CN108558272B - Regenerative road cold-patch material - Google Patents
Regenerative road cold-patch material Download PDFInfo
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- CN108558272B CN108558272B CN201810509567.XA CN201810509567A CN108558272B CN 108558272 B CN108558272 B CN 108558272B CN 201810509567 A CN201810509567 A CN 201810509567A CN 108558272 B CN108558272 B CN 108558272B
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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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/281—Polyepoxides
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/282—Polyurethanes; Polyisocyanates
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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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Road Paving Structures (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Road Repair (AREA)
Abstract
The invention discloses a regenerative road cold patch, which relates to the technical field of road paving, and comprises the following components in parts by weight, namely 80-120 parts of matrix asphalt; milling 80-120 parts of materials; 1-5 parts of cold-patch additive; 10-25 parts of a release agent; 20-40 parts of aggregate; 20-30 parts of polyurethane prepolymer. The milling material is waste asphalt mixture, and the milling material is prepared into cold-patch material to fully recycle the milling material. The polyurethane prepolymer can improve the cohesive property of the cold-patch material, so that the cold-patch material and a pit interface can form a strong bonding effect, and the asphalt mixture can be prevented from being too early loosened or damaged at the joint of the pit interface after being filled in the pit, and the durability of the cold-patch material is improved. After the polyurethane prepolymer and the liquid asphalt are fully mixed and cured, the asphalt is uniformly distributed in a space net-shaped structure formed by the polyurethane prepolymer, so that the strength of the cold-patch material is improved, and the cold-patch material does not become sticky and soft at high temperature.
Description
Technical Field
The invention relates to the technical field of road paving, in particular to a regenerative road cold-patch material.
Background
The cold-patch material is a road patching material, can be used in all weather, and is suitable for patching various different types of road surface courses in any weather and environment, such as asphalt concrete roads, cement concrete roads, parking lots, airport runways and the like.
Chinese patent with publication number CN101008172B discloses a regenerative road cold-patch material, which comprises the following components in percentage by weight: milling 56-87% of materials; cold-patch additive 0.08-0.34%; 0.87 to 1.6 percent of diesel oil; the rest is new stone, wherein the milling materials comprise 1/6 type I milling materials with the grain diameter of 10-19mm, 4/6 type II milling materials with the grain diameter of 5-10mm and 1/6 type III milling materials with the grain diameter of less than 5mm, which respectively account for the total amount of the milling materials.
In order to meet the storage performance and the construction workability of the asphalt cold-patch material, the cold-patch material cannot rapidly form strength, but the cold-patch material has poor cohesiveness, so that the problems of loosening, falling off at the joint of a pit and a groove interface and the like are easily caused after traffic is opened, and the use durability is poor, so that the cold-patch material can be generally only used as an emergency repair material for pavement pits and needs to be improved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a regenerative road cold-patch material which can improve the durability.
In order to achieve the purpose, the invention provides the following technical scheme:
a regenerative road cold-patch material comprises the following raw materials, by weight, 80-120 parts of matrix asphalt; milling 80-120 parts of materials; 1-5 parts of cold-patch additive; 10-25 parts of a release agent; 20-40 parts of aggregate; 20-30 parts of polyurethane prepolymer; the functionality of the polyurethane prepolymer is 1.8-2.3, the content of isocyanate is 4.5-6.5%, and the polyurethane prepolymer is set to be polyester polyurethane prepolymer.
By adopting the technical scheme, in order to meet the use requirement of the cold patch, the matrix asphalt is diluted into liquid asphalt by the cold patch additive and the separant, and the liquid asphalt can form a flowing liquid within the temperature range of 80-120 ℃, so that the surface of the mineral aggregate of the pit and the groove can be well wetted. When the temperature is reduced to normal temperature, the liquid asphalt is pasty, the viscosity and the cohesion are increased, the surface of the liquid asphalt still has viscosity, and after the pit slot is repaired, the cold-patch mixed particles are favorably and mutually bonded together under the action of a compaction machine and vehicle load.
The cold-patch additive can further improve the wetting degree of the cold-patch additive and the surface of the mineral aggregate while diluting the matrix asphalt, increase the adhesion of the mineral aggregate and the cold-patch additive, form a colloid structure on the surface of the mineral aggregate and prevent an asphalt film from peeling off from the surface of the mineral aggregate. After the separant is added into the matrix asphalt, the viscosity of the matrix asphalt is reduced, so that the mixed cold patch loses certain pavement performance, and the cold patch additive plays a role in improving the pavement performance of the cold patch.
The milling material is a waste asphalt mixture, and the cold patching material prepared from the milling material is utilized to fully recycle the milling material, so that the residual value of the milling material is exerted most effectively, the influence of the milling material on the environment is avoided, the manufacturing cost of the cold patching material is reduced, and the economy is saved.
The polyurethane prepolymer can improve the cohesive property of the cold-patch material, so that the cold-patch material and a pit interface can form a strong bonding effect, and the asphalt mixture can be prevented from being too early loosened or damaged at the joint of the pit interface after being filled in the pit, and the durability of the cold-patch material is improved. Meanwhile, after the polyurethane prepolymer and the liquid asphalt are fully mixed and cured, the asphalt is uniformly distributed in a space net-shaped structure formed by the polyurethane prepolymer, so that the strength of the cold-patch material is improved, and the cold-patch material does not become sticky and soft at high temperature, so that the use requirement under the high-temperature climate condition can be met, and the durability of the cold-patch material is further improved.
The invention is further configured to: the raw materials comprise, by weight, 90-110 parts of matrix asphalt; milling and planing 90-110 parts of material; 2-3 parts of cold-patch additives; 15-20 parts of a separant; 25-30 parts of aggregate; 20-25 parts of polyurethane prepolymer.
The invention is further configured to: the separant is kerosene.
By adopting the technical scheme, the kerosene is used as the separant, and the kerosene can dissolve the matrix asphalt and reduce the viscosity of the matrix asphalt, so that the cold-patch material still has good construction workability at normal temperature or lower temperature; the kerosene is continuously volatilized under the comprehensive influence of vehicle load and external environment, the strength of the cold-patch material is continuously increased, and finally the forming strength is reached. Therefore, the kerosene is convenient for stirring the matrix asphalt, the matrix asphalt and other components can be uniformly mixed, and the cold-patch material can reach the forming strength along with the volatilization of the kerosene, so that the reinforcing effect of the polyurethane prepolymer on the cold-patch material is enhanced, and the durability of the cold-patch material after curing is improved.
The invention is further configured to: the raw materials comprise 20-25 parts of waterborne epoxy resin by weight.
By adopting the technical scheme, the water-based epoxy resin can enhance the cohesive property of the cold-patch material, so that the cold-patch material and the pit slot interface can form a strong bonding effect, the asphalt mixture can be prevented from being loosened too early after the pit slot is filled, or the joint of the pit slot interface is damaged, and the durability of the cold-patch material is further improved. After the water-based epoxy resin and the liquid asphalt are fully mixed and cured, the asphalt is uniformly distributed in a space network structure formed by the water-based epoxy resin, so that the shear strength and the splitting strength of the cold-patch material are improved. The network formed by the water-based epoxy resin and the polyurethane prepolymer can interpenetrate and form an interpenetrating network, so that the structural strength and the durability of the cold-patch material are further improved.
The invention is further configured to: the aggregate is set as limestone.
By adopting the technical scheme, the limestone is used as aggregate, and the cold-patch material has a reinforcing effect, so that the strength of the cold-patch material is improved.
The invention is further configured to: the raw material comprises 20-30 parts by weight of styrene-butadiene-styrene block copolymer.
By adopting the technical scheme, the styrene-butadiene-styrene block copolymer has a hard polystyrene section and a polybutadiene section at the same time, so that the styrene-butadiene-styrene block copolymer has two glass transition temperatures of high temperature of 100 ℃ and low temperature of minus 80 ℃, has plasticity and elasticity, and can improve the high and low temperature performances of the cold-patch material. After the styrene-butadiene-styrene block copolymer is compatible with asphalt in a hot state, the polystyrene block is softened and flows, the polybutadiene block absorbs oil in the asphalt to form a spongy material with the volume increased to nine times of the original volume, after the modified asphalt is cooled, the polystyrene block is hardened and physically crosslinked, the polybutadiene block enters an elastic three-dimensional network, and meanwhile, the polybutadiene block can also enter an interpenetrating network formed by a polyurethane prepolymer and water-based epoxy resin, so that the cold-patch material can generate high tensile strength and high-temperature deformation resistance under a road surface load state, and the service performance of the cold-patch material is improved.
The invention is further configured to: the particle diameter of the styrene-butadiene-styrene block copolymer is less than 5 mu m.
By adopting the technical scheme, the particle size of the styrene-butadiene-styrene block copolymer is smaller than 5 mu m, which is beneficial to improving the compatibility between the styrene-butadiene-styrene block copolymer and machine-made asphalt, so that the distribution uniformity of the styrene-butadiene-styrene block copolymer in the asphalt is improved, and the modification effect of the styrene-butadiene-styrene block copolymer on cold-fed materials is improved.
The invention is further configured to: the raw material comprises 30-50 parts of octadecyl trimethyl ammonium chloride by weight.
By adopting the technical scheme, the octadecyl trimethyl ammonium chloride has an emulsifying effect, the compatibility among all components can be improved, the mixing uniformity among all the components is improved while the cold-patch fluid is stirred, so that the arrangement uniformity of a space net-shaped structure formed by the polyurethane prepolymer and the water-based epoxy resin is improved, the forming strength and durability of the cold-patch fluid are improved, and the modification effect of the styrene-butadiene-styrene block copolymer on the cold-patch fluid is also improved.
The invention is further configured to: the raw material comprises 25-40 parts by weight of dicumyl peroxide.
By adopting the technical scheme, the dicumyl peroxide can effectively improve the crosslinking degree between the styrene-butadiene-styrene block copolymer and the matrix asphalt, so that the high-temperature and low-temperature performances of the cold-patch material are obviously improved, and the durability of the cold-patch material is improved.
In conclusion, the invention has the following beneficial effects:
1. the polyurethane prepolymer and the water-based epoxy resin can improve the cohesive property of the cold-patch material, so that the cold-patch material and a pit interface can form a strong bonding effect, and the asphalt mixture can be prevented from being loosened too early or damaged at a joint of the pit interface after being filled in a pit, so that the durability of the cold-patch material is improved;
2. the polyurethane prepolymer and the water-based epoxy resin can both form a net-shaped space structure, so that the shear strength and the splitting strength of the cold-patch material are improved, and meanwhile, the net-shaped space structure formed by the polyurethane prepolymer and the water-based epoxy resin can form an interpenetrating network, so that the strength of the cold-patch material is further improved;
3. the styrene-butadiene-styrene block copolymer can improve the low and high temperature performance of the cold-patch material, and the dicumyl peroxide can effectively improve the crosslinking degree between the styrene-butadiene-styrene block copolymer and the matrix asphalt, so that the high and low temperature performance of the cold-patch material is obviously improved, and the durability of the cold-patch material is improved;
4. the octadecyl trimethyl ammonium chloride can improve the compatibility among all components, thereby improving the arrangement uniformity of a space network structure formed by the polyurethane prepolymer and the waterborne epoxy resin so as to improve the forming strength and durability of the cold-patch material, and simultaneously improving the modification effect of the styrene-butadiene-styrene block copolymer on the cold-patch material.
Detailed Description
Example 1, a regenerative road cold patch, the raw material composition is shown in table 1 by weight. Wherein the cold feed is prepared by the following steps:
step 1, heating the matrix asphalt and the milling material to 140 ℃ of 120-;
step 2, putting the polyurethane prepolymer, the waterborne epoxy resin and the octadecyl trimethyl ammonium chloride into the diluted asphalt and uniformly stirring to obtain a mixture;
step 3, putting the styrene-butadiene-styrene block copolymer and dicumyl peroxide into the cold-patch mixture and uniformly stirring to obtain a modified mixture;
and 4, putting limestone into the modified mixture, mixing and stirring to obtain the cold-patch material.
Example 2 differs from example 1 in that the raw material components are shown in table 1 in parts by weight.
Example 3, a regenerative road cold patch, the raw material composition is shown in table 1 by weight. Wherein the cold feed is prepared by the following steps:
step 1, heating the matrix asphalt and the milling material to 140 ℃ of 120-;
step 2, putting the polyurethane prepolymer and octadecyl trimethyl ammonium chloride into the diluted asphalt and uniformly stirring to obtain a mixture;
step 3, putting the styrene-butadiene-styrene block copolymer and dicumyl peroxide into the cold-patch mixture and uniformly stirring to obtain a modified mixture;
and 4, putting limestone into the modified mixture, mixing and stirring to obtain the cold-patch material.
Example 4 differs from example 3 in that the raw material components are shown in table 1 in parts by weight.
Example 5, a regenerative road cold patch, the raw material composition by weight portion is shown in table 1. Wherein the cold feed is prepared by the following steps:
step 1, heating the matrix asphalt and the milling material to 140 ℃ of 120-;
step 2, putting the polyurethane prepolymer, the waterborne epoxy resin and the octadecyl trimethyl ammonium chloride into the diluted asphalt and uniformly stirring to obtain a mixture;
step 3, putting dicumyl peroxide into the cold-patch mixture and uniformly stirring to obtain a modified mixture;
and 4, putting limestone into the modified mixture, mixing and stirring to obtain the cold-patch material.
Example 6 is different from example 5 in that the raw material components are shown in table 1 in parts by weight.
Example 7, a regenerative road cold patch, the raw material composition by weight portion is shown in table 1. Wherein the cold feed is prepared by the following steps:
step 1, heating the matrix asphalt and the milling material to 140 ℃ of 120-;
step 2, putting the polyurethane prepolymer and the waterborne epoxy resin into the diluted asphalt and uniformly stirring to obtain a mixture;
step 3, putting the styrene-butadiene-styrene block copolymer and dicumyl peroxide into the cold-patch mixture and uniformly stirring to obtain a modified mixture;
and 4, putting limestone into the modified mixture, mixing and stirring to obtain the cold-patch material.
Example 8 is different from example 7 in that the raw material components are shown in table 1 in parts by weight.
Example 9, a regenerative road cold patch, the raw material composition of which is shown in table 1 by weight. Wherein the cold feed is prepared by the following steps:
step 1, heating the matrix asphalt and the milling material to 140 ℃ of 120-;
step 2, putting the polyurethane prepolymer, the waterborne epoxy resin and the octadecyl trimethyl ammonium chloride into the diluted asphalt and uniformly stirring to obtain a mixture;
step 3, adding the styrene-butadiene-styrene block copolymer into the cold-patch mixture and uniformly stirring to obtain a modified mixture;
and 4, putting limestone into the modified mixture, mixing and stirring to obtain the cold-patch material.
Example 10 differs from example 9 in that the raw material components are shown in table 1 in parts by weight.
Comparative example 1, a regenerative road cold-patch, the raw material composition is shown in table 1 by weight. Wherein the cold feed is prepared by the following steps:
step 1, heating the matrix asphalt and the milling material to 140 ℃ of 120-;
step 2, putting the waterborne epoxy resin and the octadecyl trimethyl ammonium chloride into the diluted asphalt and uniformly stirring to obtain a mixture;
step 3, putting the styrene-butadiene-styrene block copolymer and dicumyl peroxide into the cold-patch mixture and uniformly stirring to obtain a modified mixture;
and 4, putting limestone into the modified mixture, mixing and stirring to obtain the cold-patch material.
Comparative example 2 is different from comparative example 1 in that the raw material components are shown in table 1 in parts by weight.
The polyurethane prepolymers of examples 1 to 10 and comparative examples 1 to 2 were polyester polyurethane prepolymers having a functionality of 1.8 to 2.3 and an isocyanate group content of 4.5 to 6.5%.
The adhesion of the cold-patch materials was tested using the following test method:
1) injecting 800mL of distilled water into a 1000mL clean beaker, and heating to boil; 2) respectively putting 250g of the cold-patch materials into boiling water of corresponding beakers, and stirring for 3min at the speed of 1 week/second by using a glass rod; 3) stopping heating and removing the asphalt floating on the water surface to avoid secondary coating; 4) cooling the water to room temperature, pouring out the water and putting the wet mixed material on white paper; 5) and (3) observing and evaluating the adhesion grade, wherein the evaluation standard of the adhesion grade of the cold-patch adhesive is shown in table 2, and the test result is shown in table 1.
The strength after cold-patch forming adopts the following test method:
1) weighing 1180g of the mixed cold patch asphalt mixture, putting the mixture into a test mold at normal temperature, and compacting the two surfaces of the mixture 50 times respectively; 2) placing the test mould and the mould in a 110 ℃ oven in a side face vertical mode for curing for 24 hours, taking out the test mould and compacting the test mould on two sides for 25 times respectively; 3) and standing the test mould at room temperature for 24h, demolding, curing in a constant-temperature water tank at 60 ℃ for 30min, and performing a Marshall test to obtain the Marshall stability, as shown in Table 1.
TABLE 1
TABLE 1 continuation
TABLE 2
| Asphalt flaking on the aggregate surface after the test | Grade of adhesion |
| The asphalt is completely preserved, and the stripping rate is close to 0 | 5 |
| Small part of the asphalt is moved by water, the thickness is not uniform, and the peeling rate is less than 10 percent | 4 |
| The asphalt is locally and obviously moved by water and basically remained on the surface of the aggregate, and the stripping rate is more than 30 percent | 3 |
| Most of the asphalt is moved by water and is partially retained on the surface of the aggregate, and the stripping rate is more than 30 percent | 2 |
| The asphalt is completely moved by water, the aggregate is exposed, and the asphalt almost completely floats on the water surface | 1 |
The present invention is not intended to be limited to the embodiments shown herein, and any modifications, equivalents, improvements, etc. made within the design concept of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. A regenerative road cold patch which is characterized in that: the raw materials comprise the following components in parts by weight,
80-120 parts of matrix asphalt;
milling 80-120 parts of materials;
1-5 parts of cold-patch additive;
10-25 parts of a release agent;
20-40 parts of aggregate;
20-30 parts of polyurethane prepolymer;
20-25 parts of water-based epoxy resin;
20-30 parts of styrene-butadiene-styrene block copolymer;
25-40 parts of dicumyl peroxide;
30-50 parts of octadecyl trimethyl ammonium chloride;
the functionality of the polyurethane prepolymer is 1.8-2.3, the content of isocyanate is 4.5-6.5%, and the polyurethane prepolymer is set to be polyester polyurethane prepolymer.
2. The regenerative road cold patch as claimed in claim 1, wherein: the separant is kerosene.
3. The regenerative road cold patch as claimed in claim 1, wherein: the aggregate is set as limestone.
4. The regenerative road cold patch as claimed in claim 1, wherein: the particle diameter of the styrene-butadiene-styrene block copolymer is less than 5 mu m.
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| CN110171942B (en) * | 2019-07-01 | 2021-07-13 | 沈阳建筑大学 | Moisture-curing reaction type asphalt pavement cold-patch material and preparation method thereof |
| CN110387132A (en) * | 2019-08-22 | 2019-10-29 | 河南万里交通科技集团股份有限公司 | A kind of nano modified alphalt cold-repairing material and preparation method thereof |
| CN113526906B (en) * | 2021-07-15 | 2022-09-16 | 郑州中科新兴产业技术研究院 | Preparation method and application of latent curing cold-mixed cold-laid asphalt mixture |
| CN114656239A (en) * | 2022-04-07 | 2022-06-24 | 北京市政路桥锐诚科技有限公司 | Early-strength water-resistant asphalt pavement pit repairing material and asphalt pavement cold-patch material |
| CN115259750A (en) * | 2022-07-21 | 2022-11-01 | 河南路达新环保科技有限公司 | Preparation method of high-performance regenerated cold-patch asphalt mixture |
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