CN110725176A - Cold paving method for asphalt pavement - Google Patents
Cold paving method for asphalt pavement Download PDFInfo
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- CN110725176A CN110725176A CN201911040233.3A CN201911040233A CN110725176A CN 110725176 A CN110725176 A CN 110725176A CN 201911040233 A CN201911040233 A CN 201911040233A CN 110725176 A CN110725176 A CN 110725176A
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- wetting agent
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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
- 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
Abstract
The invention aims to provide a cold paving method of an asphalt pavement, which utilizes the spraying of an asphalt pavement wetting agent, and the wetting agent fully wets the asphalt among cold material particles to form initial viscosity; under the condition of full rolling forming, the particles form a close fit, and the wetting agent is dissolved in the asphalt, so that the asphalt on the surface of the cold asphalt material is mutually fused, the asphalt is solidified along with the drying and volatilization of the wetting agent, the cold asphalt material is more and more firmly adhered, and forms a whole with the asphalt of the original pavement, so that the durability is strong, the traditional heating machine is not needed to be used for hot paving in the paving process, and the paving cost is reduced; the problems that when the existing asphalt pavement has pits, the asphalt pavement needs to be subjected to hot paving, the hot paving process needs more machines and personnel, and the repairing process is troublesome are solved; and the smell of the air is heavy in the laying process, which affects the environment.
Description
Technical Field
The invention belongs to a pavement repairing method, and particularly relates to a cold paving method of an asphalt pavement.
Background
The asphalt is used as a petrochemical leftover material which is easy to store at low temperature, today's permeable asphalt is obtained after formulation recombination, and as the permeable asphalt pavement has the advantages of water permeability, noise reduction, quick pavement and the like, the permeable asphalt pavement has the functions of traffic on the same day of pavement, and the like, and is widely applied to pavement of road pavements. However, the hot paving is needed, so that more machines and personnel are consumed, the smell is heavier during paving, and certain influence is caused on the environment. In the road operation, the construction needs to be carried out on the road surface due to the need of burying a pipe network or modifying road signs, street lamps and the like. On the other hand, a small pit and a small pit are easy to be caused due to construction or vehicle heavy load, trimming and trimming are needed in repair, a hot mix vehicle and a small roller are also needed to be paved, and the constructed road surface has poor compatibility with the original road surface or is uneven due to temperature difference. Particularly, the construction can not be carried out at a lower temperature in the north, small pits can be easily changed into large pits after long-time non-repair, and the conditions of uneven road surface or damage of casualty vehicles and the like can be easily caused.
The asphalt pavement is found to be pitted during driving or walking at ordinary times, so that the situation that people are damaged by vehicles is worried about, and the appearance and the city appearance of the city are influenced. Therefore, a method capable of quickly paving and quickly repairing is needed to be found to solve the problem of repairing the asphalt pavement.
Disclosure of Invention
The invention provides a cold paving method of an asphalt pavement, which solves the problems that when the existing asphalt pavement has pits, hot paving is needed for repairing the asphalt pavement, a hot paving process needs more machines and personnel, and the repairing process is troublesome; and the smell of the air is heavy in the laying process, which affects the environment.
The technical scheme adopted by the invention is as follows:
the cold paving method of the asphalt pavement comprises the following steps:
s1, preparing a granular asphalt cold material by mixing the prefabricated asphalt and the stone particles;
s2, spraying a wetting agent on the road surface to be repaired or the road surface to be paved in a mist mode until the road surface to be repaired is fully wetted;
s3, spraying a wetting agent into the granular asphalt cold material in the step S1 to fully wet and uniformly mix the granular asphalt cold material;
s4, paving the asphalt cold material moistened in the step S2 on the moistened pavement to be repaired or the pavement to be paved at normal temperature;
and S5, rolling the pavement paved with the asphalt cold material to be level with the intact pavement.
The asphalt pavement is found to be pitted during driving or walking at ordinary times, so that the situation that people are damaged by vehicles is worried about, and the appearance of a city are influenced; based on the method, the germination provides a method capable of quickly laying and quickly supplementing, and the problem of life is easily solved; the invention prefabricates the asphalt cold burden landfill material under the condition of not changing the original asphalt pavement material, each type and each asphalt, is convenient to be made into a semi-finished product in advance, is directly used when needed, accelerates the construction progress, reduces the construction period, utilizes the asphalt pavement wetting agent to spray, and the wetting agent fully wets the asphalt among cold burden particles to form initial viscosity; under the condition of full rolling forming, the particles form a close fit, and the wetting agent is dissolved in the asphalt, so that the asphalt on the surface of the cold asphalt material is mutually fused, the asphalt is solidified along with the drying and volatilization of the wetting agent, the cold asphalt material is more and more firmly adhered, and forms a whole with the asphalt of the original pavement, so that the durability is strong, the traditional heating machine is not needed to be used for hot paving in the paving process, and the paving cost is reduced; the problems that when the existing asphalt pavement has pits, the asphalt pavement needs to be subjected to hot paving, the hot paving process needs more machines and personnel, and the repairing process is troublesome are solved; and the smell of the air is heavy in the laying process, which affects the environment.
Preferably, in step S1, the method for preparing the granular asphalt cold material by mixing asphalt with stone particles melts and wraps the asphalt on the surface of the stone particles in a hot-mixing manner, and then cools and scatters the asphalt to form the granular asphalt cold material. The asphalt cold material is prefabricated to form a granular shape, and the asphalt cold material is prefabricated, so that the subsequent processing and the storage are convenient.
Based on the technical preference, the granular asphalt cold burden composition comprises 8 to 15 parts by weight of solid modified asphalt, 78 to 94 parts by weight of stone particles and 1 to 4 parts by weight of accelerator.
Preferably, based on the above technology, the accelerator comprises the following raw materials in parts by weight: 10 to 20 parts of rosin, 15 to 35 parts of PVC plastic, 40 to 60 parts of acrylic acid or ethyl acetate and 10 to 20 parts of ethanol; the raw materials are subjected to closed polymerization for 8-12 hours at the temperature of 55-65 ℃ to prepare the accelerator.
Based on the above technology, the hot-mixing temperature in the hot-mixing mode is 200-300 ℃, and the hot-mixing time is 10-20 minutes.
Based on the technical preference, the wetting agent composition comprises, by weight, 22-42 parts of cyclohexane, 38-58 parts of dimethylbenzene, 10-20 parts of ethanol, 1-4 parts of adhesion promoter and 2-5 parts of quick-drying adhesive.
Based on the technology, the composition of the wetting agent is preferably prepared by mixing the raw materials of the composition and then stirring the mixture for 100 to 140 minutes in a closed environment at normal pressure. The cyclohexane, the dimethylbenzene, the ethanol and the adhesion promoter have the function of fusing the asphalt and are volatile, so that the pavement can be solidified in a short time after being paved and put into use, and the pavement use is not delayed while the paving effect is enhanced; it is highly practical.
Preferably, based on the above-mentioned technique, the road surface to be repaired or the road surface to be paved is dry in step S2.
Based on the above-mentioned technique, it is preferable that the ambient temperature is-30 degrees celsius or higher in the processes of steps S2 to S4. The construction environment temperature requirement is low, the construction can be carried out in the weather from low temperature to normal temperature, and the method is strong in practicability.
The invention has the following advantages and beneficial effects:
1. under the condition that the existing hot-mix asphalt formula is not changed, 8-15 parts of solid modified asphalt, 78-94 parts of stone particles and 1-4 parts of accelerant are adopted to be hot-mixed at 200-300 ℃ and cooled into particle bulk materials, and the bulk materials are packaged into bags; the asphalt cold material landfill material is prefabricated, so that a semi-finished product can be conveniently manufactured in advance and can be directly used when needed, the construction progress is accelerated, and the construction period is shortened; the asphalt wetting agent is matched in construction, the special wetting agent is sprayed in the original road surface and asphalt cold material in a mist form in the process of laying bulk cargo, and the bulk cargo is directly rolled and formed; the temperature difference between the original pavement and the supplementary material is the same in construction, so that no thermal shrinkage expansion factor exists, construction can be carried out on a sunny day within-30 ℃, and the paved pavement is smooth and closely fit with the original pavement; the construction method has the advantages that the construction method has no influence on the environment, the aging is faster and safer, and the safety accidents of scalding personnel are effectively eliminated; two thirds of manpower is reduced in construction; spraying an asphalt pavement wetting agent, wherein the wetting agent fully wets asphalt among cold material particles to form initial viscosity; under the condition of full rolling forming, the particles form a close fit, and the wetting agent is dissolved in the asphalt, so that the asphalt on the surface of the cold asphalt material is mutually fused, the asphalt is solidified along with the drying and volatilization of the wetting agent, the cold asphalt material is more and more firmly adhered, and forms a whole with the asphalt of the original pavement, so that the durability is strong, the traditional heating machine is not needed to be used for hot paving in the paving process, and the paving cost is reduced; the problems that when the existing asphalt pavement has pits, the asphalt pavement needs to be subjected to hot paving, the hot paving process needs more machines and personnel, and the repairing process is troublesome are solved; and the smell of the air is heavy in the laying process, which affects the environment.
2. The invention is under the condition of not changing the original asphalt pavement material, each type and various asphalts, the hot-mixed material is cooled into bulk material, the asphalt between cold material particles is fully wetted by the wetting agent of the asphalt pavement, and initial viscosity is formed; under the condition of full rolling forming, the particles form close fit, and the wetting agent is completely dissolved in the asphalt to form saturated molecules, so that the asphalt is more and more firmly adhered and has strong durability;
3. the asphalt pavement cold paving and cold patching technology belongs to the subject of high polymer materials, is suitable for all asphalt pavements, can be constructed at the temperature of minus 30 ℃, is quick to pave, is simple and quick in cold patching, is low in cost, and is suitable for low-temperature construction; the method has strong demand in each city, and the market prospect is good; the subsequent products are deeply evolved into the cold mixing of the asphalt and the hot mixing, so that the production cost and the environmental cost are lower, and the formed pavement is bonded more firmly and durably.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not used as limitations of the present invention.
It should be understood that the terms first, second, etc. are used merely for distinguishing between descriptions and are not intended to indicate or imply relative importance. Although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments of the present invention.
It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, B exists alone, and A and B exist at the same time, and the term "/and" is used herein to describe another association object relationship, which means that two relationships may exist, for example, A/and B, may mean: a alone, and both a and B alone, and further, the character "/" in this document generally means that the former and latter associated objects are in an "or" relationship.
It is to be understood that in the description of the present invention, the terms "upper", "vertical", "inside", "outside", and the like, refer to an orientation or positional relationship that is conventionally used for placing the product of the present invention, or that is conventionally understood by those skilled in the art, and are used merely for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present invention.
It will be understood that when an element is referred to as being "connected," "connected," or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly adjacent" or "directly coupled" to another element, there are no intervening elements present. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between … …" versus "directly between … …", "adjacent" versus "directly adjacent", etc.).
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, and/or groups thereof.
Example 1:
the embodiment provides a cold paving method of an asphalt pavement, which comprises the following steps:
s1, preparing a granular asphalt cold material by mixing the prefabricated asphalt and the stone particles;
s2, spraying a wetting agent on the road surface to be repaired or the road surface to be paved in a mist mode until the road surface to be repaired is fully wetted;
s3, spraying a wetting agent into the granular asphalt cold material in the step S1 to fully wet and uniformly mix the granular asphalt cold material;
s4, paving the wet asphalt cold material in the step S2 on the wet road surface to be repaired or the road surface to be paved;
and S5, rolling the pavement paved with the asphalt cold material to be level with the intact pavement.
The asphalt pavement is found to be pitted during driving or walking at ordinary times, so that the situation that people are damaged by vehicles is worried about, and the appearance of a city are influenced; based on the method, the germination provides a method capable of quickly laying and quickly supplementing, and the problem of life is easily solved; under the condition that the existing hot-mixed asphalt formula is not changed, the hot-mixed asphalt is hot-mixed at low temperature and cooled into granular bulk materials, and the granular bulk materials are packaged into bags. The asphalt wetting agent is matched in construction, and in the course of laying bulk material, it is sprayed into the original road surface and asphalt cold material by using special wetting agent, and directly rolled to form it, and the large-area construction adopts large-scale mechanical paving and rolling, and the small pit and pit keeper can be directly rolled and flattened by using small car, and has no need of cutting and polishing corner. The temperature difference between the original pavement and the supplementary material is the same in construction, so that no thermal shrinkage expansion factor exists, construction can be carried out on a sunny day at minus 30 ℃, and the paved pavement is smooth and closely fit with the original pavement. The construction method has the advantages that the construction method has no influence on the environment, the aging is faster and safer, and the safety accidents of scalding personnel are effectively eliminated. Two thirds of manpower is reduced in construction.
Preferably, in the step S1, the method for preparing the cold asphalt granular material by mixing asphalt with stone particles melts and wraps the asphalt on the surface of the stone particles in a hot-mixing manner, and then cools and breaks up the asphalt to form the cold asphalt granular material.
Preferably, the granular asphalt cold material composition comprises 8 to 15 parts by weight of solid modified asphalt, 78 to 94 parts by weight of stone particles and 1 to 4 parts by weight of accelerator. The hot-mixing temperature is 200-300 ℃ and the hot-mixing time is 10-20 minutes. In specific implementation, 10 parts of modified asphalt, 88 parts of granular stone and 2 parts of accelerant are selected, stirred at 235 ℃ for 15 minutes, taken out of a pot, cooled into bulk materials, and beaten into 50 kg of bulk materials, and the bulk materials are packaged in a bag. The stone particles adopt the broken gravel standard in JTG F40-2004 Highway asphalt pavement construction technical Specification.
Preferably, the accelerator comprises the following raw materials in parts by weight: 10 to 20 parts of rosin, 15 to 35 parts of PVC plastic, 40 to 60 parts of acrylic acid or ethyl acetate and 10 to 20 parts of ethanol; the accelerator is prepared by carrying out close polymerization on the raw materials for 8-12 hours at the temperature of 55-65 ℃. In the specific implementation, 15 parts of rosin, 25 parts of PVC plastic, 50 parts of acrylic acid or ethyl acetate and 15 parts of ethanol are subjected to closed polymerization for 8-12 hours at the temperature of 60 ℃ plus or minus 5 ℃, and the stretching length of the adhesive is 100 mm. It has adhesive force in asphalt wetting.
Preferably, the composition of the wetting agent comprises, by weight, 22 to 42 parts of cyclohexane, 38 to 58 parts of xylene, 10 to 20 parts of ethanol, 1 to 4 parts of adhesion promoter and 2 to 5 parts of quick-drying adhesive. The composition of the wetting agent is prepared by mixing the raw materials of the composition and then stirring the mixture for 100 to 140 minutes in a closed environment at normal pressure. Preferably, the surface wetting agent (treating agent): 32% of cyclohexane, 48% of dimethylbenzene, 15% of ethanol, 2% of adhesion promoter and 3% of quick-drying adhesive, stirring for 120 minutes at normal pressure and barreling.
Cyclohexane; the product is called hexahydrobenzene, and is colorless liquid with pungent odor; is insoluble in water and soluble in most organic solvents; generally used as a common solvent, a chromatographic analysis standard substance and used for organic synthesis, can be applied to resin, paint, fat and paraffin oil, and can also be used for preparing organic matters such as cyclohexanol, cyclohexanone and the like; the product can be used as solvent for rubber, paint and varnish, diluent for adhesive, and oil extraction agent; because of its low toxicity, it is often used to replace benzene for degreasing, grease removal and paint removal; the product is mainly used for preparing monomer adipic acid, hexamethylene diamine and caprolactam of nylon, and also used as raw materials for preparing cyclohexanol and cyclohexanone; as a diluent for the adhesive in the composition of the wetting agent of the present embodiment;
xylene (dimethylbenzene) as a colorless transparent liquid; the product is a product of which two hydrogens on a benzene ring are substituted by methyl, and has three isomers of ortho, meta and para, and industrially, xylene refers to a mixture of isomers; the product is widely used as a solvent in the industries of paint, resin, dye, printing ink and the like; the product can be used as synthetic monomer or solvent in the industries of medicine, explosive, pesticide, etc.; in the accelerator, xylene and cyclohexane have surface solubility on asphalt, so that the asphalt on the surface of the asphalt cold material is in a softened state, the granular cold materials are mutually extruded to reduce gaps among granules, and the bonding effect is better.
The adhesion promoter directly uses the Istman PP adhesion promoter 343-1, is a modified chlorinated polyolefin product with the solid content of 50 percent, has good adhesion on a PP substrate, and is mainly used as a PP treating agent. PP subjected to primary coating by the Istman PP adhesion promoter has good adhesion to a plurality of coatings and printing ink. The adhesion promoter is used for increasing the surface adhesion effect of the instant adhesive and the asphalt cold material and also increasing the adhesion effect of the asphalt cold material and the original ground, so that the newly-supplemented asphalt cold material is adhered more firmly on the repaired ground.
The quick-drying glue is instant-drying glue, hacker HK-495 quick-drying glue and a rubber metal plastic adhesive can be selected, the parameters of the instant glue are as follows, the types of bonding materials are fiber, stone, metal, wood, ceramic, leather, glass, rubber, cement products and resin glue are classified into epoxy resin glue, hot melt glue type, packaging hot melt glue, shear strength is 8(MPa), effective substance is more than or equal to 99 percent, active service life is 8(min), working temperature is 80 (DEG C), execution standard is 8, CAS is 8, typical viscosity is 8(cps), complete curing time is 0.1(h), viscosity is 8, packaging specification is 20 g/bottle 10 bottles/piece, curing mode is moisture curing, function is bonding, and application range is industrial.
Preferably, in step S2, the pavement to be repaired or the pavement to be paved is dry.
Preferably, in the process of steps S2 to S4, the ambient temperature is-30 degrees Celsius or higher.
In conclusion, the prefabricated asphalt cold material landfill material is convenient to be made into a semi-finished product in advance, can be directly used when needed, accelerates the construction progress and reduces the construction period; the asphalt wetting agent is matched in construction, the special wetting agent is sprayed in the original road surface and asphalt cold material in a mist form in the process of laying bulk cargo, and the bulk cargo is directly rolled and formed; the temperature difference between the original pavement and the supplementary material is the same in construction, so that no thermal shrinkage expansion factor exists, construction can be carried out on a sunny day within-30 ℃, and the paved pavement is smooth and closely fit with the original pavement; the construction method has the advantages that the construction method has no influence on the environment, the aging is faster and safer, and the safety accidents of scalding personnel are effectively eliminated; two thirds of manpower is reduced in construction; spraying an asphalt pavement wetting agent, wherein the wetting agent fully wets asphalt among cold material particles to form initial viscosity; under the condition of full rolling forming, the particles form a close fit, and the wetting agent is dissolved in the asphalt, so that the asphalt on the surface of the cold asphalt material is mutually fused, the asphalt is solidified along with the drying and volatilization of the wetting agent, the cold asphalt material is more and more firmly adhered, and forms a whole with the asphalt of the original pavement, so that the durability is strong, the traditional heating machine is not needed to be used for hot paving in the paving process, and the paving cost is reduced; the problems that when the existing asphalt pavement has pits, the asphalt pavement needs to be subjected to hot paving, the hot paving process needs more machines and personnel, and the repairing process is troublesome are solved; and the smell of the air is heavy in the laying process, which affects the environment.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. The cold paving method of the asphalt pavement is characterized by comprising the following steps of:
s1, preparing a granular asphalt cold material by mixing the prefabricated asphalt and the stone particles;
s2, spraying the wetting agent on the road surface to be repaired or the road surface to be paved in a foggy mode until the road surface to be repaired is fully wetted;
s3, spraying a wetting agent into the granular asphalt cold material in the step S1 to fully wet and uniformly mix the granular asphalt cold material;
s4, paving the wet asphalt cold material in the step S2 on the wet road surface to be repaired or the road surface to be paved;
and S5, rolling the pavement paved with the asphalt cold material to be level with the intact pavement.
2. The cold paving method of asphalt pavement according to claim 1, wherein the method for preparing the granular asphalt cold burden by mixing asphalt with stone particles in step S1 melts and wraps the asphalt on the surface of the stone particles in a hot-mixing manner, and then cools and scatters the asphalt to form the granular asphalt cold burden.
3. The cold paving method for the asphalt pavement according to claim 2, wherein the hot-mixing temperature in the hot-mixing mode is 200-300 ℃, and the hot-mixing time is 10-20 minutes.
4. A cold paving method for asphalt pavement according to claim 2, wherein the composition of the granular asphalt cold material comprises 8-15 parts by weight of solid modified asphalt, 78-94 parts by weight of stone particles and 1-4 parts by weight of accelerator.
5. A cold paving method for an asphalt pavement according to claim 4, wherein the accelerator comprises the following raw materials in parts by weight: 10 to 20 parts of rosin, 15 to 35 parts of PVC plastic, 40 to 60 parts of acrylic acid or ethyl acetate and 10 to 20 parts of ethanol; the accelerator is prepared by polymerizing the raw materials in a sealed manner at the temperature of 55-65 ℃ for 8-12 hours.
6. A cold paving method for an asphalt pavement according to claim 1, wherein the wetting agent composition comprises, by weight, 22 to 42 parts of cyclohexane, 38 to 58 parts of xylene, 10 to 20 parts of ethanol, 1 to 4 parts of adhesion promoter, and 2 to 5 parts of quick-drying adhesive.
7. A cold paving method for an asphalt pavement according to claim 6, wherein the composition of the wetting agent is prepared by mixing the raw materials of the composition and stirring the mixture for 100 to 140 minutes in a closed atmosphere at normal pressure.
8. A method for cold-laying an asphalt pavement according to claim 1, wherein the pavement to be repaired or the pavement to be laid is dry before spraying the wetting agent at step S2.
9. A cold paving method of an asphalt pavement according to claim 1, wherein the ambient temperature is above-30 ℃ during the steps S2-S4.
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