CN108316084B - Asphalt pavement pit repairing process - Google Patents
Asphalt pavement pit repairing process Download PDFInfo
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- CN108316084B CN108316084B CN201810152390.2A CN201810152390A CN108316084B CN 108316084 B CN108316084 B CN 108316084B CN 201810152390 A CN201810152390 A CN 201810152390A CN 108316084 B CN108316084 B CN 108316084B
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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
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J183/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
- C09J183/04—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2206—Oxides; Hydroxides of metals of calcium, strontium or barium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2262—Oxides; Hydroxides of metals of manganese
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/329—Phosphorus containing acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Road Repair (AREA)
Abstract
The invention provides a bituminous pavement pit repairing process, which sequentially comprises the procedures of pit groove forming, pit groove cleaning, pit groove bottom surface treatment and concrete precast block pasting, wherein the concrete precast block adhesive-sealant is smeared on the bottom surface of the pit groove and the periphery of the side surface of the cut original pavement, the sealant is smeared on the bottom and the periphery of the side surface of the concrete precast block, and the concrete precast block is pasted with the bottom surface of the pit groove and the surface of the cut original pavement and the side surface, so that the process can be completed; the sealant is prepared from room-temperature vulcanized silicone rubber, liquid polysulfide rubber, ethylene-vinyl acetate resin, soybean lecithin, dibutyl phthalate, white carbon black, manganese dioxide, sodium stearate, octyl polyoxyethylene ether, calcium chloride, zinc oxide, an anti-aging agent, polyphosphoric acid and sodium dodecyl sulfate. According to the invention, polyphosphoric acid is added into the sealant, so that the polarity and cohesion of molecules are increased, and the physical and mechanical properties of the sealant are enhanced.
Description
Technical Field
The invention belongs to the technical field of asphalt pavement maintenance, and particularly relates to a process for repairing pits of an asphalt pavement.
Background
The road maintenance is important content for keeping road conditions intact, prolonging the service life of roads, giving play to social and economic benefits of the roads and providing good service for economic construction. In the whole highway maintenance work, the pavement maintenance is the central link of the highway maintenance work. Asphalt pavement is the main structural form of Chinese highway and urban road pavement. Along with the increase of road traffic mileage and the extension of service life, the highway maintenance workload will be larger and larger, and the required maintenance fund will be larger and larger. In order to adapt to uninterrupted, rapid, comfortable and safe traffic, the pavement maintenance quality must be improved, so that the service level of the pavement is effectively ensured. Among various damage forms of asphalt pavements, cracks and pits have the largest proportion and are most common. The crack breakage belongs to the structural damage of the asphalt pavement, and the durability of the asphalt pavement is influenced more. The damage of the pit belongs to the functional damage of the asphalt pavement, and the service performance of the asphalt pavement is influenced.
The pit repairing mainly aims at repairing and strengthening the defects of pit, local net crack, cracking and the like, and can also repair the defects of local subsidence, hugging, sliding crack and the like. The asphalt concrete prefabricated block repairing method is a newly developed pit repairing method, and is characterized by that the mineral mixture with good gradation and viscous asphalt are heated and mixed by using special equipment, then the mixed loose mixture is placed in steel mould, and compacted into slab repairing material with a certain firmness and size specification by using press machine. When repairing damaged pits, lofting, grooving and bottom layer reinforcement leveling must be carried out according to the multiple of the size specification of the asphalt concrete precast block, and then the precast block is flatly laid in the pits. The repairing method is simple and is not limited by seasons. However, joints between precast blocks and joints between the precast blocks and the edges of the pit need to be sealed by joint compound, and the sealant has good adhesiveness, high elasticity, aging resistance, convenient construction and the like.
Disclosure of Invention
The technical problem to be solved is as follows: in order to solve the problem that the physical and mechanical properties and the aging resistance of the sealant adopted in the existing asphalt pavement pit repairing process are poor, polyphosphoric acid is added into the sealant to adjust the interaction force among macromolecules in the sealant, so that the polarity and the cohesion of molecules are increased, and the physical and mechanical properties of the sealant are enhanced.
The technical scheme is as follows: a process for repairing pits of an asphalt pavement comprises the following steps:
step 1, forming a pit groove, and forming a groove at a damaged part according to a 'round hole square supplement' principle;
step 2, cleaning the pit slot;
step 3, selecting the size of the concrete precast block;
step 4, treating the bottom surface of the pit, putting cushion stones and sealant into the pit, mixing and flattening;
step 5, sticking the concrete precast block, smearing concrete precast block adhesive-sealant on the bottom surface of the pit slot and around the cut side surface of the original pavement, smearing sealant on the bottom and around the side surface of the concrete precast block, and sticking the concrete precast block with the bottom surface of the pit slot and the cut original pavement and side surface;
the sealant is prepared from room-temperature vulcanized silicone rubber, liquid polysulfide rubber, ethylene-vinyl acetate resin, soybean lecithin, dibutyl phthalate, white carbon black, manganese dioxide, sodium stearate, octyl polyoxyethylene ether, calcium chloride, zinc oxide, an anti-aging agent, polyphosphoric acid and sodium dodecyl sulfate.
Further, the sealant comprises the following raw materials in parts by weight: 15-20 parts of room temperature vulcanized silicone rubber, 10-15 parts of liquid polysulfide rubber, 5-8 parts of ethylene-vinyl acetate resin, 1-2 parts of soybean lecithin, 1.2-3.5 parts of dibutyl phthalate, 1.2-2.8 parts of white carbon black, 0.8-1.6 parts of manganese dioxide, 1.4-2.2 parts of sodium stearate, 0.8-1.7 parts of octyl polyoxyethylene ether, 0.4-0.9 part of calcium chloride, 1-2 parts of zinc oxide, 1-2 parts of an anti-aging agent, 3-7 parts of polyphosphoric acid and 2-6 parts of sodium dodecyl sulfate.
Further, the room temperature vulcanized silicone rubber is methyl vinyl silicone rubber.
Further, the anti-aging agent is N-N' -diphenyl-p-phenylenediamine.
The preparation method of the sealant for repairing the pits of the asphalt pavement comprises the following steps:
step 1, mixing room-temperature vulcanized silicone rubber, liquid polysulfide rubber, ethylene-vinyl acetate resin and soybean lecithin, reacting for 1-1.5h at 80-95 ℃, cooling, adding dibutyl phthalate and white carbon black, and grinding to obtain a mixture A;
step 2, mixing manganese dioxide, sodium stearate, octyl polyoxyethylene ether, calcium chloride, zinc oxide and an anti-aging agent, and grinding to obtain a mixture B;
and 3, mixing the mixture A and the mixture B, heating to 175-185 ℃, adding polyphosphoric acid and sodium dodecyl sulfate while stirring, continuously stirring for 0.5-1h, and cooling to room temperature to obtain the compound.
Further, the mixing conditions in step 1 are 3000-4000rpm for 10-20 min.
Further, the mixing conditions in step 2 were 2000-3000rpm for 10-20 min.
Further, the stirring speed in step 3 was 1500-.
Further, the cooling process in step 3 is performed in a carbon dioxide atmosphere.
Has the advantages that: the repair process is not limited by seasons, has good sealing effect in the construction process, and can be full, smooth, neat and attractive; the small mechanical construction and the manual construction are convenient; the traffic can be opened after 1 hour of construction; after one year observation after construction, the effect is better, and no cracking or degumming phenomenon exists.
Detailed Description
Example 1
A process for repairing pits of an asphalt pavement comprises the following steps:
step 1, forming a pit groove, and forming a groove at a damaged part according to a 'round hole square supplement' principle;
step 2, cleaning the pit slot;
step 3, selecting the size of the concrete precast block;
step 4, treating the bottom surface of the pit, putting cushion stones and sealant into the pit, mixing and flattening;
step 5, sticking the concrete precast block, smearing concrete precast block adhesive-sealant on the bottom surface of the pit slot and around the cut side surface of the original pavement, smearing sealant on the bottom and around the side surface of the concrete precast block, and sticking the concrete precast block with the bottom surface of the pit slot and the cut original pavement and side surface;
the sealant is prepared from 17 parts of room-temperature vulcanized silicone rubber, 11 parts of liquid polysulfide rubber, 6 parts of ethylene-vinyl acetate resin, 1.3 parts of soybean lecithin, 1.8 parts of dibutyl phthalate, 1.7 parts of white carbon black, 0.9 part of manganese dioxide, 1.7 parts of sodium stearate, 1.1 parts of octyl polyoxyethylene ether, 0.6 part of calcium chloride, 1.4 parts of zinc oxide, 1.3 parts of anti-aging agent, 5 parts of polyphosphoric acid and 4 parts of sodium dodecyl sulfate.
The room temperature vulcanized silicone rubber is methyl vinyl silicone rubber, and the anti-aging agent is N-N' -diphenyl-p-phenylenediamine.
The preparation method of the sealant for repairing the pits of the asphalt pavement comprises the following steps:
step 1, mixing room-temperature vulcanized silicone rubber, liquid polysulfide rubber, ethylene-vinyl acetate resin and soybean lecithin, reacting for 1-1.5h at 80-95 ℃, cooling, adding dibutyl phthalate and white carbon black, and grinding to obtain a mixture A;
step 2, mixing manganese dioxide, sodium stearate, octyl polyoxyethylene ether, calcium chloride, zinc oxide and an anti-aging agent, and grinding to obtain a mixture B;
and 3, mixing the mixture A and the mixture B, heating to 175-185 ℃, adding polyphosphoric acid and sodium dodecyl sulfate while stirring, continuously stirring for 0.5-1h, and cooling to room temperature to obtain the compound.
Wherein, the mixing condition in the step 1 is 3000rpm and 20 min; the mixing conditions in the step 2 are 2000rpm and 20 min; in step 3, the stirring speed is 1500rpm, and the cooling process is carried out in a carbon dioxide atmosphere.
Example 2
A process for repairing pits of an asphalt pavement comprises the following steps:
step 1, forming a pit groove, and forming a groove at a damaged part according to a 'round hole square supplement' principle;
step 2, cleaning the pit slot;
step 3, selecting the size of the concrete precast block;
step 4, treating the bottom surface of the pit, putting cushion stones and sealant into the pit, mixing and flattening;
step 5, sticking the concrete precast block, smearing concrete precast block adhesive-sealant on the bottom surface of the pit slot and around the cut side surface of the original pavement, smearing sealant on the bottom and around the side surface of the concrete precast block, and sticking the concrete precast block with the bottom surface of the pit slot and the cut original pavement and side surface;
the sealant is prepared from 18 parts of room-temperature vulcanized silicone rubber, 14 parts of liquid polysulfide rubber, 7 parts of ethylene-vinyl acetate resin, 1.6 parts of soybean lecithin, 2.1 parts of dibutyl phthalate, 1.9 parts of white carbon black, 1.4 parts of manganese dioxide, 1.9 parts of sodium stearate, 1.4 parts of octyl polyoxyethylene ether, 0.7 part of calcium chloride, 1.5 parts of zinc oxide, 1.7 parts of an anti-aging agent, 4 parts of polyphosphoric acid and 5 parts of sodium dodecyl sulfate.
The room temperature vulcanized silicone rubber is methyl vinyl silicone rubber, and the anti-aging agent is N-N' -diphenyl-p-phenylenediamine.
The preparation method of the sealant for repairing the pits of the asphalt pavement comprises the following steps:
step 1, mixing room-temperature vulcanized silicone rubber, liquid polysulfide rubber, ethylene-vinyl acetate resin and soybean lecithin, reacting for 1-1.5h at 80-95 ℃, cooling, adding dibutyl phthalate and white carbon black, and grinding to obtain a mixture A;
step 2, mixing manganese dioxide, sodium stearate, octyl polyoxyethylene ether, calcium chloride, zinc oxide and an anti-aging agent, and grinding to obtain a mixture B;
and 3, mixing the mixture A and the mixture B, heating to 175-185 ℃, adding polyphosphoric acid and sodium dodecyl sulfate while stirring, continuously stirring for 0.5-1h, and cooling to room temperature to obtain the compound.
Wherein, the mixing condition in the step 1 is 3000rpm and 20 min; the mixing conditions in the step 2 are 2000rpm and 20 min; in step 3, the stirring speed is 1500rpm, and the cooling process is carried out in a carbon dioxide atmosphere.
Example 3
A process for repairing pits of an asphalt pavement comprises the following steps:
step 1, forming a pit groove, and forming a groove at a damaged part according to a 'round hole square supplement' principle;
step 2, cleaning the pit slot;
step 3, selecting the size of the concrete precast block;
step 4, treating the bottom surface of the pit, putting cushion stones and sealant into the pit, mixing and flattening;
step 5, sticking the concrete precast block, smearing concrete precast block adhesive-sealant on the bottom surface of the pit slot and around the cut side surface of the original pavement, smearing sealant on the bottom and around the side surface of the concrete precast block, and sticking the concrete precast block with the bottom surface of the pit slot and the cut original pavement and side surface;
the sealant is prepared from 16 parts of room-temperature vulcanized silicone rubber, 14 parts of liquid polysulfide rubber, 6 parts of ethylene-vinyl acetate resin, 1.7 parts of soybean lecithin, 3.1 parts of dibutyl phthalate, 2.4 parts of white carbon black, 1.3 parts of manganese dioxide, 1.9 parts of sodium stearate, 1.5 parts of octyl polyoxyethylene ether, 0.7 part of calcium chloride, 1.6 parts of zinc oxide, 1.3 parts of an anti-aging agent, 5 parts of polyphosphoric acid and 4 parts of sodium dodecyl sulfate.
The room temperature vulcanized silicone rubber is methyl vinyl silicone rubber, and the anti-aging agent is N-N' -diphenyl-p-phenylenediamine.
The preparation method of the sealant for repairing the pits of the asphalt pavement comprises the following steps:
step 1, mixing room-temperature vulcanized silicone rubber, liquid polysulfide rubber, ethylene-vinyl acetate resin and soybean lecithin, reacting for 1-1.5h at 80-95 ℃, cooling, adding dibutyl phthalate and white carbon black, and grinding to obtain a mixture A;
step 2, mixing manganese dioxide, sodium stearate, octyl polyoxyethylene ether, calcium chloride, zinc oxide and an anti-aging agent, and grinding to obtain a mixture B;
and 3, mixing the mixture A and the mixture B, heating to 175-185 ℃, adding polyphosphoric acid and sodium dodecyl sulfate while stirring, continuously stirring for 0.5-1h, and cooling to room temperature to obtain the compound.
Wherein, the mixing condition in the step 1 is 3000rpm and 20 min; the mixing conditions in the step 2 are 2000rpm and 20 min; in step 3, the stirring speed is 1500rpm, and the cooling process is carried out in a carbon dioxide atmosphere.
Example 4
A process for repairing pits of an asphalt pavement comprises the following steps:
step 1, forming a pit groove, and forming a groove at a damaged part according to a 'round hole square supplement' principle;
step 2, cleaning the pit slot;
step 3, selecting the size of the concrete precast block;
step 4, treating the bottom surface of the pit, putting cushion stones and sealant into the pit, mixing and flattening;
step 5, sticking the concrete precast block, smearing concrete precast block adhesive-sealant on the bottom surface of the pit slot and around the cut side surface of the original pavement, smearing sealant on the bottom and around the side surface of the concrete precast block, and sticking the concrete precast block with the bottom surface of the pit slot and the cut original pavement and side surface;
the sealant is prepared from 20 parts of room-temperature vulcanized silicone rubber, 15 parts of liquid polysulfide rubber, 8 parts of ethylene-vinyl acetate resin, 2 parts of soybean lecithin, 3.5 parts of dibutyl phthalate, 2.8 parts of white carbon black, 1.6 parts of manganese dioxide, 2.2 parts of sodium stearate, 1.7 parts of octyl polyoxyethylene ether, 0.9 part of calcium chloride, 2 parts of zinc oxide, 2 parts of an anti-aging agent, 7 parts of polyphosphoric acid and 6 parts of sodium dodecyl sulfate.
The room temperature vulcanized silicone rubber is methyl vinyl silicone rubber, and the anti-aging agent is N-N' -diphenyl-p-phenylenediamine.
The preparation method of the sealant for repairing the pits of the asphalt pavement comprises the following steps:
step 1, mixing room-temperature vulcanized silicone rubber, liquid polysulfide rubber, ethylene-vinyl acetate resin and soybean lecithin, reacting for 1-1.5h at 80-95 ℃, cooling, adding dibutyl phthalate and white carbon black, and grinding to obtain a mixture A;
step 2, mixing manganese dioxide, sodium stearate, octyl polyoxyethylene ether, calcium chloride, zinc oxide and an anti-aging agent, and grinding to obtain a mixture B;
and 3, mixing the mixture A and the mixture B, heating to 175-185 ℃, adding polyphosphoric acid and sodium dodecyl sulfate while stirring, continuously stirring for 0.5-1h, and cooling to room temperature to obtain the compound.
Wherein, the mixing conditions in the step 1 are 4000rpm and 10 min; in the step 2, the mixing condition is 3000rpm and 10 min; in step 3, the stirring speed was 200rpm, and the cooling process was carried out in a carbon dioxide atmosphere.
Example 5
This example differs from example 3 in that: polyphosphoric acid is not added to the sealant.
A process for repairing pits of an asphalt pavement comprises the following steps:
step 1, forming a pit groove, and forming a groove at a damaged part according to a 'round hole square supplement' principle;
step 2, cleaning the pit slot;
step 3, selecting the size of the concrete precast block;
step 4, treating the bottom surface of the pit, putting cushion stones and sealant into the pit, mixing and flattening;
step 5, sticking the concrete precast block, smearing concrete precast block adhesive-sealant on the bottom surface of the pit slot and around the cut side surface of the original pavement, smearing sealant on the bottom and around the side surface of the concrete precast block, and sticking the concrete precast block with the bottom surface of the pit slot and the cut original pavement and side surface;
the sealant is prepared from 16 parts of room-temperature vulcanized silicone rubber, 14 parts of liquid polysulfide rubber, 6 parts of ethylene-vinyl acetate resin, 1.7 parts of soybean lecithin, 3.1 parts of dibutyl phthalate, 2.4 parts of white carbon black, 1.3 parts of manganese dioxide, 1.9 parts of sodium stearate, 1.5 parts of octyl polyoxyethylene ether, 0.7 part of calcium chloride, 1.6 parts of zinc oxide, 1.3 parts of an anti-aging agent and 4 parts of sodium dodecyl sulfate.
The room temperature vulcanized silicone rubber is methyl vinyl silicone rubber, and the anti-aging agent is N-N' -diphenyl-p-phenylenediamine.
The preparation method of the sealant for repairing the pits of the asphalt pavement comprises the following steps:
step 1, mixing room-temperature vulcanized silicone rubber, liquid polysulfide rubber, ethylene-vinyl acetate resin and soybean lecithin, reacting for 1-1.5h at 80-95 ℃, cooling, adding dibutyl phthalate and white carbon black, and grinding to obtain a mixture A;
step 2, mixing manganese dioxide, sodium stearate, octyl polyoxyethylene ether, calcium chloride, zinc oxide and an anti-aging agent, and grinding to obtain a mixture B;
and 3, mixing the mixture A and the mixture B, heating to 175-185 ℃, adding the sodium dodecyl sulfate while stirring, continuing stirring for 0.5-1h, and cooling to room temperature to obtain the sodium dodecyl sulfate.
Wherein, the mixing condition in the step 1 is 3000rpm and 20 min; the mixing conditions in the step 2 are 2000rpm and 20 min; in step 3, the stirring speed is 1500rpm, and the cooling process is carried out in a carbon dioxide atmosphere.
The performance tests carried out on the sealants used in examples 1 to 5 according to the national standard gave the following results:
as can be seen from the above table, the sealant adopted in the repairing process of the invention has excellent physical and mechanical properties, and good high temperature aging resistance and storage stability; the construction is not limited by seasons, the sealing effect is better in the construction process, and the filling, smoothing, tidying and attractive effects can be achieved; the small mechanical construction and the manual construction are convenient; the traffic can be opened after 1 hour of construction; after one year observation after construction, the effect is better, and no cracking or degumming phenomenon exists.
In example 5, the tensile strength, hardness and shear strength of the sealant are all reduced but the elongation at break is increased because polyphosphoric acid is not added, which probably can adjust the interaction force among macromolecules in the sealant, increase the polarity and cohesion of molecules and enhance the physical and mechanical properties of the sealant.
Claims (9)
1. A process for repairing pits of an asphalt pavement comprises the following steps:
step 1, forming a pit groove, and forming a groove at a damaged part according to a 'round hole square supplement' principle;
step 2, cleaning the pit slot;
step 3, selecting the size of the concrete precast block;
step 4, treating the bottom surface of the pit, putting cushion stones and sealant into the pit, mixing and flattening;
step 5, sticking the concrete precast block, smearing concrete precast block adhesive-sealant on the bottom surface of the pit slot and around the cut side surface of the original pavement, smearing sealant on the bottom and around the side surface of the concrete precast block, and sticking the concrete precast block with the bottom surface of the pit slot and the cut original pavement and side surface;
the method is characterized in that: the sealant is prepared from room-temperature vulcanized silicone rubber, liquid polysulfide rubber, ethylene-vinyl acetate resin, soybean lecithin, dibutyl phthalate, white carbon black, manganese dioxide, sodium stearate, octyl polyoxyethylene ether, calcium chloride, zinc oxide, an anti-aging agent, polyphosphoric acid and sodium dodecyl sulfate.
2. The asphalt pavement pit repairing process according to claim 1, characterized in that: the sealant comprises the following raw materials in parts by weight: 15-20 parts of room temperature vulcanized silicone rubber, 10-15 parts of liquid polysulfide rubber, 5-8 parts of ethylene-vinyl acetate resin, 1-2 parts of soybean lecithin, 1.2-3.5 parts of dibutyl phthalate, 1.2-2.8 parts of white carbon black, 0.8-1.6 parts of manganese dioxide, 1.4-2.2 parts of sodium stearate, 0.8-1.7 parts of octyl polyoxyethylene ether, 0.4-0.9 part of calcium chloride, 1-2 parts of zinc oxide, 1-2 parts of an anti-aging agent, 3-7 parts of polyphosphoric acid and 2-6 parts of sodium dodecyl sulfate.
3. The asphalt pavement pit repairing process according to claim 2, characterized in that: the room temperature vulcanized silicone rubber is methyl vinyl silicone rubber.
4. The asphalt pavement pit repairing process according to claim 2, characterized in that: the anti-aging agent is N-N' -diphenyl-p-phenylenediamine.
5. The asphalt pavement pit repairing process according to claim 1, characterized in that: the preparation method of the sealant comprises the following steps:
step 1, mixing room-temperature vulcanized silicone rubber, liquid polysulfide rubber, ethylene-vinyl acetate resin and soybean lecithin, reacting for 1-1.5h at 80-95 ℃, cooling, adding dibutyl phthalate and white carbon black, and grinding to obtain a mixture A;
step 2, mixing manganese dioxide, sodium stearate, octyl polyoxyethylene ether, calcium chloride, zinc oxide and an anti-aging agent, and grinding to obtain a mixture B;
and 3, mixing the mixture A and the mixture B, heating to 175-185 ℃, adding polyphosphoric acid and sodium dodecyl sulfate while stirring, continuously stirring for 0.5-1h, and cooling to room temperature to obtain the compound.
6. The asphalt pavement pit repairing process according to claim 5, characterized in that: the mixing conditions in step 1 are 3000-.
7. The asphalt pavement pit repairing process according to claim 5, characterized in that: the mixing conditions in step 2 are 2000-3000rpm for 10-20 min.
8. The asphalt pavement pit repairing process according to claim 5, characterized in that: the stirring speed in step 3 was 1500-.
9. The asphalt pavement pit repairing process according to claim 5, characterized in that: the cooling process in step 3 is carried out in a carbon dioxide atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810152390.2A CN108316084B (en) | 2018-02-14 | 2018-02-14 | Asphalt pavement pit repairing process |
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| CN201810152390.2A CN108316084B (en) | 2018-02-14 | 2018-02-14 | Asphalt pavement pit repairing process |
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| CN108316084A CN108316084A (en) | 2018-07-24 |
| CN108316084B true CN108316084B (en) | 2020-07-10 |
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| CN201810152390.2A Active CN108316084B (en) | 2018-02-14 | 2018-02-14 | Asphalt pavement pit repairing process |
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| CN110318328A (en) * | 2019-06-26 | 2019-10-11 | 中国路桥工程有限责任公司 | A kind of bituminous pavement fast repairing method |
| CN111809533A (en) * | 2020-07-09 | 2020-10-23 | 常德市城市桥梁管理处 | Concrete bridge asphalt pavement pit hole repairing method |
| CN114875761A (en) * | 2022-05-24 | 2022-08-09 | 浙江嘉湖生态建设有限公司 | Rapid repair structure for municipal road and construction method thereof |
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| CN1966599A (en) * | 2005-11-17 | 2007-05-23 | 上海橡胶制品研究所 | Room temperature vulcanized silastic adhesive/sealing agent composition |
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