CN111548076A - Steel slag asphalt concrete with good anti-rutting performance and preparation method thereof - Google Patents
Steel slag asphalt concrete with good anti-rutting performance and preparation method thereof Download PDFInfo
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- CN111548076A CN111548076A CN202010581626.1A CN202010581626A CN111548076A CN 111548076 A CN111548076 A CN 111548076A CN 202010581626 A CN202010581626 A CN 202010581626A CN 111548076 A CN111548076 A CN 111548076A
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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
Abstract
The invention provides steel slag asphalt concrete with good anti-rutting performance and a preparation method thereof. The steel slag asphalt concrete with good anti-rutting performance comprises the following raw materials: cement, coarse aggregate, fine aggregate, asphalt, filler, fiber stabilizer, and phase change material. This slag asphalt concrete, mainly by cement, coarse aggregate, fine aggregate, pitch, the filler, fiber stabilizer and phase change material constitute, wherein through adding fiber stabilizer, can promote the intercombination between each raw materials, and then improve bituminous mixture's viscidity, make it have good low temperature crack resistance, deuterogamy phase change material, cement and fine aggregate, play certain neutralization to the inside chemical composition of slag, avoid taking place great degree reaction with the inside chemical composition of slag, keep the original physical properties of each raw materials, make the stability of concrete obtain further promotion, and then promoted the anti rutting performance of concrete, and prolonged the life who makes the concrete.
Description
Technical Field
The invention relates to the field of asphalt concrete, in particular to steel slag asphalt concrete with good anti-rutting performance and a preparation method thereof.
Background
Asphalt concrete is commonly called asphalt concrete, mineral aggregate with a certain gradation composition, broken stone or crushed gravel, stone chips or sand, mineral powder and the like are manually selected and mixed with a certain proportion of road asphalt material under strictly controlled conditions to form a mixture, the mixture can be divided into two categories of petroleum asphalt and coal asphalt according to different used binders, or can be mixed by adopting or mixing with natural asphalt, and can be divided into a plurality of categories of broken stone, gravel, sand and slag according to different used aggregate varieties, and the broken stone is most commonly used.
The steel slag is a composite solid solution mainly composed of slag-forming materials, smelting reactants, impurities brought by an erosion-falling furnace body, a furnace repairing material and a metal furnace burden and slag-forming materials added for adjusting the properties of the steel slag, however, in order to reduce the pollution to the environment, the steel slag is applied to a road engineering cement concrete pavement, and then steel slag asphalt concrete is generated.
Therefore, it is necessary to provide a steel slag asphalt concrete with good anti-rutting performance and a preparation method thereof to solve the above technical problems.
Disclosure of Invention
The invention provides steel slag asphalt concrete with good anti-rutting performance and a preparation method thereof, and solves the problem that the existing steel slag asphalt concrete is not ideal enough in anti-rutting performance.
In order to solve the technical problems, the steel slag asphalt concrete with good anti-rutting performance provided by the invention comprises the following raw materials: cement, coarse aggregate, fine aggregate, asphalt, filler, fiber stabilizer, and phase change material;
wherein the raw materials are respectively as follows by mass ratio: 4-8 parts of cement, 60-80 parts of coarse aggregate, 15-30 parts of fine aggregate, 15-25 parts of asphalt, 5-10 parts of filler, 0.2-0.8 part of fiber stabilizer and 6-9 parts of phase change material.
Preferably, the coarse aggregate is composed of 65-75% of steel slag and limestone macadam, and the particle size of the coarse aggregate is controlled to be 2.15-13.5 mm.
Preferably, the fiber stabilizer is composed of mineral fibers, wood fibers and polyester fibers, wherein the amount of the mineral fibers, wood fibers and polyester fibers is 0.3-0.05%, 0.2-0.4% and 0.4-0.8% of the total mass of the coarse aggregate.
Preferably, the filler is limestone powder, and the asphalt is SBR modified asphalt.
The preparation method of the steel slag asphalt concrete with good anti-rutting performance comprises the following steps:
s1, steel slag treatment: the steel slag is placed into screening equipment for screening, and impurities such as metal substances, tiles and the like in the steel slag are screened out;
s2, preparing coarse aggregates: adding the steel slag and the limestone broken stones processed in the step S1 into a crushing device according to a proportion, crushing the steel slag and the limestone broken stones into particles with the particle size of 2.15-13.5mm by the crushing device, and transferring the mixture into a drying device for drying after the crushing is finished to finally obtain coarse aggregates;
s3, mixing preparation: introducing the coarse aggregate prepared in the step S2, the fine aggregate, the cement, the filler and the phase-change material into a mixing device, fully and uniformly mixing the raw materials, stirring to obtain a mixture, and taking out for later use;
s4, mixing the raw materials: firstly, introducing the asphalt into a container for heating, raising the temperature of the asphalt to 150-160 ℃, then adding the mixture prepared in the step S3 into the asphalt, slowly and uniformly stirring, then adding the fiber stabilizer, and continuously stirring and mixing until all the raw materials are uniformly mixed;
s5, molding: and (4) pouring out the mixture in the step S4, rolling and forming by using a wheel rolling method, primarily rolling twice, repeatedly rolling continuously in a direction-changing manner until the surface of the steel slag asphalt concrete is in a smooth state, and naturally cooling and forming.
Preferably, the steel slag raw material in the S1 is aged steel slag stacked for more than one year, so that the influence of excessive undegraded chemical substances in the steel slag on the quality of concrete is avoided.
Preferably, in the step S2, when drying, the corresponding drying time is adjusted according to the specific moisture degree of the steel slag and the crushed limestone, the drying temperature is 50-65 ℃, and it is required to ensure that the mixture of the steel slag and the crushed limestone is kept in a dry state.
Preferably, in the mixing process of the raw materials in S4, when the mixture is added to the asphalt, the mixture needs to be slowly added, so as to avoid asphalt waste caused by the outward splashing of the asphalt.
Preferably, be arranged in S2 to smash steel slag and limestone rubble, crushing equipment includes the organism, the inside of organism is provided with crushing structure, crushing structure is including rotating motor, first crushing roller and second crushing roller, rotate the one end of motor output shaft with equal fixedly connected with drive wheel on the second crushing roller, two the surface of drive wheel passes through belt transmission and connects.
Preferably, the spout has all been seted up to the both sides of organism inner wall, the inside of organism is provided with row material structure, it includes device case, slurcam and first screw thread bull stick to arrange the material structure, the inside of device case is provided with driving motor, driving motor output end fixedly connected with second screw thread bull stick, first screw thread bull stick with the surface of second screw thread bull stick has all been cup jointed and has been rotated the wheel, two it passes through belt transmission to rotate the wheel and connects, the both sides of slurcam respectively with first screw thread bull stick and the surface threaded connection of second screw thread bull stick.
Compared with the related technology, the steel slag asphalt concrete with good anti-rutting performance and the preparation method thereof provided by the invention have the following beneficial effects:
the invention provides a steel slag asphalt concrete with good anti-rutting performance and a preparation method thereof, the steel slag asphalt concrete mainly comprises cement, coarse aggregate, fine aggregate, asphalt, filler, fiber stabilizer and phase-change material, wherein the fiber stabilizer is added to promote the mutual combination of the raw materials so as to improve the viscosity of the asphalt mixture, so that the asphalt mixture has good low-temperature anti-cracking performance, the fiber stabilizer is formed by mixing three different fiber materials which are complementary to each other and improve the action capability, and the phase-change material, the cement and the fine aggregate are matched to play a certain neutralization role on the chemical components in the steel slag, so that the steel slag asphalt concrete can avoid a large degree of reaction with the chemical components in the steel slag, the original physical properties of the raw materials are kept, the stability of the concrete is further improved, and the anti-rutting performance of the concrete is further improved, and the service life of the concrete is prolonged.
Drawings
FIG. 1 is a schematic structural diagram of a second embodiment of the steel slag asphalt concrete with good anti-rutting performance and the preparation method thereof provided by the invention;
fig. 2 is a schematic view of the inside of the apparatus case shown in fig. 1.
Reference numbers in the figures: 1. the machine body comprises a crushing structure 2, a rotating motor 21, a first crushing roller 22, a second crushing roller 23, a driving wheel 24, a sliding groove 3, a discharging structure 4, a discharging structure 41, a device box 42, a pushing plate 43, a first threaded rotating rod 44, a driving motor 45, a second threaded rotating rod 46 and a rotating wheel.
Detailed Description
The present invention will be further described with reference to the following embodiments.
The steel slag asphalt concrete with good anti-rutting performance comprises the following raw materials: cement, coarse aggregate, fine aggregate, asphalt, filler, fiber stabilizer, and phase change material;
wherein the raw materials are respectively as follows by mass ratio: 4-8 parts of cement, 60-80 parts of coarse aggregate, 15-30 parts of fine aggregate, 15-25 parts of asphalt, 5-10 parts of filler, 0.2-0.8 part of fiber stabilizer and 6-9 parts of phase change material.
The coarse aggregate is composed of 65-75% of steel slag and limestone macadam, and the particle size of the coarse aggregate is controlled to be 2.15-13.5 mm.
The fiber stabilizer is composed of mineral fibers, wood fibers and polyester fibers, wherein the dosage of the mineral fibers, the wood fibers and the polyester fibers is 0.3-0.05%, 0.2-0.4% and 0.4-0.8% of the total mass of the coarse aggregate.
The filler is limestone powder, and the asphalt is SBR modified asphalt.
The preparation method of the steel slag asphalt concrete with good anti-rutting performance comprises the following steps:
s1, steel slag treatment: the steel slag is placed into screening equipment for screening, and impurities such as metal substances, tiles and the like in the steel slag are screened out;
s2, preparing coarse aggregates: adding the steel slag and the limestone broken stones processed in the step S1 into a crushing device according to a proportion, crushing the steel slag and the limestone broken stones into particles with the particle size of 2.15-13.5mm by the crushing device, and transferring the mixture into a drying device for drying after the crushing is finished to finally obtain coarse aggregates;
s3, mixing preparation: introducing the coarse aggregate prepared in the step S2, the fine aggregate, the cement, the filler and the phase-change material into a mixing device, fully and uniformly mixing the raw materials, stirring to obtain a mixture, and taking out for later use;
s4, mixing the raw materials: firstly, introducing the asphalt into a container for heating, raising the temperature of the asphalt to 150-160 ℃, then adding the mixture prepared in the step S3 into the asphalt, slowly and uniformly stirring, then adding the fiber stabilizer, and continuously stirring and mixing until all the raw materials are uniformly mixed;
s5, molding: and (4) pouring out the mixture in the step S4, rolling and forming by using a wheel rolling method, primarily rolling twice, repeatedly rolling continuously in a direction-changing manner until the surface of the steel slag asphalt concrete is in a smooth state, and naturally cooling and forming.
The steel slag raw material in the S1 is aged steel slag stacked for more than one year, so that the influence of excessive undegraded chemical substances in the steel slag on the quality of concrete is avoided.
And in the step S2, when drying, adjusting the corresponding drying time according to the specific humidity of the steel slag and the limestone crushed stone, wherein the drying temperature is 50-65 ℃, and the mixture of the steel slag and the limestone crushed stone needs to be kept in a dry state.
In the S4 raw material mixing process, when the mixture is added into the asphalt, the mixture needs to be slowly added, so that the asphalt waste caused by the outward splashing of the asphalt is avoided.
The steel slag asphalt concrete with good anti-rutting performance and the preparation method thereof provided by the invention have the following working principle:
the preparation method comprises the following steps: s1, steel slag treatment: the steel slag is placed into screening equipment for screening, impurities such as metal substances, tiles and the like in the steel slag are screened out, aged steel slag stacked for more than one year is selected as a steel slag raw material, and the influence of excessive undegraded chemical substances in the steel slag on the quality of concrete is avoided;
s2, preparing coarse aggregates: adding the steel slag and limestone broken stone treated in the step S1 into crushing equipment according to a proportion, crushing the steel slag and limestone broken stone into particles with the particle size of 2.15-13.5mm by the crushing equipment, transferring the mixture into drying equipment for drying after crushing is finished, and finally obtaining coarse aggregate, wherein during drying, the corresponding drying time needs to be adjusted according to the specific wetting degree of the steel slag and limestone broken stone, the drying temperature is 50-65 ℃, and the mixture of the steel slag and limestone broken stone needs to be kept in a dry state;
s3, mixing preparation: introducing the coarse aggregate prepared in the step S2, the fine aggregate, the cement, the filler and the phase-change material into a mixing device, fully and uniformly mixing the raw materials, stirring to obtain a mixture, and taking out for later use;
s4, mixing the raw materials: firstly, introducing asphalt into a container to be heated, so that the temperature of the asphalt rises to 150-160 ℃, then adding the mixture prepared in S3 into the asphalt, slowly and uniformly stirring, then adding a fiber stabilizer, continuously stirring and mixing, and when adding the mixture into the asphalt, slowly adding the mixture to avoid asphalt waste caused by the outward splashing of the asphalt until all raw materials are uniformly mixed;
s5, molding: and (4) pouring out the mixture in the step S4, rolling and forming by using a wheel rolling method, primarily rolling twice, repeatedly rolling continuously in a direction-changing manner until the surface of the steel slag asphalt concrete is in a smooth state, and naturally cooling and forming.
Compared with the related technology, the steel slag asphalt concrete with good anti-rutting performance and the preparation method thereof provided by the invention have the following beneficial effects:
this slag asphalt concrete, mainly by cement, coarse aggregate, fine aggregate, pitch, the filler, fiber stabilizer and phase change material constitute, wherein through adding fiber stabilizer, can promote the intercombination between each raw materials, and then improve bituminous mixture's viscidity, make it have good low temperature crack resistance, and fiber stabilizer adopts the fibrous material mixture of three kinds of differences to form, three kinds of materials are complementary, improve its functional capability, phase change material is deuterogamied, cement and fine aggregate, play certain neutralization effect to the inside chemical composition of slag, avoid taking place great degree reaction with the inside chemical composition of slag, keep the original physical properties of each raw materials, make the stability of concrete obtain further promotion, and then the anti-rutting performance of concrete has been promoted, and prolonged the life who makes the concrete.
Second embodiment
Based on the first embodiment of the present invention, a method for preparing steel slag asphalt concrete with good anti-rutting performance is provided, and the second embodiment of the present invention provides another method for preparing steel slag asphalt concrete with good anti-rutting performance, wherein the second embodiment does not hinder the independent implementation of the technical solution of the first embodiment.
Specifically, the difference of the preparation method of the other steel slag asphalt concrete with good anti-rutting performance provided by the invention is that:
the crushing equipment comprises a machine body 1, a crushing structure 2 is arranged inside the machine body 1, the crushing structure 2 comprises a rotating motor 21, a first crushing roller 22 and a second crushing roller 23, one end of an output shaft of the rotating motor 21 is fixedly connected with a driving wheel 24 on the second crushing roller 23, and the outer surfaces of the driving wheels 24 are connected through a belt in a transmission mode.
Crushing structure 2 mainly carries out shredding to slag and limestone rubble, is provided with the feed inlet on the right side of organism 1, puts the material into organism 1 through this feed inlet, rotates through rotating motor 21 during crushing for first crushing roller 22 can rotate simultaneously, and drives second crushing roller 23 simultaneously and rotate, rotates simultaneously through two crushing rollers, carries out shredding to slag and limestone rubble that get into organism 1 inside.
Spout 3 has all been seted up to the both sides of 1 inner wall of organism, the inside of organism 1 is provided with row material structure 4, it includes device case 41, slurcam 42 and first screw thread bull stick 43 to arrange material structure 4, the inside of device case 41 is provided with driving motor 44, driving motor 44 output end fixedly connected with second screw thread bull stick 45, first screw thread bull stick 43 with the surface of second screw thread bull stick 45 has all been cup jointed and has been rotated wheel 46, two it connects through belt transmission to rotate wheel 46, slurcam 42 both sides respectively with first screw thread bull stick 43 and the surface threaded connection of second screw thread bull stick 45.
The device box 41 is arranged at the left side of the machine body 1, the driving motor 44 is a forward and reverse rotating motor, one end of the first thread rotating rod 43 and one end of the second thread rotating rod 45 are respectively connected with one side of the inner surfaces of the two chutes 3 in a rotating way, the other side of the first thread rotating rod penetrates through the interior of the machine body 1 and extends to the interior of the device box 41, the pushing plate 42 is arranged at the bottom position of the inner wall of the machine body 1, the width of the pushing plate is matched with the width of the inner wall of the machine body 1 and can horizontally move in the machine body 1, a discharge hole is arranged at the bottom position of the right side of the machine body 1, after steel slag crushing and limestone crushing are completed, the driving motor 44 is started, so that the driving motor 44 can drive the second thread rotating rod 45 to rotate, meanwhile, the second thread rotating rod 45 can drive the rotating wheel 46 on the surface of the second thread rotating rod 45 to rotate, consequently under the rotation of two screw thread bull sticks, can drive slurcam 42 horizontal migration, and promote the disintegrating slag of piling up in 1 inner wall bottom of organism, discharge gate department is controlled until promoting the disintegrating slag, this moment through control driving motor 44 antiport, make slurcam 42 remove to opposite direction, move to original position until slurcam 42, through setting up this row material structure 4, when having smashed slag and limestone rubble, can discharge the disintegrating slag automatically, needn't artifical manual taking out the disintegrating slag of 1 inside of organism, the manpower has been saved greatly, it is more convenient to use, save trouble more, and can once only discharge the disintegrating slag, it is more efficient to arrange the material. The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The steel slag asphalt concrete with good anti-rutting performance is characterized by comprising the following raw materials: cement, coarse aggregate, fine aggregate, asphalt, filler, fiber stabilizer, and phase change material;
wherein the raw materials are respectively as follows by mass ratio: 4-8 parts of cement, 60-80 parts of coarse aggregate, 15-30 parts of fine aggregate, 15-25 parts of asphalt, 5-10 parts of filler, 0.2-0.8 part of fiber stabilizer and 6-9 parts of phase change material.
2. The steel slag asphalt concrete with good anti-rutting performance according to claim 1, wherein the coarse aggregate is composed of 65-75% of steel slag and limestone macadam, and the particle size of the coarse aggregate is controlled to be 2.15-13.5 mm.
3. The steel slag asphalt concrete with good anti-rutting performance according to claim 1, wherein the fiber stabilizer is composed of mineral fibers, wood fibers and polyester fibers, wherein the amount of the mineral fibers, wood fibers and polyester fibers is 0.3-0.05%, 0.2-0.4% and 0.4-0.8% of the total mass of the coarse aggregate.
4. The steel slag asphalt concrete with good anti-rutting performance according to claim 1, wherein the filler is limestone powder, and the asphalt is SBR modified asphalt.
5. The preparation method of the steel slag asphalt concrete with good anti-rutting performance is characterized by comprising the following steps:
s1, steel slag treatment: the steel slag is placed into screening equipment for screening, and impurities such as metal substances, tiles and the like in the steel slag are screened out;
s2, preparing coarse aggregates: adding the steel slag and the limestone broken stones processed in the step S1 into a crushing device according to a proportion, crushing the steel slag and the limestone broken stones into particles with the particle size of 2.15-13.5mm by the crushing device, and transferring the mixture into a drying device for drying after the crushing is finished to finally obtain coarse aggregates;
s3, mixing preparation: introducing the coarse aggregate prepared in the step S2, the fine aggregate, the cement, the filler and the phase-change material into a mixing device, fully and uniformly mixing the raw materials, stirring to obtain a mixture, and taking out for later use;
s4, mixing the raw materials: firstly, introducing the asphalt into a container for heating, raising the temperature of the asphalt to 150-160 ℃, then adding the mixture prepared in the step S3 into the asphalt, slowly and uniformly stirring, then adding the fiber stabilizer, and continuously stirring and mixing until all the raw materials are uniformly mixed;
s5, molding: and (4) pouring out the mixture in the step S4, rolling and forming by using a wheel rolling method, primarily rolling twice, repeatedly rolling continuously in a direction-changing manner until the surface of the steel slag asphalt concrete is in a smooth state, and naturally cooling and forming.
6. The method for preparing the steel slag asphalt concrete with good anti-rutting performance according to the claim 5, wherein the steel slag raw material in the S1 is aged steel slag stacked for more than one year, so that the influence of excessive undegraded chemical substances in the steel slag on the quality of the concrete is avoided.
7. The method for preparing the steel slag asphalt concrete with good anti-rutting performance according to the claim 5, wherein in the step S2, the corresponding drying time is adjusted according to the specific wetting degree of the steel slag and the limestone crushed stone, the drying temperature is 50-65 ℃, and the mixture of the steel slag and the limestone crushed stone is required to be kept in a dry state.
8. The method for preparing the steel slag asphalt concrete with good anti-rutting performance according to the claim 5, wherein in the step of mixing the raw materials in the step S4, the raw materials need to be slowly added when the mixture is added into the asphalt, so that the asphalt is prevented from being wasted due to the fact that the asphalt is splashed outwards.
9. The preparation method of the steel slag asphalt concrete with good anti-rutting performance according to claim 5, which is used for crushing steel slag and limestone broken stones in S2, wherein the crushing device comprises a machine body, a crushing structure is arranged inside the machine body, the crushing structure comprises a rotating motor, a first crushing roller and a second crushing roller, one end of an output shaft of the rotating motor and the second crushing roller are fixedly connected with transmission wheels, and the outer surfaces of the two transmission wheels are in transmission connection through a belt.
10. The method for preparing steel slag asphalt concrete with good anti-rutting performance according to claim 9, wherein sliding grooves are formed in both sides of the inner wall of the machine body, a discharging structure is arranged inside the machine body, the discharging structure comprises a device box, a pushing plate and a first threaded rotating rod, a driving motor is arranged inside the device box, a second threaded rotating rod is fixedly connected to the output end of the driving motor, rotating wheels are sleeved on the outer surfaces of the first threaded rotating rod and the second threaded rotating rod, the two rotating wheels are connected through a belt in a transmission manner, and both sides of the pushing plate are respectively in threaded connection with the outer surfaces of the first threaded rotating rod and the second threaded rotating rod.
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| CN113024160A (en) * | 2021-01-19 | 2021-06-25 | 张延年 | Temperature-control high-performance solid waste asphalt concrete |
| CN113277778A (en) * | 2021-06-25 | 2021-08-20 | 上海繁荣道路建设工程有限公司 | Asphalt concrete and preparation method thereof |
| CN113620654A (en) * | 2021-09-06 | 2021-11-09 | 昆明理工大学 | Gravel asphalt mixture and preparation method thereof |
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| CN113620654B (en) * | 2021-09-06 | 2022-09-13 | 昆明理工大学 | Gravel asphalt mixture and preparation method thereof |
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Application publication date: 20200818 |