CN114517433A - Cement stabilized macadam pavement construction process - Google Patents
Cement stabilized macadam pavement construction process Download PDFInfo
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- CN114517433A CN114517433A CN202210157479.4A CN202210157479A CN114517433A CN 114517433 A CN114517433 A CN 114517433A CN 202210157479 A CN202210157479 A CN 202210157479A CN 114517433 A CN114517433 A CN 114517433A
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- road surface
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- 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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
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- 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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/025—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials for preparing hydraulic-cement-bound mixtures of which at least one ingredient has previously been deposited on the surface, e.g. in situ mixing of concrete
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- 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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/05—Crushing, pulverising or disintegrating apparatus; Aggregate screening, cleaning, drying or heating apparatus; Dust-collecting arrangements specially adapted therefor
-
- 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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
- E01C19/18—Devices for distributing road-metals mixed with binders, e.g. cement, bitumen, without consolidating or ironing effect
-
- 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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
- E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
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- 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
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/01—Devices or auxiliary means for setting-out or checking the configuration of new surfacing, e.g. templates, screed or reference line supports; Applications of apparatus for measuring, indicating, or recording the surface configuration of existing surfacing, e.g. profilographs
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- 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
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/03—Arrangements for curing paving; Devices for applying curing means; Devices for laying prefabricated underlay, e.g. sheets, membranes; Protecting paving under construction or while curing, e.g. use of tents
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- 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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to the technical field of pavement paving, and discloses a cement stabilized macadam pavement construction process, which comprises the steps of selecting slag powder, desulfurized gypsum, a composite material, cement, construction waste, sand, water and steel slag micro powder as raw materials, adding the slag powder, desulfurized gypsum, the composite material and the steel slag micro powder into a ball mill in proportion for mixing and grinding to obtain a finished ASSP material, then crushing the construction waste into fragments, wherein the sand is fine sand, the water is clear water with a pH value not lower than 4, and adding the ASSP material, the sand, the water, the fragments of the construction waste and the cement into a stirrer in proportion for mixing and stirring to prepare a mixture. According to the cement stabilized macadam pavement construction process, the waste building materials are used for replacing gravels, so that the building materials are saved, the cost is reduced, meanwhile, the waste steel slag generated by blast furnace steelmaking is utilized, the effects of energy conservation and environmental protection are realized, the waste recycling is realized, and the development of energy conservation and environmental protection is compounded.
Description
Technical Field
The invention relates to the technical field of pavement paving, in particular to a cement stabilized macadam pavement construction process.
Background
The pavement structure layer refers to each paving layer forming the pavement, and mainly comprises a surface layer, a base layer and a cushion layer according to the position and the action of the paving layer. The latest 'design code for asphalt pavement for roads' indicates that a pavement structure layer consists of three parts: surface course, basic unit and subbase. The previous underlayment can be classified as a functional layer or a subgrade treatment layer. The road surface is not only subjected to the action of wheel load, but also affected by natural environmental factors.
In the prior art, concrete is used for paving the pavement, so that a large amount of gravels are consumed, the pavement strength is low, the pavement is easy to damage, and the later maintenance cost is high, so that a cement stabilized macadam pavement construction process needs to be invented to solve the problems.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a cement stabilized macadam pavement construction process, which uses building waste materials to replace gravels, saves building materials, reduces the cost, simultaneously utilizes waste steel slag generated by blast furnace steelmaking, realizes the effects of energy conservation and environmental protection, improves the overall strength of a pavement through novel mixture, ensures that the pavement is not easy to damage, reduces the later maintenance cost, and solves the problems that the existing pavement is easy to damage and the later maintenance cost is high.
(II) technical scheme
In order to realize the purposes that the waste building materials can be used for replacing sand stones, the building materials are saved, the cost is reduced, and meanwhile, the waste steel slag generated by blast furnace steelmaking is utilized, so that the effects of energy conservation and environmental protection are realized, the invention provides the following technical scheme: a cement stabilized macadam pavement construction process comprises the following steps:
s1 screening and preparing raw materials
Firstly, selecting slag powder, desulfurized gypsum, a composite material, cement, construction waste, sand, water and steel slag micro powder as raw materials, adding the slag powder, the desulfurized gypsum, the composite material and the steel slag micro powder into a ball mill in proportion for mixing and grinding to obtain a finished product ASSP material, and then crushing the construction waste into fragments, wherein the sand is fine sand.
S2, mixing and stirring the raw materials to prepare a mixture
Adding the ASSP material, the sand, the water, the building waste fragments and the cement into a stirrer in proportion for mixing and stirring to prepare a mixture, and performing sampling detection on the content of the building waste fragments in the mixture, wherein the content of the building waste fragments in the mixture is not less than forty percent and not more than sixty percent.
S3, pre-paving the mixture and testing the strength
And paving, rolling and maintaining the prepared mixture, paving an experimental road section which is one hundred meters long, and detecting the compactness, flatness and compressive strength of the experimental road section to ensure that the paved road section meets the use standard.
S4, pre-cleaning before paving
The method comprises the steps of preprocessing a road section to be paved, pumping accumulated water on the road surface, filling pits on the road surface, ensuring the flatness of the road surface, drying a wet road surface, and spraying clear water on the road surface before paving.
S5, paving the road surface with the mixture
And pulling the mixture to a road section to be paved by using a dump truck, paving the first layer of the mixture, rolling the mixture by using a road roller until the mixture is leveled, continuously paving the second layer of the road surface on the first layer of the road surface, and rolling the mixture by using the road roller until the second layer of the road surface is leveled.
S6, carrying out primary maintenance on the formed pavement
Spraying the surface of the paved road surface, covering the sprayed road surface with geotextile, spraying the road surface for one time, and continuously maintaining for ten days according to the procedures.
S7 Performance test of formed road surface
And sampling and detecting the road sections after the preliminary maintenance is finished, detecting the width, height, flatness, compactness and compressive strength of the road surface, and dismantling and reworking the road sections which do not meet the standard.
S8, post-maintenance of formed pavement
Sprinkling water once every three to five days on the later-stage road surface, cleaning the road surface once every fifteen to twenty days, filling the pits with the mixture, and tamping and leveling the pits by a tamping machine.
Preferably, in the step S1, the construction solid waste is waste concrete and/or waste brick slag, the composite material is two or more of silica fume, sodium metaaluminate, sodium sulfate and polymer phosphate, the slag powder is S95 granulated blast furnace slag, and the desulfurized gypsum is a ground gypsum product of a common power plant.
Preferably, in step S2, the prepared mix needs to be transported to the paving section within one hour after completion, and the mix needs to be stirred periodically during transportation to prevent the mix from binding during transportation.
Preferably, in the step S3, the pre-paved road section is detected, wherein the compressive strength is not less than 5Mpa, and the degree of compaction is not less than ninety-seven percent, so as to ensure the construction quality of the road section.
Preferably, in step S4, the water pump is used to pump out the accumulated water, the silt mixture is used to level up the road surface, and the tamper is used to tamp the road surface, wherein the spraying of clean water should be controlled within the first half hour of laying the mixture, so as to prevent the road surface from absorbing the sprayed clean water.
Preferably, in step S5, the number of rolling times of the first layer of mixed material road surface is not less than six, and the number of rolling times of the second layer of mixed material road surface is not less than five, where a bump needs to be added to the roller for rolling, so as to improve the rolling effect of the roller.
Preferably, in step S6, during the preliminary maintenance, the spraying is performed continuously, wherein the PH of the water used in the spraying is not lower than seven, and the amount of water sprayed in winter needs to be reduced, the amount of water sprayed in summer needs to be increased, the freezing phenomenon in winter is prevented, and the evaporation in summer is too fast.
Preferably, in step S7, the detection points are controlled to be forty-sixty millimeters, and one detection point is set every six meters on the road surface, and each detection point is measured three times, and the measurement data is averaged to ensure the accuracy of the measurement data.
Preferably, in step S8, the watering amount and frequency are decreased in winter, increased in summer to prevent freezing in winter, and excessive evaporation in summer to fill up the holes in road surface in time to prevent further expansion of the damaged portion.
(III) advantageous effects
Compared with the prior art, the invention provides a cement stabilized macadam pavement construction process, which has the following beneficial effects:
1. according to the cement stabilized macadam pavement construction process, the waste building materials are used for replacing gravels, the building materials are saved, the cost is reduced, meanwhile, the waste steel slag generated by blast furnace steelmaking is utilized, the effects of energy conservation and environmental protection are achieved, waste recycling is achieved, and the development of energy conservation and environmental protection is met.
2. This rubble road surface construction technology is stabilized to cement has improved the bulk strength on road surface through novel mixture, makes the road surface not fragile in the use, and the later maintenance cost reduces, has solved the easy damage in current road surface, and the later maintenance is with high costs problem.
Drawings
FIG. 1 is a schematic flow chart of the process steps of the present invention;
fig. 2 is a schematic cross-sectional view of the pavement structure of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Example 1:
referring to fig. 1, the present embodiment provides a technical solution: a cement stabilized macadam pavement construction process comprises the following steps:
s1, screening and preparing raw materials
Firstly, selecting slag powder, desulfurized gypsum, a composite material, cement, construction waste, sand, water and steel slag micro powder as raw materials, adding the slag powder, the desulfurized gypsum, the composite material and the steel slag micro powder into a ball mill according to the proportion of 23:2.5:4.5:70 for mixing and grinding to obtain a finished product ASSP material, then crushing the construction waste into fragments with the diameter of less than 2.5cm, wherein the sand uses fine sand, the construction solid waste is waste concrete and waste brick slag, the composite material is sodium metaaluminate, the slag powder is S95 granulated blast furnace slag, and the desulfurized gypsum is a ground product of gypsum of a common power plant.
S2, mixing and stirring the raw materials to prepare a mixture
The method comprises the steps of adding an ASSP material, sand, water, building waste fragments and cement into a stirrer in proportion to be mixed and stirred to prepare a mixture, carrying out sampling detection on the content of the building waste fragments in the mixture, wherein the content of the building waste fragments in the mixture is not less than forty percent and not more than sixty percent (specifically 51 percent in the embodiment), transporting the prepared mixture to a paving section within one hour for use, and stirring the mixture regularly in the transportation process to prevent the mixture from being bonded in the transportation process.
S3, pre-paving the mixture and testing the strength
The prepared mixture is paved, rolled and maintained, an experimental road section which is one hundred meters long is paved, then the compactness, the flatness and the compressive strength of the experimental road section are detected, and a pre-paved road section is detected, wherein the compressive strength is not less than 5Mpa, the compactness is not less than ninety-seven percent, and the construction quality of the road section is ensured.
S4 pre-cleaning before pavement paving
Carry out the preliminary treatment to the highway section that needs laid, take out ponding on the road surface, and fill up the hole use grit material on the road surface, guarantee the roughness on road surface, carry out drying process to moist road surface, spray clear water on the road surface before laying, take ponding out through the suction pump, use silt mixture to fill up the road surface simultaneously, and use the rammer compactor to tamp, wherein spray the clear water and should control within the first half hour of laying the mixture, prevent that the road surface from having absorbed the clear water that sprays.
S5 paving road surface by using mixture
The method comprises the steps of pulling a mixture to a road section to be paved by using a dump truck, paving a first layer of the mixture, wherein the paving thickness of the first layer is 10cm, rolling by using a road roller until the first layer of the mixture is leveled, then continuously paving a second layer of the mixture on the first layer of the road surface, wherein the thickness of the second layer of the mixture is 8cm, and rolling by using the road roller until the second layer of the mixture is leveled, the rolling frequency of the first layer of the mixture on the road surface is not lower than six times, the rolling frequency of the second layer of the mixture on the road surface is not lower than five times, wherein a lug is required to be additionally arranged on the rolled road roller, and the rolling effect of the road roller is improved.
S6, carrying out primary maintenance on the formed pavement
The spraying is carried out to the road surface after laying and accomplishing, covers geotechnological cloth on the road surface after the spraying, once sprays the road surface, lasts maintenance ten days according to above-mentioned process, when carrying out preliminary maintenance, needs incessant spraying, and wherein the water PH value that the spraying was used can not be less than seven, need reduce the water spray volume in winter simultaneously, need increase the water spray volume in summer, prevents to take place to freeze the phenomenon winter to and the evaporation in summer is too fast.
S7 Performance test of formed road surface
Sampling and detecting the road sections after the preliminary maintenance is finished, detecting the width, height, flatness, compactness and compressive strength of the road surface, dismantling and reworking the road sections which do not conform to the JTJ034-2000 Standard of construction technical Specifications for road base course construction, controlling the detection points to be forty-sixty millimeters, arranging one detection point on the road surface every six meters, measuring each detection point for three times, averaging the measured data, and ensuring the accuracy of the measured data.
S8, post-maintenance of formed pavement
Sprinkling once to later stage road surface every three to five days, road surface clearance is carried out once every fifteen to twenty days, use the mixture to fill the local use of hollow of appearing, and beat the rammer and level, through watering maintenance, need reduce watering volume and watering frequency winter, need increase watering volume and watering frequency summer, prevent to take place to freeze the phenomenon winter, and the summer evaporation is too fast, when hollow appears in the road surface, need in time fill, prevent that damaged department from further expanding.
After 14 days of maintenance, carrying out quality detection on the road surface after the maintenance in the embodiment, wherein the width of the road surface in the embodiment is 4.5 meters after detection according to JTJ034-2000 technical Specification for construction of road pavement base course; the height is 18 cm; the flatness is 8 mm; the degree of compaction is 99%; the compressive strength is 5 Mpa. All meet the requirements, and other detection indexes also meet the standard requirements
This rubble road surface construction technology is stabilized to cement uses building abandonment material to replace the grit, has saved building material, and the cost is reduced utilizes the abandonment slag that blast furnace steelmaking produced simultaneously, has realized energy-concerving and environment-protective effect to improve the bulk strength on road surface through novel mixture, make the road surface not fragile, later maintenance cost reduces, has solved the easy damage in current road surface, problem that later maintenance cost is high.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The cement stabilized macadam pavement construction process is characterized by comprising the following steps of:
s1, screening and preparing raw materials
Firstly, selecting slag powder, desulfurized gypsum, a composite material, cement, construction waste, sand, water and steel slag micro powder as raw materials, adding the slag powder, the desulfurized gypsum, the composite material and the steel slag micro powder into a ball mill in proportion for mixed grinding to obtain a finished ASSP material, and then crushing the construction waste into fragments, wherein the sand is fine sand, and the water is clear water with the pH value not lower than 4;
s2, mixing and stirring the raw materials to prepare a mixture
Adding the ASSP material, the sand, the water, the fragments of the construction waste and the cement into a stirrer in proportion for mixing and stirring to prepare a mixture, and performing sampling detection on the content of the fragments of the construction waste in the mixture, wherein the content of the fragments of the construction waste in the mixture is not less than forty percent and not more than sixty percent;
s3, pre-paving the mixture and checking the strength
Paving, rolling and maintaining the prepared mixture, paving an experimental road section which is one hundred meters long, and then detecting the compactness, the flatness and the compressive strength of the experimental road section to ensure that the paved road section meets the use standard;
S4, pre-cleaning before paving
The method comprises the following steps of pretreating a road section to be paved, pumping accumulated water on the road surface, filling pits on the road surface to ensure the flatness of the road surface, drying a wet road surface, and spraying clear water on the road surface before paving;
s5, paving the road surface with the mixture
The method comprises the following steps of (1) pulling a mixture to a road section to be paved by using a dump truck, paving a first layer of the mixture, rolling the mixture by using a road roller until the mixture is leveled, continuously paving a second layer of the road surface on the first layer of the road surface, and rolling the mixture by using the road roller until the second layer of the road surface is leveled;
s6, carrying out primary maintenance on the formed pavement
Spraying the surface of the paved road surface, covering geotextile on the sprayed road surface, spraying the road surface for one time, and continuously maintaining for ten days according to the procedures;
s7, Performance test of formed road surface
Sampling and detecting the road sections after the preliminary maintenance is finished, detecting the width, height, flatness, compactness and compressive strength of the road surface, and dismantling and reworking the road sections which do not meet the standard;
s8, post-maintenance of formed pavement
Sprinkling water once every three to five days on the later-stage road surface, cleaning the road surface once every fifteen to twenty days, filling the pits with the mixture, and tamping and leveling the pits by a tamping machine.
2. The process of claim 1, wherein in step S1, the construction solid wastes are waste concrete and/or waste brick residues, the composite material is two or more of silica fume, sodium metaaluminate, sodium sulfate and polymer phosphate, the slag powder is S95 granulated blast furnace slag, and the desulfurized gypsum is ground gypsum of ordinary power plant.
3. The cement stabilized macadam pavement construction process of claim 1, wherein in step S2, the prepared mix needs to be transported to a paving section within one hour after completion, and the mix needs to be stirred periodically during transportation.
4. The cement stabilized macadam pavement construction process of claim 1, wherein in the step S3, the pre-paved section is detected, wherein the compressive strength is not less than 5Mpa, and the compactness is not less than ninety-seven percent.
5. The cement stabilized macadam pavement construction process according to claim 1, wherein in step S4, accumulated water is pumped out through a water pump, the pavement is filled with a sediment mixture, and a tamper is used for tamping, wherein the spraying of clear water should be controlled within the first half hour of laying the mixture.
6. The cement stabilized macadam pavement construction process according to claim 1, wherein in step S5, the number of rolling times of the first layer of mixed material pavement is not less than six, the number of rolling times of the second layer of mixed material pavement is not less than five, and a bump is required to be added to a rolled pavement roller.
7. The process of claim 1, wherein in step S6, the preliminary curing is performed without continuous spraying, wherein the PH of the water used for spraying is not lower than seven, and the amount of water sprayed is reduced in winter and increased in summer.
8. The cement stabilized macadam pavement construction process of claim 1, wherein in step S7, the detection points are controlled to be forty-six millimeters, and are arranged every six meters on the pavement, and each detection point is measured three times, and the measured data is averaged.
9. The process of claim 1, wherein in step S8, the water spraying amount and frequency are decreased in winter, increased in summer and timely filled when potholes occur on the road surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210157479.4A CN114517433A (en) | 2022-02-21 | 2022-02-21 | Cement stabilized macadam pavement construction process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210157479.4A CN114517433A (en) | 2022-02-21 | 2022-02-21 | Cement stabilized macadam pavement construction process |
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| Publication Number | Publication Date |
|---|---|
| CN114517433A true CN114517433A (en) | 2022-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210157479.4A Withdrawn CN114517433A (en) | 2022-02-21 | 2022-02-21 | Cement stabilized macadam pavement construction process |
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| Country | Link |
|---|---|
| CN (1) | CN114517433A (en) |
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2022
- 2022-02-21 CN CN202210157479.4A patent/CN114517433A/en not_active Withdrawn
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Application publication date: 20220520 |