Water-stabilized base construction method based on concrete road regeneration
By vacuuming during the crushing process of concrete roads, the cumbersome problems of mud removal and drying process after crushing are solved, efficient and environmentally friendly water-stabilizing base construction is achieved, and construction costs are reduced.
Patent Information
- Application Number
- CN202510676822.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-26
- Publication Date
- 2025-07-29
AI Technical Summary
The crushed concrete desilt and drying process is cumbersome, which affects construction efficiency and increases costs.
Vacuum treatment is carried out during the crushing process of concrete roads to reduce dust and mud content, and reduce subsequent mud removal and drying processes.
Improve construction efficiency, reduce construction costs, and form an environmentally friendly water-stable grassroots.
Smart Images
Figure CN120384446A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of road and bridge construction, for example, it relates to a construction method for a water-stable base layer based on the regeneration of concrete roads. Background Art
[0002] In the field of road and bridge engineering, upgrading an old concrete pavement to an asphalt pavement is a common upgrade solution. Traditional processes usually adopt the following two methods: directly paving an asphalt layer: directly paving an asphalt surface layer on the old concrete slab. However, due to stress concentration at the joints of the old slab and differences in temperature shrinkage deformation, reflection cracks are likely to occur (the incidence rate is as high as over 70%), and insufficient interlayer bonding is likely to cause slip failure. Milling and then constructing a new water-stable layer: After milling the old concrete slab, a cement-stabilized macadam layer (water-stable layer) is laid using natural crushed stone aggregates. Although this method can avoid reflection cracks, it requires a large amount of natural stone (about 12,000 tons per kilometer), resulting in waste of resources and increased carbon emissions.
[0003] In the related art, there is an attempt to use the crushed old concrete road as recycled aggregate for the water-stable layer. After crushing the old concrete road, it is screened, and then other auxiliary materials are added to form aggregate, and the aggregate is laid to form a water-stable layer. During the crushing process of the old concrete, water needs to be sprayed for dust removal and temperature reduction. The mud content and water content of the crushed old concrete need to be considered. Therefore, it is necessary to remove mud and dry the crushed concrete to ensure that both the mud content and water content of the crushed old concrete are within the target range.
[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:
[0005] The processes of mud removal and drying of the crushed concrete are cumbersome, affecting the construction efficiency and increasing the construction cost.
[0006] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of this application. Therefore, it may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention
[0007] To have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a general review, nor is it intended to identify key / important constituent elements or delineate the protection scope of these embodiments. Instead, it serves as a preface to the subsequent detailed description.
[0008] An embodiment of the present disclosure provides a construction method for a cement stabilized base layer based on the regeneration of concrete roads, which can use the crushed concrete roads as the materials for the cement stabilized layer, and perform dust suction treatment during the crushing stage of the materials. The dust suction treatment can not only remove dust from the crushed materials, reduce the dust in the construction environment, but also reduce the mud content in the materials, reduce the subsequent mud removal and drying processes, improve the construction efficiency, and reduce the construction cost.
[0009] In some embodiments, the construction method for a cement stabilized base layer based on the regeneration of concrete roads includes:
[0010] Crush the concrete road to form granular materials, and perform dust suction treatment during the crushing process;
[0011] Screen the crushed materials and control the proportion of the materials within each target particle size range;
[0012] Mix the screened materials and then spread them on the roadbed, and perform gradient compaction.
[0013] Optionally, when there is a metal skeleton in the concrete road, before screening the crushed materials and controlling the proportion of the materials within each target particle size range, it further includes: removing the metal skeleton from the crushed materials so that the metal content in the crushed materials is lower than the target value.
[0014] Optionally, when the mud content in the crushed materials is greater than the target mud content, while screening the crushed materials and controlling the proportion of the materials within each target particle size range, it further includes: performing dust suction treatment during the screening process.
[0015] Optionally, performing dust suction treatment during the screening process includes: determining the target duration of dust suction according to the range of the mud content in the crushed materials, and performing dust suction treatment on the materials for the target duration.
[0016] Optionally, when the mud content in the crushed materials is less than or equal to the target mud content, while screening the crushed materials and controlling the proportion of the materials within each target particle size range, it further includes: using an atomizing spray system to suppress dust and wet the materials at the same time to increase the water content of the materials.
[0017] Optionally, after screening the crushed materials and controlling the proportion of the materials within each target particle size range, it further includes: re-crushing the materials with a particle size greater than the target particle size threshold.
[0018] Optionally, crushing the concrete road to form granular materials includes: crushing the concrete road using a three-stage crushing process to form granular materials.
[0019] Optionally, a three-stage crushing process is adopted to crush the concrete road to form granular materials, and it further includes: adopting a jaw crushing process to perform primary crushing on the concrete road, adopting a counterattack crushing process to perform secondary crushing on the materials after primary crushing, and adopting an impact crushing process to perform tertiary crushing on the materials after secondary crushing.
[0020] Optionally, the screened materials are mixed and then spread on the roadbed and subjected to gradient compaction, including: mixing the screened materials and spreading them on the roadbed, and performing three compaction stages of initial compaction, re-compaction, and final compaction on the spread materials to perform gradient compaction on the materials.
[0021] Optionally, when the temperature of the construction environment is less than or equal to the target temperature threshold, the interval time between re-compaction and initial compaction is shortened.
[0022] The construction method of the water-stable base layer based on the regeneration of concrete roads provided by the embodiments of the present disclosure can achieve the following technical effects:
[0023] Crushing the concrete road as the materials for the water-stable layer, screening the crushed materials and mixing them with other auxiliary materials, and laying the mixed materials on the roadbed and performing gradient compaction to form the water-stable layer, which is more environmentally friendly. During the crushing stage of the materials, dust suction treatment is carried out. The dust suction treatment can not only remove dust from the crushed materials, reduce the dust in the construction environment, but also reduce the mud content in the materials. Moreover, there is no need to spray water for dust prevention, which reduces the moisture content in the materials, reduces the subsequent mud removal and drying processes, improves the construction efficiency, and reduces the construction cost.
[0024] The above general description and the following description are only exemplary and explanatory, and are not used to limit the present application. Description of the Drawings
[0025] One or more embodiments are exemplarily illustrated by the corresponding drawings. These exemplary illustrations and the drawings do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a proportional limitation, and among them:
[0026] Figure 1 is a construction method of a water-stable base layer based on the regeneration of concrete roads provided by the embodiments of the present disclosure;
[0027] Figure 2 is another construction method of a water-stable base layer based on the regeneration of concrete roads provided by the embodiments of the present disclosure;
[0028] Figure 3 is another construction method of a water-stable base layer based on the regeneration of concrete roads provided by the embodiments of the present disclosure;
[0029] Figure 4It is another construction method of the cement stabilized base layer based on the concrete road regeneration provided by the embodiments of the present disclosure;
[0030] Figure 5 It is another construction method of the cement stabilized base layer based on the concrete road regeneration provided by the embodiments of the present disclosure. Specific embodiments
[0031] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for reference and illustration only and are not intended to limit the embodiments of the present disclosure. In the following technical description, for the sake of explanation, numerous details are provided to give a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other instances, well-known structures and devices may be shown in a simplified manner to simplify the drawings.
[0032] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to implement the embodiments of the present disclosure described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.
[0033] In the embodiments of the present disclosure, the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the embodiments of the present disclosure and their embodiments and are not used to limit that the indicated devices, elements or components must have a specific orientation or be constructed and operated in a specific orientation. And, in addition to being able to represent an orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.
[0034] It should be noted that, without conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.
[0035] Combined with Figure 1 As shown, in some embodiments, the construction method of the cement stabilized base layer based on the concrete road regeneration includes:
[0036] S01, crushing the concrete road to form granular materials and performing dust suction treatment during the crushing process;
[0037] S02, screen the crushed materials and control the proportion of materials within each target particle size range;
[0038] S03, mix the screened materials and then spread them on the roadbed and perform gradient compaction.
[0039] Using the construction method for the water-stable base layer based on concrete road regeneration provided by the embodiments of the present disclosure, crushing the concrete road to be used as the materials for the water-stable layer, screening the crushed materials and then mixing them with other auxiliary materials, and laying the mixed materials on the roadbed and performing gradient compaction to form the water-stable layer, which is more environmentally friendly. During the crushing stage of the materials, dust suction treatment is carried out. The dust suction treatment can not only remove dust from the crushed materials, reduce the dust in the construction environment, but also reduce the mud content in the materials. Moreover, there is no need to spray water for dust prevention, reducing the moisture content in the materials, reducing the subsequent mud removal and drying processes, improving the construction efficiency and reducing the construction cost.
[0040] Combined with Figure 2 As shown in
[0041] S01, crush the concrete road to form granular materials and perform dust suction treatment during the crushing process;
[0042] S02, screen the crushed materials and control the proportion of materials within each target particle size range;
[0043] S021, re-crush the materials with a particle size larger than the target particle size threshold;
[0044] S03, mix the screened materials and then spread them on the roadbed and perform gradient compaction.
[0045] Using the construction method for the water-stable base layer based on concrete road regeneration provided by the embodiments of the present disclosure, after screening the crushed materials, re-crush the materials with a relatively larger particle size until the particle size of the materials meets the construction requirements, improving the utilization rate of the materials and reducing the cost.
[0046] Optionally, crushing the concrete road to form granular materials includes: crushing the concrete road using a three-stage crushing process to form granular materials. In this way, using the three-stage crushing process to crush the concrete road can make the particle size of the formed granular materials better meet the particle size requirements of the water-stable layer materials. At the same time, it is easy to separate metals in the crushed materials and control the content of flaky and needle-shaped materials in the materials to meet the requirements.
[0047] Specifically, using the three-stage crushing process makes the particle size of the granular materials less than or equal to 31.5 mm and controls the content of flaky and needle-shaped materials to be less than 15%.
[0048] Optionally, a three-stage crushing process is adopted to crush the concrete road to form granular materials. It also includes: adopting a jaw crushing process to perform primary crushing on the concrete road, adopting a counterattack crushing process to perform secondary crushing on the materials after primary crushing, and adopting an impact crushing process to perform tertiary crushing on the materials after secondary crushing. In this way, a jaw crusher is used to perform primary crushing on the concrete road, so that the particle size of the crushed materials is less than or equal to 150 mm. A counterattack crusher is used to perform secondary crushing on the materials after primary crushing, so that the discharge particle size is less than or equal to 50 mm. A vertical shaft impact crusher is used to perform tertiary crushing on the materials after secondary crushing, so that the discharge particle size is less than or equal to 31.5 mm, and the content of flaky and needle-shaped materials is controlled to be less than or equal to 12%. Through the step-by-step crushing process, granular materials with relatively uniform particle sizes are formed, and the materials can better replace the water-stable layer aggregate for use.
[0049] When performing primary crushing, a jaw crusher is used. The maximum feeding size of the feeding port is less than or equal to 800 mm. It is necessary to pre-treat and remove oversized concrete blocks. The discharge particle size is less than or equal to 150 mm. By adjusting the jaw plate spacing to 200 mm, the processing capacity is 200 - 350 t / h, and it is adjusted according to the motor power of 160 - 250 kW; the vibrating feeder is used to feed the materials evenly to avoid material blockage, and the amplitude is 5 mm.
[0050] When performing secondary crushing, a counterattack crusher is used. Its rotor diameter is 1300 mm, the rotation speed is 600 r / min, the feeding size is less than or equal to 150 mm, and the discharge particle size is less than or equal to 50 mm. It is achieved by adjusting the gap between the counterattack plate and the rotor to 30 - 50 mm. The processing capacity is 150 - 250 t / h; a grid screen with a pore diameter of 50 mm is added at the bottom of the crushing cavity. The unqualified materials are recycled for crushing, and a multi-stage counterattack plate design is adopted to enhance the aggregate collision and shaping effect.
[0051] When performing tertiary crushing, a vertical shaft impact crusher is used. The linear velocity is 65 m / s, the power is 315 kW, the feeding size is less than or equal to 50 mm, and the discharge particle size is less than or equal to 31.5 mm. It is achieved by adjusting the gap between the throwing head and the peripheral guard plate; the content of flaky and needle-shaped materials is less than or equal to 12%, and the impeller rotation speed is optimized to 1200 r / min; through the closed-circuit circulation system, the unqualified aggregate is returned to the crushing cavity through a vibrating screen (screen hole 31.5 mm); the particle shape control adopts the "stone-on-stone" crushing mode to reduce the generation of weak particles.
[0052] Optionally, the screened material is mixed and then spread on the subgrade and subjected to gradient compaction, including: mixing the screened material and spreading it on the subgrade, and performing three compaction stages of initial compaction, re-compaction, and final compaction on the spread material to perform gradient compaction on the material. In this way, by performing gradient compaction on the spread material, the spread material undergoes three compaction stages of initial compaction, re-compaction, and final compaction, which can improve the strength and durability of the regenerated water-stable layer and extend the service life of the water-stable layer.
[0053] Optionally, a 13t tandem vibratory roller is used to perform initial compaction on the spread material, a 32t pneumatic-tyred roller is used to perform re-compaction on the material after initial compaction, and a 10t tandem roller is used to perform final compaction on the material after re-compaction. In this way, the material is initially stabilized and shaped through initial compaction, the material is densified and strengthened through re-compaction, and the surface of the material is modified through final compaction, so that the strength, density, and flatness of the formed water-stable layer are relatively high, and the service life of the regenerated water-stable layer is extended.
[0054] For the initial compaction stage, the equipment selected is a 13t tandem vibratory roller with an adjustable amplitude of 0.3 - 1.2mm, the compaction mode is 1 pass of static compaction plus 2 passes of weak vibration, the amplitude of weak vibration is 0.5mm, and the frequency is 30Hz; the compaction speed is 1.5 - 2.0km / h; the overlapping width is 1 / 3 of the width of the steel wheel, approximately 30cm, and the temperature control is that the surface temperature of the mixture ≥ 50°C, monitored by an infrared thermometer, which can initially stabilize the material and eliminate the voids in the loose layer.
[0055] For the re-compaction stage, the equipment selected is a 32t pneumatic-tyred roller with an inflation pressure of 700kPa and 11 tyres; the compaction mode is 4 - 6 passes of tyre kneading compaction, first moving forward and then backward, the compaction speed is 2.5 - 3.5km / h; the overlapping width is full coverage of the tyre imprint, and the water spraying system is an intermittent spray to prevent wheel sticking; it can fill the gaps between coarse aggregates through the flexible pressure of the tyres and improve the density.
[0056] For the final compaction stage, the equipment selected is a 10t tandem roller without a vibration mode, the compaction mode is 2 passes of static compaction, first moving forward and then backward, the compaction speed is 3.0 - 4.0km / h; the compaction direction is obliquely compacted at 15° to the route direction to eliminate wheel marks; it can seal the micro-cracks on the surface and improve the flatness.
[0057] Optionally, when the temperature of the construction environment is less than or equal to the target temperature threshold, the interval time between re-compaction and initial compaction is shortened. In this way, when the temperature of the construction environment is relatively low, the temperature of the laid material drops relatively fast, affecting various properties after compaction. Therefore, shortening the interval time between re-compaction and initial compaction ensures the compaction degree and strength of the water-stable layer.
[0058] Optionally, the target temperature threshold is 10°C. In this way, when the temperature of the construction environment is less than or equal to 10°C, it will affect the performance after compaction, so the interval time between the second compaction and the first compaction is shortened.
[0059] Optionally, when the temperature of the construction environment is less than or equal to 10°C and greater than 5°C, the interval time between the second compaction and the first compaction is less than or equal to 30 minutes. In this way, when the temperature of the construction environment is less than or equal to 10°C and greater than 5°C, the temperature of the construction environment is relatively low at this time, so the interval time between the second compaction and the first compaction needs to be shortened. However, considering the compaction effect of the material, and the compaction effect of the material is related to the interval time between the second compaction and the first compaction, a shorter interval time will also lead to poor compaction effect. Therefore, the interval time between the second compaction and the first compaction is less than or equal to 30 minutes, which can not only ensure the compaction effect of the material, but also reduce the influence of low temperature on the compaction effect.
[0060] Optionally, when the temperature of the construction environment is less than or equal to 5°C and greater than 0°C, the interval time between the second compaction and the first compaction is less than or equal to 20 minutes, the discharge temperature of the laid material increases by 5°C, and an early strength agent is mixed. In this way, when the temperature of the construction environment is less than or equal to 5°C and greater than 0°C, the temperature of the construction environment is relatively low at this time. If the interval time between the second compaction and the first compaction is long, the influence on the compaction effect is relatively large. Therefore, the interval time between the second compaction and the first compaction is less than or equal to 20 minutes, and an early strength agent needs to be mixed to further improve the strength and ensure the compaction effect.
[0061] Optionally, when the temperature of the construction environment is less than or equal to 5°C and greater than 0°C, after the first compaction, a heat preservation cloth is covered, and the heat preservation cloth is gradually uncovered during the second compaction. In this way, when the temperature of the construction environment is relatively low, in order to ensure the compaction effect, a heat preservation cloth is immediately covered for heat preservation after the first compaction is completed, and the heat preservation cloth is gradually uncovered as the progress of the second compaction, reducing the loss of the material temperature and improving the compaction effect.
[0062] Optionally, the length difference between the uncovered length of the heat preservation cloth and the length of the second compaction is kept within 2 meters. In this way, when the heat preservation cloth is gradually uncovered during the second compaction, and the length difference between the uncovered length of the heat preservation cloth and the length of the second compaction is always kept within the range of 2 meters, it can not only reduce the loss of the temperature of the paved material and ensure the compaction effect, but also improve the safety and reduce the potential safety hazards.
[0063] It can be understood that the early strength agent can be selected to add 2% calcium formate, which can increase the early strength by 30%.
[0064] Optionally, when the temperature of the construction environment is less than or equal to 0°C, the construction is stopped.
[0065] After the construction is stopped, heating tools such as electric blankets can be covered at night to prevent the surface from freezing.
[0066] Combined Figure 3 As shown, in some other embodiments, a construction method for a water-stable base layer based on the regeneration of a concrete road includes:
[0067] S01, crushing the concrete road to form granular materials and performing dust suction during the crushing process;
[0068] S011, removing the metal skeleton from the crushed materials so that the metal content in the crushed materials is lower than the target value;
[0069] S02, screening the crushed materials and controlling the proportion of materials within each target particle size range;
[0070] S03, mixing the screened materials and spreading them on the roadbed, and performing gradient compaction.
[0071] When using the construction method for a water-stable base layer based on the regeneration of a concrete road provided by the embodiments of the present disclosure, there may be metal skeletons such as steel bars in some concrete roads. Therefore, it is necessary to remove the metal skeletons before screening to avoid the influence of metal skeletons such as steel bars on screening.
[0072] Optionally, use the primary, secondary, and tertiary crushing processes to remove the metal skeleton after crushing. In this way, the metal skeleton is removed during the tertiary crushing process of the materials, improving the removal efficiency of the metal skeleton and reducing costs.
[0073] Exemplarily, a rotary electromagnetic separator is set after primary crushing to remove metal skeletons such as steel bars. The crushed materials are evenly conveyed to the separation area through a belt conveyor. The rotating speed of the rotating wheel is adjusted to 20 r / min. After the electromagnet is energized, it adsorbs the steel bars; the non-magnetic materials freely fall into the lower collection tank. When the rotating wheel rotates to the non-magnetic field area, the power is cut off, and the adsorbed steel bars fall into a special collection hopper for steel bar separation; after separation, the purity of the steel bars is ≥90%, and the residual concrete fragments are ≤5%; a eddy current separator is set after secondary crushing to separate non-ferrous metals, and the metal residue rate is controlled: ferrous ≤0.3%, non-ferrous ≤0.1%.
[0074] Combined Figure 4 As shown, in some other embodiments, a construction method for a water-stable base layer based on the regeneration of a concrete road includes:
[0075] S01, crushing the concrete road to form granular materials and performing dust suction during the crushing process;
[0076] S02, screening the crushed materials and controlling the proportion of materials within each target particle size range;
[0077] S022. When the mud content in the crushed material is greater than the target mud content, dust suction treatment is carried out during the screening process;
[0078] S03. The screened material is mixed and then spread on the roadbed, and gradient compaction is carried out.
[0079] When using the water-stable base construction method based on concrete road regeneration provided by the embodiments of the present disclosure, if the mud content in the crushed material is relatively large, subsequent mud removal operations still need to be carried out on the crushed material. Usually, methods such as water washing are used for mud removal, which will affect the moisture content of the material, and the material also needs to be dried, increasing the cost. Therefore, dust suction treatment is carried out again during the screening process to reduce the mud content in the material and achieve a dust removal effect. The screened material is convenient for drying, reducing the cost. Moreover, the particle size of the material that has undergone multiple screenings during the screening process is relatively small, and the mud in the material is easy to adsorb and remove, improving the efficiency of mud removal.
[0080] Exemplarily, the material is subjected to dust suction treatment by a dust suction device. The dust is sucked in with the air and settles when passing through the adsorption module, which will not be elaborated here.
[0081] Optionally, the target mud content is 3%.
[0082] Optionally, carrying out dust suction treatment during the screening process includes: determining the target duration of dust suction according to the range of the mud content in the crushed material, and carrying out dust suction treatment on the material for the target duration. In this way, the required mud removal duration for different mud contents is different. Therefore, determining the target duration of dust suction according to the range of the mud content in the material can improve the mud removal effect and make the mud content of the material lower than the target mud content.
[0083] Optionally, determining the target duration of dust suction according to the range of the mud content in the crushed material includes: when the mud content in the material is more than three times the target mud content, the target duration is equal to the screening duration; when the mud content in the material is less than or equal to three times the target mud content and greater than the target mud content, the target duration is two-thirds of the screening duration. In this way, when the mud content is relatively large, the dust generated during the screening of the material is relatively large, and the required mud removal time is also relatively long. Therefore, the target duration is equal to the screening duration, that is, dust suction treatment is carried out simultaneously during the screening until the screening ends, improving the dust prevention and mud removal effects. When the mud content is relatively small, the dust generated during the screening of the material is relatively small, and the required mud removal time is also relatively short. Therefore, the target duration is equal to two-thirds of the screening duration, and only dust suction treatment needs to be carried out for a period of time during the screening, reducing energy consumption.
[0084] Optionally, when the mud content in the material is less than or equal to three times the target mud content and greater than the target mud content, after screening for one-third of the time, dust suction treatment is carried out. In this way, since most impurities such as mud accumulate at the bottom of the material, the mud content in the material at the early stage of screening is not high, and the mud content is higher and higher towards the later stage. Therefore, dust suction treatment is started after screening for one-third of the time, which reduces energy consumption while improving the dust removal and mud removal effects.
[0085] Combined with Figure 5 As shown, in some other embodiments, the construction method of the cement stabilized base layer based on the concrete road regeneration includes:
[0086] S01, crushing the concrete road to form granular materials, and carrying out dust suction treatment during the crushing process;
[0087] S02, screening the crushed materials, and controlling the proportion of the materials within each target particle size range;
[0088] S023, when the mud content in the crushed materials is less than or equal to the target mud content, using an atomizing spray system to suppress dust, and at the same time wetting the materials to increase the water content of the materials;
[0089] S03, mixing the screened materials and then paving them on the roadbed, and carrying out gradient compaction.
[0090] Using the construction method of the cement stabilized base layer based on the concrete road regeneration provided by the embodiments of the present disclosure, when the mud content of the materials is less than or equal to the target mud content, at this time, the materials do not need to be subjected to dust suction treatment, but dust will still be generated during the screening of the materials. Therefore, the atomizing spray system is stepped on to spray water to suppress the generation of dust, and at the same time increase the water content of the materials, which is convenient for the subsequent mixing treatment of the materials.
[0091] Exemplarily, the atomizing spray system suppresses the generation of dust by atomizing and spraying water. At the same time, the atomized and sprayed water can wet the materials when it falls into the materials, which will not be elaborated here.
[0092] The above description and the drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural and other changes. The embodiments only represent possible variations. Unless explicitly required, the individual components and functions are optional, and the order of operations can vary. Parts and features of some embodiments may be included in or substituted for parts and features of other embodiments. The embodiments of the present disclosure are not limited to the structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.
Claims
1. A construction method for a water-stable base layer based on the regeneration of concrete roads, characterized in that, Including: Crush the concrete road to form granular materials, and perform dust suction during the crushing process; Screen the crushed materials, and control the proportion of materials within each target particle size range; Mix the screened materials and then spread them on the roadbed, and perform gradient compaction.
2. The construction method of the water-stable base layer based on the regeneration of concrete roads according to claim 1, characterized in that, When the concrete road contains a metal skeleton, before screening the crushed materials and controlling the proportion of materials within each target particle size range, it further includes: Remove the metal skeleton from the crushed materials to make the metal content in the crushed materials lower than the target value.
3. The construction method of the water-stable base layer based on concrete road regeneration according to claim 1, characterized in that, When the mud content in the crushed materials is greater than the target mud content, while screening the crushed materials and controlling the proportion of materials within each target particle size range, it further includes: Perform dust suction during the screening process.
4. The construction method of the water-stable base layer based on the regeneration of concrete roads according to claim 3, characterized in that, Performing dust suction during the screening process includes: Determine the target duration of dust suction according to the range of the mud content in the crushed materials, and perform dust suction on the materials for the target duration.
5. The construction method of the water-stable base layer based on concrete road regeneration according to claim 1, characterized in that, When the mud content in the crushed materials is less than or equal to the target mud content, while screening the crushed materials and controlling the proportion of materials within each target particle size range, it further includes: Use an atomizing spray system to suppress dust, and at the same time wet the materials to increase the water content of the materials.
6. The construction method of the water-stable base layer based on concrete road regeneration according to claim 1, characterized in that, After screening the crushed materials and controlling the proportion of materials within each target particle size range, it further includes: Re-crush the materials with a particle size greater than the target particle size threshold.
7. The construction method of the water-stable base layer based on concrete road regeneration according to claim 1, characterized in that, Crushing the concrete road to form granular materials includes: Use a three-stage crushing process to crush the concrete road to form granular materials.
8. The construction method of the water-stable base layer based on concrete road regeneration according to claim 7, characterized in that, Using a three-stage crushing process to crush the concrete road to form granular materials further includes: Use a jaw crushing process to perform primary crushing on the concrete road, use a counterattack crushing process to perform secondary crushing on the materials after primary crushing, and use an impact crushing process to perform tertiary crushing on the materials after secondary crushing.
9. The construction method of the water-stable base layer based on the regeneration of concrete roads according to any one of claims 1 to 8, characterized in that, Mixing the screened materials and then spreading them on the roadbed and performing gradient compaction includes: Mix the screened materials and then spread them on the roadbed, perform three compaction stages of initial compaction, re-compaction and final compaction on the spread materials, and perform gradient compaction on the materials.
10. The construction method of the water-stable base layer based on the regeneration of the concrete road according to claim 9, characterized in that When the temperature of the construction environment is less than or equal to the target temperature threshold, shorten the interval time between re-compaction and initial compaction.