CN110939034B - Asphalt concrete pavement construction method - Google Patents
Asphalt concrete pavement construction method Download PDFInfo
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- CN110939034B CN110939034B CN201911146110.8A CN201911146110A CN110939034B CN 110939034 B CN110939034 B CN 110939034B CN 201911146110 A CN201911146110 A CN 201911146110A CN 110939034 B CN110939034 B CN 110939034B
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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
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- 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
- E01C7/26—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre
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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
- E01C7/26—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre
- E01C7/262—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre with fibrous material, e.g. asbestos; with animal or vegetal admixtures, e.g. leather, cork
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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
- E01C7/26—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre
- E01C7/265—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre with rubber or synthetic resin, e.g. with rubber aggregate, with synthetic resin binder
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention relates to the field of highway pavement construction, in particular to a construction method of an asphalt concrete pavement, which comprises the following steps: s1, base layer processing: the surface of the pavement is manually cleaned, so that the pavement is dry and clean and has no loose stones, dust and impurities; s2, preparing an asphalt concrete material; s3, paving: paving the asphalt concrete material prepared in the step 2 in a ladder formation manner by 2 paving machines; the distance range of the front and the rear 2 spreading machine positions is 15-20m, the spreading speed is 3.5m/min, and a pavement layer is prepared; s4, compacting: carrying out three working procedures of initial pressing, secondary pressing and final pressing; during initial pressing, a road roller is used for carrying out static pressure on the road surface layer prepared in the step S3, and then vibration pressing is carried out on the road surface layer; secondly, the pavement layer is subjected to compounding; and finally, performing final pressing on the pavement layer to obtain the asphalt concrete pavement layer. The asphalt concrete pavement layer prepared by the method has the advantage of higher structural strength.
Description
Technical Field
The invention relates to the technical field of highway pavement construction, in particular to a construction method of an asphalt concrete pavement.
Background
A highway pavement is a surface in direct contact with an urban vehicle, primarily intended to carry the weight of the vehicle.
In order to ensure stable operation of the urban transportation means, the road surface is generally required to be kept relatively flat, and if the road surface is not flat, the urban transportation means is prone to bumping, and the operation speed of the urban transportation means is severely limited.
Although the road surface can be flattened during construction, after the road surface is used for a long time, the structure of the road surface is extruded for a long time, so that the damage of the road surface structure is easy to occur, and the road surface is uneven.
Disclosure of Invention
The invention aims to provide a construction method of an asphalt concrete pavement, and the prepared asphalt concrete pavement has the advantage of higher structural strength.
In order to achieve the purpose, the invention provides the following technical scheme:
a construction method of an asphalt concrete pavement comprises the following steps:
s1, base layer processing: the surface of the pavement is manually cleaned, so that the pavement is dry and clean and has no loose stones, dust and impurities;
s2, preparing an asphalt concrete material;
s3, paving: paving the asphalt concrete material prepared in the step 2 in a ladder formation manner by 2 paving machines; the distance range of the front and the rear 2 spreading machine positions is 15-20m, the spreading speed is 3.5m/min, and a pavement layer is prepared;
s4, compacting: carrying out three working procedures of initial pressing, secondary pressing and final pressing; during primary pressing, a road roller is used for carrying out static pressure on the road surface layer prepared by the S3 firstly, then the road surface layer is vibrated, and the temperature of the primary pressing is controlled at 128-135 ℃; secondly, repressing the pavement layer, wherein the repressing temperature is controlled at 110-118 ℃; and finally, performing final pressing on the pavement layer, wherein the temperature of the final pressing is controlled to be 100-105 ℃, so that the asphalt concrete pavement layer is prepared.
By adopting the technical scheme, in the process of road surface construction, the distance range of the front and rear 2 paver stations in the step S3 is 15-20m, so that the road surface layer is not easy to separate and longitudinally joint; the paving speed is controlled to be 3.5m/min, so that the asphalt concrete material can be uniformly paved on a base layer, and the working efficiency of the paver is improved; the primary pressing process has a leveling effect on the pavement layer, and the asphalt concrete material can better cover the base layer; the re-pressing process is matched with a specific re-pressing temperature, so that the asphalt concrete material is more compact, the combination between the asphalt concrete material and the base layer is more stable, and the anti-aging performance of the pavement layer can be enhanced; the final pressing procedure is matched with a specific final pressing temperature, so that the prepared pavement layer is higher in flatness; the pavement is beneficial to improving the structural strength of the prepared pavement layer through base layer treatment, asphalt concrete material preparation, paving and compacting procedures and specific operating conditions in the paving and compacting procedures, so that the pavement can still keep better structural strength after long-term use.
Further, in step S4, a vibratory roller is used to apply a vibratory pressure to the pavement, wherein the vibratory frequency of the vibratory pressure is in the range of 45 to 48 Hz.
By adopting the technical scheme, the vibratory roller vibrates and presses the pavement layer, and the specific vibration frequency range is selected, so that the structural strength of the compacted pavement layer is improved.
Further, in the step S2, the asphalt concrete material includes the following components in parts by weight:
90-98 parts of asphalt;
30-40 parts of Portland cement;
20-30 parts of water;
40-60 parts of rubber powder;
15-23 parts of river sand;
21-35 parts of pottery sand;
18-25 parts of ceramsite
5-8 parts of terpene resin;
2-8 parts of aluminum oxide;
2-5 parts of steel fiber;
18-25 parts of straw powder.
Further, the asphalt concrete material comprises the following components in parts by weight:
95 parts of asphalt;
36 parts of Portland cement;
30 parts of water;
52 parts of rubber powder;
18 parts of river sand;
32 parts of pottery sand;
25 parts of ceramsite
8 parts of terpene resin;
8 parts of aluminum oxide;
4 parts of steel fiber;
25 parts of straw powder.
By adopting the technical scheme, the asphalt and the portland cement are main components of the asphalt concrete, and the addition of the rubber powder is beneficial to improving the toughness and the crack resistance of an asphalt concrete raw material system and improving the structural strength in the asphalt concrete; the addition of the terpene resin is beneficial to enhancing the cohesive force in an asphalt concrete raw material system on one hand and is beneficial to ensuring the anti-aging performance of the asphalt concrete material on the other hand; the straw ash plays a skeleton role in the asphalt concrete raw material, and is beneficial to improving the overall strength of the asphalt concrete raw material system.
Further, the straw powder is modified straw, and the preparation method of the modified straw comprises the following steps: adding 3-20 parts by weight of epoxy acrylic resin, 75-95 parts by weight of straw powder and 2-20 parts by weight of maleic anhydride into a high-speed mixer, stirring at a high speed of 1500-jar stirring at 2500r/min for 15-35min, discharging the materials into a cold mixer when the temperature reaches 150-jar stirring at 155 ℃, mixing at a speed of 300-jar stirring at 450r/min, cooling to 30-40 ℃, and discharging to obtain the modified straw powder.
Further, the mesh number of the modified straw powder is 60-100 meshes.
By adopting the technical scheme, the mesh number of the modified straw powder is controlled to be 60-100 meshes, so that the modified straw powder can be uniformly mixed in a raw material system of the asphalt concrete, and the integral structural strength of the asphalt concrete is favorably improved.
Further, the rubber powder is waste rubber powder, the waste rubber powder is derived from waste tires of automobiles, and the mesh number of the rubber powder is controlled to be 300-400 meshes.
By adopting the technical scheme, the rubber powder is derived from waste tires of automobiles, and is beneficial to meeting the requirement of environmental protection; meanwhile, the mesh number of the rubber powder is controlled to be between 300 meshes and 400 meshes, so that the rubber powder can be filled in gaps between the portland cement and the ceramsite, and the strength and the durability of the prepared pavement layer are improved.
Further, the asphalt concrete material also comprises the following components in parts by weight:
1-1.5 parts of a water reducing agent.
Further, the water reducing agent is calcium lignosulfonate and sodium lignosulfonate in a weight ratio of 1: 1.3-1.5.
By adopting the technical scheme, the compound of the calcium lignosulfonate and the sodium lignosulfonate in a specific ratio has an obvious water reducing effect in a raw material system, and in the ratio interval of the calcium lignosulfonate and the sodium lignosulfonate, the sodium lignosulfonate has a stronger auxiliary plasticizing effect on the raw material system along with the gradual increase of the content of the sodium lignosulfonate, so that the structural strength of a pavement layer prepared in a later period is favorably improved.
Further, the preparation method of the asphalt concrete material comprises the following steps:
A. adding asphalt in corresponding weight parts into a reaction kettle, stirring and heating to 155-160 ℃ to prepare asphalt slurry;
B. mixing water and cement in corresponding weight portions, and stirring for 40-60min at a stirring speed of 30-50r/min to obtain cement slurry; C. and (3) adding river sand, ceramic sand, aluminum oxide, steel fibers, straw powder and a water reducing agent in corresponding parts by weight into the cement slurry, heating to 30 ℃, stirring for 20-35min, and adding the asphalt slurry prepared in the step (A) to prepare the asphalt concrete.
In conclusion, the invention has the following beneficial effects:
1. in the process of road surface construction, the distance range of the front and rear 2 paver positions in the step S3 is 15-20m, so that the road surface layer is not easy to separate and longitudinally slit; the paving speed is controlled to be 3.5m/min, so that the asphalt concrete material can be uniformly paved on a base layer, and the working efficiency of the paver is improved; the primary pressing process has a leveling effect on the pavement layer, and the asphalt concrete material can better cover the base layer; the re-pressing process is matched with a specific re-pressing temperature, so that the asphalt concrete material is more compact, the combination between the asphalt concrete material and the base layer is more stable, and the anti-aging performance of the pavement layer can be enhanced; the final pressing procedure is matched with a specific final pressing temperature, so that the prepared pavement layer is higher in flatness; the pavement is beneficial to improving the structural strength of the prepared pavement layer through base layer treatment, asphalt concrete material preparation, paving and compacting procedures and specific operating conditions in the paving and compacting procedures, so that the pavement can still keep better structural strength after long-term use.
2. The asphalt and the portland cement are main components of the asphalt concrete, and the addition of the rubber powder is beneficial to improving the toughness and the crack resistance of an asphalt concrete raw material system and improving the structural strength in the asphalt concrete; the addition of the terpene resin is beneficial to enhancing the cohesive force in an asphalt concrete raw material system on one hand and is beneficial to ensuring the anti-aging performance of the asphalt concrete material on the other hand; the straw ash plays a skeleton role in the asphalt concrete raw material, and is beneficial to improving the overall strength of the asphalt concrete raw material system.
3. The mesh number of the modified straw powder is controlled to be 60-100 meshes, so that the modified straw powder can be uniformly mixed in a raw material system of the asphalt concrete, and the integral structural strength of the asphalt concrete is favorably improved.
Drawings
FIG. 1 is a schematic flow chart of the asphalt concrete pavement construction method of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1
A method for constructing an asphalt concrete pavement, referring to fig. 1, comprising the following steps:
s1, base layer processing: the surface of the pavement is manually cleaned, so that the pavement is dry and clean and has no loose stones, dust and impurities;
s2, preparing an asphalt concrete material;
s3, paving: paving the asphalt concrete material prepared in the step 2 in a ladder formation manner by 2 paving machines; the distance range of the front and the rear 2 spreading machine positions is 15m, the spreading speed is 3.5m/min, and a pavement layer is prepared;
s4, compacting: carrying out three working procedures of initial pressing, secondary pressing and final pressing; during primary pressing, a road roller is used for carrying out static pressure on the road surface layer prepared by the S3 firstly, then vibration pressing is carried out on the road surface layer, and the temperature of the primary pressing is controlled at 128 ℃; secondly, repressing the pavement layer, wherein the repressing temperature is controlled at 110 ℃; and finally, performing final pressing on the pavement layer, wherein the temperature of the final pressing is controlled at 100 ℃, so that the asphalt concrete pavement layer is prepared.
The components and parts by weight of the asphalt concrete material are shown in table 1.
The preparation method of the asphalt concrete material comprises the following steps:
A. adding asphalt in corresponding weight portions into a reaction kettle, stirring and heating to 155 ℃ to obtain asphalt slurry.
B. And (3) mixing the water and the cement in the corresponding weight parts, and stirring for 40min at the stirring speed of 30r/min to obtain cement slurry.
C. And (3) adding river sand, ceramic sand, aluminum oxide, steel fibers and straw powder in corresponding parts by weight into the cement slurry, heating to 25 ℃, stirring for 20min, and adding the asphalt slurry prepared in the step (A) to prepare the asphalt concrete.
Example 2
The construction method of the asphalt concrete pavement is different from the embodiment 1 in that:
s1, base layer processing: the surface of the pavement is manually cleaned, so that the pavement is dry and clean and has no loose stones, dust and impurities;
s2, preparing an asphalt concrete material;
s3, paving: paving the asphalt concrete material prepared in the step 2 in a ladder formation manner by 2 paving machines; the distance range of the front and the rear 2 paver positions is 18m, the paving speed is 3.5m/min, and a pavement layer is prepared;
s4, compacting: carrying out three working procedures of initial pressing, secondary pressing and final pressing; during primary pressing, a road roller is used for carrying out static pressure on the road surface layer prepared by the S3 firstly, then vibration pressing is carried out on the road surface layer, and the temperature of the primary pressing is controlled at 130 ℃; secondly, repressing the pavement layer, wherein the repressing temperature is controlled at 115 ℃; and finally, performing final pressing on the pavement layer, wherein the temperature of the final pressing is controlled at 103 ℃, so that the asphalt concrete pavement layer is prepared.
In step S4, a vibratory roller is used for vibrating and pressing the pavement layer, and the vibration frequency range of the vibration and pressing is 45 Hz.
The components and parts by weight of the asphalt concrete material are shown in table 1.
The preparation method of the asphalt concrete material comprises the following steps:
A. adding asphalt in corresponding weight portions into a reaction kettle, stirring and heating to 158 ℃ to obtain asphalt slurry.
B. And (3) mixing the water and the cement in corresponding parts by weight, and stirring for 50min at the stirring speed of 40r/min to obtain cement slurry.
C. And (3) adding river sand, ceramic sand, aluminum oxide, steel fibers and straw powder in corresponding parts by weight into the cement slurry, heating to 28 ℃, stirring for 30min, and adding the asphalt slurry prepared in the step (A) to prepare the asphalt concrete.
Example 3
The construction method of the asphalt concrete pavement is different from the embodiment 1 in that:
s1, base layer processing: the surface of the road surface is manually cleaned, so that the road surface is dry and clean and has no loose stones, dust and impurities.
And S2, preparing the asphalt concrete material.
S3, paving: paving the asphalt concrete material prepared in the step 2 in a ladder formation manner by 2 paving machines; the distance range of the front and the rear 2 spreading machine positions is 20m, the spreading speed is 3.5m/min, and a pavement layer is prepared.
S4, compacting: carrying out three working procedures of initial pressing, secondary pressing and final pressing; during primary pressing, a road roller is used for carrying out static pressure on the road surface layer prepared by the S3 firstly, then vibration pressing is carried out on the road surface layer, and the temperature of the primary pressing is controlled at 135 ℃; secondly, repressing the pavement layer, wherein the repressing temperature is controlled at 118 ℃; and finally, performing final pressing on the pavement layer, wherein the temperature of the final pressing is controlled at 105 ℃, so that the asphalt concrete pavement layer is prepared.
In step S4, a vibratory roller is used for vibrating and pressing the pavement layer, and the vibration frequency range of the vibration and pressing is 47 Hz.
The components and parts by weight of the asphalt concrete material are shown in table 1.
The preparation method of the asphalt concrete material comprises the following steps:
A. adding asphalt in corresponding weight portions into a reaction kettle, stirring and heating to 160 ℃ to obtain asphalt slurry.
B. And (3) mixing the water and the cement in the corresponding weight parts, and stirring for 60min at the stirring speed of 50r/min to obtain cement slurry.
C. And (3) adding river sand, ceramic sand, aluminum oxide, steel fibers and straw powder in corresponding parts by weight into the cement slurry, heating to 30 ℃, stirring for 35min, and adding the asphalt slurry prepared in the step (A) to prepare the asphalt concrete.
Example 4
The construction method of the asphalt concrete pavement is different from the embodiment 2 in that:
s1, base layer processing: the surface of the pavement is manually cleaned, so that the pavement is dry and clean and has no loose stones, dust and impurities;
s2, preparing an asphalt concrete material;
s3, paving: paving the asphalt concrete material prepared in the step 2 in a ladder formation manner by 2 paving machines; the distance range of the front and the rear 2 spreading machine positions is 17m, the spreading speed is 3.5m/min, and a pavement layer is prepared;
s4, compacting: carrying out three working procedures of initial pressing, secondary pressing and final pressing; during primary pressing, a road roller is used for carrying out static pressure on the road surface layer prepared by the S3 firstly, then vibration pressing is carried out on the road surface layer, and the temperature of the primary pressing is controlled at 133 ℃; secondly, repressing the pavement layer, wherein the repressing temperature is controlled at 114 ℃; and finally, performing final pressing on the pavement layer, wherein the temperature of the final pressing is controlled at 102 ℃, so that the asphalt concrete pavement layer is prepared.
In step S4, a vibratory roller is used for vibrating and pressing the pavement layer, and the vibration frequency range of the vibration and pressing is 48 Hz.
The components and parts by weight of the asphalt concrete material are shown in table 1.
The preparation method of the asphalt concrete material comprises the following steps:
A. adding asphalt in corresponding weight portions into a reaction kettle, stirring and heating to 160 ℃ to obtain asphalt slurry.
B. And (3) mixing the water and the cement in the corresponding weight parts, and stirring for 60min at the stirring speed of 50r/min to obtain cement slurry.
C. And (3) adding river sand, ceramic sand, aluminum oxide, steel fibers and straw powder in corresponding parts by weight into the cement slurry, heating to 30 ℃, stirring for 35min, and adding the asphalt slurry prepared in the step (A) to prepare the asphalt concrete.
The straw powder is modified straw, and the components and the parts by weight of the raw materials for preparing the modified straw are shown in table 2. The preparation method of the modified straw comprises the following steps: adding epoxy acrylic resin in corresponding weight parts, straw powder in corresponding weight parts and maleic anhydride in corresponding weight parts into a high-speed mixer, stirring at a high speed of 1500r/min for 15min, discharging the materials into a cold mixer when the temperature reaches 150 ℃, mixing at a speed of 300r/min, cooling to 30 ℃, and discharging to obtain the modified straw powder.
Example 5
The construction method of the asphalt concrete pavement is different from the embodiment 4 in that:
the components and parts by weight of the asphalt concrete material are shown in table 1.
The preparation method of the asphalt concrete material comprises the following steps:
A. adding asphalt in corresponding weight portions into a reaction kettle, stirring and heating to 160 ℃ to obtain asphalt slurry.
B. And (3) mixing the water and the cement in the corresponding weight parts, and stirring for 60min at the stirring speed of 50r/min to obtain cement slurry.
C. And (3) adding river sand, ceramic sand, aluminum oxide, steel fibers and straw powder in corresponding parts by weight into the cement slurry, heating to 30 ℃, stirring for 35min, and adding the asphalt slurry prepared in the step (A) to prepare the asphalt concrete.
The straw powder is modified straw, and the components and the parts by weight of the raw materials for preparing the modified straw are shown in table 2. The preparation method of the modified straw comprises the following steps: adding epoxy acrylic resin in corresponding weight parts, straw powder in corresponding weight parts and maleic anhydride in corresponding weight parts into a high-speed mixer, stirring at a high speed of 2000r/min for 25min, discharging the materials into a cold mixer when the temperature reaches 153 ℃, mixing at a speed of 350r/min, cooling to 35 ℃, and discharging to obtain the modified straw powder.
In this example, the modified straw powder had a mesh size of 60 mesh.
Example 6
An asphalt concrete pavement construction method is different from the embodiment 5 in that:
the components and parts by weight of the asphalt concrete material are shown in table 1.
The preparation method of the asphalt concrete material comprises the following steps:
A. adding asphalt in corresponding weight portions into a reaction kettle, stirring and heating to 160 ℃ to obtain asphalt slurry.
B. And (3) mixing the water and the cement in corresponding parts by weight, and stirring for 55min at a stirring speed of 45r/min to obtain cement slurry.
C. And (3) adding river sand, ceramic sand, aluminum oxide, steel fibers and straw powder in corresponding parts by weight into the cement slurry, heating to 30 ℃, stirring for 35min, and adding the asphalt slurry prepared in the step (A) to prepare the asphalt concrete.
The straw powder is modified straw, and the components and the parts by weight of the raw materials for preparing the modified straw are shown in table 2. The preparation method of the modified straw comprises the following steps: adding epoxy acrylic resin in corresponding weight parts, straw powder in corresponding weight parts and maleic anhydride in corresponding weight parts into a high-speed mixer, stirring at a high speed of 2500r/min for 35min, discharging the materials into a cold mixer when the temperature reaches 155 ℃, mixing at a speed of 450r/min, cooling to 40 ℃, and discharging to obtain the modified straw powder.
In this example, the modified straw powder had a mesh size of 80 mesh.
In the embodiment, the rubber powder is waste rubber powder, the waste rubber powder is derived from waste tires of automobiles, and the mesh number of the rubber powder is controlled to be 300 meshes.
Example 7
An asphalt concrete pavement construction method is different from the embodiment 6 in that:
the components and parts by weight of the asphalt concrete material are shown in table 1.
The preparation method of the asphalt concrete material comprises the following steps:
A. adding asphalt in corresponding weight portions into a reaction kettle, stirring and heating to 160 ℃ to obtain asphalt slurry.
B. And (3) mixing the water and the cement in the corresponding weight parts, and stirring for 60min at the stirring speed of 50r/min to obtain cement slurry.
C. And (3) adding river sand, ceramic sand, aluminum oxide, steel fibers, straw powder and a water reducing agent in corresponding parts by weight into the cement slurry, heating to 30 ℃, stirring for 30min, and adding the asphalt slurry prepared in the step (A) to prepare the asphalt concrete.
The straw powder is modified straw, and the components and the parts by weight of the raw materials for preparing the modified straw are shown in table 2. The preparation method of the modified straw comprises the following steps: adding epoxy acrylic resin in corresponding weight parts, straw powder in corresponding weight parts and maleic anhydride in corresponding weight parts into a high-speed mixer, stirring at a high speed of 2500r/min for 30min, discharging the materials into a cold mixer when the temperature reaches 155 ℃, mixing at a speed of 450r/min, cooling to 40 ℃, and discharging to obtain the modified straw powder.
In this example, the modified straw powder had a mesh size of 100 mesh.
In the embodiment, the rubber powder is waste rubber powder, the waste rubber powder is derived from waste tires of automobiles, and the mesh number of the rubber powder is controlled to be 350 meshes.
Example 8
An asphalt concrete pavement construction method is different from the embodiment 7 in that:
the components and parts by weight of the asphalt concrete material are shown in table 1.
The preparation method of the asphalt concrete material comprises the following steps:
A. adding asphalt in corresponding weight portions into a reaction kettle, stirring and heating to 160 ℃ to obtain asphalt slurry.
B. And (3) mixing the water and the cement in the corresponding weight parts, and stirring for 60min at the stirring speed of 50r/min to obtain cement slurry.
C. And (3) adding river sand, ceramic sand, aluminum oxide, steel fibers, straw powder and a water reducing agent in corresponding parts by weight into the cement slurry, heating to 30 ℃, stirring for 35min, and adding the asphalt slurry prepared in the step (A) to prepare the asphalt concrete.
The straw powder is modified straw, and the components and the parts by weight of the raw materials for preparing the modified straw are shown in table 2. The preparation method of the modified straw comprises the following steps: adding epoxy acrylic resin in corresponding weight parts, straw powder in corresponding weight parts and maleic anhydride in corresponding weight parts into a high-speed mixer, stirring at a high speed of 2500r/min for 35min, discharging the materials into a cold mixer when the temperature reaches 155 ℃, mixing at a speed of 450r/min, cooling to 40 ℃, and discharging to obtain the modified straw powder.
In this example, the modified straw powder had a mesh size of 70 mesh.
The rubber powder is waste rubber powder, the waste rubber powder is derived from waste tires of automobiles, and the mesh number of the rubber powder is controlled to be 400 meshes.
In this embodiment, the water reducing agent is a mixture of calcium lignosulfonate and sodium lignosulfonate in a weight ratio of 1: 1.3 of the composition.
Example 9
An asphalt concrete pavement construction method is different from the embodiment 8 in that:
the components and parts by weight of the asphalt concrete material are shown in table 1.
The preparation method of the asphalt concrete material comprises the following steps:
A. adding asphalt in corresponding weight portions into a reaction kettle, stirring and heating to 160 ℃ to obtain asphalt slurry.
B. And (3) mixing the water and the cement in the corresponding weight parts, and stirring for 60min at the stirring speed of 50r/min to obtain cement slurry.
C. And (3) adding river sand, ceramic sand, aluminum oxide, steel fibers, straw powder and a water reducing agent in corresponding parts by weight into the cement slurry, heating to 30 ℃, stirring for 35min, and adding the asphalt slurry prepared in the step (A) to prepare the asphalt concrete.
The straw powder is modified straw, and the components and the parts by weight of the raw materials for preparing the modified straw are shown in table 2. The preparation method of the modified straw comprises the following steps: adding epoxy acrylic resin in corresponding weight parts, straw powder in corresponding weight parts and maleic anhydride in corresponding weight parts into a high-speed mixer, stirring at a high speed of 2400r/min for 30min, discharging the materials into a cold mixer when the temperature reaches 155 ℃, mixing at a speed of 400r/min, cooling to 40 ℃, and discharging to obtain the modified straw powder.
In this example, the modified straw powder had a mesh size of 60 mesh.
In the embodiment, the rubber powder is waste rubber powder, the waste rubber powder is derived from waste tires of automobiles, and the mesh number of the rubber powder is controlled to be 320 meshes.
In this embodiment, the water reducing agent is a mixture of calcium lignosulfonate and sodium lignosulfonate in a weight ratio of 1: 1.4 of the composition.
Example 10
An asphalt concrete pavement construction method is different from the embodiment 9 in that:
the components and parts by weight of the asphalt concrete material are shown in table 1.
The preparation method of the asphalt concrete material comprises the following steps:
A. adding asphalt in corresponding weight portions into a reaction kettle, stirring and heating to 160 ℃ to obtain asphalt slurry.
B. And (3) mixing the water and the cement in the corresponding weight parts, and stirring for 60min at the stirring speed of 50r/min to obtain cement slurry.
C. And (3) adding river sand, ceramic sand, aluminum oxide, steel fibers, straw powder and a water reducing agent in corresponding parts by weight into the cement slurry, heating to 30 ℃, stirring for 35min, and adding the asphalt slurry prepared in the step (A) to prepare the asphalt concrete.
The straw powder is modified straw, and the components and the parts by weight of the raw materials for preparing the modified straw are shown in table 2. Adding epoxy acrylic resin in corresponding weight parts, straw powder in corresponding weight parts and maleic anhydride in corresponding weight parts into a high-speed mixer, stirring at a high speed of 2500r/min for 35min, discharging the materials into a cold mixer when the temperature reaches 155 ℃, mixing at a speed of 450r/min, cooling to 40 ℃, and discharging to obtain the modified straw powder.
In this example, the modified straw powder had a mesh size of 90 mesh.
In the embodiment, the rubber powder is waste rubber powder, the waste rubber powder is derived from waste tires of automobiles, and the mesh number of the rubber powder is controlled to be 350 meshes.
In this embodiment, the water reducing agent is calcium lignosulfonate and sodium lignosulfonate in a weight ratio of 1: 1.5 of the composition.
Table 1 components of the asphalt concrete material and parts by weight thereof.
Table 2 components of raw materials for preparing the modified straw powder and parts by weight thereof.
Comparative example 1
An asphalt concrete pavement construction method is different from the embodiment 10 in that: in step S4, a vibratory roller is used for vibrating and pressing the pavement layer, and the vibration frequency range of the vibration and pressing is 40 Hz.
Comparative example 2
An asphalt concrete pavement construction method is different from the embodiment 10 in that: in step S4, a vibratory roller is used for vibrating and pressing the pavement layer, and the vibration frequency range of the vibration and pressing is 40 Hz.
Comparative example 3
An asphalt concrete pavement construction method is different from the embodiment 10 in that: in step S4, only the static pressure step is used in the preliminary pressure step.
Comparative example 4
An asphalt concrete pavement construction method is different from the embodiment 10 in that: in the asphalt concrete material, the water reducing agent is calcium lignosulphonate.
Comparative example 5
An asphalt concrete pavement construction method is different from the embodiment 10 in that: the asphalt concrete material is not added with straw powder.
Comparative example 6
An asphalt concrete pavement construction method is different from the embodiment 10 in that: in the asphalt concrete material, the straw powder is not modified.
Comparative example 7
An asphalt concrete pavement construction method is different from the embodiment 10 in that: in the asphalt concrete material, the mesh number of the straw powder is 50 meshes.
Comparative example 8
An asphalt concrete pavement construction method is different from the embodiment 10 in that: the components of the asphalt concrete material and the parts by weight thereof are shown in table a.
Table a.
Experiment 1
The samples of the asphalt concrete road surfaces prepared by the preparation methods of examples 1 to 10 and comparative examples 1 to 8 were tested for 28d compressive strength (MPa) according to GB/T50081-2002 standard for testing mechanical properties of general concrete, and the relevant test data were recorded in table 3.
Table 3 examples 1 to 10 and comparative examples 1 to 8 were subjected to the test data of experiment 1.
According to the data of examples 1 to 3 and comparative examples 1 to 3 in table 3, when the vibration frequency is too low, the void ratio in the asphalt concrete material is increased, and the compressive strength of the asphalt concrete pavement layer is easy to be smaller; when the vibration frequency is too high, the mineral aggregate in the asphalt concrete material is easily crushed, so that the compactness of the asphalt concrete material is reduced, and the compressive strength of the asphalt concrete pavement layer is reduced. In the initial pressing process, only the step of static pressing is performed, and the compactness and the compressive strength of the pavement layer after the static pressing are inferior to those of the pavement layer after the step of static pressing and the step of vibration pressing. In the process of initial pressure, adopt static pressure and the cooperation of pressure process that shakes, and the pressure in-process that shakes chooses for use to shake the frequency and be 47Hz, have very big reinforcing effect to the closely knit degree and the compressive strength of asphalt concrete pavement layer.
According to the data of the examples 4-5 and the comparative examples 4-6 in the table 3, the modified straw powder can be uniformly mixed in the raw material system of the asphalt concrete when the modified straw powder is added and the mesh number of the modified straw powder is 80 meshes, so that the overall structural strength of the asphalt concrete can be improved.
According to the data of the example 6 in the table 3, the rubber powder is added to fill the gap between the portland cement and the ceramsite, so that the strength and the durability of the prepared pavement layer are improved, and the rubber powder is derived from waste tires, so that the environmental protection requirement is met.
From the data of examples 7 to 9 and comparative example 7 in table 3, it can be seen that the water reducing agent is prepared by mixing calcium lignosulfonate and sodium lignosulfonate in a weight ratio of 1: 1.4, the compressive strength of the concrete pavement layer is relatively high, which shows that the compounding of the calcium lignosulfonate and the sodium lignosulfonate in a specific proportion has an obvious water reducing effect in a raw material system, and in the proportion interval of the calcium lignosulfonate and the sodium lignosulfonate, the sodium lignosulfonate has a stronger auxiliary plasticizing effect on the raw material system along with the gradual increase of the content of the sodium lignosulfonate, so that the structural strength of the prepared pavement layer is favorably improved.
As can be seen from the data of examples 10 and comparative example 8 in table 3, the compressive strength of the asphalt concrete pavement layer prepared by blending the specific asphalt concrete material is higher than that of examples 1 to 9 and comparative example 8, which indicates that the structural strength of the prepared asphalt concrete pavement layer can be better improved by blending asphalt, portland cement, water, rubber powder, river sand, ceramic sand, ceramsite, terpene resin, alumina, steel fiber, straw powder and water reducing agent in specific weight parts.
To sum up, the combination of the specific proportion of the asphalt concrete material and the construction method can greatly improve the compressive strength of the asphalt concrete, and greatly improve the structure of the prepared asphalt concrete pavement layer, so that the asphalt pavement layer is still not easy to damage after being used for a long time, and the asphalt concrete pavement layer is kept flat.
The above-mentioned embodiments are merely illustrative and not restrictive, and those skilled in the art can make modifications to the embodiments without inventive contribution as required after reading the present specification, but only protected by the patent laws within the scope of the claims.
Claims (6)
1. A construction method of an asphalt concrete pavement is characterized by comprising the following steps: the method comprises the following steps:
s1, base layer processing: the surface of the pavement is manually cleaned, so that the pavement is dry and clean and has no loose stones, dust and impurities;
s2, preparing an asphalt concrete material; the asphalt concrete material comprises the following components in parts by weight:
95 parts of asphalt;
36 parts of Portland cement;
30 parts of water;
52 parts of rubber powder;
18 parts of river sand;
32 parts of pottery sand;
25 parts of ceramsite
8 parts of terpene resin;
8 parts of aluminum oxide;
4 parts of steel fiber;
25 parts of straw powder; the straw powder is modified straw, and the preparation method of the modified straw comprises the following steps: adding 3-20 parts by weight of epoxy acrylic resin, 75-95 parts by weight of straw powder and 2-20 parts by weight of maleic anhydride into a high-speed mixer, stirring at a high speed of 1500-2500r/min for 15-35min, discharging the materials into a cold mixer when the temperature reaches 150-155 ℃, mixing at a speed of 300-450r/min, cooling to 30-40 ℃, and discharging to obtain modified straw powder; the mesh number of the modified straw powder is 60-100 meshes;
s3, paving: paving the asphalt concrete material prepared in the step 2 in a ladder formation manner by 2 paving machines; the distance range of the front and the rear 2 spreading machine positions is 15-20m, the spreading speed is 3.5m/min, and a pavement layer is prepared;
s4, compacting: carrying out three working procedures of initial pressing, secondary pressing and final pressing; during primary pressing, a road roller is used for carrying out static pressure on the road surface layer prepared by the S3 firstly, then the road surface layer is vibrated, and the temperature of the primary pressing is controlled at 128-135 ℃; secondly, repressing the pavement layer, wherein the repressing temperature is controlled at 110-118 ℃; and finally, performing final pressing on the pavement layer, wherein the temperature of the final pressing is controlled to be 100-105 ℃, so that the asphalt concrete pavement layer is prepared.
2. The asphalt concrete pavement construction method according to claim 1, characterized in that: in the step S4, a vibratory roller is used to vibrate the pavement layer, and the vibration frequency range of the vibration pressure is 45-48 Hz.
3. The asphalt concrete pavement construction method according to claim 1, characterized in that: the rubber powder is waste rubber powder, the waste rubber powder is derived from waste tires of automobiles, and the mesh number of the rubber powder is controlled to be 300-400 meshes.
4. The asphalt concrete pavement construction method according to claim 3, characterized in that: the asphalt concrete material also comprises the following components in parts by weight:
1-1.5 parts of a water reducing agent.
5. The asphalt concrete pavement construction method according to claim 4, characterized in that: the water reducing agent is prepared from calcium lignosulfonate and sodium lignosulfonate in a weight ratio of 1: 1.3-1.5.
6. The asphalt concrete pavement construction method according to claim 5, characterized in that: in the step S2, the preparation method of the asphalt concrete material includes the following steps:
A. adding asphalt in corresponding weight parts into a reaction kettle, stirring and heating to 155-160 ℃ to prepare asphalt slurry;
B. mixing water and cement in corresponding weight portions, and stirring for 40-60min at a stirring speed of 30-50r/min to obtain cement slurry;
C. and (3) adding river sand, ceramic sand, aluminum oxide, steel fibers, straw powder and a water reducing agent in corresponding parts by weight into the cement slurry, heating to 30 ℃, stirring for 20-35min, and adding the asphalt slurry prepared in the step (A) to prepare the asphalt concrete.
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| CN111825388B (en) * | 2020-06-21 | 2022-05-06 | 江阴市新远见工程有限公司 | Modified epoxy asphalt concrete and processing technology thereof |
| CN111851375A (en) * | 2020-07-30 | 2020-10-30 | 杨犄 | Road surface cleaning method for road and bridge construction |
| CN112431084A (en) * | 2020-11-11 | 2021-03-02 | 周静 | Asphalt laying process for road construction |
| CN112411299B (en) * | 2020-11-21 | 2021-12-28 | 韶关市中群建设有限公司 | Energy-saving and environment-friendly construction method for highway |
| CN112592102B (en) * | 2020-12-24 | 2022-04-15 | 江苏长路智造科技有限公司 | Super-tough fiber composite resin concrete and preparation method thereof |
| CN113060984A (en) * | 2021-03-03 | 2021-07-02 | 吴丽谷 | High-strength waterproof concrete for mine operation and preparation process thereof |
| CN115819027B (en) * | 2022-12-24 | 2023-06-30 | 北京路新沥青混凝土有限公司 | Hot-mix epoxy asphalt concrete and preparation method and application thereof |
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