CN115012271A - Method for treating construction joint in pavement paving process of steel slag asphalt mixture - Google Patents
Method for treating construction joint in pavement paving process of steel slag asphalt mixture Download PDFInfo
- Publication number
- CN115012271A CN115012271A CN202210503374.XA CN202210503374A CN115012271A CN 115012271 A CN115012271 A CN 115012271A CN 202210503374 A CN202210503374 A CN 202210503374A CN 115012271 A CN115012271 A CN 115012271A
- Authority
- CN
- China
- Prior art keywords
- pavement
- paving
- asphalt mixture
- construction
- steel slag
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010276 construction Methods 0.000 title claims abstract description 101
- 239000010426 asphalt Substances 0.000 title claims abstract description 91
- 239000000203 mixture Substances 0.000 title claims abstract description 79
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 62
- 239000010959 steel Substances 0.000 title claims abstract description 62
- 239000002893 slag Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 52
- 230000008569 process Effects 0.000 title claims abstract description 26
- 238000005520 cutting process Methods 0.000 claims abstract description 31
- 238000004140 cleaning Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 29
- 238000005096 rolling process Methods 0.000 claims description 25
- 239000000835 fiber Substances 0.000 claims description 9
- 238000005056 compaction Methods 0.000 claims description 7
- 235000019738 Limestone Nutrition 0.000 claims description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 6
- 239000006028 limestone Substances 0.000 claims description 6
- 239000011707 mineral Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 239000003381 stabilizer Substances 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 5
- 238000003892 spreading Methods 0.000 claims description 4
- 230000007480 spreading Effects 0.000 claims description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 239000012790 adhesive layer Substances 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- 229920005610 lignin Polymers 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 230000009191 jumping Effects 0.000 abstract description 4
- 239000004567 concrete Substances 0.000 description 6
- 239000011384 asphalt concrete Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003550 marker Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 241001536352 Fraxinus americana Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/182—Aggregate or filler materials, except those according to E01C7/26
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/187—Repairing bituminous covers, e.g. regeneration of the covering material in situ, application of a new bituminous topping
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Repair (AREA)
Abstract
The invention belongs to the technical field of engineering construction, and particularly relates to a method for treating construction joints in a pavement paving process of a steel slag asphalt mixture, which comprises the following steps: (1) determining the position of a construction joint after the paving interruption; (2) cutting and cleaning a pavement section formed by the paving interruption, and enabling the cut section formed after cutting to be vertical to a central line of the pavement paving direction: manually adopting an air pick to dig and align the pavement sections, wherein the thickness of the digging is the thickness of the layer pavement; (3) preparing before the next construction, and heating the paved road surface asphalt mixture close to the construction joint to a temperature of more than or equal to 160 ℃; (4) paving the asphalt mixture at the construction joints; (5) and compacting the asphalt mixture at the construction joints. The method for treating the construction joint in the pavement paving process of the steel slag asphalt mixture can effectively improve the pavement evenness, avoid or improve the phenomenon of vehicle jumping at the joint and contribute to improving the driving comfort of the highway.
Description
Technical Field
The invention belongs to the technical field of engineering construction, and particularly relates to a method for treating construction joints in a pavement paving process of a steel slag asphalt mixture.
Background
The construction joint (construction joint) refers to a joint formed between the concrete poured before and after the concrete is poured in sections due to design requirements or construction requirements in the concrete pouring process. The construction joint is not a real existing 'joint', and only because the initial setting time of the first poured concrete is longer than the initial setting time, a joint surface exists between the first poured concrete and the later poured concrete, and the joint surface is called as the construction joint.
The asphalt pavement construction joint comprises a transverse joint and a longitudinal joint, and the longitudinal joint is mainly a construction joint which cannot be paved simultaneously during the whole pavement construction. Most of the roads are ramps and widened road sections. The transverse seams are mostly generated by the discontinuity of a construction road section, the fault of an asphalt mixing plant or paving surface layer machinery, and the lifting and the resetting of a paver.
If the construction joint is not properly treated, the problems of poor pavement evenness at the joint, vehicle jumping and the like are easy to occur. In addition, when the steel slag asphalt mixture is adopted for paving the road surface, the steel slag raw materials present instability, the treatment difficulty of the construction joint is increased, and the treatment requirement on the construction joint is higher.
Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The inventor finds that in practical application, when the construction joint of the steel slag asphalt mixture road surface is treated, the setting position of the construction joint is determined, and the section is cut, the problem that the bonding performance of the joint is poor and holes are easy to generate exists.
The invention aims to provide a method for treating a construction joint in a steel slag asphalt mixture pavement paving process, which aims to solve or improve at least one of the problems that the pavement flatness is poor, the vehicle jumping phenomenon exists, the bonding performance of the joint is poor, holes are easy to generate and the like easily appearing at the construction joint when the steel slag asphalt mixture is adopted to pave a pavement.
In order to achieve the above purpose, the invention provides the following technical scheme: a method for treating construction joints in the pavement paving process of a steel slag asphalt mixture comprises the following steps: (1) determining the position of a construction joint after the paving interruption; (2) cutting and cleaning a pavement section formed by the paving interruption, so that the cut section formed after cutting is vertical to the central line of the pavement paving direction: manually adopting an air pick to dig and align the pavement sections, wherein the thickness of the digging is the thickness of the layer pavement; (3) preparing before the next construction, and heating the paved road surface asphalt mixture close to the construction joint to a temperature of more than or equal to 160 ℃; (4) paving the asphalt mixture at the construction joints; (5) and compacting the asphalt mixture at the construction joints.
Preferably, in the step (1), when the temperature of the paved asphalt mixture is reduced to a first temperature, the falling end flatness of the paved road surface is measured, the falling end flatness is measured by using a measuring tool at a measuring point position along a direction parallel to the pavement paving direction, and a contact position where the measuring tool is separated from the road surface is the construction joint position.
Preferably, the gap in the contact range of the measuring tool and the road surface at the position of the construction joint is less than or equal to 2mm, and the first temperature is more than or equal to 50 ℃.
Preferably, the method further comprises the step of providing a marker at the construction joint location: and (5) pulling wires and spreading lime on two sides of the road surface to determine cutting section lines.
Preferably, at least 3 measuring points are taken when the position of the construction joint is determined; the measuring tool is a ruler; when the ambient temperature is 28-35 ℃, the first temperature is 50-60 ℃.
Preferably, in the step (2), the cutting section is planed and aligned manually by adopting an air pick, the planing thickness is the thickness of the layer pavement, and the distance between the construction joints of the upper layer and the lower layer of the pavement is more than or equal to 2 m.
Preferably, step (3) comprises: the construction joint is smeared with the adhesive layer asphalt, the paver is adopted to improve the initial compaction degree of the mixture, the front edge of a screed of the paver is positioned at the construction joint 3-8cm, a base plate is arranged in the width direction of the screed, the thickness of the base plate is the virtual paving thickness of a paving layer, and the screed is dropped to heat the asphalt mixture at the construction joint.
Preferably, in the step (4), during paving, the automatic leveling instrument of the paver is closed first, after the paving thickness is determined, the height of the ruler is adjusted when the distance is 3-5m from the paved road surface, and the automatic leveling instrument is opened for paving after the paving thickness is appropriate.
Preferably, in the rolling in the step (5), the rolling is firstly performed in a direction perpendicular to the paving direction of the road surface, and then the rolling is performed in a direction parallel to the paving direction of the road surface.
Preferably, when rolling is carried out in the direction vertical to the pavement paving direction, the road roller is positioned on the paved pavement, and a new pavement is pressed into the road roller for the first time by 12-18 cm; and then moving the newly laid asphalt mixture for 15-20cm each time until the road roller is completely positioned on the newly laid asphalt mixture.
Preferably, the roller is vibrated by forward static pressure and backward rolling in a direction parallel to the paving direction of the road surface.
Preferably, the steel slag asphalt mixture comprises SBS modified asphalt, steel slag aggregate, fine aggregate, mineral powder and fiber stabilizer; the steel slag aggregate has a free calcium oxide content of less than or equal to 30 percent and a water-soaking expansion rate of less than or equal to 1.8 percent; the fine aggregate is limestone machine-made sand; the mineral powder is obtained by grinding limestone; the fiber stabilizer is flocculent lignin fiber.
Has the advantages that:
the method for treating the construction joint in the pavement paving process of the steel slag asphalt mixture can effectively improve the pavement evenness, avoid or improve the phenomenon of vehicle jumping at the joint and is beneficial to improving the driving comfort of the highway.
The method for treating the construction joint in the process of paving the steel slag asphalt mixture pavement is suitable for treating the transverse joint in the process of paving the steel slag asphalt concrete pavement, and can effectively avoid or improve the problems of poor bonding property and easy generation of holes at the joint.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiment(s) of the invention and together with the description serve to explain the invention and not to limit the invention. Wherein:
FIG. 1 is a process flow chart of a method for treating construction joints in a pavement paving process of a steel slag asphalt mixture according to an embodiment of the invention;
fig. 2 is a schematic diagram of a position structure of a cutting section in a method for treating a construction joint in a pavement paving process of a steel slag asphalt mixture according to an embodiment of the present invention;
reference numerals:
1-cutting a section; 2-a measuring tool; 3, paving a layer; 4-a lower bearing layer; 5-road surface.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
The present invention will be described in detail with reference to examples. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The inventor finds that in practical application, when the construction joint of the steel slag asphalt mixture pavement is treated, the setting position of the construction joint is determined, and the fracture surface is cut, the problems that the bonding performance of the joint is poor and holes are easy to generate occur.
The invention provides a method for treating a construction joint in a steel slag asphalt mixture pavement paving process, aiming at solving or improving at least one problem in the steel slag asphalt concrete construction joint treatment process, aiming at solving the problems that the improper treatment of the construction joint is easy to cause poor pavement flatness at the joint, car jump, poor bonding property at the joint, easy generation of holes and the like in the prior discontinuous construction.
In the invention, the pavement paving direction is defined as longitudinal direction, and the pavement width direction is defined as transverse direction.
As shown in fig. 1, the method for treating a construction joint in a pavement paving process of a steel slag asphalt mixture according to an embodiment of the present invention includes the following steps: (1) determining the position of a construction joint after the paving interruption; (2) cutting and cleaning a pavement section formed by the paving interruption, and enabling the cut section formed after cutting to be vertical to a central line of the pavement paving direction: manually adopting an air pick to dig and align the section of the pavement, wherein the thickness of the dug-off is the thickness of the layer pavement (the pavement is cleared in time after the chiseling is finished); (3) preparing before the next construction; (4) paving the asphalt mixture at the construction joints; (5) compacting the asphalt mixture at the construction joints; the asphalt mixture is steel slag asphalt mixture.
According to the invention, the cutting section of the steel slag asphalt mixture pavement is processed in a mode of manually planing and aligning the cutting section by using the pneumatic pick, so that the problems of poor bonding performance and easy generation of holes at the joint when a cutting machine is used for cutting the pavement can be effectively avoided. In the step (2), the phrase "the cutting section is perpendicular to the center line of the pavement paving direction" means that the construction joint is a transverse joint, the cutting section and the pavement paving direction (longitudinal direction) are approximately at a right angle, and an oblique joint is strictly forbidden.
In the preferred embodiment of the present invention, in step (1), when the temperature of the asphalt mixture after paving is reduced to the first temperature, the flatness of the falling end of the paved road surface is measured, the flatness of the falling end is measured by using the measuring tool 2 at the position of the measuring point along the direction parallel to the paving direction of the road surface (longitudinal direction), and the contact point (as shown in fig. 2, the position of the cutting section 1 in fig. 2) where the measuring tool 2 is separated from the road surface 5 (the pavement layer 3 and the lower bearing layer 4 are sequentially arranged below the road surface 5) is the position of the construction joint. Specifically, the first temperature is determined according to the construction environment temperature, the temperature of the steel slag asphalt mixture is rapidly dissipated, the temperature of the steel slag asphalt mixture paved on the road surface can be detected for multiple times according to actual conditions, and the temperature is prevented from being too low. Further preferably, the first temperature is ≧ 50 ℃.
In the preferred embodiment of the invention, the gap in the contact range of the measuring tool and the road surface at the position of the construction joint is less than or equal to 2 mm. That is, when the construction joint position is determined, if a measuring tool is used for measuring the road surface, the measured contact range between the measuring tool and the road surface has a gap larger than 2mm, the measuring tool should move backwards (move towards the direction of the paved road surface) and measure again until the measurement result meets the requirement, and the flatness of the road surface joint is ensured to meet the requirement.
In a preferred embodiment of the present invention, the method further comprises the step of providing a marker at the construction joint location: drawing wires on two sides of the road surface, and spreading lime to determine a cutting section line; through setting up the mark, help realizing the accurate positioning of construction joint position.
In the preferred embodiment of the invention, at least 3 measuring points are taken when the position of the construction joint is determined; specifically, the requirement of the flatness of the falling end of the paved road can be met only when the gap of the contact range of the measuring tool and the road, measured at least at 3 measuring points, is less than or equal to 2mm, and the position of the construction joint is determined.
In a preferred embodiment of the invention, the measuring tool is a ruler. For example, a 5m ruler may be selected.
In a preferred embodiment of the invention, the first temperature is 50-60 deg.C (e.g., 50 deg.C, 55 deg.C or 60 deg.C) when the ambient temperature is 28-35 deg.C (e.g., 28 deg.C, 32 deg.C or 35 deg.C). That is, when the temperature of the steel slag asphalt mixture is reduced to 50-60 ℃, the location of construction joints (e.g., transverse joints) starts to be determined.
Specifically, the step (1) is as follows: after the steel slag asphalt mixture is paved and rolled on the same day, the temperature of the asphalt to be paved is reduced to 50-60 ℃ (the specific temperature is determined according to the construction environment temperature, the temperature of the steel slag asphalt mixture is rapidly dissipated, the temperature of 50-60 ℃ is a reference temperature with the environment temperature of 28-35 ℃), the flatness of the laid section end is measured, a 5m ruler is used for enabling the ruler at the end part of the paved section to be in a cantilever shape along the longitudinal position, the transverse joint position is determined by the contact position of the paved layer and the ruler, if the gap between the ruler and the road surface is larger than 2mm, the ruler is moved backwards and is re-measured, no less than 3 measuring points are arranged on each section, when the gap between the ruler and the road surface is smaller than 2mm, the contact position of the paved layer and the ruler is the transverse joint position, then, the wire drawing and spreading white ash on the two sides of the road surface to determine the cutting section line, the cutting section should be perpendicular to the centerline of the line.
In the preferred embodiment of the invention, in the step (2), the distance between the construction joints of the upper and lower surface layers of the pavement is more than or equal to 2 m.
Specifically, the step (2) is as follows: and after the cutting position is determined, starting to perform cutting and section processing. In order to ensure the bonding performance of the joint and avoid the generation of holes, the transverse joint is prevented from being cut by a cutting machine, the construction is finished on the same day, the temperature of the mixture is not lower than 50 ℃, an air pick is manually adopted to dig and align the transverse joint, the chiseling thickness is the layer-paving thickness, and the transverse joint is timely cleaned after the chiseling is finished. The cutting direction and the laying direction of the transverse joint are approximately right angles, and an oblique joint is forbidden. Meanwhile, the transverse seams of the upper layer and the lower layer cannot be overlapped and are staggered by more than 2m at least. Because the joint position is the weak area of pavement structure, should avoid the upper and lower structural layer seam of pavement to concentrate, the upper and lower layer seam setting of staggering can reduce the disease and take place during the operation.
In a preferred embodiment of the present invention, step (2) is followed by the step of closing traffic: after the pavement section is cut and cleaned, hard protection such as a movable steel guardrail or a new Jersey guardrail is adopted to carry out traffic closure on the construction road section, any vehicle is strictly forbidden to run, and the phenomenon that the construction joint collapses due to rolling of the vehicle is avoided.
In a preferred embodiment of the present invention, step (3) comprises: the method comprises the steps of smearing adhesive layer asphalt at a construction joint, improving the initial compaction degree of the mixture by adopting a paver, enabling the front edge of a screed of the paver to be located at a position 3-8cm (for example, 3cm, 5cm or 8cm) of the construction joint, arranging a backing plate in the width direction of the screed, enabling the thickness of the backing plate to be the virtual paving thickness of a paving layer, and then dropping the screed to heat the asphalt mixture at the construction joint so that the temperature of rolling the steel slag asphalt mixture at the construction joint is not less than 160 ℃ (the compaction degree and rolling effect of the steel slag asphalt mixture can be improved by fully heating, and the construction quality of the joint is improved). Wherein, the bonding layer asphalt can adopt quick-crack SBS modified emulsified asphalt; the layer virtual paving thickness is the loose paving thickness-layer paving thickness. Wherein,
specifically, the step (3) is as follows: cleaning a cutting section before construction, smearing a proper amount of quick-breaking SBS modified emulsified asphalt on the cutting section, selecting a self-weight high-power high paver as much as possible to improve the initial compaction degree of the steel slag asphalt mixture, moving the paver to a transverse seam to enable the front edge of a screed to be located at about 5cm of the cutting section, padding two to three boards in the width direction of the paver, wherein the thickness is the layer-laying virtual paving thickness (loose paving thickness-layer paving thickness), and then dropping the screed to heat the asphalt pavement at the transverse seam, so that the temperature of asphalt rolling at the transverse seam is not lower than 160 ℃ (asphalt compaction temperature).
In the preferred embodiment of the present invention, in step (4), during paving, the automatic leveling instrument of the paving machine is first closed, after the paving thickness is determined, when the distance from the paved road surface is 3 to 5m (for example, 3m, 4m or 5m), the height of the scale is adjusted, and after the paving thickness is appropriate, the automatic leveling instrument is opened for paving.
Specifically, the step (4) is as follows: when the steel slag asphalt mixture is paved, the last two vehicle materials which are just transported to the site are paved, the steel slag asphalt mixture is poured into the paver by the skip car, the paver is assisted by a spiral distributor to evenly distribute the steel slag asphalt mixture in the baffle manually, the steel slag asphalt mixture stays for 8-10min (for example, 8min, 9min or 10min) and then starts, when the paver starts, the automatic leveling instrument is closed, a site technician needs to measure the paving thickness in time, when the asphalt surface is 3-5m (for example, 3m, 4m or 5m) away from the original asphalt surface, the height of the scale is adjusted, and when the paving thickness is proper, the automatic leveling instrument is opened in time for paving.
In a preferred embodiment of the present invention, during rolling in step (5), rolling is performed in a direction perpendicular to the paving direction of the road surface, and then rolling is performed in a direction parallel to the paving direction of the road surface. Namely, transverse rolling is firstly carried out, and then longitudinal rolling is carried out.
In a preferred embodiment of the invention, the roller is positioned on the paved road surface and is pressed into a new pavement layer for a first time by 12-18cm (e.g. 12cm, 14cm, 16cm or 18cm) while rolling in a direction perpendicular to the paving direction of the road surface; thereafter, each pass is moved 15-20cm (e.g., 15cm, 18cm or 20cm) towards the new asphalt mix until the roller is fully seated on the new asphalt mix.
In the preferred embodiment of the invention, the road roller vibrates forward and backward under static pressure when rolling in the direction parallel to the central line of the pavement paving direction.
Specifically, the step (5) is as follows: the rolling of the transverse seam of the upper layer of the steel slag asphalt mixture is carried out by adopting a 14t double-steel-wheel road roller, the rolling of the transverse seam is carried out by adopting the double-steel-wheel road roller firstly, the spraying amount is set to the lowest level, the steel slag asphalt mixture is prevented from being cooled too fast, and the compaction effect is reduced; during rolling, the roller is positioned on the compacted steel slag and asphalt mixture layer, a new paving quantity is 12-18cm (for example, 12cm, 14cm, 16cm or 18cm) is pressed for the first time, and then the roller moves 15-20cm (for example, 15cm, 18cm or 20cm) to the new paving mixture once is pressed until the roller is completely paved; and then longitudinal rolling is carried out, when the road roller is longitudinally rolled, the road roller cannot turn around, turn around and stop with water on the road section which is not rolled, and when the road roller is longitudinally rolled, the road roller is driven to move forward and backward by static pressure, so that the deviation of flatness of the joint caused by the sinking of the joint due to the forward vibration is avoided. And (5) detecting by using a 3m guiding rule after rolling to ensure the flatness of the joint.
In a preferred embodiment of the invention, the steel slag asphalt mixture comprises SBS modified asphalt, steel slag aggregate, fine aggregate, mineral powder and fiber stabilizer; the content of free calcium oxide in the steel slag aggregate is less than or equal to 30 percent, and the water-soaking expansion rate is less than or equal to 1.8 percent; the fine aggregate is limestone machine-made sand; the mineral powder is obtained by finely grinding limestone; the fiber stabilizer is flocculent lignin fiber.
In a preferred embodiment of the present invention, the steel slag asphalt mixture has the following technical standards as shown in table 1:
TABLE 1 technical Standard of Steel slag-asphalt mixture
The volume expansion rate of the steel slag asphalt mixture test piece is not more than 1.5 percent, if the volume expansion rate is more than 1.5 percent, the steel slag needs to be aged until the requirement is met, and then the steel slag can be used.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for treating construction joints in the pavement paving process of a steel slag asphalt mixture is characterized by comprising the following steps:
(1) determining the position of a construction joint after the paving interruption;
(2) cutting and cleaning a pavement section formed by the paving interruption, and enabling the cut section formed after cutting to be vertical to a central line of the pavement paving direction: manually adopting an air pick to dig and align the pavement sections, wherein the thickness of the digging is the thickness of the layer pavement;
(3) preparing before the next construction, and heating the paved road surface asphalt mixture close to the construction joint to a temperature of more than or equal to 160 ℃;
(4) paving the asphalt mixture at the construction joints;
(5) and compacting the asphalt mixture at the construction joints.
2. The method for treating the construction joint in the paving process of the steel slag asphalt mixture pavement according to claim 1, wherein in the step (1), when the temperature of the paved asphalt mixture is reduced to a first temperature, the flatness of the falling end of the paved pavement is measured, the flatness of the falling end is measured by adopting a measuring tool at a measuring point position along a direction parallel to the paving direction of the pavement, and the position where the measuring tool is separated from the pavement and is the position of the construction joint;
preferably, the gap in the contact range of the measuring tool and the road surface at the position of the construction joint is less than or equal to 2mm, and the first temperature is more than or equal to 50 ℃.
3. The method for treating the construction joint in the pavement paving process of the steel slag asphalt mixture as claimed in claim 2, further comprising the step of setting a mark at the position of the construction joint: drawing wires on two sides of the road surface, and spreading lime to determine a cutting section line;
preferably, at least 3 measuring points are taken when the position of the construction joint is determined;
the measuring tool is a ruler;
when the ambient temperature is 28-35 ℃, the first temperature is 50-60 ℃.
4. The method for treating the construction joints in the pavement process of the steel slag asphalt mixture as claimed in claim 1, wherein in the step (2), the cutting sections are planed and aligned manually by using an air pick, the planed thickness is the layer pavement thickness, and the distance between the construction joints of the upper and lower layers of the pavement is more than or equal to 2 m.
5. The method for treating the construction joint in the pavement paving process of the steel slag asphalt mixture as claimed in claim 1, wherein the step (3) comprises: the construction joint is smeared with the adhesive layer asphalt, the paver is adopted to improve the initial compaction degree of the mixture, the front edge of a screed of the paver is positioned at the construction joint 3-8cm, a base plate is arranged in the width direction of the screed, the thickness of the base plate is the virtual paving thickness of a paving layer, and the screed is dropped to heat the asphalt mixture at the construction joint.
6. The method for treating the construction joint in the process of paving the steel slag asphalt mixture pavement according to claim 1, wherein in the step (4), an automatic leveling instrument of a paving machine is closed firstly during paving, after the paving thickness is determined, the height of a scale is adjusted when the distance from the paved pavement is 3-5m, and the automatic leveling instrument is opened for paving after the paving thickness is proper.
7. The method for treating the construction joint in the process of paving the steel slag asphalt mixture pavement according to claim 1, wherein in the step (5), rolling is firstly carried out in the direction perpendicular to the pavement paving direction, and then rolling is carried out in the direction parallel to the pavement paving direction.
8. The method for treating the construction joint in the pavement paving process of the steel slag asphalt mixture as claimed in claim 7, wherein when rolling is carried out in the direction perpendicular to the pavement paving direction, a road roller is positioned on the paved pavement, and a new layer is pressed in for the first time by 12-18 cm;
and then moving the newly laid asphalt mixture for 15-20cm each time until the road roller is completely positioned on the newly laid asphalt mixture.
9. The method for treating the construction joint in the pavement paving process of the steel slag asphalt mixture as claimed in claim 7, wherein the road roller vibrates by forward static pressure and backward static pressure when rolling is carried out in the direction parallel to the pavement paving direction.
10. The method for treating construction joints in the pavement of steel slag asphalt mixture as claimed in any one of claims 1 to 9, wherein the steel slag asphalt mixture comprises SBS modified asphalt, steel slag aggregate, fine aggregate, mineral powder and fiber stabilizer;
the steel slag aggregate has a free calcium oxide content of less than or equal to 30 percent and a water-soaking expansion rate of less than or equal to 1.8 percent;
the fine aggregate is limestone machine-made sand;
the mineral powder is obtained by grinding limestone;
the fiber stabilizer is flocculent lignin fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210503374.XA CN115012271A (en) | 2022-05-09 | 2022-05-09 | Method for treating construction joint in pavement paving process of steel slag asphalt mixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210503374.XA CN115012271A (en) | 2022-05-09 | 2022-05-09 | Method for treating construction joint in pavement paving process of steel slag asphalt mixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115012271A true CN115012271A (en) | 2022-09-06 |
Family
ID=83068985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210503374.XA Pending CN115012271A (en) | 2022-05-09 | 2022-05-09 | Method for treating construction joint in pavement paving process of steel slag asphalt mixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115012271A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001044579A1 (en) * | 1999-12-17 | 2001-06-21 | Mitsui Chemicals, Incorporated | Road reinforcing sheet, structure of asphalt reinforced pavement and method for paving road |
| CN107338696A (en) * | 2017-07-11 | 2017-11-10 | 中交隧道工程局有限公司 | A kind of method of asphalt concrete pavement longitudinal direction cold joint overlap joint |
| CN108330767A (en) * | 2018-01-08 | 2018-07-27 | 深圳市东进技术服务有限公司 | A kind of bituminous paving joint process |
| CN110258236A (en) * | 2019-06-26 | 2019-09-20 | 北京浩德互动科技有限公司 | A kind of high-performance steel slag road surface and its construction method |
| CN112982069A (en) * | 2021-02-20 | 2021-06-18 | 中电建十一局工程有限公司 | Asphalt concrete surface layer construction joint treatment method |
-
2022
- 2022-05-09 CN CN202210503374.XA patent/CN115012271A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001044579A1 (en) * | 1999-12-17 | 2001-06-21 | Mitsui Chemicals, Incorporated | Road reinforcing sheet, structure of asphalt reinforced pavement and method for paving road |
| CN107338696A (en) * | 2017-07-11 | 2017-11-10 | 中交隧道工程局有限公司 | A kind of method of asphalt concrete pavement longitudinal direction cold joint overlap joint |
| CN108330767A (en) * | 2018-01-08 | 2018-07-27 | 深圳市东进技术服务有限公司 | A kind of bituminous paving joint process |
| CN110258236A (en) * | 2019-06-26 | 2019-09-20 | 北京浩德互动科技有限公司 | A kind of high-performance steel slag road surface and its construction method |
| CN112982069A (en) * | 2021-02-20 | 2021-06-18 | 中电建十一局工程有限公司 | Asphalt concrete surface layer construction joint treatment method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104762858B (en) | Asphalt concrete construction method for soft soil matrix pavement | |
| CN104278598B (en) | A kind of self-compaction bituminous concrete water-protected enclosure layer and construction method thereof | |
| CN104446156B (en) | A kind of emulsified bitumen slurry mixture penetration type bituminous paving | |
| CN111485468B (en) | Premixed foam asphalt base layer and subbase layer in-situ cold regeneration construction method | |
| CN103850164A (en) | Construction method of long-service-life pass-through induced drainage pavement | |
| CN112211198A (en) | Municipal road engineering pavement construction technology | |
| CN104911974A (en) | Inclined prestress cement concrete-asphalt concrete composite pavement and construction method thereof | |
| CN110904801A (en) | Construction tool and method for repairing asphalt pavement of highway | |
| CN206887665U (en) | A kind of Asphalt Pavement with Flexible Base splices widened structure | |
| CN105002800B (en) | Pavement overhaul method and structure for treating different lane road surfaces with large road condition differences | |
| CN110273337A (en) | Asphalt roads construction method | |
| CN110644322A (en) | Municipal road construction method | |
| CN112982058A (en) | Vibration mixing construction method for cement stabilized macadam | |
| CN115012271A (en) | Method for treating construction joint in pavement paving process of steel slag asphalt mixture | |
| KR20120007237A (en) | Pavement method for racing track pavement | |
| CN204662193U (en) | Oblique prestressing force cement concrete-bituminous concrete composite pavement | |
| CN209669625U (en) | Concrete Overlays pitch longitudinal joint processing construction | |
| Smith et al. | Portland Cement Concrete Overlays: State of the Technology Synthesis | |
| CN110878502A (en) | Soft soil matrix pavement asphalt concrete construction method | |
| CN103526663A (en) | Method for repairing asphalt concrete pavement distresses by utilization of combined-type concrete repaving surfacing | |
| CN113931032A (en) | Construction method for upper surface layer of asphalt pavement in saline-containing high-humidity-resistant environment | |
| Scherocman | Construction of durable longitudinal joints | |
| CN113417182A (en) | Asphalt pavement paving method capable of reducing air bubbles for highway engineering | |
| CN113235348A (en) | Construction method of pavement with high load-resisting capacity | |
| CN108677643B (en) | Roller compacted concrete composite pavement without cracks and expansion and contraction joints and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |