CN111072346A - Sand-blasting pavement product and preparation method thereof - Google Patents
Sand-blasting pavement product and preparation method thereof Download PDFInfo
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- CN111072346A CN111072346A CN201911310492.3A CN201911310492A CN111072346A CN 111072346 A CN111072346 A CN 111072346A CN 201911310492 A CN201911310492 A CN 201911310492A CN 111072346 A CN111072346 A CN 111072346A
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention provides a sand blasting pavement product and a preparation method thereof, wherein the product comprises a surface layer and a bottom layer, the raw material components of the surface layer comprise electric furnace roller slag aggregate, yellow sand, cement and mineral powder, and the raw material components of the bottom layer comprise converter roller slag aggregate, cement, stone chips and silicon micropowder.
Description
Technical Field
The invention relates to the field of building material products, in particular to a sand blasting pavement product and a preparation method thereof.
Background
With the improvement of living standard, the outdoor public pavement paving material not only has higher requirements on quality, but also has more functions such as skid resistance, wear resistance, water permeability and the like. In addition, with the continuous development of the construction industry, natural building material resources are gradually shrunk, the energy consumption is continuously increased, and industrial waste is used as an idle resource and is increasingly applied to the field of building materials, so that the effects of saving energy, reducing consumption, reducing cost and lightening environmental load are achieved.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a sand-blasted pavement product and a preparation method thereof, which are used for reducing the manufacturing cost of the pavement product and improving the skid resistance and wear resistance of the pavement product.
In order to achieve the above and other related objects, the present invention provides, in a first aspect, a sand-blasted pavement product comprising a top layer and a bottom layer, the top layer comprising electric furnace drum slag aggregates, yellow sand, cement, and mineral powder as raw material components, and the bottom layer comprising converter drum slag aggregates, cement, stone dust, and silica fume;
in the surface layer raw material components, the mass percent of the electric furnace roller slag aggregate is 55-70 wt%, the mass percent of the yellow sand is 10-25 wt%, the mass percent of the cement is 10-25 wt%, and the mass percent of the mineral powder is 5-15 wt% based on the total mass of the electric furnace roller slag aggregate, the yellow sand, the cement and the mineral powder;
in the bottom layer raw material components, the mass percent of the converter roller slag aggregate is 60-70 wt%, the mass percent of the cement is 13-18 wt%, the total mass of the stone chippings is 12-27 wt%, and the addition amount of the silica micro powder is 0.5-1.5 wt% of the mass of the cement in the bottom layer raw material, based on the total mass of the converter roller slag aggregate, the cement and the stone chippings.
In one embodiment, the sandblasted pavement article comprises any one or more of the following features:
1) the cement is selected from 42.5-grade ordinary portland cement or 42.5-grade white portland cement;
2) the grain size of the electric furnace roller slag aggregate is 0.5-3mm, and the interval screening content is more than or equal to 85%;
3) the particle size of the converter roller slag aggregate is not more than 6 mm;
4) the particle size of the stone chips is not more than 5mm, and the loss on ignition is not more than 8%.
In one embodiment, the ore powder is S95 ore powder.
In one embodiment, the silica micropowder is produced by Shanghai Botong chemical Co., Ltd, and has a particle size of: 600 meshes.
In one embodiment, the mineral powder is produced by Nanjing Baiyang chemical Co.
In one embodiment, the electric furnace roller slag aggregate is produced by Shanghai environmental engineering and technology Limited, and has a free calcium F.CaO content of less than 3% and a total iron MFe content of less than or equal to 1%.
In one embodiment, the converter roller slag aggregate is produced by Shanghai environmental engineering and technology Limited, and has a free calcium F.CaO content of less than 3% and a total iron MFe content of less than or equal to 1%.
In one embodiment, the stone chips are produced by Shanghai Yusha industries, Inc. and have a particle size of not greater than 5 mm.
In one embodiment, the yellow sand is a zone II sand produced by Shanghai Yusha industries, Inc.
In one embodiment, the cement is PO42.5 cement manufactured by taicang conch cement limited.
The invention also provides a method for making the sand-blasted pavement product, which comprises the following steps:
mixing the raw material components in the surface layer and adding water to obtain a fabric; mixing the raw material components in the bottom layer and adding water to obtain a bottom material; and forming, sandblasting and maintaining the fabric and the base material to obtain the sandblasted pavement product.
In one embodiment, the surface raw material component mixing comprises weighing electric furnace roller slag aggregate, yellow sand and mineral powder, adding the electric furnace roller slag aggregate, the yellow sand and the mineral powder into a surface material stirring machine for stirring, adding the weighed cement into the surface material stirring machine for uniformly stirring, and finally adding water at a constant speed for stirring.
In one embodiment, the mixing of the raw material components for the bottom layer comprises weighing converter drum slag aggregates, stone chips and silicon micro powder, adding the weighed cement into a bottom material stirrer for stirring, then adding the weighed cement into the bottom material stirrer for stirring continuously, and finally adding water at a constant speed for stirring.
In one embodiment, the total time for mixing and stirring the surface layer is 120-200 seconds
In one embodiment, the total time for the bottom layer mixing and stirring is 60 to 90 seconds.
In one embodiment, the water content in the fabric is 5-6 wt% of the total mass of the electric furnace roller slag aggregate, the yellow sand, the cement and the mineral powder, and the water content in the backing material is 5-6 wt% of the total mass of the converter roller slag aggregate, the stone chips, the silica fume and the cement.
In one embodiment, the sand blasting is carried out by using a sand blasting machine, the blasting material for sand blasting is 20-40 meshes of steel slag sand, the sand blasting speed is 40-60m/s, and the sand blasting air pressure is 50-150 MPa.
In one embodiment, the curing is steam curing, the curing humidity is 85% -95%, and the curing includes: standing at room temperature for 2-3 hours, heating to 60-70 deg.C from room temperature, maintaining for 2-3 hours, heating to 80-90 deg.C, maintaining for 2-3 hours, and cooling to room temperature for 4-5 hours.
The invention utilizes the characteristic of high hardness of the electric furnace roller slag as a functional layer to improve the wear resistance and the skid resistance of the product, has unique appearance after surface sand blasting treatment, replaces part of cement by utilizing the characteristic of potential hydraulic activity of the converter roller slag aggregate, not only reduces the production cost, but also can reduce the hydration heat of the cement and improve the later strength of concrete products. The free alkali content in the concrete can be reduced by using the silica fume, so that the impermeability of the hardened concrete is greatly improved, and the strength of the product is effectively ensured.
The cement hydration speed can be accelerated by steam curing, the early strength of the product is obviously improved, the steam curing temperature does not change along with seasons, and the production efficiency of the product is greatly improved. The sand blasting adopts compressed air as power, forms high-speed jet flow by abrasive particles and sprays the abrasive particles on the surface of a product to be treated, so that the appearance or the shape of the sand blasting surface of the product is changed, the surface of the product obtains certain roughness by utilizing the impact and the cutting action of an abrasive on the surface, and simultaneously the mechanical property of the surface of the product is improved, thereby improving the fatigue resistance of the product. When the product is practically applied to surface coating, the adhesive force between the surface and the coating can be increased, the durability of the coating is prolonged, and the leveling and decoration of the coating are facilitated. Mineral powder is traditional industrial waste residue, belongs to a pozzolanic active material, S95 mineral powder can replace cement in equal amount and is doped into a product surface layer, the product can still reach the design strength, the mineral powder is low in price, the mineral powder is used for replacing a part of cement, the production cost is reduced, the environmental protection is facilitated, resources are saved, and the like, after the mineral powder is used for replacing a part of cement, the product cost can be reduced by about 18-25 yuan/square meter, and the economic and social benefits are good.
Drawings
FIG. 1 shows a flow chart of the preparation method of the present invention.
FIG. 2 is a process diagram of the preparation method of the present invention.
Detailed Description
The present invention is further illustrated below with reference to specific examples, which are intended to be illustrative only and not to limit the scope of the invention.
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
As shown in fig. 1 to 2, the present invention provides a sandblasted pavement product comprising a top layer and a bottom layer, wherein the top layer comprises the following raw material components: the weight percentage of the electric furnace roller slag aggregate can be 55-70 wt%, the weight percentage of the yellow sand can be 10-25 wt%, the weight percentage of the cement can be 10-25 wt%, the weight percentage of the mineral powder is 5-15 wt%, the mineral powder can be S95 mineral powder, and the addition amount of water in the surface layer component can be 5-6 wt% of the total weight of the electric furnace roller slag aggregate, the yellow sand, the cement and the mineral powder. The surface layer raw material component of the sand-blasted pavement product can also comprise a pigment, and the pigment can be added according to market demands.
In the surface raw material component, the grain size of the electric furnace roller slag aggregate can be 0.5-3mm, the screening content in a section can be more than or equal to 85%, and the section can be distinguished according to the requirements of customers, for example, the grain size can be 1-2mm, and the grain size can be 2-3 mm.
The bottom layer can comprise raw material components of converter roller slag aggregate, cement, stone chips, silicon powder and water, wherein the mass percentage of the converter roller slag aggregate can be 60-70 wt%, the mass percentage of the cement can be 13-18 wt%, the mass percentage of the stone chips can be 12-27 wt%, the mass of the silicon powder is 0.5-1.5 wt% of the mass of the cement in the bottom layer, the particle size of the stone chips can be not more than 5mm, and the ignition loss can be less than or equal to 8%. The addition amount of water in the bottom layer component can be 5-6 wt% of the total mass of the converter roller slag aggregate, the cement and the stone chips.
The cement used in the face and base layers may be either a grade 42.5 portland cement or a grade 42.5 white portland cement, the choice of cement being selected according to the color of the article. The electric furnace roller slag aggregate can be prepared by crushing and screening electric furnace roller raw materials, and the converter roller slag aggregate can be obtained by crushing and screening converter roller slag raw materials.
The invention also provides a preparation method of the sand-blasting pavement product, which comprises three steps of S1-S3:
s1: mixing the raw material components in the surface layer to obtain a fabric; s2: mixing the raw material components in the bottom layer to obtain a bottom material; s3: and forming, sandblasting and maintaining the fabric and the base material to obtain the sandblasted pavement product.
In step S1, the mixing of the raw material components in the surface layer may include stirring the weighed slag aggregates of the electric furnace roller, the yellow sand, and the mineral powder in a surface material stirrer for 20-30 seconds, then putting the weighed cement in the surface material stirrer for uniform stirring for 40-50 seconds, and adding water at a constant speed by using an automatic water adding device for stirring, wherein the time for stirring with water at a constant speed may be 60-120 seconds, and the stirring mode enables the materials to be stirred uniformly and prevents the surface material from agglomerating.
In step S2, the mixing of the raw material components in the bottom layer may include adding the weighed converter drum slag aggregate, cement, stone chips, and silica powder into a basic material stirrer to be uniformly stirred for 15-25 seconds, then putting the weighed cement into the basic material stirrer to be uniformly stirred for 25-35 seconds, and adding water at a constant speed by using an automatic water adding device to be stirred, wherein the time for stirring with water at a constant speed may be 20-30 seconds.
In step S3, the forming process may include feeding the stirred top material and bottom material into a top material distribution box and a bottom material distribution box of a forming machine, respectively, and pressing the bricks with a tiger brand 4VS brick press, the sand blasting process may include sand blasting the formed bricks with a sand blasting machine, the sand blasting process may use 20-40 mesh steel slag special molding sand produced by shanghai metallurgical engineering and technology limited, the sand blasting speed may be 40-60m/S, the sand blasting machine air pressure may be 50-150Mpa, the curing process may be steam curing, the curing process may include cleaning up the surface debris of the bricks, and then feeding the bricks into a steam curing kiln for curing, the curing process may include standing at room temperature for 2-3 hours, then curing at a temperature rising rate of 10-20 ℃/hour from room temperature to 60-70 ℃ for 2-3 hours, and heating to 80-90 ℃ at a heating rate of 10-20 ℃/h, maintaining for 2-3 h, keeping the humidity at 85% -95% in the whole process, slowly cooling to room temperature after the maintenance is finished, slowly stopping steam, uniformly cooling and keeping the humidity constant in the cooling process, wherein the cooling process can last for 4-5 h, and the maintained product can be discharged from a kiln and stacked.
The method of making the sandblasted pavement article is further illustrated by the specific examples below.
The silicon micro powder in the specific embodiment of the invention is produced by Shanghai Botong chemical Co., Ltd, and has the particle size: 600 meshes. The mineral powder is produced by Nanjing Baiyang chemical Co. The electric furnace roller slag aggregate is produced by Shanghai metallurgy environmental engineering technology limited company, the free calcium F.CaO content of the electric furnace roller slag aggregate is less than 3%, the total iron MFe content of the electric furnace roller slag aggregate is less than or equal to 1%, the particle size of the electric furnace roller slag aggregate is 0.5-3mm, the electric furnace roller slag aggregate is produced by the Shanghai metallurgy environmental engineering technology limited company, the free calcium F.CaO content of the electric furnace roller slag aggregate is less than 3%, the total iron MFe content of the electric furnace roller slag aggregate is less than or equal to. The stone chips are produced by Shanghai Yusha industry Co Ltd, and the particle size is not more than 5 mm. The yellow sand is the sand in the second district produced by Shanghai Yusha industries, Ltd. The cement is PO42.5 cement produced by Taicang conch cement company.
In one embodiment, the method of making the sandblasted pavement article comprises the steps of: collecting the electric furnace roller slag: 80 wt%, yellow sand: 10%, S95 ore powder: 10%, mixing and stirring for 20 seconds, then adding cement: 20 percent, continuously stirring for 40 seconds, and finally adding water at a constant speed and stirring for 100 seconds to obtain the fabric, wherein the adding amount of the water is 5 percent by weight of the total mass of the electric furnace roller slag aggregate, the yellow sand, the cement and the mineral powder.
Aggregating converter roller slag: 70 wt%, stone chips: 27 wt%, microsilica: the mass is 0.5 wt% of cement, and the mass is as follows: 13 wt%, and finally adding water at a constant speed and stirring for 120 seconds to obtain a base material, wherein the addition amount of the water is 5 wt% of the total mass of the converter roller slag aggregate, the stone chips, the micro silicon powder and the cement.
Feeding the stirred fabric and the bottom material into a material distribution box of a forming machine, pressing and forming by using a tiger brand 4VS type brick press, and performing sand blasting treatment on the pressed product by using a sand blasting machine at the sand blasting speed of 50m/s and the air pressure of 100 MPa; cleaning up the scraps on the surface of the adobe brick, and conveying the adobe brick into a steam curing kiln for curing. Wherein: standing at room temperature for 2 hours, heating from room temperature to 60 ℃ at the heating rate of 20 ℃/hour, then curing for 2 hours, heating to 80 ℃ at the heating rate of 20 ℃/hour, then curing for 2 hours to obtain a sample 1, keeping the humidity at 95% in the whole process, slowly stopping steam during cooling to room temperature, uniformly cooling, keeping the humidity for about 4 hours, and finally taking out of a kiln for stacking.
The 28-day compressive strength of the test sample 1 is 41.7MPa, the length of the grinding pit is 29mm, and the requirements that the compressive strength is more than or equal to 40.0 and the length of the grinding pit is less than or equal to 32mm in GB28635-2012 concrete pavement bricks are met.
In one embodiment, the method of making the sandblasted pavement article comprises the steps of: collecting the electric furnace roller slag: 65 wt%, yellow sand: 20%, S95 ore powder: 5%, mixing and stirring for 20 seconds, then adding cement: 10 percent of the mixture is continuously stirred for 40 seconds, and finally the fabric is obtained by adding water at constant speed and stirring for 100 seconds, wherein the adding amount of the water is 5 percent of the total mass of the electric furnace roller slag aggregate, the yellow sand, the cement and the mineral powder.
Aggregating converter roller slag: 65 wt%, stone chips: 20 wt%, silica fume: the mass is 0.5 wt% of cement, and the mass is as follows: 15 wt%, and finally adding water at a constant speed and stirring for 120 seconds to obtain a base material, wherein the addition amount of the water is 5% of the total mass of the converter roller slag aggregate, the stone chips, the micro silicon powder and the cement.
Feeding the stirred fabric and the bottom material into a material distribution box of a forming machine, pressing and forming by using a tiger brand 4VS type brick press, and performing sand blasting treatment on the pressed product by using a sand blasting machine at the sand blasting speed of 50m/s and the air pressure of 100 MPa; cleaning up the scraps on the surface of the adobe brick, and conveying the adobe brick into a steam curing kiln for curing. Wherein: standing at room temperature for 2 hours, heating from room temperature to 60 ℃ at the heating rate of 20 ℃/hour, then curing for 2 hours, heating to 80 ℃ at the heating rate of 20 ℃/hour, then curing for 2 hours to obtain a sample 2, keeping the humidity at 95% in the whole process, slowly stopping steam during the process of cooling to room temperature, uniformly cooling, keeping the humidity for about 4 hours, and finally taking out of a kiln for stacking.
The 28-day compressive strength of the sample 2 is 44.3MPa, the length of the grinding pit is 27mm, and the requirements that the compressive strength is more than or equal to 40.0 and the length of the grinding pit is less than or equal to 32mm in GB28635-2012 concrete pavement bricks are met.
In one embodiment, the method of making the sandblasted pavement article comprises the steps of: collecting the electric furnace roller slag: 60 wt%, yellow sand: 20%, S95 ore powder: 10%, mixing and stirring for 20 seconds, then adding cement: 10 percent, continuously stirring for 40 seconds, and finally adding water at a constant speed and stirring for 100 seconds to obtain the fabric, wherein the adding amount of the water is 5 percent by weight of the total mass of the electric furnace roller slag aggregate, the yellow sand, the cement and the mineral powder.
Aggregating converter roller slag: 60 wt%, stone chips: 25 wt%, silica fume: the mass is 0.5 wt% of cement, and the mass is as follows: 15 wt%, and finally adding water at a constant speed and stirring for 120 seconds to obtain a base material, wherein the addition amount of the water is 5 wt% of the total mass of the converter roller slag aggregate, the stone chips, the micro silicon powder and the cement.
Feeding the stirred fabric and the bottom material into a material distribution box of a forming machine, pressing and forming by using a tiger brand 4VS type brick press, and performing sand blasting treatment on the pressed product by using a sand blasting machine at the sand blasting speed of 50m/s and the air pressure of 100 MPa; cleaning up the scraps on the surface of the adobe brick, and conveying the adobe brick into a steam curing kiln for curing. Wherein: standing at room temperature for 2 hours, heating from room temperature to 60 ℃ at the heating rate of 20 ℃/hour, then curing for 2 hours, heating to 80 ℃ at the heating rate of 20 ℃/hour, then curing for 2 hours to obtain a sample 3, keeping the humidity at 95% in the whole process, slowly stopping steam during cooling to room temperature, uniformly cooling, keeping the humidity for about 4 hours, and finally taking out of a kiln for stacking.
The 28-day compressive strength of the test sample 3 is 42.1MPa, the length of the grinding pit is 27mm, and the requirements that the compressive strength is more than or equal to 40.0 and the length of the grinding pit is less than or equal to 32mm in GB28635-2012 concrete pavement bricks are met.
In one embodiment, the method of making the sandblasted pavement article comprises the steps of: collecting the electric furnace roller slag: 55 wt%, yellow sand: 25%, S95 ore powder: 10%, mixing and stirring for 20 seconds, then adding cement: 10 percent, continuously stirring for 40 seconds, and finally adding water at a constant speed and stirring for 100 seconds to obtain the fabric, wherein the adding amount of the water is 5 percent by weight of the total mass of the electric furnace roller slag aggregate, the yellow sand, the cement and the mineral powder.
Aggregating converter roller slag: 70 wt%, stone chips: 12 wt%, silica fume: the mass is 0.5 wt% of cement, and the mass is as follows: 18 wt%, and finally adding water at a constant speed and stirring for 120 seconds to obtain a base material, wherein the addition amount of the water is 5 wt% of the total mass of the converter roller slag aggregate, the stone chips, the micro silicon powder and the cement.
Feeding the stirred fabric and the bottom material into a material distribution box of a forming machine, pressing and forming by using a tiger brand 4VS type brick press, and performing sand blasting treatment on the pressed product by using a sand blasting machine at the sand blasting speed of 50m/s and the air pressure of 100 MPa; cleaning up the scraps on the surface of the adobe brick, and conveying the adobe brick into a steam curing kiln for curing. Wherein: standing at room temperature for 2 hours, heating from room temperature to 60 ℃ at the heating rate of 20 ℃/hour, then curing for 2 hours, heating to 80 ℃ at the heating rate of 20 ℃/hour, then curing for 2 hours to obtain a sample 4, keeping the humidity at 95% in the whole process, slowly stopping steam during cooling to room temperature, uniformly cooling, keeping the humidity for about 4 hours, and finally taking out of a kiln for stacking.
The 28-day compressive strength of the test sample 4 is 40.5MPa, the length of the grinding pit is 24mm, and the requirements that the compressive strength is more than or equal to 40.0 and the length of the grinding pit is less than or equal to 32mm in GB28635-2012 concrete pavement bricks are met.
In one embodiment, the method of making the sandblasted pavement article comprises the steps of: collecting the electric furnace roller slag: 55 wt%, yellow sand: 25%, S95 ore powder: 10%, mixing and stirring for 20 seconds, then adding cement: 10 percent, continuously stirring for 40 seconds, and finally adding water at a constant speed and stirring for 100 seconds to obtain the fabric, wherein the adding amount of the water is 5 percent by weight of the total mass of the electric furnace roller slag aggregate, the yellow sand, the cement and the mineral powder.
Aggregating converter roller slag: 70 wt%, stone chips: 12 wt%, silica fume: the mass is 0.5 wt% of cement, and the mass is as follows: 18 wt%, and finally adding water at a constant speed and stirring for 120 seconds to obtain a base material, wherein the addition amount of the water is 5 wt% of the total mass of the converter roller slag aggregate, the stone chips, the micro silicon powder and the cement.
Feeding the stirred fabric and the bottom material into a material distribution box of a forming machine, pressing and forming by using a tiger brand 4VS type brick press, and performing sand blasting treatment on the pressed product by using a sand blasting machine at the sand blasting speed of 50m/s and the air pressure of 100 MPa; and cleaning up the scraps on the surface of the adobe brick, and then maintaining to obtain a comparative sample 1. The curing temperature is 25 ℃, the curing time is 24 hours, and the curing humidity is 65 percent.
The 28-day compressive strength of the comparison sample 1 is 40.0MPa, the length of the grinding pit is 24mm, and the requirements that the compressive strength is more than or equal to 40.0 and the length of the grinding pit is less than or equal to 32mm in GB28635-2012 concrete pavement bricks are met.
As can be seen from the sample 4 and the comparative sample 1, the compressive strength of the product subjected to the original ordinary indoor curing for 24 hours can be achieved after the steam curing is carried out for about 8 hours, and the production efficiency is further improved. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value. The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A sandblasted pavement article characterized by: the product comprises a surface layer and a bottom layer, wherein the raw material components of the surface layer comprise electric furnace roller slag aggregates, yellow sand, cement and mineral powder, and the raw material components of the bottom layer comprise converter roller slag aggregates, cement, stone chips and silica micropowder;
in the surface layer raw material components, the mass percent of the electric furnace roller slag aggregate is 55-70 wt%, the mass percent of the yellow sand is 10-25 wt%, the mass percent of the cement is 10-25 wt%, and the mass percent of the mineral powder is 5-15 wt% based on the total mass of the electric furnace roller slag aggregate, the yellow sand, the cement and the mineral powder;
in the bottom layer raw material components, the mass percent of the converter roller slag aggregate is 60-70 wt%, the mass percent of the cement is 13-18 wt%, the total mass of the stone chippings is 12-27 wt%, and the addition amount of the silica micro powder is 0.5-1.5 wt% of the mass of the cement in the bottom layer raw material, based on the total mass of the converter roller slag aggregate, the cement and the stone chippings.
2. A sandblasted pavement article as claimed in claim 1, wherein: the sandblasted pavement article comprises any one or more of the following features:
1) the cement is selected from 42.5-grade ordinary portland cement or 42.5-grade white portland cement;
2) the grain size of the electric furnace roller slag aggregate is 0.5-3mm, and the interval screening content is more than or equal to 85%;
3) the particle size of the converter roller slag aggregate is not more than 6 mm;
4) the particle size of the stone chips is not more than 5mm, and the loss on ignition is not more than 8%.
3. A method of making a sandblasted pavement article as claimed in any one of claims 1 to 2, characterized in that: the method comprises the following steps:
mixing the raw material components in the surface layer and adding water to obtain a fabric;
mixing the raw material components in the bottom layer and adding water to obtain a bottom material;
and forming, sandblasting and maintaining the fabric and the base material to obtain the sandblasted pavement product.
4. The method of claim 3, wherein: the surface raw material components are mixed, the mixture comprises electric furnace roller slag aggregate, yellow sand and mineral powder which are weighed and added into a fabric stirrer for stirring, the weighed cement is put into the fabric stirrer for uniform stirring,
finally, water is added at a constant speed for stirring.
5. The method of claim 3, wherein: the mixing of the raw material components at the bottom layer comprises weighing converter drum slag aggregate, stone chips and silicon micro powder, adding the weighed cement into a bottom material stirrer for stirring, then adding the weighed cement into the bottom material stirrer for continuous stirring, and finally adding water at a constant speed for stirring.
6. The method of claim 4, wherein: the total time for mixing and stirring the surface layer is 120-200 seconds.
7. The method of claim 5, wherein: the total time of mixing and stirring the bottom layer is 60-90 seconds.
8. The method of claim 3, wherein: the water content in the fabric is 5-6 wt% of the total mass of the electric furnace roller slag aggregate, the yellow sand, the cement and the mineral powder, and the water content in the base material is 5-6 wt% of the total mass of the converter roller slag aggregate, the stone chips, the micro silicon powder and the cement.
9. The method of claim 3, wherein: the sand blasting is carried out by adopting a sand blasting machine, the blasting material for sand blasting is 20-40 meshes of steel slag sand, the sand blasting speed is 40-60m/s, and the sand blasting air pressure is 50-150 MPa.
10. The method of claim 3, wherein: the maintenance is steam maintenance, the maintenance humidity is 85% -95%, and the maintenance comprises: standing at room temperature for 2-3 hours, heating to 60-70 deg.C from room temperature, maintaining for 2-3 hours, heating to 80-90 deg.C, maintaining for 2-3 hours, and cooling to room temperature for 4-5 hours.
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Citations (3)
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| US20100075029A1 (en) * | 2008-08-18 | 2010-03-25 | Wilson Jr Jack H | Pavement life extension product and method |
| CN106478008A (en) * | 2016-09-21 | 2017-03-08 | 上海中冶环境工程科技有限公司 | Wear-resisting antiskid road surface product and preparation method thereof |
| CN109956707A (en) * | 2019-04-23 | 2019-07-02 | 浙江巍华新型建材有限公司 | A kind of very-high performance half-flexible pavement and its construction method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100075029A1 (en) * | 2008-08-18 | 2010-03-25 | Wilson Jr Jack H | Pavement life extension product and method |
| CN106478008A (en) * | 2016-09-21 | 2017-03-08 | 上海中冶环境工程科技有限公司 | Wear-resisting antiskid road surface product and preparation method thereof |
| CN109956707A (en) * | 2019-04-23 | 2019-07-02 | 浙江巍华新型建材有限公司 | A kind of very-high performance half-flexible pavement and its construction method |
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