CN111072298A - Cement and preparation method thereof - Google Patents
Cement and preparation method thereof Download PDFInfo
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- CN111072298A CN111072298A CN201911267756.1A CN201911267756A CN111072298A CN 111072298 A CN111072298 A CN 111072298A CN 201911267756 A CN201911267756 A CN 201911267756A CN 111072298 A CN111072298 A CN 111072298A
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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
- C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
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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
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
- C04B7/21—Mixtures thereof with other inorganic cementitious materials or other activators with calcium sulfate containing activators
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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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- 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
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- Ceramic Engineering (AREA)
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- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention relates to cement and a preparation method thereof, wherein the preparation raw materials comprise, by weight, 40-60 parts of clinker, 10-15 parts of modified VAE emulsion, 5-10 parts of limestone, 4-6 parts of fly ash, 2-5 parts of fluorgypsum, 6-10 parts of foaming agent, 3-7 parts of black stone, 20-30 parts of water granulated slag, 5-10 parts of mineral powder, 0.1-0.5 part of grinding aid, 1-3 parts of dispersing agent and 1-3 parts of stabilizing agent, wherein the foaming agent is α -sodium alkenyl sulfonate and sodium dodecyl sulfonate, and the modified VAE emulsion is added into a cement formula, so that the modified cement has the characteristics of high impact resistance, good waterproof performance, strong corrosion resistance and large elasticity, and the service life is greatly prolonged.
Description
Technical Field
The invention belongs to the technical field of cement, and particularly relates to cement and a preparation method thereof.
Background
The cement is an inorganic gel material which is added with water and stirred to form slurry, can be hardened in the air or in water better, and can firmly bond sand, stone and other materials together. For a long time, cement is used as an important cementing material and widely applied to engineering of civil construction, water conservancy, national defense and the like. With the increase of economy in China, the construction of infrastructure and the development of real estate are increased in China, the demand of cement is more and more large, the yield of cement in China is about 21 hundred million tons in 2011, and the yield is the first of all over the world.
The existing finished cement has low strength after solidification, and the cement needs additional ingredients to improve the strength when in use so as to meet specific construction requirements; the grinding and calcining time is long in the production process, the cement production cost is greatly improved, meanwhile, the environmental pollution is easily caused, and the national policy of energy conservation and emission reduction cannot be adapted.
In view of the above technical problems, improvements are needed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides cement and a preparation method thereof.
In order to achieve the purpose, the technical scheme includes that the cement comprises, by weight, 40-60 parts of clinker, 10-15 parts of modified VAE emulsion, 5-10 parts of limestone, 4-6 parts of fly ash, 2-5 parts of fluorgypsum, 6-10 parts of foaming agent, 3-7 parts of black stone, 20-30 parts of water granulated slag, 5-10 parts of mineral powder, 0.1-0.5 part of grinding aid, 1-3 parts of dispersing agent and 1-3 parts of stabilizing agent, wherein the foaming agent is α -sodium alkenyl sulfonate and sodium dodecyl sulfonate.
As a preferable mode of the invention, the cement comprises the following preparation raw materials in parts by weight: 40 parts of clinker, 10 parts of modified VAE emulsion, 5 parts of limestone, 4 parts of fly ash, 2 parts of fluorgypsum, 6 parts of foaming agent, 3 parts of black stone, 20 parts of granulated slag, 5 parts of mineral powder, 0.1 part of grinding aid, 1 part of dispersing agent and 1 part of stabilizing agent.
As a preferable mode of the invention, the cement comprises the following preparation raw materials in parts by weight: 60 parts of clinker, 15 parts of modified VAE emulsion, 10 parts of limestone, 6 parts of fly ash, 5 parts of fluorgypsum, 10 parts of foaming agent, 7 parts of black stone, 30 parts of granulated slag, 10 parts of mineral powder, 0.5 part of grinding aid, 3 parts of dispersing agent and 3 parts of stabilizing agent.
As a preferable mode of the invention, the cement comprises the following preparation raw materials in parts by weight: 52 parts of clinker aggregate, 12 parts of modified VAE emulsion, 6 parts of limestone, 5 parts of fly ash, 6 parts of fluorgypsum, 8 parts of foaming agent, 4 parts of black stone, 24 parts of granulated slag, 6 parts of mineral powder, 0.15 part of grinding aid, 2 parts of dispersing agent and 2 parts of stabilizing agent.
In a preferred mode of the invention, the modified VAE emulsion comprises the following materials in parts by weight: the adhesive comprises, by weight, 5-59 parts of VAE45, 5-7 parts of polyvinyl alcohol, 15-20 parts of vinyl acetate, 1-4 parts of ammonium persulfate and 1-3 parts of potassium persulfate.
In a preferred mode of the invention, the modified VAE emulsion comprises the following materials in parts by weight: 45 parts of VAE, 5 parts of polyvinyl alcohol, 15 parts of vinyl acetate, 1 part of ammonium persulfate and 1 part of potassium persulfate.
In a preferred mode of the invention, the modified VAE emulsion comprises the following materials in parts by weight: 59 parts of VAE, 7 parts of polyvinyl alcohol, 20 parts of vinyl acetate, 4 parts of ammonium persulfate and 3 parts of potassium persulfate.
In a preferred embodiment of the present invention, the dispersant is a sodium naphthalenesulfonate formaldehyde condensate
In a preferred embodiment of the present invention, the stabilizer is sodium carboxymethyl cellulose.
A method for preparing cement comprises the following steps:
step one, adding limestone, fly ash, fluorgypsum, black stone, water granulated slag and mineral powder into a high-speed mixer, stirring and mixing at the temperature of 110-;
pouring the weighed VAE, polyvinyl alcohol, vinyl acetate, ammonium persulfate and potassium persulfate into a reaction kettle together for mixing and heating, uniformly stirring, and preserving heat to prepare a modified VAE emulsion for later use;
step three, pouring the modified VAE emulsion obtained in the step two into a stirrer for heating and stirring, controlling the stirring speed at 15-20 r/min, then respectively adding the weighed foaming agent and the weighed dispersing agent into the stirrer for mixing with the modified VAE emulsion, heating and stirring, so that the mixture is in the form of powder particles with uniform size; obtaining a mixture B for later use;
pouring the weighed clinker into a stirrer to be mixed and dried together with the mixture A and the mixture B, and drying for 15-30 minutes to obtain a dry mixture C;
and (V) adding the dry mixture C obtained in the step (IV) into a cement mill, conveying the mixed material from a grinding head of the cement mill into a finished product homogenizing bin by using a lifting machine, and homogenizing by using air generated at the bottom of the homogenizing bin to obtain the finished product cement.
The invention has the beneficial effects that:
1. the modified VAE emulsion is added into the cement formula, so that the obtained modified cement has the characteristics of high impact resistance, good waterproof performance, strong corrosion resistance and large elasticity, and the service life is greatly prolonged;
2. under the combined action of the dispersing agent and the grinding aid, the cement keeps good homogeneity in the construction process, has balanced mechanical properties after hardening, and can greatly reduce the mixing proportion of cement clinker in the cement;
Detailed Description
The following provides a detailed description of embodiments of the invention.
Example 1:
the cement comprises, by weight, 40 parts of clinker, 10 parts of modified VAE emulsion, 5 parts of limestone, 4 parts of fly ash, 2 parts of fluorgypsum, 6 parts of foaming agent, 3 parts of black stone, 20 parts of granulated slag, 5 parts of mineral powder, 0.1 part of grinding aid, 1 part of dispersing agent and 1 part of stabilizing agent, wherein the foaming agent is α -sodium alkenyl sulfonate and sodium dodecyl sulfate, the dispersing agent is sodium naphthalene sulfonate formaldehyde condensate, and the stabilizing agent is sodium carboxymethylcellulose.
The modified VAE emulsion comprises the following materials in parts by weight: 45 parts of VAE, 5 parts of polyvinyl alcohol, 15 parts of vinyl acetate, 1 part of ammonium persulfate and 1 part of potassium persulfate.
The modified VAE emulsion is added in the cement formula, so that the obtained modified cement has the characteristics of high impact resistance, good waterproof performance, strong corrosion resistance and high elasticity, and the service life is greatly prolonged.
A method for preparing cement comprises the following steps:
step one, batching, namely adding 5 parts of limestone, 4 parts of fly ash, 2 parts of fluorgypsum, 3 parts of black stone, 20 parts of water granulated slag and 5 parts of mineral powder into a high-speed mixer, stirring and mixing for 20-30min at the temperature of 110 plus materials and 120 ℃ at the speed of 500 plus materials and 1000rpm, then adding a grinding aid, blending for 5-10min at the speed of 1500 plus materials and 2000rpm, and sending the mixture into a granulator for granulation, wherein the particle size is controlled to be 0.2-0.3mm, so as to obtain a mixture A for later use;
step two, pouring weighed VAE45 parts, polyvinyl alcohol 5 parts, vinyl acetate 15 parts, ammonium persulfate 1 part and potassium persulfate 1 part into a reaction kettle together for mixing and heating, stirring uniformly, and then preserving heat to prepare modified VAE emulsion for later use;
step three, pouring the modified VAE emulsion obtained in the step two into a stirrer for heating and stirring, controlling the stirring speed at 15-20 r/min, and then respectively adding 6 parts of weighed foaming agent and 1 part of weighed dispersing agent into the stirrer to be mixed with the modified VAE emulsion, heating and stirring, so that the mixture is in powder particles with uniform size; obtaining a mixture B for later use;
pouring 40 parts of weighed clinker into a stirrer, mixing and drying the clinker with the mixture A and the mixture B together, and drying for 15-30 minutes to obtain a dry mixture C;
and (V) adding the dry mixture C obtained in the step (IV) into a cement mill, conveying the mixed material from a grinding head of the cement mill into a finished product homogenizing bin by using a lifting machine, and homogenizing by using air generated at the bottom of the homogenizing bin to obtain the finished product cement.
Example 2:
the cement comprises the following preparation raw materials in parts by weight: the preparation raw materials comprise the following components in parts by weight: 52 parts of clinker aggregate, 12 parts of modified VAE emulsion, 6 parts of limestone, 5 parts of fly ash, 5 parts of fluorgypsum, 8 parts of foaming agent, 4 parts of black stone, 24 parts of granulated slag, 6 parts of mineral powder, 0.15 part of grinding aid, 2 parts of dispersing agent and 2 parts of stabilizing agent; the modified VAE emulsion comprises the following materials in parts by weight: 50 parts of VAE, 6 parts of polyvinyl alcohol, 16 parts of vinyl acetate, 2 parts of ammonium persulfate and 2 parts of potassium persulfate.
A method for preparing cement comprises the following steps:
step one, batching, namely adding 6 parts of limestone, 5 parts of fly ash, 5 parts of fluorgypsum, 4 parts of black stone, 24 parts of water granulated slag and 6 parts of mineral powder into a high-speed mixer, stirring and mixing for 20-30min at the temperature of 110 plus materials and 120 ℃ at the speed of 500 plus materials and 1000rpm, then adding a grinding aid, blending for 5-10min at the speed of 1500 plus materials and 2000rpm, and sending the mixture into a granulator for granulation, wherein the particle size is controlled to be 0.2-0.3mm, so as to obtain a mixture A for later use;
step two, pouring 50 parts of weighed VAE, 6 parts of polyvinyl alcohol, 16 parts of vinyl acetate, 2 parts of ammonium persulfate and 2 parts of potassium persulfate into a reaction kettle together for mixing and heating, stirring uniformly, and then preserving heat to prepare modified VAE emulsion for later use;
step three, pouring the modified VAE emulsion obtained in the step two into a stirrer for heating and stirring, controlling the stirring speed at 15-20 r/min, and then respectively adding 8 parts of weighed foaming agent and 2 parts of weighed dispersing agent into the stirrer to be mixed with the modified VAE emulsion, heating and stirring to enable the mixture to be in powder particles with uniform size; obtaining a mixture B for later use;
pouring 52 parts of weighed clinker into a stirrer, mixing and drying the clinker with the mixture A and the mixture B together, and drying for 15-30 minutes to obtain a dry mixture C;
and (V) adding the dry mixture C obtained in the step (IV) into a cement mill, conveying the mixed material from a grinding head of the cement mill into a finished product homogenizing bin by using a lifting machine, and homogenizing by using air generated at the bottom of the homogenizing bin to obtain the finished product cement.
Example 3:
the cement comprises the following preparation raw materials in parts by weight: the preparation raw materials comprise the following components in parts by weight: 52 parts of clinker aggregate, 12 parts of modified VAE emulsion, 6 parts of limestone, 5 parts of fly ash, 5 parts of fluorgypsum, 8 parts of foaming agent, 4 parts of black stone, 24 parts of granulated slag, 6 parts of mineral powder, 0.15 part of grinding aid, 2 parts of dispersing agent and 2 parts of stabilizing agent; the modified VAE emulsion comprises the following materials in parts by weight: 55 parts of VAE, 7 parts of polyvinyl alcohol, 18 parts of vinyl acetate, 3 parts of ammonium persulfate and 2 parts of potassium persulfate.
A method for preparing cement comprises the following steps:
step one, batching, namely adding 6 parts of limestone, 5 parts of fly ash, 5 parts of fluorgypsum, 4 parts of black stone, 24 parts of water granulated slag and 6 parts of mineral powder into a high-speed mixer, stirring and mixing for 20-30min at the temperature of 110 plus materials and 120 ℃ at the speed of 500 plus materials and 1000rpm, then adding a grinding aid, blending for 5-10min at the speed of 1500 plus materials and 2000rpm, and sending the mixture into a granulator for granulation, wherein the particle size is controlled to be 0.2-0.3mm, so as to obtain a mixture A for later use;
step two, pouring 55 parts of weighed VAE, 7 parts of polyvinyl alcohol, 18 parts of vinyl acetate, 3 parts of ammonium persulfate and 2 parts of potassium persulfate into a reaction kettle together for mixing and heating, stirring uniformly, and then preserving heat to prepare modified VAE emulsion for later use;
step three, pouring the modified VAE emulsion obtained in the step two into a stirrer for heating and stirring, controlling the stirring speed at 15-20 r/min, and then respectively adding 8 parts of weighed foaming agent and 2 parts of weighed dispersing agent into the stirrer to be mixed with the modified VAE emulsion, heating and stirring to enable the mixture to be in powder particles with uniform size; obtaining a mixture B for later use;
pouring 52 parts of weighed clinker into a stirrer, mixing and drying the clinker with the mixture A and the mixture B together, and drying for 15-30 minutes to obtain a dry mixture C;
and (V) adding the dry mixture C obtained in the step (IV) into a cement mill, conveying the mixed material from a grinding head of the cement mill into a finished product homogenizing bin by using a lifting machine, and homogenizing by using air generated at the bottom of the homogenizing bin to obtain the finished product cement.
Example 4:
the cement comprises the following preparation raw materials in parts by weight: the preparation raw materials comprise the following components in parts by weight: 58 parts of clinker, 12 parts of modified VAE emulsion, 7 parts of limestone, 6 parts of fly ash, 5 parts of fluorgypsum, 9 parts of foaming agent, 6 parts of black stone, 28 parts of granulated slag, 8 parts of mineral powder, 0.2 part of grinding aid, 3 parts of dispersing agent and 3 parts of stabilizing agent; the modified VAE emulsion comprises the following materials in parts by weight: 55 parts of VAE, 7 parts of polyvinyl alcohol, 18 parts of vinyl acetate, 3 parts of ammonium persulfate and 2 parts of potassium persulfate.
A method for preparing cement comprises the following steps:
step one, material preparation, namely adding 7 parts of limestone, 6 parts of fly ash, 5 parts of fluorgypsum, 6 parts of black stone, 28 parts of water granulated slag and 8 parts of mineral powder into a high-speed mixer, stirring and mixing for 20-30min at the temperature of 110-;
step two, pouring 55 parts of weighed VAE, 7 parts of polyvinyl alcohol, 18 parts of vinyl acetate, 3 parts of ammonium persulfate and 2 parts of potassium persulfate into a reaction kettle together for mixing and heating, stirring uniformly, and then preserving heat to prepare modified VAE emulsion for later use;
step three, pouring the modified VAE emulsion obtained in the step two into a stirrer for heating and stirring, controlling the stirring speed at 15-20 r/min, and then respectively adding 9 parts of weighed foaming agent and 3 parts of weighed dispersing agent into the stirrer to be mixed with the modified VAE emulsion, heating and stirring to enable the mixture to be in powder particles with uniform size; obtaining a mixture B for later use;
step four, pouring 58 parts of weighed clinker into a stirrer to be mixed and dried with the mixture A and the mixture B together, and drying for 15-30 minutes to obtain a dry mixture C;
and (V) adding the dry mixture C obtained in the step (IV) into a cement mill, conveying the mixed material from a grinding head of the cement mill into a finished product homogenizing bin by using a lifting machine, and homogenizing by using air generated at the bottom of the homogenizing bin to obtain the finished product cement.
Example 5:
the cement comprises the following preparation raw materials in parts by weight: the preparation raw materials comprise the following components in parts by weight: 58 parts of clinker, 12 parts of modified VAE emulsion, 7 parts of limestone, 6 parts of fly ash, 5 parts of fluorgypsum, 9 parts of foaming agent, 6 parts of black stone, 28 parts of granulated slag, 8 parts of mineral powder, 0.2 part of grinding aid, 3 parts of dispersing agent and 3 parts of stabilizing agent; the modified VAE emulsion comprises the following materials in parts by weight: 59 parts of VAE, 7 parts of polyvinyl alcohol, 20 parts of vinyl acetate, 4 parts of ammonium persulfate and 3 parts of potassium persulfate.
A method for preparing cement comprises the following steps:
step one, material preparation, namely adding 7 parts of limestone, 6 parts of fly ash, 5 parts of fluorgypsum, 6 parts of black stone, 28 parts of water granulated slag and 8 parts of mineral powder into a high-speed mixer, stirring and mixing for 20-30min at the temperature of 110-;
step two, pouring 59 parts of weighed VAE, 7 parts of polyvinyl alcohol, 20 parts of vinyl acetate, 4 parts of ammonium persulfate and 3 parts of potassium persulfate into a reaction kettle together for mixing and heating, stirring uniformly, and then preserving heat to prepare modified VAE emulsion for later use;
step three, pouring the modified VAE emulsion obtained in the step two into a stirrer for heating and stirring, controlling the stirring speed at 15-20 r/min, and then respectively adding 9 parts of weighed foaming agent and 3 parts of weighed dispersing agent into the stirrer to be mixed with the modified VAE emulsion, heating and stirring to enable the mixture to be in powder particles with uniform size; obtaining a mixture B for later use;
step four, pouring 58 parts of weighed clinker into a stirrer to be mixed and dried with the mixture A and the mixture B together, and drying for 15-30 minutes to obtain a dry mixture C;
and (V) adding the dry mixture C obtained in the step (IV) into a cement mill, conveying the mixed material from a grinding head of the cement mill into a finished product homogenizing bin by using a lifting machine, and homogenizing by using air generated at the bottom of the homogenizing bin to obtain the finished product cement.
Example 6:
the cement comprises the following preparation raw materials in parts by weight: 60 parts of clinker, 15 parts of modified VAE emulsion, 10 parts of limestone, 6 parts of fly ash, 5 parts of fluorgypsum, 10 parts of foaming agent, 7 parts of black stone, 30 parts of granulated slag, 10 parts of mineral powder, 0.5 part of grinding aid, 3 parts of dispersing agent and 3 parts of stabilizing agent; the modified VAE emulsion comprises the following materials in parts by weight: 59 parts of VAE, 7 parts of polyvinyl alcohol, 20 parts of vinyl acetate, 4 parts of ammonium persulfate and 3 parts of potassium persulfate.
A method for preparing cement comprises the following steps:
step one, batching, namely adding 10 parts of limestone, 6 parts of fly ash, 5 parts of fluorgypsum, 7 parts of black stone, 30 parts of water granulated slag and 10 parts of mineral powder into a high-speed mixer, stirring and mixing for 20-30min at the temperature of 110-;
step two, pouring 59 parts of weighed VAE, 7 parts of polyvinyl alcohol, 20 parts of vinyl acetate, 4 parts of ammonium persulfate and 3 parts of potassium persulfate into a reaction kettle together for mixing and heating, stirring uniformly, and then preserving heat to prepare modified VAE emulsion for later use;
step three, pouring the modified VAE emulsion obtained in the step two into a stirrer for heating and stirring, controlling the stirring speed at 15-20 r/min, then respectively adding 10 parts of weighed foaming agent and 3 parts of weighed dispersing agent into the stirrer to be mixed with the modified VAE emulsion, heating and stirring, and enabling the mixture to be in powder particles with uniform size; obtaining a mixture B for later use;
pouring 60 parts of weighed clinker into a stirrer to be mixed and dried with the mixture A and the mixture B together, and drying for 15-30 minutes to obtain a dry mixture C;
and (V) adding the dry mixture C obtained in the step (IV) into a cement mill, conveying the mixed material from a grinding head of the cement mill into a finished product homogenizing bin by using a lifting machine, and homogenizing by using air generated at the bottom of the homogenizing bin to obtain the finished product cement.
The main performance detection indexes of the cement are as follows:
| inspection item | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 |
| Initial fluidity mm | 322 | 315 | 318 | 320 | 325 | 328 |
| Fluidity mm in 30 minutes | 276 | 274 | 275 | 280 | 282 | 285 |
| 3 days rupture strength MPa | 9.2 | 9.2 | 9.5 | 9.8 | 9.8 | 10.0 |
| 28 days rupture strength MPa | 14.2 | 14.5 | 14.6 | 14.8 | 15.0 | 15.0 |
| Compressive strength MPa in 3 days | 32.8 | 33.0 | 33.2 | 33.5 | 33.3 | 33.8 |
| 28 days compressive strength MPa | 61.3 | 61.8 | 62.0 | 62.3 | 62.5 | 62.9 |
| Reference value | 》290 | 》260 | 》4.5 | 》7.5 | 》23 | 》52.5 |
The performance indexes of the high-performance cement, such as fluidity, breaking strength, compressive strength and the like, all accord with the national standard and the industrial standard.
The test data in the table can show that the cement prepared by the design scheme also has obvious advantages in the aspects of fluidity, compression resistance and fracture resistance.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The cement is characterized in that the preparation raw materials comprise, by weight, 40-60 parts of clinker, 10-15 parts of modified VAE emulsion, 5-10 parts of limestone, 4-6 parts of fly ash, 2-5 parts of fluorgypsum, 6-10 parts of foaming agent, 3-7 parts of black stone, 20-30 parts of water granulated slag, 5-10 parts of mineral powder, 0.1-0.5 part of grinding aid, 1-3 parts of dispersing agent and 1-3 parts of stabilizing agent, wherein the foaming agent is α -sodium alkenyl sulfonate and sodium dodecyl sulfonate.
2. A cement according to claim 1, characterized in that: the preparation raw materials comprise the following components in parts by weight: 40 parts of clinker, 10 parts of modified VAE emulsion, 5 parts of limestone, 4 parts of fly ash, 2 parts of fluorgypsum, 6 parts of foaming agent, 3 parts of black stone, 20 parts of granulated slag, 5 parts of mineral powder, 0.1 part of grinding aid, 1 part of dispersing agent and 1 part of stabilizing agent.
3. A cement according to claim 1, characterized in that: the preparation raw materials comprise the following components in parts by weight: 60 parts of clinker, 15 parts of modified VAE emulsion, 10 parts of limestone, 6 parts of fly ash, 5 parts of fluorgypsum, 10 parts of foaming agent, 7 parts of black stone, 30 parts of granulated slag, 10 parts of mineral powder, 0.5 part of grinding aid, 3 parts of dispersing agent and 3 parts of stabilizing agent.
4. A cement according to claim 1, characterized in that: the preparation raw materials comprise the following components in parts by weight: 52 parts of clinker aggregate, 12 parts of modified VAE emulsion, 6 parts of limestone, 5 parts of fly ash, 6 parts of fluorgypsum, 8 parts of foaming agent, 4 parts of black stone, 24 parts of granulated slag, 6 parts of mineral powder, 0.15 part of grinding aid, 2 parts of dispersing agent and 2 parts of stabilizing agent.
5. A cement according to claim 1, characterized in that: the modified VAE emulsion comprises the following materials in parts by weight: the adhesive comprises, by weight, 5-59 parts of VAE45, 5-7 parts of polyvinyl alcohol, 15-20 parts of vinyl acetate, 1-4 parts of ammonium persulfate and 1-3 parts of potassium persulfate.
6. A cement according to claim 5, characterized in that: the modified VAE emulsion comprises the following materials in parts by weight: 45 parts of VAE, 5 parts of polyvinyl alcohol, 15 parts of vinyl acetate, 1 part of ammonium persulfate and 1 part of potassium persulfate.
7. A cement according to claim 5, characterized in that: the modified VAE emulsion comprises the following materials in parts by weight: 59 parts of VAE, 7 parts of polyvinyl alcohol, 20 parts of vinyl acetate, 4 parts of ammonium persulfate and 3 parts of potassium persulfate.
8. A cement according to claim 1 or 2 or 3 or 4, characterized in that: the dispersant is sodium naphthalenesulfonate formaldehyde condensate
9. A cement according to claim 1 or 2 or 3 or 4, characterized in that: the stabilizer is sodium carboxymethyl cellulose.
10. A method of producing a cement according to any of claims 1 to 9, characterized in that: the method comprises the following steps:
step one, adding limestone, fly ash, fluorgypsum, black stone, water granulated slag and mineral powder into a high-speed mixer, stirring and mixing at the temperature of 110-;
pouring the weighed VAE, polyvinyl alcohol, vinyl acetate, ammonium persulfate and potassium persulfate into a reaction kettle together for mixing and heating, uniformly stirring, and preserving heat to prepare a modified VAE emulsion for later use;
step three, pouring the modified VAE emulsion obtained in the step two into a stirrer for heating and stirring, controlling the stirring speed at 15-20 r/min, then respectively adding the weighed foaming agent and the weighed dispersing agent into the stirrer for mixing with the modified VAE emulsion, heating and stirring, so that the mixture is in the form of powder particles with uniform size; obtaining a mixture B for later use;
pouring the weighed clinker into a stirrer to be mixed and dried together with the mixture A and the mixture B, and drying for 15-30 minutes to obtain a dry mixture C;
and (V) adding the dry mixture C obtained in the step (IV) into a cement mill, conveying the mixed material from a grinding head of the cement mill into a finished product homogenizing bin by using a lifting machine, and homogenizing by using air generated at the bottom of the homogenizing bin to obtain the finished product cement.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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