CN112209684A - Road base material and preparation method thereof - Google Patents
Road base material and preparation method thereof Download PDFInfo
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- CN112209684A CN112209684A CN202011124285.1A CN202011124285A CN112209684A CN 112209684 A CN112209684 A CN 112209684A CN 202011124285 A CN202011124285 A CN 202011124285A CN 112209684 A CN112209684 A CN 112209684A
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- steel slag
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
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Abstract
The invention relates to a road matrix and discloses a road bed material and a preparation method thereof. The road base material comprises the following raw material components, by weight, 10 parts of broken stone fine aggregate is taken as a reference, the content of steel slag coarse aggregate is 20-30 parts, the content of cement is 1.2-2.5 parts, and the content of water is 2-3.5 parts. The method for preparing the road base material comprises the following steps: mixing the steel slag coarse aggregate, the broken stone fine aggregate, the cement and the water to obtain a mixture, and vibrating and stirring the mixture. The road base material provided by the invention has the advantages of high compactness and low heavy metal precipitation rate, and realizes resource utilization of solid wastes.
Description
Technical Field
The invention relates to a road matrix, in particular to a road bed material and a preparation method thereof.
Background
The steel slag is a byproduct generated in the steel-making process, belongs to industrial waste, and is in a non-metal solid state, so that the expression form of the steel slag is represented. The steel slag is used in the fields of road construction, building materials, agricultural production and the like, can effectively realize the resource utilization of industrial solid wastes, and can reduce the exploitation of sand and stone so as to reduce the water and soil loss of some mountainous regions.
Because the steel slag is essentially waste slag in industrial production, different purification processes are carried out in a steel mill in the steel making process, and the produced waste slag can carry partial environmental pollution components, the steel slag has a certain content of heavy metals when leaving a factory in the process of industrial production containing the heavy metals, and when the steel slag is applied to a road base layer, the important significance is realized on how to reduce or avoid the precipitation of the heavy metals in the steel slag.
Disclosure of Invention
The invention aims to solve the problem of heavy metal precipitation in steel slag in the prior art, and provides a road base layer material and a preparation method thereof.
In order to achieve the above object, a first aspect of the present invention provides a material for a road bed comprising, based on 10 parts by weight of crushed stone fine aggregates, 20 to 30 parts by weight of steel slag coarse aggregates, 1.2 to 2.5 parts by weight of cement, and 2 to 3.5 parts by weight of water.
Preferably, the steel slag coarse aggregate comprises first steel slag, second steel slag and third steel slag, the particle size of the first steel slag is 19-26.5mm, the particle size of the second steel slag is 9.5-19mm, the particle size of the third steel slag is 4.75-9.5mm, and the mass ratio of the first steel slag, the second steel slag and the third steel slag is 1-1.2: 1-1.5: 1.
preferably, the crushed stone fine aggregate comprises a first crushed stone, a second crushed stone, a third crushed stone and a fourth crushed stone, the particle size of the first crushed stone is 2.36-4.75mm, the particle size of the second crushed stone is 0.6-2.36mm, the particle size of the third crushed stone is 0.075-0.6mm, the particle size of the fourth crushed stone is less than 0.075mm, and the mass ratio of the first crushed stone, the second crushed stone, the third crushed stone and the fourth crushed stone is 3-4: 6-8: 5-7: 1.
preferably, the cement is portland cement.
In a second aspect, the present invention provides a method of preparing a roadbed material, comprising the steps of: mixing the steel slag coarse aggregate, the broken stone fine aggregate, the cement and the water to obtain a mixture, and vibrating and stirring the mixture; wherein, on the basis of 10 weight parts of crushed stone fine aggregate, the using amount of the steel slag coarse aggregate is 20 to 30 weight parts, the using amount of the cement is 1.2 to 2.5 weight parts, and the using amount of the water is 2 to 3.5 weight parts.
Preferably, the steel slag coarse aggregate comprises first steel slag, second steel slag and third steel slag, the particle size of the first steel slag is 19-26.5mm, the particle size of the second steel slag is 9.5-19mm, the particle size of the third steel slag is 4.75-9.5mm, and the mass ratio of the first steel slag, the second steel slag and the third steel slag is 1-1.2: 1-1.5: 1;
preferably, the crushed stone fine aggregate comprises a first crushed stone, a second crushed stone, a third crushed stone and a fourth crushed stone, the particle size of the first crushed stone is 2.36-4.75mm, the particle size of the second crushed stone is 0.6-2.36mm, the particle size of the third crushed stone is 0.075-0.6mm, the particle size of the fourth crushed stone is less than 0.075mm, and the mass ratio of the first crushed stone, the second crushed stone, the third crushed stone and the fourth crushed stone is 3-4: 6-8: 5-7: 1;
preferably, the cement is portland cement.
Preferably, the process of mixing the steel slag coarse aggregate, the crushed stone fine aggregate, the cement and the water comprises: mixing the steel slag coarse aggregate, the broken stone fine aggregate and the water, stirring, and then carrying out blank filling to obtain a mixed blank material, and mixing the mixed blank material and cement to obtain the mixture.
Preferably, the material sealing process at least meets the following conditions: the temperature is 20-40 deg.C, and the time is 10-15 h.
Preferably, the process of the vibration stirring at least satisfies the following conditions: the vibration frequency is 20-30Hz, the amplitude is 0.8-1.2mm, the stirring speed is 50-60rpm, and the time is 35-45 s.
Preferably, the method further comprises the step of forming the material obtained by the vibration stirring, wherein the interval time between the forming and the vibration stirring is less than 1 h.
Through the technical scheme, the invention has the beneficial effects that:
1. according to the road base material provided by the invention, the coarse and fine particles of the steel slag coarse aggregate and the broken stone fine aggregate are arranged more closely by utilizing the gelation effect of cement, the broken stone fine particles in the mixture are condensed, the loss rate of the broken stone fine particles can be reduced, and meanwhile, the broken stone fine particles and the cement particles can be fully filled between coarse frameworks formed by the steel slag coarse aggregate, so that the probability of large gaps of the road base material is greatly reduced; the wrapping effect of the cement can not only reduce the exposed area of the steel slag coarse aggregate, but also carry out hydration reaction with water contacted with a road base material, thereby preventing heavy metals in the steel slag coarse aggregate from being separated out and dissolved in water;
2. according to the preparation method of the road base material, provided by the invention, not only are cement particles uniformly dispersed through vibration and stirring, but also the broken stone fine aggregate and the cement can be fully filled in the inner pores of the steel slag coarse aggregate, the separation path of heavy metals in the steel slag coarse aggregate is prevented, and the separation rate of the heavy metals in the road base material is reduced.
Detailed Description
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
In a first aspect, the invention provides a road bed material, which comprises the following raw material components, based on 10 parts by weight of crushed stone fine aggregate, 20-30 parts by weight of steel slag coarse aggregate, 1.2-2.5 parts by weight of cement and 2-3.5 parts by weight of water.
In the invention, the steel slag coarse aggregate refers to steel slag particles with the particle size of more than 4.75mm, the broken stone fine aggregate refers to broken stone particles with the particle size of less than 4.75mm, and the steel slag coarse aggregate and the broken stone fine aggregate are respectively obtained by screening treatment. Because the heavy metal precipitation rate of the steel slag coarse aggregate is lower than that of the steel slag fine aggregate, the road base material provided by the invention reduces the precipitation of heavy metals from the aspects of raw material components and proportion.
According to the invention, the steel slag coarse aggregate comprises a first steel slag, a second steel slag and a third steel slag, wherein the grain size of the first steel slag is 19-26.5mm, the grain size of the second steel slag is 9.5-19mm, the grain size of the third steel slag is 4.75-9.5mm, and the mass ratio of the first steel slag, the second steel slag and the third steel slag is 1-1.2: 1-1.5: 1. the first steel slag, the second steel slag and the third steel slag are steel slag coarse aggregates with different specifications respectively, and the steel slag is classified by screening treatment and then mixed according to the mass ratio for later use. The inventors have found that in this preferred embodiment, the compactness of the arrangement between the raw material components of the road base material is more facilitated.
According to the invention, the crushed stone fine aggregate comprises a first crushed stone, a second crushed stone, a third crushed stone and a fourth crushed stone, the particle size of the first crushed stone is 2.36-4.75mm, the particle size of the second crushed stone is 0.6-2.36mm, the particle size of the third crushed stone is 0.075-0.6mm, the particle size of the fourth crushed stone is less than 0.075mm, and the mass ratio of the first crushed stone, the second crushed stone, the third crushed stone and the fourth crushed stone is 3-4: 6-8: 5-7: 1. the first gravel, the second gravel, the third gravel and the fourth gravel are gravel fine aggregates with different specifications respectively, and the gravel is classified through screening treatment and then mixed for later use according to the mass ratio. The inventors have found that in this preferred embodiment, penetration of the fine particles of crushed stone into the internal pores of the steel slag coarse aggregate is more facilitated to reduce the precipitation path of heavy metals in the steel slag.
According to the invention, the cement may be a conventional type of cement, illustratively portland cement.
In a second aspect, the present invention provides a method of preparing a roadbed material, comprising the steps of: mixing the steel slag coarse aggregate, the broken stone fine aggregate, the cement and the water to obtain a mixture, and vibrating and stirring the mixture; wherein, on the basis of 10 weight parts of crushed stone fine aggregate, the using amount of the steel slag coarse aggregate is 20 to 30 weight parts, the using amount of the cement is 1.2 to 2.5 weight parts, and the using amount of the water is 2 to 3.5 weight parts.
In the invention, the raw material components of the road base material are mixed and then subjected to vibration stirring treatment, so that cement particles can be uniformly dispersed, and the phenomenon of cement agglomeration can not occur, thereby facilitating the penetration of the cement particles into internal micropores of the steel slag coarse aggregate to reduce the precipitation path of the cement particles; the broken stone fine aggregate and the cement can be fully filled in the inner pores of the steel slag coarse aggregate, the separation path of heavy metals in the steel slag coarse aggregate is prevented, and the separation rate of the heavy metals in the road base material is reduced.
According to the invention, the steel slag coarse aggregate comprises a first steel slag, a second steel slag and a third steel slag, wherein the grain size of the first steel slag is 19-26.5mm, the grain size of the second steel slag is 9.5-19mm, the grain size of the third steel slag is 4.75-9.5mm, and the mass ratio of the first steel slag, the second steel slag and the third steel slag is 1-1.2: 1-1.5: 1.
according to the invention, the crushed stone fine aggregate comprises a first crushed stone, a second crushed stone, a third crushed stone and a fourth crushed stone, the particle size of the first crushed stone is 2.36-4.75mm, the particle size of the second crushed stone is 0.6-2.36mm, the particle size of the third crushed stone is 0.075-0.6mm, the particle size of the fourth crushed stone is less than 0.075mm, and the mass ratio of the first crushed stone, the second crushed stone, the third crushed stone and the fourth crushed stone is 3-4: 6-8: 5-7: 1.
according to the invention, the cement is portland cement.
According to the present invention, the process of mixing the steel slag coarse aggregate, the crushed stone fine aggregate, the cement and the water comprises: and mixing the steel slag coarse aggregate, the broken stone and the water, stirring, and then carrying out blank filling to obtain a mixed blank material, and mixing the mixed blank material and cement to obtain the mixture. The inventors have found that in this preferred embodiment, water which is beneficial for the road base material is uniformly distributed in the other raw materials, thereby enabling the compaction to be enhanced after use in road construction.
In the present invention, the conditions for the stuffy materials are not particularly limited, and water may be uniformly dispersed in each raw material. The general material sealing conditions comprise temperature, time and the like, and preferably, the material sealing process at least meets the following conditions: the temperature is 20-40 deg.C, specifically 20 deg.C, 25 deg.C, 30 deg.C, 35 deg.C, 40 deg.C, or any value between the above two values; the time is 10-15h, specifically 10h, 11h, 12h, 13h, 14h, 15h, or any value between the two values.
According to the invention, the process of vibratory stirring at least meets the following conditions: the vibration frequency is 20-30Hz, specifically 20Hz, 22Hz, 24Hz, 26Hz, 28Hz, 30Hz, or any value between the two values; the amplitude is 0.8-1.2mm, specifically 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, or any value therebetween; the stirring speed is 50-60rpm, specifically 50rpm, 52rpm, 54rpm, 56rpm, 58rpm, 60rpm, or any value between the two values; the time is 35-45s, and specifically, may be 35s, 37s, 39s, 41s, 43s, 45s, or any value between the two values. The inventors have found that in this preferred embodiment, it is advantageous for the crushed stone fine aggregate and cement particles to fill the pores of the steel slag coarse aggregate sufficiently, so that the road base material has better compactness and is more advantageous for preventing the heavy metal from separating out.
According to the invention, the method also comprises the step of forming the material obtained by the vibration stirring, wherein the interval time between the forming and the vibration stirring is less than 1 h. The forming adopts compaction forming, and specifically, the forming operation is carried out within 1h after the vibration stirring is finished.
The present invention will be described in detail below by way of examples.
In the following examples, Cr6+And the content of V are respectively measured by a method in the determination method of leachable heavy metals in cement mortar (GB/T30810-2014); the steel slag coarse aggregate is from a Shenglong steelworks in the city of urban harbor in Guangxi province, and is obtained by screening to obtain first steel slag with the grain size of 19-26.5mm, second steel slag with the grain size of 9.5-19mm and third steel slag with the grain size of 4.75-9.5 mm; the crushed stone fine aggregate is limestone crushed stone from a certain mining area in Weinan, Shanxi province, and is subjected to screening treatment to obtain first crushed stone with the grain diameter of 2.36-4.75mm, second crushed stone with the grain diameter of 0.6-2.36mm, third crushed stone with the grain diameter of 0.075-0.6mm and fourth crushed stone with the grain diameter of less than 0.075 mm.
In the following examples, room temperature means 25. + -. 5 ℃ unless otherwise specified.
Example 1
(1) Mixing 2300g of first steel slag, 2900g of second steel slag, 2100g of third steel slag, 500g of first broken stone, 1050g of second broken stone, 1000g of third broken stone and 150g of fourth broken stone with 738g of water, stirring, and then carrying out blank curing at room temperature for 12 hours to obtain a mixed blank material;
(2) and (2) mixing the mixed blank material obtained in the step (1) with 500g of portland cement to obtain a mixture, carrying out vibration stirring on the mixture, wherein the vibration frequency of the vibration stirring is 25Hz, the amplitude is 1mm, the stirring speed is 55rpm, the time is 40s, and forming within 1h after the vibration stirring is finished.
Example 2
(1) 974g of first steel slag, 1216g of second steel slag, 810g of third steel slag, 200g of first broken stone, 400g of second broken stone, 350g of third broken stone and 50g of fourth broken stone are mixed with 350g of water, stirred and subjected to blank filling for 15 hours at room temperature to obtain a mixed blank material;
(2) and (2) mixing the mixed blank material obtained in the step (1) with 250g of portland cement to obtain a mixture, vibrating and stirring the mixture, wherein the vibration frequency of the vibrating and stirring is 30Hz, the amplitude is 1.2mm, the stirring speed is 60rpm, the time is 45s, and forming is carried out within 1h after the vibrating and stirring are finished.
Example 3
(1) Mixing 666g of first steel slag, 667g of second steel slag, 667g of third steel slag, 200g of first crushed stone, 400g of second crushed stone, 333g of third crushed stone and 67g of fourth crushed stone with 200g of water, stirring, and then carrying out blank curing at room temperature for 10 hours to obtain a mixed blank material;
(2) and (2) mixing the mixed blank material obtained in the step (1) with 120g of portland cement to obtain a mixture, vibrating and stirring the mixture, wherein the vibration frequency of the vibrating and stirring is 20Hz, the amplitude is 0.8mm, the stirring speed is 50rpm, the time is 30s, and forming is carried out within 1h after the vibrating and stirring are finished.
Example 4
A road base material was prepared by following the procedure of example 3 except that the material-stuffiness time in the step (1) was 5 hours.
Example 5
A road base material was produced in the same manner as in example 3, except that the vibrational frequency of the vibrational stirring in step (2) was 50Hz, the amplitude was 3mm, the stirring rotation speed was 50rpm, and the time was 30 s.
Example 6
A road base material was prepared in accordance with the method of example 3, except that the first steel slag was used in an amount of 400g, the second steel slag was used in an amount of 600g, and the third steel slag was used in an amount of 1000g in step (1).
Example 7
A road base material was prepared in accordance with the method of example 3, except that the first steel slag was used in an amount of 1000g, the second steel slag was used in an amount of 800g, and the third steel slag was used in an amount of 200g in step (1).
Example 8
A road base material was prepared by the method of example 3 except that the amount of the first crushed stone was 250g, the amount of the second crushed stone was 250g, the amount of the third crushed stone was 250g, and the amount of the fourth crushed stone was 250g in step (1).
Comparative example 1
A road base material was prepared by following the procedure of example 3 except that the amount of cement used in step (2) was 1000 g.
Comparative example 2
A road base material was prepared by following the method of example 3 except that 200g of the first crushed stone, 400g of the second crushed stone, 333g of the third crushed stone, and 67g of the fourth crushed stone were replaced with 200g of the first crushed stone and 200g of the second crushed stone in step (1).
Comparative example 3
(1) Mixing 666g of first steel slag, 667g of second steel slag, 667g of third steel slag, 200g of first crushed stone, 400g of second crushed stone, 333g of third crushed stone and 67g of fourth crushed stone with 200g of water, stirring, and then carrying out blank curing at room temperature for 10 hours to obtain a mixed blank material;
(2) and (2) mixing the mixed blank material obtained in the step (1) with 120g of Portland cement, uniformly stirring, and forming within 1 hour.
Comparative example 4
And mixing 666g of first steel slag, 667g of second steel slag, 667g of third steel slag, 200g of first crushed stone, 400g of second crushed stone, 333g of third crushed stone and 67g of fourth crushed stone with 200g of water, stirring, sealing the mixture for 10 hours at room temperature, and forming.
Test example
Respectively taking 2kg of the road base material prepared in the examples 1-8 and the comparative examples 1-4, forming to obtain test pieces, putting each test piece into a plastic barrel, adding an equal amount of water (3000mL) to enable the test piece to be completely immersed in the water for 24h, sampling the immersion liquid of each test piece by using a 30mL plastic bottle every 4h in the immersion process, and determining chromium (Cr) in the immersion liquid sample6+) And vanadium (V) content, the results are shown in tables 1 and 2.
TABLE 1 Cr in soak samples6+The leaching concentration (unit: mg/L)
| Numbering | 4h | 8h | 12h | 16h | 20h | 24h |
| Example 1 | 0.158 | 0.254 | 0.247 | 0.262 | 0.252 | 0.265 |
| Example 2 | 0.226 | 0.195 | 0.237 | 0.208 | 0.215 | 0.210 |
| Example 3 | 0.288 | 0.263 | 0.305 | 0.273 | 0.268 | 0.280 |
| Example 4 | 0.293 | 0.277 | 0.305 | 0.288 | 0.279 | 0.289 |
| Example 5 | 0.295 | 0.286 | 0.298 | 0.293 | 0.285 | 0.288 |
| Example 6 | 0.289 | 0.278 | 0.298 | 0.283 | 0.278 | 0.285 |
| Example 7 | 0.288 | 0.269 | 0.297 | 0.276 | 0.273 | 0.283 |
| Example 8 | 0.291 | 0.283 | 0.301 | 0.274 | 0.271 | 0.281 |
| Comparative example 1 | 0.305 | 0.316 | 0.323 | 0.314 | 0.312 | 0.320 |
| Comparative example 2 | 0.303 | 0.313 | 0.320 | 0.311 | 0.308 | 0.316 |
| Comparative example 3 | 0.308 | 0.319 | 0.326 | 0.318 | 0.317 | 0.325 |
| Comparative example 4 | 0.600 | 0.933 | 1.178 | 1.189 | 1.189 | 1.167 |
TABLE 2 Leaching concentration of vanadium (V) in the soak solution samples (unit: mg/L)
| Numbering | 4h | 8h | 12h | 16h | 20h | 24h |
| Example 1 | 0.155 | 0.181 | 0.160 | 0.193 | 0.182 | 0.163 |
| Example 2 | 0.107 | 0.118 | 0.107 | 0.099 | 0.100 | 0.096 |
| Example 3 | 0.182 | 0.183 | 0.218 | 0.177 | 0.215 | 0.189 |
| Example 4 | 0.195 | 0.201 | 0.230 | 0.207 | 0.235 | 0.218 |
| Example 5 | 0.194 | 0.202 | 0.235 | 0.208 | 0.236 | 0.221 |
| Example 6 | 0.189 | 0.201 | 0.219 | 0.188 | 0.229 | 0.206 |
| Example 7 | 0.186 | 0.191 | 0.224 | 0.189 | 0.227 | 0.203 |
| Example 8 | 0.191 | 0.194 | 0.227 | 0.192 | 0.231 | 0.213 |
| Comparative example 1 | 0.211 | 0.225 | 0.244 | 0.228 | 0.243 | 0.232 |
| Comparative example 2 | 0.209 | 0.222 | 0.241 | 0.225 | 0.240 | 0.231 |
| Comparative example 3 | 0.215 | 0.228 | 0.247 | 0.231 | 0.249 | 0.238 |
| Comparative example 4 | 0.485 | 0.810 | 1.230 | 1.252 | 1.155 | 1.148 |
As can be seen from the results in Table 1Examples 1-8 road base materials were prepared using the raw material compositions and preparation methods of the present invention, and chromium (Cr) in the soak solution samples was compared to comparative examples 1-46+) And the content of vanadium (V) is obviously reduced, and the effect of reducing the heavy metal precipitation rate is obviously better. As can be seen from the example 3 and the comparative example 3, the crushed stone fine aggregate and the cement can be fully filled in the inner pores of the steel slag coarse aggregate by the vibration stirring, so that the separation path of the heavy metals in the steel slag coarse aggregate is further prevented, and the separation of the heavy metals in the road base material is reduced.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (10)
1. The road base material is characterized by comprising the following raw material components, by taking 10 parts by weight of broken stone fine aggregate as a reference, 20-30 parts by weight of steel slag coarse aggregate, 1.2-2.5 parts by weight of cement and 2-3.5 parts by weight of water.
2. The road bed material of claim 1, wherein the steel slag coarse aggregate comprises a first steel slag, a second steel slag and a third steel slag, the particle size of the first steel slag is 19-26.5mm, the particle size of the second steel slag is 9.5-19mm, the particle size of the third steel slag is 4.75-9.5mm, and the mass ratio of the first steel slag, the second steel slag and the third steel slag is 1-1.2: 1-1.5: 1.
3. the road base material according to claim 1 or 2, characterized in that the crushed stone fine aggregate comprises a first crushed stone, a second crushed stone, a third crushed stone and a fourth crushed stone, the first crushed stone has a particle size of 2.36-4.75mm, the second crushed stone has a particle size of 0.6-2.36mm, the third crushed stone has a particle size of 0.075-0.6mm, the fourth crushed stone has a particle size of less than 0.075mm, and the first crushed stone, the second crushed stone, the third crushed stone and the fourth crushed stone are in a mass ratio of 3-4: 6-8: 5-7: 1.
4. the road base material of claim 1 or 2, wherein the cement is portland cement.
5. A method of making a roadbed material comprising the steps of: mixing the steel slag coarse aggregate, the broken stone fine aggregate, the cement and the water to obtain a mixture, and vibrating and stirring the mixture;
wherein, on the basis of 10 weight parts of crushed stone fine aggregate, the using amount of the steel slag coarse aggregate is 20 to 30 weight parts, the using amount of the cement is 1.2 to 2.5 weight parts, and the using amount of the water is 2 to 3.5 weight parts.
6. The method as claimed in claim 5, wherein the steel slag coarse aggregate comprises a first steel slag, a second steel slag and a third steel slag, the particle size of the first steel slag is 19-26.5mm, the particle size of the second steel slag is 9.5-19mm, the particle size of the third steel slag is 4.75-9.5mm, and the mass ratio of the first steel slag, the second steel slag and the third steel slag is 1-1.2: 1-1.5: 1;
preferably, the crushed stone fine aggregate comprises a first crushed stone, a second crushed stone, a third crushed stone and a fourth crushed stone, the particle size of the first crushed stone is 2.36-4.75mm, the particle size of the second crushed stone is 0.6-2.36mm, the particle size of the third crushed stone is 0.075-0.6mm, the particle size of the fourth crushed stone is less than 0.075mm, and the mass ratio of the first crushed stone, the second crushed stone, the third crushed stone and the fourth crushed stone is 3-4: 6-8: 5-7: 1;
preferably, the cement is portland cement.
7. The method as claimed in claim 5, wherein the mixing of the steel slag coarse aggregate, the crushed stone fine aggregate, the cement and the water comprises: mixing the steel slag coarse aggregate, the broken stone fine aggregate and the water, stirring, and then carrying out blank filling to obtain a mixed blank material, and mixing the mixed blank material and cement to obtain the mixture.
8. The method according to claim 7, wherein the material smoldering process at least meets the following conditions: the temperature is 20-40 deg.C, and the time is 10-15 h.
9. The method according to claim 5, wherein the vibrating agitation is performed under at least the following conditions: the vibration frequency is 20-30Hz, the amplitude is 0.8-1.2mm, the stirring speed is 50-60rpm, and the time is 35-45 s.
10. The method according to any one of claims 5 to 9, further comprising shaping the material obtained by the vibratory agitation, wherein the time between the shaping and the vibratory agitation is less than 1 hour.
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| CN202011124285.1A CN112209684B (en) | 2020-10-20 | 2020-10-20 | Road base material and preparation method thereof |
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| CN202011124285.1A CN112209684B (en) | 2020-10-20 | 2020-10-20 | Road base material and preparation method thereof |
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| CN112209684B CN112209684B (en) | 2022-07-22 |
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| CN202011124285.1A Active CN112209684B (en) | 2020-10-20 | 2020-10-20 | Road base material and preparation method thereof |
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| CN114907062A (en) * | 2022-05-31 | 2022-08-16 | 丰城市复建高科有限公司 | Highway water stabilizing material and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114907062A (en) * | 2022-05-31 | 2022-08-16 | 丰城市复建高科有限公司 | Highway water stabilizing material and preparation method thereof |
| CN114907062B (en) * | 2022-05-31 | 2022-12-09 | 丰城市复建高科有限公司 | Highway water stabilizing material and preparation method thereof |
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| CN112209684B (en) | 2022-07-22 |
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