CN115010387A - High-performance cement and preparation method thereof - Google Patents
High-performance cement and preparation method thereof Download PDFInfo
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- CN115010387A CN115010387A CN202210624393.8A CN202210624393A CN115010387A CN 115010387 A CN115010387 A CN 115010387A CN 202210624393 A CN202210624393 A CN 202210624393A CN 115010387 A CN115010387 A CN 115010387A
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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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
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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
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
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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
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F279/00—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00
- C08F279/02—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00 on to polymers of conjugated dienes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The invention discloses high-performance cement and a preparation method thereof, belonging to the technical field of cement, wherein the cement comprises a component A and a component B; the component A comprises the following raw materials in parts by weight: 50-60 parts of silicate cement clinker, 16-20 parts of dihydrate gypsum, 25-30 parts of modified coal gangue powder and nano ZrO 2 0.8-1 part; the component B is an auxiliary agent, and the addition amount of the auxiliary agent is 10-12% of the mass of the component A. The cement comprises a component A and a component B, wherein the component B is matched with the component A for use when the cement is prepared into slurry; the component B is selected fromThe prepared auxiliary agent is a high molecular polymer, and the molecular side chain contains a benzene ring, carboxyl directly connected with the benzene ring and an alcohol amine group; the carboxyl and the alcohol amine group play a mutual synergistic effect to play a grinding aid effect; in addition, the auxiliary agent molecules are adsorbed on the surface layer of the cement particles through the electrostatic action to form a polymer film, so that mesoporous pores are blocked and filled, and the effects of toughening finished cement and improving mechanical properties are achieved.
Description
Technical Field
The invention belongs to the technical field of cement, and particularly relates to high-performance cement and a preparation method thereof.
Background
The cement is a powdery hydraulic inorganic cementing material, and can become plastic slurry after being added with a proper amount of water, not only can be hardened in the air, but also can be hardened in the water, and can firmly cement materials such as sand, stone and the like together. As an important cementing material, the high-performance cement is widely applied to engineering such as civil construction, water conservancy, national defense and the like for a long time. The existing finished cement generally has the problems of low strength after solidification, easy cracking and increased maintenance cost, so that the improvement of the strength of the cement has important significance.
The common cement-based composite material (common concrete or cement mortar) is a heterogeneous and heterogeneous inorganic brittle material, and the porous material can be damaged rapidly under the erosion action of external aggressive media such as carbon dioxide, water, chloride ions, sulfate and the like, so that the service life is greatly shortened. With the development of industry, attempts have been made to add high molecular polymers having toughness and elastic viscosity to cement concrete and mortar. After the polymer material is added, many properties of the cement-based material, such as strength, deformability, adhesive property, waterproof property, durability and the like, can be improved.
In the prior art, after the high molecular polymer is added into cement paste, flocculation and flash coagulation are easy to occur or the viscosity is increased, so that the dispersity is reduced, and various performances of the cement are influenced. In addition, a large amount of energy consumption is needed in the production process of cement, and the grinding aid is doped as the best means for saving energy, reducing consumption and saving cost in a cement plant. At present, the cement grinding aid mainly uses alcohol amine substances such as triethanolamine, triisopropanolamine and the like as main raw materials, has a good use effect, can reduce the energy consumption by more than 20 percent under a reasonable mixing amount, and has a certain early strength effect on the produced cement. However, the alcohol amine grinding aid has poor performance stability, is very sensitive to parameter change, and has high price, so that the further application of the alcohol amine grinding aid is restricted.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides high-performance cement and a preparation method thereof.
The cement comprises a component A and a component B, wherein the component B is matched with the component A for use when the cement is prepared into slurry; the component B is a self-made auxiliary agent, is a high molecular polymer, contains benzene ring on the molecular side chain, and is directly connected with the benzene ringattached-COOH and alcohol amine groups; wherein, the-COOH and the alcohol amine group play a mutual synergistic effect to play a grinding aid effect; in addition, -COOH in the assistant molecule and Ca in the cement paste 2+ The polymer film has a complexing effect, positive charges and negative charges are mutually attracted and adsorbed on the surface layer of cement particles through an electrostatic effect to form a polymer film, and the polymer film blocks and fills mesoporous pores, so that the effects of toughening finished cement and improving mechanical properties are achieved.
The purpose of the invention can be realized by the following technical scheme:
a high-performance cement comprises a component A and a component B;
the component A comprises the following raw materials in parts by weight: 50-60 parts of silicate cement clinker, 16-20 parts of dihydrate gypsum, 25-30 parts of modified coal gangue powder and nano ZrO 2 0.8-1 part;
the component B is an auxiliary agent, and the addition amount of the auxiliary agent is 10-12% of the mass of the component A.
Further, the modified coal gangue powder is prepared by the following steps:
crushing coal gangue, drying in a drying oven to constant weight, grinding into powder with the particle size of less than 10 mu m, calcining in a high-temperature electric furnace at the temperature of 1000-1200 ℃ for 150min, taking out, cooling to room temperature, and then placing in an environment at the temperature of-30 ℃ and an environment at the temperature of 30 ℃ for 3h respectively, wherein the cycle times are 8-10 times, so as to obtain the modified coal gangue powder.
The coal gangue is an ore, has certain excitability after calcination and cold-hot alternate treatment, can promote other components to rapidly form a stacking structure with cement powder particles in the cement, reduces the internal porosity of the cement, improves the compressive strength of cement mortar, and improves the mechanical property and the durability of the cement.
Further, the auxiliary agent is prepared by the following steps:
s1, adding 4-carboxycinnamic acid and acetone into a flask with a mechanical stirrer and a thermometer, stirring for dissolving, heating to 50 ℃, slowly dropwise adding triethanolamine, continuing to perform heat preservation reaction for 3 hours after dropwise adding is finished, cooling to room temperature, and performing reduced pressure distillation to remove acetone to obtain a functional monomer; the dosage ratio of the 4-carboxyl cinnamic acid, the acetone and the triethanolamine is 0.1mol:80-100mL:0.11 mol;
the carboxyl on the 4-carboxyl cinnamic acid and-OH on the triethanolamine are subjected to esterification reaction to prepare a functional monomer; although the 4-carboxyl cinnamic acid molecule contains two-COOH, the carboxyl directly connected with the benzene ring has steric hindrance, so that the reactivity of the other-COOH is higher, and the-COOH connected with the benzene ring does not participate in the reaction by controlling the micro-excess of triethanolamine and the reaction conditions, and the specific reaction process is as follows:
s2, respectively dissolving an initiator APS and an emulsifier SDS into deionized water to form an initiator solution with the mass fraction of 1% and an emulsifier solution with the mass fraction of 1.5% for later use;
s3, dissolving half of the functional monomer into half of the emulsifier solution, adding the solution into a four-neck flask, adding half of the styrene monomer and 1/3 of initiator solution, and reacting at the constant temperature of 70 ℃ for 1 hour to obtain seed emulsion;
s4, mixing the remaining half of styrene with polybutadiene (low molecular weight), adding the remaining half of emulsifier solution, stirring at a high speed of 1000r/min to uniformly disperse the emulsifier solution to obtain stable monomer micro-emulsion, uniformly mixing the monomer micro-emulsion with the remaining functional monomers, simultaneously dripping the monomer micro-emulsion and the remaining 2/3 initiator solution into a four-neck flask containing seed emulsion, keeping the constant temperature condition of 70 ℃ in the dripping process, and continuing to perform constant temperature reaction for 3 hours after the dripping is finished to obtain an assistant;
the mass ratio of the low molecular weight polybutadiene to the styrene to the functional monomer is 60:50:13, and the dosages of an initiator APS and an emulsifier SDS are respectively 1% and 2% of the total mass of the monomers (the total mass of the low molecular weight polybutadiene, the styrene and the functional monomer);
taking low molecular weight polybutadiene, styrene and functional monomers as polymerization monomers, and carrying out emulsion polymerization under the action of an initiator and an emulsifier to obtain a latex type auxiliary agent; the molecular structural formula of the assistant is as follows:
introducing a benzene ring, -COOH directly connected with the benzene ring and an alcohol amine group on a molecular side chain by the functional monomer participating in polymerization reaction; the-COOH groups are negative polarity groups and can be adsorbed to cement particles with positive charges in the cement grinding process, so that the surface electric field of the cement particles is eliminated, and the cement particles are prevented from being healed again; the alcohol amine group has better softening effect on cement particles, the-COOH and the alcohol amine group have synergistic effect, so that the active dispersion effect is achieved, powder can be sufficiently ground, the powder is prevented from being coarse, and the auxiliary agent has a grinding-assisting effect;
the auxiliary agent is a high molecular polymer, and forms a layer of film on the surface of cement particles through adsorption, so that the hydration process of cement can be delayed, and aggregation and agglomeration are prevented, thereby improving the sedimentation stability of cement slurry; furthermore, the benzene ring is directly connected with the carboxyl and is a rigid group, so that the benzene ring has a larger steric hindrance effect, and cement particles are more dispersed after the particles are attached to the surface layer of the cement, so that the dispersion performance of the cement paste is better;
auxiliary agent molecules are adsorbed to the surface layer of the silicate mineral phase with positive charges through electrostatic interaction, and-COOH in the molecules and Ca in cement paste 2+ The cement has a complexing effect, a polymer film is formed on the surface layer of cement particles, so that the effect of filling pores is achieved, the number of macropores of the finished cement is reduced by the filling effect, the pore diameter of the micropores is reduced, the phenomenon that the stress of a local area is larger than the average stress is avoided, and the toughness of the finished cement is improved; the auxiliary agent acts between cement molecules in the hydration process through adsorption and filling, and when the auxiliary agent is subjected to external impact force, the auxiliary agent can absorb a part of acting force, so that the external impact force is reduced, the brittleness of finished cement is reduced, and the toughness of the finished cement is improved.
A preparation method of high-performance cement comprises the following steps:
firstly, mixing portland cement clinker with dihydrate gypsum, grinding by using a ball mill, and sieving by using a 300-mesh sieve to obtain a cement matrix;
secondly, placing the cement matrix in a high-temperature electric furnace, calcining at 1300-1350 ℃ for 40-50min, cooling to 160-180 ℃, and reacting with nano ZrO 2 Mixing with modified coal gangue powder uniformly, and cooling to room temperature to obtain a component A;
and thirdly, when in use, the component B is matched with the component A according to the proportion for use.
Further, the specific operations used in combination are as follows: grinding the component A and the component B of 1/4, adding external water to prepare cement mortar, adding the rest component B of 3/4 into the cement mortar, uniformly mixing, and finally molding and maintaining.
The invention has the beneficial effects that:
the cement comprises a component A and a component B, wherein the component B is matched with the component A for use when the cement is prepared into slurry; the component B is a self-made auxiliary agent, is a high molecular polymer, and contains a benzene ring, -COOH directly connected with the benzene ring and an alcohol amine group on a molecular side chain; wherein, the-COOH and the alcohol amine group play a mutual synergistic effect to play a grinding aid effect; in addition, -COOH in the assistant molecule and Ca in the cement paste 2+ The polymer film has a complexing effect, positive charges and negative charges are mutually attracted and adsorbed on the surface layer of cement particles through an electrostatic effect to form a polymer film, and the polymer film blocks and fills mesoporous pores, so that the effects of toughening finished cement and improving mechanical properties are achieved.
Modified coal gangue powder is added into the component A, the coal gangue is an ore, and after calcination and cold-hot alternate treatment, the modified coal gangue powder has certain excitability, can promote other components to rapidly form a stacking structure with cement powder particles in cement, reduces the internal porosity of the cement, improves the compressive strength of cement mortar, and improves the mechanical property and the durability of the cement.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Preparing modified coal gangue powder:
crushing coal gangue, drying in a drying oven to constant weight, grinding into powder with particle size less than 10 μm, calcining in a high temperature electric furnace at 1000 deg.C for 100min, cooling to room temperature, and repeating for 8 times at-30 deg.C and 30 deg.C for 3 hr each to obtain modified coal gangue powder.
Example 2
Preparing modified coal gangue powder:
crushing coal gangue, drying in a drying oven to constant weight, grinding into powder with particle size less than 10 μm, calcining in a high temperature electric furnace at 1200 deg.C for 150min, cooling to room temperature, and repeating for 10 times at-30 deg.C and 30 deg.C for 3 hr each to obtain modified coal gangue powder.
Example 3
Preparing an auxiliary agent:
s1, adding 19.2g of 4-carboxycinnamic acid and 80mL of acetone into a flask with a mechanical stirrer and a thermometer, stirring for dissolving, heating to 50 ℃, slowly dropwise adding 16.39g of triethanolamine, continuing to perform heat preservation reaction for 3 hours after dropwise adding is finished, cooling to room temperature, and removing the acetone through reduced pressure distillation to obtain a functional monomer;
s2, respectively dissolving an initiator APS and an emulsifier SDS into deionized water to form an initiator solution with the mass fraction of 1% and an emulsifier solution with the mass fraction of 1.5% for later use;
s3, dissolving 6.5g of functional monomer in 82mL of emulsifier solution, adding the solution into a four-neck flask, adding 25g of styrene monomer and 41mL of initiator solution, and reacting at the constant temperature of 70 ℃ for 1h to obtain seed emulsion;
s4, mixing 25g of styrene and 60g of polybutadiene, adding 82mL of emulsifier solution, stirring at a high speed of 1000r/min to uniformly disperse the mixture to obtain stable monomer micro-emulsion, uniformly mixing the monomer micro-emulsion with 6.5g of functional monomer, simultaneously dripping the mixture and 82mL of initiator solution into a four-neck flask containing seed emulsion, keeping the constant temperature condition of 70 ℃ in the dripping process, and continuously carrying out constant temperature reaction for 3 hours after the dripping is finished to obtain the auxiliary agent.
Example 4
Preparing an auxiliary agent:
s1, adding 19.2g of 4-carboxycinnamic acid and 100mL of acetone into a flask with a mechanical stirrer and a thermometer, stirring for dissolving, heating to 50 ℃, slowly dropwise adding 16.39g of triethanolamine, continuing to perform heat preservation reaction for 3 hours after dropwise adding is finished, cooling to room temperature, and removing the acetone through reduced pressure distillation to obtain a functional monomer;
s2, respectively dissolving an initiator APS and an emulsifier SDS into deionized water to form an initiator solution with the mass fraction of 1% and an emulsifier solution with the mass fraction of 1.5% for later use;
s3, dissolving 6.5g of functional monomer in 82mL of emulsifier solution, adding the solution into a four-neck flask, adding 25g of styrene monomer and 41mL of initiator solution, and reacting at the constant temperature of 70 ℃ for 1h to obtain seed emulsion;
s4, mixing 25g of styrene and 60g of polybutadiene, adding 82mL of emulsifier solution, stirring at a high speed of 1000r/min to uniformly disperse the mixture to obtain stable monomer micro-emulsion, uniformly mixing the monomer micro-emulsion with 6.5g of functional monomer, then dripping the mixture and 82mL of initiator solution into a four-neck flask containing the seed emulsion, keeping the constant temperature condition of 70 ℃ in the dripping process, and continuing to perform constant temperature reaction for 3 hours after the dripping is finished to obtain the auxiliary agent.
Example 5
Preparing high-performance cement:
firstly, mixing 50g of portland cement clinker with 16g of dihydrate gypsum, grinding by using a ball mill, and sieving by using a 300-mesh sieve to obtain a cement matrix;
secondly, placing the cement matrix in a high-temperature electric furnace, calcining for 40min at 1300 ℃ and high temperature, cooling to 160 ℃, and then mixing with 0.8g of nano ZrO 2 And 25g of the modified coal gangue powder prepared in the embodiment 1 are uniformly mixed and cooled to room temperature to obtain a component A;
and thirdly, when in use, the component B (the auxiliary prepared in example 3) is matched with the component A according to the mass ratio of 10: 100.
Example 6
Preparing high-performance cement:
firstly, mixing 55g of portland cement clinker with 18g of dihydrate gypsum, grinding by using a ball mill, and sieving by using a 300-mesh sieve to obtain a cement matrix;
secondly, placing the cement matrix in a high-temperature electric furnace, calcining for 45min at 1330 ℃, cooling to 170 ℃, and mixing with 0.9g of nano ZrO 2 And 28g of the modified coal gangue powder prepared in the embodiment 2 are uniformly mixed and cooled to room temperature to obtain a component A;
and thirdly, when in use, the component B (the auxiliary prepared in example 4) is matched with the component A according to the mass ratio of 11: 100.
Example 7
Preparing high-performance cement:
firstly, mixing 60g of portland cement clinker with 20g of dihydrate gypsum, grinding by using a ball mill, and sieving by using a 300-mesh sieve to obtain a cement matrix;
secondly, placing the cement matrix in a high-temperature electric furnace, calcining at 1350 ℃ for 50min, cooling to 180 ℃, and mixing with 1g of nano ZrO 2 And 30g of the modified coal gangue powder prepared in the embodiment 1 are uniformly mixed and cooled to room temperature to obtain a component A;
and thirdly, when in use, the component B (the auxiliary prepared in example 3) is matched with the component A according to the mass ratio of 12: 100.
Comparative example 1
The A component in example 5 was used as cement without adding an auxiliary.
Comparative example 2
The modified coal gangue powder in the example 5 is changed into the common coal gangue powder, and the other raw materials and the preparation process are not changed.
The cements obtained in examples 5 to 7 and comparative examples 1 to 2 were subjected to the following performance tests:
grinding the component A and the component B (auxiliary agent) of 1/4 by using a SM phi 500mm multiplied by 500mm grinding machine according to the regulation of GB/T26748-2011, and keeping the grinding time to be 30min and the grinding time to be 5min in the grinding process to obtain a cement main body;
preparing cement mortar from a cement main body according to GBT 1346-;
according to the standard requirements of the mechanical property test method of ordinary concrete (GB 50081), firstly, respectively preparing cement mortar into test blocks with the sizes of 70.7mm multiplied by 70.7mm, putting the test blocks into a standard curing box for curing for 28d, carrying out compressive strength test, respectively preparing the cement mortar into test blocks with the sizes of 40mm multiplied by 160mm, putting the test blocks into the standard curing box for curing for 28d, and carrying out flexural strength test on the test sample;
the results obtained are shown in the following table:
as is clear from the above data, in examples 5 to 7, the difference in density between the upper and lower cement mortar layers was 0.04g cm -3 The addition of the auxiliary agent into the cement mortar can improve the sedimentation stability of the cement mortar, so that the upper and lower densities of the cured cement mortar are uniform, and various performances of a finished product are improved; the compressive strength of the cement finished products obtained in the examples 5 to 7 after curing is more than 52.5MPa and the flexural strength is more than 8.0MPa, which shows that the cement finished products prepared by the invention have higher mechanical properties; according to the data of the comparative example 1, the addition of the auxiliary agent can effectively improve the settling property of cement mortar and improve the mechanical strength of a finished product after cement curing; according to the data of the comparative example 2, the coal gangue powder can promote the improvement of the mechanical property of the cement to a certain extent after being modified.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (6)
1. The high-performance cement is characterized by comprising a component A and a component B;
the component A comprises the following raw materials in parts by weight: 50-60 parts of silicate cement clinker, 16-20 parts of dihydrate gypsum, 25-30 parts of modified coal gangue powder and nano ZrO 2 0.8-1 part;
the component B is an auxiliary agent, and the addition amount of the auxiliary agent is 10-12% of the mass of the component A.
2. The high-performance cement of claim 1, wherein the modified gangue powder is prepared by the following steps:
crushing coal gangue, drying the crushed coal gangue in a drying oven to constant weight, grinding the crushed coal gangue into powder with the particle size of less than 10 mu m, calcining the powder in a high-temperature electric furnace at the temperature of 1000-1200 ℃, calcining the powder for 150min, taking out the powder, cooling the powder to room temperature, and then placing the powder in an environment at the temperature of-30 ℃ and an environment at the temperature of 30 ℃ for 3h respectively with cycle times of 8-10 times to obtain modified coal gangue powder.
3. The high-performance cement as claimed in claim 1, wherein the auxiliary agent is prepared by the following steps:
s1, adding 4-carboxycinnamic acid and acetone into a flask with a mechanical stirrer and a thermometer, stirring for dissolving, heating to 50 ℃, slowly dropwise adding triethanolamine, continuing to perform heat preservation reaction for 3 hours after dropwise adding is finished, cooling to room temperature, and performing reduced pressure distillation to remove acetone to obtain a functional monomer;
s2, respectively dissolving an initiator APS and an emulsifier SDS into deionized water to form an initiator solution with the mass fraction of 1% and an emulsifier solution with the mass fraction of 1.5% for later use;
s3, dissolving half of the functional monomer into half of the emulsifier solution, adding the solution into a four-neck flask, adding half of the styrene monomer and 1/3 of initiator solution, and reacting at the constant temperature of 70 ℃ for 1 hour to obtain seed emulsion;
s4, mixing the remaining half of styrene with polybutadiene, adding the remaining half of emulsifier solution, stirring at a high speed of 1000r/min to uniformly disperse the mixture to obtain stable monomer micro-emulsion, uniformly mixing the monomer micro-emulsion with the remaining functional monomers, simultaneously dripping the mixture and the remaining 2/3 initiator solution into a four-neck flask containing seed emulsion, keeping the constant temperature condition of 70 ℃ in the dripping process, and continuously carrying out constant temperature reaction for 3 hours after the dripping is finished to obtain the assistant.
4. The high-performance cement as claimed in claim 3, wherein the ratio of the amounts of 4-carboxycinnamic acid, acetone and triethanolamine in step S1 is 0.1mol:80-100mL:0.11 mol.
5. The high-performance cement as claimed in claim 3, wherein the mass ratio of the low-molecular-weight polybutadiene to the styrene to the functional monomer is 60:50:13, and the amounts of the initiator APS and the emulsifier SDS are respectively 1% and 2% of the total mass of the monomers.
6. The method for preparing high-performance cement according to claim 1, characterized by comprising the following steps:
firstly, mixing portland cement clinker with dihydrate gypsum, grinding by using a ball mill, and sieving by using a 300-mesh sieve to obtain a cement matrix;
secondly, placing the cement matrix in a high-temperature electric furnace, calcining at 1300-1350 ℃ for 40-50min, cooling to 160-180 ℃, and reacting with nano ZrO 2 Mixing with modified coal gangue powder, and cooling to room temperature to obtain component A;
and thirdly, when in use, the component B is matched with the component A according to the proportion for use.
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| CN115403301A (en) * | 2022-10-11 | 2022-11-29 | 山东众森科技股份有限公司 | Additive for preparing high-performance concrete admixture from spontaneous combustion coal gangue and application |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112679117A (en) * | 2021-01-28 | 2021-04-20 | 青岛大明新型建材有限公司 | High-performance portland cement and preparation method thereof |
-
2022
- 2022-06-02 CN CN202210624393.8A patent/CN115010387B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112679117A (en) * | 2021-01-28 | 2021-04-20 | 青岛大明新型建材有限公司 | High-performance portland cement and preparation method thereof |
Non-Patent Citations (8)
| Title |
|---|
| 伍根伙等: "不同极性官能团助磨剂对水泥粉磨及水化性能影响研究", 《水泥》 * |
| 封江辉等: "高分散性丁苯胶乳的制备及其对水泥的改性" * |
| 方荣利等: "《水泥混合材》", 31 May 1993, 成都科技大学出版社 * |
| 朱孔赞等: "纳米改性水泥的研究进展" * |
| 朱孔赞等: "纳米改性水泥的研究进展", 《新世纪水泥导报》 * |
| 樊金杰等: "核壳型丁苯胶乳的制备及其对油井水泥石性能的影响", 《化工进展》 * |
| 洪一粟: "改性醇胺类高分子助磨剂的合成与性能研究" * |
| 洪一粟: "改性醇胺类高分子助磨剂的合成与性能研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115403301A (en) * | 2022-10-11 | 2022-11-29 | 山东众森科技股份有限公司 | Additive for preparing high-performance concrete admixture from spontaneous combustion coal gangue and application |
| CN115403301B (en) * | 2022-10-11 | 2023-10-24 | 山东众森科技股份有限公司 | Additive for preparing high-performance concrete admixture from coal gangue and application of additive |
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| CN115010387B (en) | 2023-07-14 |
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