tripolyphosphate to be 0.8-1.2 parts, when the content of the sodium tripolyphosphate is lower than 0.8 part, the slurry-forming effect, namely the slurry-expanding effect, of the regulator used for concrete is poor, because the dispersing ability provided when the dosage of the sodium tripolyphosphate is insufficient; when the content of the sodium tripolyphosphate is higher than 1.2 parts, the sodium tripolyphosphate has too strong retarding effect on the concrete, so that the setting time of the concrete is abnormal.
In a preferred embodiment of the present invention, the weight part of the degelling agent in the machine-made sand conditioner is 4.0 to 6.0 parts, for example, 4.0 parts, 4.2 parts, 4.4 parts, 4.6 parts, 4.8 parts, 5.0 parts, 5.2 parts, 5.4 parts, 5.6 parts, 5.8 parts, or 6.0 parts, but is not limited to the listed values, and other values not listed in the range of values are also applicable; preferably 4.5 to 6.0 parts.
The weight part of the gel reducing agent is limited to be 4.0-6.0 parts, and when the content of the gel reducing agent is lower than 4.0 parts, the working performance of concrete is deteriorated and the strength of the concrete is insufficient, because the gel reducing agent has a good dispersing effect, and the increase of the early strength and the increase of the later strength of the concrete are facilitated; when the content of the gel reducing agent is higher than 6.0 parts, the working performance of the concrete cannot be further improved.
In a preferred embodiment of the present invention, the weight part of the polyethylene glycol in the machine-made sand conditioner is 0.3 to 0.5, for example, 0.3, 0.32, 0.34, 0.36, 0.38, 0.4, 0.42, 0.44, 0.46, 0.48, or 0.5, but not limited to the recited values, and other values in the range of the recited values are also applicable; preferably 0.35 to 0.45 part.
The invention limits the weight part of the polyethylene glycol to be 0.3-0.5 part, and when the content of the polyethylene glycol is lower than 0.3 part, the mud resistance effect of the machine-made sand regulator is deteriorated, so that the effect of the machine-made sand regulator is influenced, because the unique chemical structure of the polyethylene glycol can reduce the adsorption of mud powder in the machine-made sand to an additive; when the content of the polyethylene glycol is more than 0.5 part, there is a possibility that the strength of the concrete is deteriorated, because excessive polyethylene glycol affects the strength of the concrete.
Preferably, the sodium metabisulfite in the machine-made sand conditioner is 1.0-3.0 parts by weight, and may be, for example, 1.0 part, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts, 2.0 parts, 2.2 parts, 2.4 parts, 2.6 parts, 2.8 parts, or 3.0 parts, but is not limited to the recited values, and other values not recited within the range of values are equally applicable; preferably 1.5 to 2.5 parts.
The invention firstly limits the weight part of sodium metabisulfite to 1.0-3.0 parts, when the content of the sodium metabisulfite is lower than 1.0 part, the mud resistance effect of the machine-made sand regulator is deteriorated, so that the effect of the machine-made sand regulator is influenced and the concrete loss is increased with time, because the sodium metabisulfite has the function of adsorption resistance and is beneficial to the increase of the concrete strength; when the content of sodium metabisulfite is higher than 3.0 parts, the later strength of the concrete is hindered from increasing, because the later strength of the concrete is influenced by the early strength effect of excessive sodium metabisulfite applied to the concrete.
As a preferable technical scheme of the invention, the machine-made sand regulator also comprises triterpenoid saponin.
Preferably, the triterpene saponin is present in the machine-made sand conditioner in an amount of 0.15 to 0.2 parts by weight, for example, 0.15 parts, 0.16 parts, 0.17 parts, 0.18 parts, 0.19 parts or 0.2 parts by weight, but not limited to the above-mentioned values, and other values not listed in the above-mentioned range are also applicable.
Preferably, the machine-made sand regulator further comprises a polyether air entraining agent.
Preferably, the polyether air entraining agent in the machine-made sand conditioner is 0.1 to 0.2 part by weight, and may be, for example, 0.1 part, 0.11 part, 0.12 part, 0.13 part, 0.14 part, 0.15 part, 0.16 part, 0.17 part, 0.18 part, 0.19 part, or 0.2 part, but is not limited to the enumerated values, and other unrecited values within the numerical range are also applicable.
The mechanism sand regulator provided by the invention also introduces the triterpenoid saponin and the polyether air entraining agent, can bring air entraining and slurry softening effects to the concrete, is favorable for improving the water retention property, the cohesiveness and the wrapping property of the concrete, and further improves the working performance of the concrete.
As a preferable technical scheme of the invention, the machine-made sand regulator also comprises acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer.
Preferably, the weight part of the acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer in the machine-made sand conditioner is 0.5 to 1.0 part, and may be, for example, 0.5 part, 0.55 part, 0.6 part, 0.65 part, 0.7 part, 0.75 part, 0.8 part, 0.85 part, 0.9 part, 0.95 part, or 1.0 part, but is not limited to the enumerated values, and other unrecited values within the numerical range are also applicable.
Preferably, the machine-made sand conditioner further comprises an antifoaming agent.
Preferably, the defoaming agent in the machine-made sand conditioner is 0.01 to 0.02 parts by weight, and may be, for example, 0.01 part, 0.011 part, 0.012 part, 0.013 part, 0.014 part, 0.015 part, 0.016 part, 0.017 part, 0.018 part, 0.019 part or 0.02 part by weight, but is not limited to the enumerated values, and other unrecited values within the range of values are also applicable.
Preferably, the defoamer comprises a silicone defoamer.
In a second aspect, the present invention provides a preparation method of the machine-made sand conditioner of the first aspect, the preparation method including:
and mixing and dissolving polyacrylamide, sodium tripolyphosphate, a gel reducing agent, polyethylene glycol and sodium metabisulfite in a solvent to obtain the machine-made sand regulator.
The preparation method of the anti-mud concrete gel reducer provided by the invention is simple in process, the raw materials are mixed and dissolved at normal temperature and normal pressure to obtain the concrete gel reducer, the production cost is low, and the popularization and application are easy.
As a preferable technical solution of the present invention, the preparation method comprises:
adding the polyacrylamide into the solvent for dissolving, adding the sodium tripolyphosphate and the sodium metabisulfite into the solvent for dissolving to obtain a primary mixed solution, adding the acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, the gel reducing agent and the polyethylene glycol into the primary mixed solution for dissolving to obtain a secondary mixed solution, adding the defoaming agent into the secondary mixed solution for dissolving, and adding the triterpenoid saponin and the polyether air entraining agent into the secondary mixed solution for dissolving to obtain the machine-made sand regulator.
Preferably, the solvent comprises water.
Preferably, the dissolving process is carried out under stirring.
In a third aspect, the present invention provides a concrete comprising the machine-made sand conditioner of the first aspect.
Compared with the prior art, the invention has the beneficial effects that:
the machine-made sand regulator provided by the invention can improve the strength, the dispersibility and the working performance of concrete, is suitable for different machine-made sand materials, and particularly has excellent adaptability to machine-made sand with step matching and large mud and powder content. In addition, the machine-made sand regulator provided by the invention can improve the adaptability and the action effect of the concrete admixture.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Example 1
The embodiment provides a machine-made sand regulator, and the raw materials of the machine-made sand regulator comprise: 0.2 part of polyacrylamide, 1.0 part of sodium tripolyphosphate, 6.0 parts of a gel reducing agent (Yuehong 6.5 type), 0.4 part of polyethylene glycol 2000(25322-68-3), 1.5 parts of sodium metabisulfite, 0.15 part of triterpenoid saponin, 0.1 part of polyether air entraining agent, 0.8 part of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer (40623-75-4), 0.01 part of organosilicon antifoaming agent and 89.84 parts of water.
The embodiment also provides a preparation method of the machine-made sand regulator, and the preparation method comprises the following steps:
adding 0.2 part of polyacrylamide into 89.84 parts of water for dissolving, adding 1.0 part of sodium tripolyphosphate and 1.5 parts of sodium metabisulfite for dissolving to obtain a primary mixed solution, adding 0.8 part of AA/AMPS (40623-75-4), 6.0 parts of a gel reducing agent and 0.4 part of polyethylene glycol 2000(25322-68-3) into the primary mixed solution for dissolving to obtain a secondary mixed solution, adding 0.01 part of an organic silicon defoaming agent into the secondary mixed solution for dissolving, and adding 0.15 part of triterpenoid saponin and 0.1 part of a polyether air entraining agent for dissolving to obtain the machine-made sand regulator.
Example 2
The embodiment provides a machine-made sand regulator, and the raw materials of the machine-made sand regulator comprise: 0.15 part of polyacrylamide, 1.1 part of sodium tripolyphosphate, 4.5 parts of a gel reducing agent (Yuehong 6.5 type), 0.35 part of polyethylene glycol 2000(25322-68-3), 2.5 parts of sodium metabisulfite, 0.18 part of triterpenoid saponin, 0.15 part of polyether air entraining agent, 0.6 part of AA/AMPS (40623-75-4), 0.01 part of silicone defoaming agent and 90.46 parts of water.
The embodiment also provides a preparation method of the machine-made sand regulator, and the preparation method comprises the following steps:
adding 0.15 part of polyacrylamide into 90.46 parts of water for dissolving, adding 1.1 part of sodium tripolyphosphate and 2.5 parts of sodium metabisulfite for dissolving to obtain a primary mixed solution, adding 0.6 part of AA/AMPS (40623-75-4), 4.5 parts of a gel reducing agent and 0.35 part of polyethylene glycol 2000(25322-68-3) into the primary mixed solution for dissolving to obtain a secondary mixed solution, adding 0.01 part of an organic silicon defoaming agent into the secondary mixed solution for dissolving, and adding 0.18 part of triterpenoid saponin and 0.15 part of a polyether air entraining agent for dissolving to obtain the machine-made sand regulator.
Example 3
The embodiment provides a machine-made sand regulator, and the raw materials of the machine-made sand regulator comprise: 0.25 part of polyacrylamide, 0.9 part of sodium tripolyphosphate, 5.0 parts of a gel reducing agent (Yuehong 6.5 type), 0.45 part of polyethylene glycol 2000(25322-68-3), 1.5 parts of sodium metabisulfite, 0.2 part of triterpenoid saponin, 0.1 part of polyether air entraining agent, 0.5 part of AA/AMPS (40623-75-4), 0.02 part of silicone defoaming agent and 91.08 part of water.
The embodiment also provides a preparation method of the machine-made sand regulator, and the preparation method comprises the following steps:
adding 0.25 part of polyacrylamide into 91.08 parts of water for dissolving, adding 0.9 part of sodium tripolyphosphate and 1.5 parts of sodium metabisulfite for dissolving to obtain a primary mixed solution, adding 0.5 part of AA/AMPS (40623-75-4), 5.0 parts of a gel reducing agent and 0.45 part of polyethylene glycol 2000(25322-68-3) into the primary mixed solution for dissolving to obtain a secondary mixed solution, adding 0.02 part of an organic silicon defoaming agent into the secondary mixed solution for dissolving, and adding 0.2 part of triterpenoid saponin and 0.1 part of a polyether air entraining agent for dissolving to obtain the machine-made sand regulator.
Example 4
The embodiment provides a machine-made sand regulator, and the raw materials of the machine-made sand regulator comprise: 0.1 part of polyacrylamide, 1.2 parts of sodium tripolyphosphate, 4.0 parts of a gel reducing agent (Yuehong 6.5 type), 0.3 part of polyethylene glycol 2000(25322-68-3), 3.0 parts of sodium metabisulfite, 0.18 part of triterpenoid saponin, 0.2 part of polyether air entraining agent, 1.0 part of AA/AMPS (40623-75-4), 0.01 part of organic silicon defoaming agent and 90.01 parts of water.
The embodiment also provides a preparation method of the machine-made sand regulator, and the preparation method comprises the following steps:
adding 0.1 part of polyacrylamide into 90.01 parts of water for dissolving, adding 1.2 parts of sodium tripolyphosphate and 3.0 parts of sodium metabisulfite for dissolving to obtain a primary mixed solution, adding 1.0 part of AA/AMPS (40623-75-4), 4.0 parts of a gel reducing agent and 0.3 part of polyethylene glycol 2000(25322-68-3) into the primary mixed solution for dissolving to obtain a secondary mixed solution, adding 0.01 part of an organic silicon defoaming agent into the secondary mixed solution for dissolving, and adding 0.18 part of triterpenoid saponin and 0.2 part of a polyether air entraining agent for dissolving to obtain the machine-made sand regulator.
Example 5
The embodiment provides a machine-made sand regulator, and the raw materials of the machine-made sand regulator comprise: 0.3 part of polyacrylamide, 0.8 part of sodium tripolyphosphate, 6.0 parts of a gel reducing agent (Yuehong 6.5 type), 0.5 part of polyethylene glycol 2000(25322-68-3), 1.0 part of sodium metabisulfite, 0.18 part of triterpenoid saponin, 0.1 part of polyether air entraining agent, 0.8 part of AA/AMPS (40623-75-4), 0.01 part of silicone defoaming agent and 90.31 parts of water.
The embodiment also provides a preparation method of the machine-made sand regulator, which comprises the following steps:
adding 0.3 part of polyacrylamide into 90.31 parts of water for dissolving, adding 0.8 part of sodium tripolyphosphate and 6.0 parts of sodium metabisulfite for dissolving to obtain a primary mixed solution, adding 0.8 part of AA/AMPS (40623-75-4), 6.0 parts of a gel reducing agent and 0.5 part of polyethylene glycol 2000(25322-68-3) into the primary mixed solution for dissolving to obtain a secondary mixed solution, adding 0.01 part of an organic silicon defoaming agent into the secondary mixed solution for dissolving, and adding 0.18 part of triterpenoid saponin and 0.1 part of a polyether air entraining agent for dissolving to obtain the machine-made sand regulator.
Example 6
The difference between the embodiment and the embodiment 1 is that the polyacrylamide in the raw material of the machine-made sand regulator is 0.05 part, and the rest process parameters and operation steps are the same as those in the embodiment 1.
Example 7
The difference between the embodiment and the embodiment 1 is that the polyacrylamide in the raw material of the machine-made sand regulator is 0.4 part, and the rest process parameters and operation steps are the same as those in the embodiment 1.
Example 8
The difference between the embodiment and the embodiment 1 is that the sodium tripolyphosphate in the raw material of the machine-made sand regulator is 0.5 part, and the rest technological parameters and the operation steps are the same as those in the embodiment 1.
Example 9
The difference between the embodiment and the embodiment 1 is that the sodium tripolyphosphate in the raw material of the machine-made sand regulator is 1.5 parts, and the rest technological parameters and the operation steps are the same as those in the embodiment 1.
Example 10
The difference between the embodiment and the embodiment 1 is that the amount of the degelling agent (type 6.5 of the capital industry Changqing) in the raw materials of the machine-made sand regulator is 2.0 parts, and the rest of the process parameters and the operation steps are the same as those in the embodiment 1.
Example 11
The difference between the embodiment and the embodiment 1 is that the amount of the degelling agent (type 6.5 of the capital industry Changqing) in the raw materials of the machine-made sand regulator is 8.0 parts, and the rest of the process parameters and the operation steps are the same as those in the embodiment 1.
Example 12
The difference between the embodiment and the embodiment 1 is that the raw material of the machine-made sand regulator comprises 0.1 part of polyethylene glycol, and the rest of the process parameters and the operation steps are the same as those of the embodiment 1.
Example 13
The difference between the embodiment and the embodiment 1 is that the raw material of the machine-made sand regulator comprises 0.8 part of polyethylene glycol, and the rest of the process parameters and the operation steps are the same as those of the embodiment 1.
Example 14
The difference between the embodiment and the embodiment 1 is that the sodium metabisulfite in the raw material of the machine-made sand regulator is 0.5 part, and the rest technological parameters and the operation steps are the same as the embodiment 1.
Example 15
The difference between the embodiment and the embodiment 1 is that the sodium metabisulfite in the raw material of the machine-made sand regulator is 4 parts, and the rest process parameters and the operation steps are the same as the embodiment 1.
Comparative example 1
The difference between the comparative example and the example 1 is that the raw materials of the machine-made sand regulator are not changed in parts except for the polyacrylamide, and the rest of the process parameters and the operation steps are the same as those of the example 1.
Comparative example 2
The difference between the comparative example and the example 1 is that the raw materials of the machine-made sand regulator are not changed in parts except for sodium tripolyphosphate, and the rest of the process parameters and the operation steps are the same as those in the example 1.
Comparative example 3
The difference between the comparative example and the example 1 is that the raw materials of the machine-made sand regulator are unchanged in parts except that a glue reducing agent (6.5 type Changqing in the base industry) is omitted, and the other process parameters and the operation steps are the same as those of the example 1.
Comparative example 4
The difference between the comparative example and the example 1 is that the raw materials of the machine-made sand regulator are not polyethylene glycol, the parts of the other components are unchanged, and the other process parameters and the operation steps are the same as those of the example 1.
Comparative example 5
The difference between the comparative example and the example 1 is that the raw materials of the machine-made sand regulator are unchanged in parts except for the omission of sodium metabisulfite, and the other process parameters and the operation steps are the same as those of the example 1.
The results of the performance test of the machine-made sand control agents prepared in examples 1 to 15 and comparative examples 1 to 5 after being incorporated in machine-made sand concrete (model of machine-made sand concrete: C30; incorporated amount of machine-made sand control agent 5 wt%) are shown in Table 1.
TABLE 1
The machine-made sand regulator prepared in example 1 was incorporated into machine-made sand concrete materials of different formulations:
(1) formula 1: 220kg/m cement 3 80kg/m of mineral powder 3 60kg/m of fly ash 3 Stone 1000kg/m 3 Machine-made sand 850kg/m 3 8kg/m of admixture 3 Machine-made sand regulator 6kg/m 3 170kg/m of water 3 ；
(2) And (2) formula: 220kg/m cement 3 80kg/m of mineral powder 3 60kg/m of fly ash 3 Stone 950kg/m 3 900kg/m of machine-made sand 3 8kg/m of admixture 3 Machine-made sand regulator 5kg/m 3 170kg/m of water 3 ；
(3) And (3) formula: 220kg/m cement 3 80kg/m of mineral powder 3 60kg/m of fly ash 3 Stone 900kg/m 3 Machine-made sand 950kg/m 3 8kg/m of admixture 3 Machine-made sand regulator 4kg/m 3 170kg/m of water 3 ；
The performance test results of the machine-made sand conditioner prepared in example 1 after being mixed into machine-made sand concrete materials with different formulas are shown in table 2.
TABLE 2
From the data of table 1, one can see:
(1) the machine-made sand regulator in the embodiments 1 to 5 effectively improves the strength, the dispersibility and the working performance of the concrete, so that the machine-made sand regulator provided by the invention can effectively solve the problem of poor working performance of the concrete when the machine-made sand is used as a raw material.
(2) The working performance improvement effects of the machine-made sand conditioner on the dispersibility, the strength and the like of the concrete in the examples 6 and 7 are lower than those in the example 1, because the addition amount of the polyacrylamide in the example 6 is too low, and the addition amount of the polyacrylamide in the example 7 is too high. When the addition amount of the polyacrylamide is too low, the water retention thickening capability of the sodium polyacrylate on the concrete is not enough, so that the slurry wrapping performance of the concrete is reduced; when the addition of polyacrylamide is too high, the polyacrylamide thickening effect can promote very greatly, can adsorb more additives, leads to concrete working property to descend, for example slump diminishes, loss grow scheduling problem over time, and the concrete water demand also can increase simultaneously.
(3) The working performance improvement effects of the machine-made sand conditioner on the dispersibility, strength and the like of the concrete in example 8 and example 9 are lower than those in example 1, because the addition amount of sodium tripolyphosphate in example 8 is too low, and the addition amount of sodium tripolyphosphate in example 9 is too much. When the addition amount of the sodium tripolyphosphate is too low, the provided dispersing ability is not enough, so that the slurry-raising effect, namely the slurry expansion effect, of the regulator used for concrete is poor; when the addition amount of the sodium tripolyphosphate is too high, the sodium tripolyphosphate has too strong retarding effect on the concrete, so that the setting time of the concrete is abnormal.
(4) The improvement effect of the machine-made sand conditioner on the working performance such as the dispersibility and the strength of the concrete in the example 10 is lower than that in the example 1, while the improvement effect of the machine-made sand conditioner on the working performance such as the dispersibility and the strength of the concrete in the example 11 is not much different from that in the example 1, because the addition amount of the gel reducing agent in the example 10 is too low, and the addition amount of the gel reducing agent in the example 11 is too much. The gel reducing agent has good dispersion effect, is beneficial to the increase of the early strength and the increase of the later strength of concrete, and causes the deterioration of the working performance of the concrete and the insufficient strength of the concrete when the adding amount of the gel reducing agent is too low; when the addition amount of the gel reducing agent is too high, the performance of the machine-made sand regulator is not greatly influenced, but the working performance of the concrete is not further improved.
(5) The working performance such as dispersibility and strength of the machine-made sand conditioner in examples 12 and 13 was less improved than that in example 1 because the addition amount of polyethylene glycol was too low in example 12 and too much in example 13. Due to the unique chemical structure of the polyethylene glycol, the adsorption of mud powder in the machine-made sand to the additive can be reduced, and when the addition amount of the polyethylene glycol is too low, the mud resisting effect of the machine-made sand regulator is deteriorated, so that the effect of the machine-made sand regulator is influenced; when the addition amount of the polyethylene glycol is too high, the phenomenon that the strength of concrete is damaged can be caused.
(6) The working performance improvement effects of the machine-made sand control agent on the dispersibility and strength of concrete in examples 14 and 15 were lower than those in example 1, because the amount of sodium metabisulfite added in example 14 was too low and the amount of sodium metabisulfite added in example 15 was too high. When the addition amount of sodium metabisulfite is too low, the mud resistance effect of the machine-made sand regulator is changed, so that the effect of the machine-made sand regulator is influenced, and the concrete loss is increased with time; when the addition of sodium metabisulfite is too high, too much sodium metabisulfite can have early strength effect when being used for concrete, thereby influencing the later strength increase of the concrete to be hindered.
(7) The improvement effect of the machine-made sand regulator in the comparative examples 1 to 5 on the working performances such as the dispersibility, the strength and the like of the concrete is lower than that of the working performance in the example 1, because the polyacrylamide is omitted in the comparative example 1, the sodium tripolyphosphate is omitted in the comparative example 2, the glue reducing agent is omitted in the comparative example 3, the polyethylene glycol is omitted in the comparative example 4, and the sodium metabisulfite is omitted in the comparative example 5, so that the machine-made sand regulator provided by the invention can obviously improve the working performances such as the strength, the flowability, the dispersibility, the wrapping property and the like of the machine-made sand concrete by simultaneously introducing the components such as the polyacrylamide, the sodium tripolyphosphate, the glue reducing agent, the polyethylene glycol and the sodium metabisulfite.
As can be seen from the data in table 2:
the machine-made sand regulator prepared in the embodiment 1 is doped into machine-made sand concrete materials with different formulas, namely, the machine-made sand regulator can still play a stable effect under the condition of different mud and powder contents of concrete machine-made sand, and the strength, the dispersibility and the working performance of concrete are improved. Therefore, the machine-made sand regulator provided by the invention is suitable for different machine-made sand materials, and has excellent adaptability to machine-made sand with discontinuous matching and large mud and powder content.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. The machine-made sand regulator is characterized in that raw materials of the machine-made sand regulator comprise 0.1-0.3 part by weight of polyacrylamide, 0.8-1.2 parts by weight of sodium tripolyphosphate, 4.0-6.0 parts by weight of a gel reducing agent, 0.3-0.5 part by weight of polyethylene glycol, 1.0-3.0 parts by weight of sodium metabisulfite, 0.15-0.2 part by weight of triterpenoid saponin, 0.1-0.2 part by weight of a polyether air entraining agent, 0.5-1.0 part by weight of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer and 0.01-0.02 part by weight of a defoaming agent.
2. The machine-made sand conditioner according to claim 1, wherein the weight part of polyacrylamide in the machine-made sand conditioner is 0.15 to 0.25.
3. The machine-made sand conditioner according to claim 1, wherein the weight part of the sodium tripolyphosphate in the machine-made sand conditioner is 0.9-1.1 parts.
4. The machine-made sand conditioner according to claim 1, wherein the weight part of the size reducing agent in the machine-made sand conditioner is 4.5-6.0 parts.
5. The machine-made sand conditioner according to claim 1, wherein the weight part of the polyethylene glycol in the machine-made sand conditioner is 0.35 to 0.45 part.
6. The machine-made sand conditioner according to claim 1, wherein the weight part of sodium metabisulfite in the machine-made sand conditioner is 1.5-2.5 parts.
7. The machine-made sand conditioner of claim 1, wherein the defoamer comprises a silicone defoamer.
8. A method of preparing the machine-made sand conditioner of any one of claims 1 to 7, wherein the method of preparing comprises:
mixing and dissolving polyacrylamide, sodium tripolyphosphate, a gel reducing agent, polyethylene glycol, sodium metabisulfite, triterpenoid saponin, a polyether air entraining agent, an acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer and a defoaming agent in a solvent to obtain the machine-made sand regulator.
9. The method of manufacturing according to claim 8, comprising:
adding the polyacrylamide into the solvent for dissolving, adding the sodium tripolyphosphate and the sodium metabisulfite into the solvent for dissolving to obtain a primary mixed solution, adding the acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, the gel reducing agent and the polyethylene glycol into the primary mixed solution for dissolving to obtain a secondary mixed solution, adding the defoaming agent into the secondary mixed solution for dissolving, and adding the triterpenoid saponin and the polyether air entraining agent into the secondary mixed solution for dissolving to obtain the machine-made sand regulator.
10. The method of claim 9, wherein the solvent comprises water.
11. The method according to claim 9, wherein the dissolving is performed under stirring.
12. A concrete comprising the machine-made sand conditioner of any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111589077.3A CN114230230B (en) | 2021-12-23 | 2021-12-23 | Machine-made sand regulator and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111589077.3A CN114230230B (en) | 2021-12-23 | 2021-12-23 | Machine-made sand regulator and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114230230A CN114230230A (en) | 2022-03-25 |
| CN114230230B true CN114230230B (en) | 2022-08-02 |
Family
ID=80762012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111589077.3A Active CN114230230B (en) | 2021-12-23 | 2021-12-23 | Machine-made sand regulator and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114230230B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115892620B (en) * | 2023-01-06 | 2023-05-05 | 德州润德混凝土有限公司 | Preparation method and equipment of machine-made sand concrete regulator |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61141783A (en) * | 1984-12-14 | 1986-06-28 | Taiho Kensetsu Kk | Soil conditioner and injection of same |
| CN104649608A (en) * | 2014-10-11 | 2015-05-27 | 江苏苏博特新材料股份有限公司 | Additive for improving early strength of cement based material as well as preparation method and application of additive |
| KR101524435B1 (en) * | 2014-07-19 | 2015-06-05 | 주식회사 정선골재 | A soil conditioner for a rice paddy or field using fine soil particle from natural earth and sand-based in stone cutting complex |
| CN105964875A (en) * | 2016-03-10 | 2016-09-28 | 繁昌县琪鑫铸造有限公司 | High-cohesiveness wet type molding sand used for cast flanges and a preparing method thereof |
| CN110357487A (en) * | 2019-08-08 | 2019-10-22 | 湖南加美乐素新材料股份有限公司 | A kind of Machine-made Sand regulator and its containing the purposes in machine-made sand concrete |
| CN110655619A (en) * | 2019-11-15 | 2020-01-07 | 信丰华轩建材有限公司 | Preparation method of machine-made sand regulator |
| CN110655346A (en) * | 2019-09-29 | 2020-01-07 | 湖南中岩建材科技有限公司 | Machine-made sand regulator and preparation method thereof |
-
2021
- 2021-12-23 CN CN202111589077.3A patent/CN114230230B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61141783A (en) * | 1984-12-14 | 1986-06-28 | Taiho Kensetsu Kk | Soil conditioner and injection of same |
| KR101524435B1 (en) * | 2014-07-19 | 2015-06-05 | 주식회사 정선골재 | A soil conditioner for a rice paddy or field using fine soil particle from natural earth and sand-based in stone cutting complex |
| CN104649608A (en) * | 2014-10-11 | 2015-05-27 | 江苏苏博特新材料股份有限公司 | Additive for improving early strength of cement based material as well as preparation method and application of additive |
| CN105964875A (en) * | 2016-03-10 | 2016-09-28 | 繁昌县琪鑫铸造有限公司 | High-cohesiveness wet type molding sand used for cast flanges and a preparing method thereof |
| CN110357487A (en) * | 2019-08-08 | 2019-10-22 | 湖南加美乐素新材料股份有限公司 | A kind of Machine-made Sand regulator and its containing the purposes in machine-made sand concrete |
| CN110655346A (en) * | 2019-09-29 | 2020-01-07 | 湖南中岩建材科技有限公司 | Machine-made sand regulator and preparation method thereof |
| CN110655619A (en) * | 2019-11-15 | 2020-01-07 | 信丰华轩建材有限公司 | Preparation method of machine-made sand regulator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114230230A (en) | 2022-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109748535B (en) | Cement grinding aid and preparation method thereof | |
| CN110563361B (en) | Low-doping cement chromium-removing grinding aid and preparation method thereof | |
| CN111233364B (en) | Composite mineral admixture, preparation method thereof and artificial sand concrete material containing composite mineral admixture | |
| CN109336448B (en) | Liquid cement chromium-removing grinding aid and preparation method thereof | |
| CN110606722B (en) | Building wallboard and preparation method thereof | |
| CN110282901B (en) | Cement grinding aid and preparation method thereof | |
| CN106904867B (en) | Concrete synergist containing chitosan sodium sulfonate and preparation method thereof | |
| CN112456855A (en) | Liquid grinding aid for improving later strength of cement and preparation method thereof | |
| CN114230230B (en) | Machine-made sand regulator and preparation method and application thereof | |
| CN110698109A (en) | Special high-workability bleeding-resistant additive for nanoscale concrete | |
| CN114230227B (en) | Anti-mud concrete glue reducing agent and preparation method and application thereof | |
| CN108328959A (en) | A kind of three high mother liquor of polycarboxylic acids and its manufacturing method | |
| CN115259725A (en) | Lead-zinc tailing concrete composite admixture and preparation method thereof | |
| CN109704620B (en) | Concrete admixture suitable for cold and dry environment and preparation method and application thereof | |
| CN113698126B (en) | Efficient cement grinding aid and preparation method and application thereof | |
| CN109534700B (en) | Steel slag modifier and preparation method thereof | |
| CN112079603B (en) | Large-fluidity neutron radiation prevention concrete and preparation method thereof | |
| CN111072325B (en) | Easy-flowing type composite mineral admixture, preparation method thereof and mortar prepared by adopting admixture | |
| CN109455967B (en) | Grinding aid special for phosphogypsum cement and preparation method thereof | |
| CN111646729A (en) | Concrete glue reducing agent and preparation process thereof | |
| CN113443879B (en) | Lightweight aggregate concrete produced by utilizing recycled lightweight aggregate and production process thereof | |
| CN112661436B (en) | Machine-made sand concrete bleeding inhibitor and application method thereof | |
| CN111908822B (en) | Slump-retaining concrete synergist and preparation method thereof | |
| CN112624653A (en) | Early-strength cement grinding aid | |
| CN114315208B (en) | Concrete glue reducing agent and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Room 101, Building 7, No. 439 Xinxing Road, Taiping Town, Conghua District, Guangzhou City, Guangdong Province, 510980 Patentee after: Guangzhou Jiye Changqing New Materials Co.,Ltd. Address before: 510990 No. 2, shangdapu first economic cooperative, Gaopu village, Taiping Town, Conghua, Guangzhou, Guangdong Patentee before: GUANGZHOU JIYE CHANGQING NEW MATERIAL Co.,Ltd. |