CN111747687A - Repair type high-speed pavement asphalt mixture and preparation method thereof - Google Patents
Repair type high-speed pavement asphalt mixture and preparation method thereof Download PDFInfo
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- CN111747687A CN111747687A CN202010663268.9A CN202010663268A CN111747687A CN 111747687 A CN111747687 A CN 111747687A CN 202010663268 A CN202010663268 A CN 202010663268A CN 111747687 A CN111747687 A CN 111747687A
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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
- 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
Abstract
The invention discloses a repair type high-speed pavement asphalt mixture, and relates to the technical field of asphalt mixtures. The technical key points are as follows: the repair type high-speed pavement asphalt mixture comprises: 250-300 parts of aggregate; 25-30 parts of asphalt; 0.25-0.5 part of polyester fiber; 10-15 parts of rubber powder; 3-8 parts of a tackifier; 3-8 parts of an adhesive; 1-5 parts of silicon carbide. The preparation method comprises the following steps: s1, putting the aggregate into a drying barrel, stirring at 1500-2000rpm at 100-120 ℃ for 2-2.5h, and drying; s2, putting the dried aggregate, the tackifier, the adhesive, the rubber powder, the polyester fiber and the silicon carbide into a stirring cylinder, and stirring for 15-30S at the rotating speed of 1500-2000 rpm; s3, heating the asphalt to 155-200 ℃, putting the asphalt into the stirring cylinder in S2, stirring for 5-10min at the rotating speed of 1200-1500rpm, and discharging the mixture after uniform stirring. The product prepared by the method has the advantages of effectively reducing track diseases and reducing road maintenance cost.
Description
Technical Field
The invention relates to the technical field of asphalt mixtures, in particular to a repair type high-speed pavement asphalt mixture and a preparation method thereof.
Background
Rutting disease (Rutting) is a road surface damage phenomenon that a driving track of an asphalt road generates large longitudinal permanent deformation under the repeated action of vehicle load, and the main reasons for the Rutting disease are vehicle overload, overlarge traffic volume, insufficient estimation of high temperature in summer in engineering design and the like. Ruts are usually formed in seasons with high temperatures, asphalt softens at high temperatures, the restraint effect on mineral frameworks is reduced, asphalt surface layers generate permanent deformation and viscous flow under repeated rolling of vehicles, and the pavement at the driving track is further compacted and sunk and is accompanied by lateral uplift. The generation of ruts reduces the driving comfort of the road and brings a series of potential safety hazards: the increase of the rutting depth can increase the horizontal transverse component force generated by wheel load, after the air temperature falls back, the surface layer material becomes brittle, and the increased horizontal component force and the indirect bending tensile stress formed by the increased horizontal component force can cause the generation of longitudinal cracks; and the water accumulation in the rut groove after raining is easy to cause the water floating phenomenon of the vehicle, thus threatening the driving safety.
The ruts can be classified into light ruts, transverse corrugated ruts, unstable sandwich ruts and the like, and the following treatment modes are mainly adopted according to the types of the ruts: if only the wheel track is sunken and no bulge exists on the two sides, chiseling a surface layer, chiseling a groove, brushing adhesive layer asphalt and repairing; if the two sides of the wheel track bulge simultaneously, chiseling the bulge part, chiseling the original surface layer at the trough part, coating adhesive layer oil, and paving the mixture same as the surface layer; if the base layer is insufficient in strength and poor in water stability, the base layer needs to be reinforced or the damaged base layer needs to be dug and paved again.
The rut treatment in China can be roughly classified into an excavation and filling method, but the material quantity is large, the supporting equipment is more, the maintenance cost is high, the environment is polluted, the initial maintenance time is long, and the traffic is influenced. Therefore, a new solution is needed to solve the above problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a repair type high-speed pavement asphalt mixture, which has the advantages of effectively reducing track diseases and reducing the road maintenance cost by improving the raw material components of the asphalt mixture, improving the performance of the asphalt mixture and simultaneously having controllable track self-repairing capability.
The second purpose of the invention is to provide a preparation method of the repair type high-speed pavement asphalt mixture, which has the advantages of simple operation and suitability for large-scale production.
In order to achieve the first purpose, the invention provides the following technical scheme:
the repair type high-speed pavement asphalt mixture comprises the following components in parts by weight:
aggregate: 250-300 parts;
asphalt: 25-30 parts;
polyester fiber: preparing;
rubber powder: preparing;
tackifier: 3-8 parts;
adhesive: 3-8 parts;
silicon carbide: 1-5 parts.
Through adopting above-mentioned technical scheme, polyester fiber can play the effect that adds the muscle and toughen and hinder the fracture, simultaneously, has very strong adsorptivity between polyester fiber and the pitch, can adsorb too much free pitch, reduces the mobility of pitch, retrains the lateral displacement who gathers materials, can effectively improve bituminous mixture's high temperature stability to can be great degree prevent that highway from producing the rut. By adopting the polyester fiber and the rubber to be matched for use, the increase of the polyester fiber can reduce the generation of the road ruts fundamentally, and the rubber can endow the road surface with the self-repairing capability after the ruts appear.
More preferably, the rubber powder is prepared by crushing truck waste tires, and the particle size is 20-40 meshes.
By adopting the technical scheme, after the rubber powder is doped, the rubber powder and the asphalt form a grid structure system, the rubber powder particles are diffused into the asphalt and perform a series of physical and chemical reactions, wherein the rubber powder particles absorb oil in the asphalt to swell, the volume is increased, the desulfurization reaction is performed to a certain extent, gel is formed on the surface, the rubber powder core still exists, the network structure formed by the particle core and asphalt molecules is bonded with polyester fibers, and the obtained asphalt mixture has more excellent performance and good anti-rutting performance.
More preferably, the aggregate is limestone and/or basalt.
By adopting the technical scheme, the limestone has good processability, polishing performance and cementing performance, and can have good combination effect with the asphalt; the pavement performance of the asphalt mixture can be improved by adding a certain amount of diabase aggregates; most of the basalt is neutral, has many pores and is hard in texture; when the asphalt mixture is mixed for use, a good matching effect can be achieved, and the integral structural strength of the asphalt mixture is greatly improved. Meanwhile, the particle size of the basalt is larger than that of the limestone, and the basalt and the limestone are both formed by particles with different particle sizes, so that larger gaps are not easily formed among the basalt and the limestone, the whole body is compact, and the asphalt mixture has good and stable structural strength.
More preferably, the asphalt is SBS modified asphalt, chloroprene rubber modified asphalt or butadiene rubber modified asphalt.
By adopting the technical scheme, the modified asphalt is an asphalt binder prepared by adding external additives such as rubber, resin, high molecular polymer, ground rubber powder or other fillers or by adopting measures such as slight oxidation processing of asphalt and the like, so that the performance of the asphalt or the asphalt mixture is improved. In different use environments, the asphalt concrete has the anti-flowing property, namely the anti-rutting capability at high temperature; the flexibility and elasticity, namely the capability of resisting cracking at low temperature are improved; the wear resistance is improved, the service life is prolonged, and the asphalt concrete has good use effect.
Further preferably, the tackifier is selected from two or three of liquid coumarone resin, terpene resin and petroleum resin.
By adopting the technical scheme, the liquid coumarone resin has better tackifying property, softening property and processing property than solid coumarone resin, and has better tackifying effect when used together with an adhesive; the terpene resin has good oxidation resistance and thermal stability, and has good compatibility and solubility with other components; the petroleum resin is named as a petroleum derivative, has the characteristics of low acid value, good miscibility, water resistance, ethanol resistance, chemical resistance and the like, has chemical stability to acid and alkali, and has the characteristics of good regulation and thermal stability, and has the advantage of improving the performance of the adhesive when used together with other tackifiers.
Preferably, the adhesive is epoxy butadiene-acrylonitrile rubber, isoprene rubber or phenolic polyamide.
By adopting the technical scheme, the adhesive is a natural or synthetic, organic or inorganic substance which can connect two or more workpieces or materials together through the actions of interface adhesion, cohesion and the like. The adhesive can tightly adhere other components in the asphalt concrete together, so that gaps are not easy to appear in the asphalt concrete, and the overall structure of the asphalt concrete is more uniform and compact, so that cracking is not easy to occur in the actual application process.
In order to achieve the second purpose, the invention provides the following technical scheme:
a preparation method of a repair type high-speed pavement asphalt mixture comprises the following steps:
s1, putting the aggregate into a drying barrel, stirring at 1500-2000rpm at 100-120 ℃ for 2-2.5h, and drying;
s2, putting the dried aggregate, the tackifier, the adhesive, the rubber powder, the polyester fiber and the silicon carbide into a stirring cylinder, and stirring for 15-30S at the rotating speed of 1500-2000 rpm;
and S3, heating the asphalt to 155-200 ℃, putting the heated asphalt into a stirring cylinder in the S2, stirring at the rotating speed of 1200-1500rpm for 5-10min, and discharging after uniform stirring to obtain the repair type high-speed pavement asphalt mixture.
In summary, compared with the prior art, the invention has the following beneficial effects:
according to the preparation method, the commercial modified asphalt is used as a base, the polyester fiber and the rubber powder are added, the performance of the obtained mixed asphalt is better than that of common modified asphalt, the tackifier, the adhesive and the silicon carbide are added, the obtained asphalt mixture has excellent road performance, and the track disease can be effectively reduced, so that the road oxidation cost is reduced;
drawings
Fig. 1 is a flow chart of a preparation process of the asphalt mixture for the repair type highway pavement in embodiment 1 of the present application.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
Example 1: the repairing type high-speed pavement asphalt mixture comprises the following components in parts by weight as shown in table 1 and shown in figure 1, and is prepared by the following steps:
s1, putting the aggregate into a drying barrel, stirring at 1500rpm and 100 ℃ for 2.5h, and drying;
s2, putting the dried aggregate, the tackifier, the adhesive, the rubber powder, the polyester fiber and the silicon carbide into a stirring cylinder, and stirring for 30S at the rotating speed of 1500 rpm;
and S3, heating the asphalt to 155 ℃, putting the heated asphalt into the stirring cylinder in the S2, stirring for 10min at the rotating speed of 1200rpm, and discharging after uniform stirring to obtain the repair type high-speed pavement asphalt mixture.
In the embodiment, the rubber powder is prepared by crushing truck waste tires, and the particle size is 20-40 meshes.
The aggregate is limestone aggregate with the average grain diameter of 4.25-12.65 mm.
The asphalt adopts SBS modified asphalt.
The tackifier is a mixture of liquid coumarone resin and terpene resin in a weight ratio of 1: 1.
The adhesive is epoxy butadiene-acrylonitrile adhesive.
The above raw materials are all commonly purchased from commercial sources.
Examples 2 to 6: the difference between the repair type high-speed pavement asphalt mixture and the embodiment 1 is that the components and the corresponding parts by weight are shown in the table 1.
TABLE 1 Components and parts by weight of examples 1-6
Example 7: the repairing type high-speed pavement asphalt mixture is different from the embodiment 1 in that the repairing type high-speed pavement asphalt mixture is obtained by the following preparation steps:
s1, putting the aggregate into a drying barrel, stirring at 2000rpm and 120 ℃ for 2h, and drying;
s2, putting the dried aggregate, the tackifier, the adhesive, the rubber powder, the polyester fiber and the silicon carbide into a stirring cylinder, and stirring for 15S at the rotating speed of 2000 rpm;
and S3, heating the asphalt to 200 ℃, putting the heated asphalt into the stirring cylinder in the S2, stirring at 1500rpm for 5min, and discharging after uniform stirring to obtain the repair type high-speed pavement asphalt mixture.
In the embodiment, the rubber powder is prepared by crushing truck waste tires, and the particle size is 20-40 meshes.
The aggregate is a mixture of limestone aggregate and basalt aggregate with the average grain diameter of 4.25-12.65 mm.
The asphalt is chloroprene rubber modified asphalt.
The tackifier is a mixture of liquid coumarone resin, terpene resin and petroleum resin in a weight ratio of 1:1: 1.
The adhesive is isoprene rubber.
The above raw materials are all commonly purchased from commercial sources.
Example 8: the difference between a repair type high-speed pavement asphalt mixture and embodiment 1 is that in the embodiment, the asphalt adopts butadiene rubber modified asphalt; the adhesive is phenolic polyamide.
Comparative example 1: the difference of the high-speed pavement asphalt mixture from the embodiment 1 is that polyester fibers are not added into the asphalt mixture.
Comparative example 2: the difference between the high-speed pavement asphalt mixture and the embodiment 1 is that no rubber powder is added into the asphalt mixture.
Comparative example 3: the difference of the high-speed pavement asphalt mixture from the embodiment 1 is that polyester fiber and rubber powder are not added into the asphalt mixture.
Comparative example 4: the difference between the high-speed pavement asphalt mixture and the embodiment 1 is that the asphalt added into the asphalt mixture is petroleum-based asphalt which is commonly purchased in the market.
Performance testing
The asphalt mixtures obtained in examples 1 to 8 and comparative examples 1 to 4 were subjected to performance tests, and the test results are shown in table 2 below.
As can be seen from the test data in Table 2, the asphalt mixtures of examples 1-8 have better stability and deformation values than those of comparative examples 1-4. The anti-rutting test structures in examples 1 to 8 are all more than 4745 times/mm, and are far higher than the technical index requirements and not less than 3000 times/mm. In the comparative example 1, polyester fibers are not added, and in the comparative example 2, rubber powder is not added, so that the performance of the obtained mixture is inferior to that of the mixtures in the examples 1-8; comparative example 3 neither was added, and the obtained asphalt mixture was inferior in performance to comparative examples 1 and 2; in contrast, in comparative example 4, the asphalt mixture obtained by using the petroleum-based asphalt to refer to the modified asphalt had the worst performance. The asphalt mixture prepared by the method has the advantage of effectively reducing track diseases, and accordingly road maintenance cost can be reduced.
Table 2 results of performance testing
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (7)
1. The repair type high-speed pavement asphalt mixture is characterized by comprising the following components in parts by weight:
aggregate: 250-300 parts;
asphalt: 25-30 parts;
polyester fiber: 0.25-0.5 part;
rubber powder: 10-15 parts;
tackifier: 3-8 parts;
adhesive: 3-8 parts;
silicon carbide: 1-5 parts.
2. The repair type high-speed pavement asphalt mixture according to claim 1, wherein the rubber powder is prepared by crushing truck waste tires and has a particle size of 20-40 meshes.
3. The repair type high-speed pavement asphalt mixture according to claim 1, wherein the aggregate is limestone and/or basalt.
4. The repair type high-speed pavement asphalt mixture according to claim 1, wherein the asphalt is SBS modified asphalt, chloroprene rubber modified asphalt or butadiene rubber modified asphalt.
5. The repair-type high-speed pavement asphalt mixture according to claim 1, wherein the tackifier is selected from two or three of liquid coumarone resin, terpene resin and petroleum resin.
6. The repair type high-speed pavement asphalt mixture according to claim 1, wherein the adhesive is epoxy butadiene-acrylonitrile rubber, isoprene rubber or phenolic polyamide.
7. The preparation method of the repair type high-speed pavement asphalt mixture according to any one of claims 1 to 6, characterized by comprising the following steps:
s1, putting the aggregate into a drying barrel, stirring at 1500-2000rpm at 100-120 ℃ for 2-2.5h, and drying;
s2, putting the dried aggregate, the tackifier, the adhesive, the rubber powder, the polyester fiber and the silicon carbide into a stirring cylinder, and stirring for 15-30S at the rotating speed of 1500-2000 rpm;
and S3, heating the asphalt to 155-200 ℃, putting the heated asphalt into a stirring cylinder in the S2, stirring at the rotating speed of 1200-1500rpm for 5-10min, and discharging after uniform stirring to obtain the repair type high-speed pavement asphalt mixture.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113372041A (en) * | 2021-07-13 | 2021-09-10 | 上海繁荣道路建设工程有限公司 | Asphalt mixture and preparation method thereof |
| CN114956667A (en) * | 2022-04-13 | 2022-08-30 | 宁波东兴沥青制品有限公司 | Low-temperature modified asphalt concrete and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109265076A (en) * | 2018-09-08 | 2019-01-25 | 平湖市中建沥青混凝土工程有限公司 | A kind of rubber asphalt concrete and its preparation process |
| CN109437673A (en) * | 2018-12-04 | 2019-03-08 | 河南省交通规划设计研究院股份有限公司 | A kind of rubber powder modified asphalt mixture and preparation method thereof |
-
2020
- 2020-07-10 CN CN202010663268.9A patent/CN111747687A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109265076A (en) * | 2018-09-08 | 2019-01-25 | 平湖市中建沥青混凝土工程有限公司 | A kind of rubber asphalt concrete and its preparation process |
| CN109437673A (en) * | 2018-12-04 | 2019-03-08 | 河南省交通规划设计研究院股份有限公司 | A kind of rubber powder modified asphalt mixture and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113372041A (en) * | 2021-07-13 | 2021-09-10 | 上海繁荣道路建设工程有限公司 | Asphalt mixture and preparation method thereof |
| CN114956667A (en) * | 2022-04-13 | 2022-08-30 | 宁波东兴沥青制品有限公司 | Low-temperature modified asphalt concrete and preparation method thereof |
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Application publication date: 20201009 |
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