KR101630835B1 - The Composition and Manufacture method Asphalt Flowability It can be prepared in Using the cooker Construction site Apply wet surfaces - Google Patents

Abstract

The present invention relates to a high-fluidity mastic asphalt composite, and more specifically, to a manufacturing method of high-fluidity mastic asphalt using wet surface application and a construction site cooker capable of manufacturing high-fluidity mastic asphalt without building up manufacturing facilities on site by injecting a material such as a modifying agent, an additive into an asphalt mixture using a cooker used in an asphalt pavement construction site by comprising: a step of preparing a mastic asphalt composite having typical asphalt, natural asphalt, a polymer modifying agent, a fluidity modifying agent and a surfactant by mixing aggregates and asphalt binders; a step of injecting a fluidity modifying agent (for example, US′s Astra Was 3816) into a cooker used for a construction site; a step of injecting natural asphalt (for example, T.L.A or Gilsonite) into the cooker and mixing the mixture for 5 minutes; a step of injecting a polymer modifying agent into the cooker and mixing the mixture for 5 minutes; a step of injecting a general dense-graded asphalt mixture wherein the aggregates and the asphalt binders are mixed and heating up the mixture for 5 minutes; and a step of injecting a surfactant (for example, Akzo Nobel′s an amine-based surfactant) and mixing the mixture for 15 minutes.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing high-mismatch asphalt and a composition therefor,

The present invention relates to a high-mobility mastic asphalt composition, and more particularly, to a mastic asphalt composition using a cooker used in an asphalt pavement construction site, in which raw materials such as a specific modifier and additives are put into the existing asphalt mixture, The present invention relates to a process for preparing high molecular weight mastic asphalt which can be produced by using a wetting surface and a construction site cooker so as to produce high molecular weight mastic asphalt,

Conventional mastic asphalt pavement consists of a composite pavement consisting of two layers: a mastic asphalt layer with a thickness of 4 cm and a modified asphalt layer with a thickness of 4 cm. Here, conventional mastic asphalt for 4 cm mastic asphalt underlayment is TLA (Trinidad

Lake Asphalt is mixed with about 30% of common petroleum asphalt. TLA should be imported from foreign countries because it is expensive and it is impossible to improve the physical properties. In addition, there is a high possibility that deformation of the steel plate may occur during the application due to the high temperature of the construction temperature of 230 ° C to 250 ° C, and the heat of the high temperature can not escape to the outside of the package after the construction, The phenomenon may cause a problem that the adhesion between the steel plate and the pavement is reduced, so that the pavement is damaged immediately after the construction.

The mastic asphalt used in this way is a highly flowable asphalt mixture with a porosity of less than 1%, which is used for concrete pavement and waterproof pavement of steel plate.

Conventional mastic asphalt is named as Guss asphalt, which is the first name of the product, and has been widely used in Korea. However, it has recently been converted into mastic asphalt and has been used as a waterproof layer of all roads such as steel bridge bridges, concrete bridges, concrete pavements, Excellent is confirmed.

However, the conventional mastic asphalt requires a stirrer and a conveying device called a cooker at the time of manufacture and construction, and the stirring and transportation time is usually 1 to 2 hours, which consumes a lot of time and costs, which is inefficient.

In addition, the domestic asbestos maker producing mastic asphalt is not yet very popular, and the production temperature is higher than 200 ℃ (normal use temperature 230 ~ 250 ℃) and most companies can not produce it because of lack of facilities.

Therefore, the current production of mastic asphalt is problematic in that a small number of domestic producers are required to transport a long distance, the price increases due to the transportation transaction, the consumption of energy and the generation of pollutants.

The mastic asphalt binder composition of the prior art (Japanese Patent Registration No. 10-1513765, filed on Apr. 14, 2015, Apr. 14, 2015) and a method for producing the mastic asphalt binder composition, , 2-15 parts of a polymer modifier, 4-15 parts of a reinforcing agent, and 0-0.5 parts of a stabilizer.

The mastic asphalt binder composition of the prior art is excellent in plastic deformation resistance, fatigue crack resistance, and workability, and has excellent thermal stability under temperature conditions of 230-250 ° C. Therefore, it can be used for a steel plate bridge, a drainage- It is described that it is suitable to use as an impermeable asphalt mixture for the purpose of waterproofing such as repairing and semi-rigid packaging. As described above, since the slurry is applied at a high temperature of 230-250 ° C, it causes deformation of the steel plate due to the high temperature. Since the high temperature heat does not escape to the outside of the package after the application, There is a problem that a part of the body is swollen and also the adhesion force between the steel plate and the package is reduced so that it is damaged immediately after the construction. In particular, a cooker for heating to a high temperature must be prepared. Since it is not a cooker used for construction but is used by a special purpose, there is a small demand, and a stirring and conveying device is required, and stirring and transportation time are long, which is inefficient.

The present invention confirms that a conventional cooker used for long-time conveyance in the open field is a very efficient production facility, and it is possible to produce mastic asphalt to be produced on site regardless of whether the production facility is installed or not ≪ / RTI >

Korean Patent Publication No. 10-1513765

As a means for solving the above problems, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a cooker for use in an on- The purpose of this project is to produce mastic asphalt,

Also, the object of the present invention is to provide a waterproof coating film which can be adhered to a base surface exposed to a wet surface and can be applied to a waterproof coating film having a uniform thickness at the time of construction, has no falling down in the vertical surface construction, To prevent falling The present invention provides a process for producing a high molecular weight mastic asphalt which can be produced by using a wet surface and a cooker on a construction site, and a composition thereof.

In order to solve the above-mentioned problems,

Preparing a composition comprising a general asphalt mixed with an aggregate and an asphalt binder, a natural asphalt, a polymer modifier, a flow improver, and a surfactant;

A step of applying a fluidity improving agent (using Astra Wax 3816 of the United States among PE wax) used in a construction site;

The above-mentioned natural asphalt (T.L.A: imported acid from Trinidad or Gilsonite: Iranian acid) is added and heated and mixed at 180-200 ° C for 5 minutes.

Adding the natural asphalt to a polymer modifier (KTR 401, KKP) after the mixing and mixing, and then heating and mixing at 90 to 220 ° C for 5 minutes;

(WC-1) mixed with an aggregate and an asphalt binder, and heating and mixing the mixture at 60 to 190 ° C for 5 minutes;

After the above-mentioned general asphalt mixture is added, a surfactant (an amine surfactant for the asphalt addition of Akzo nobel) is added, followed by heating and mixing at 180 to 220 ° C for 15 minutes to prepare a high molecular weight mastic asphalt.

Wherein the asphalt composition comprises 85.00 to 98.25% by weight of general wheat asphalt (WC-1), 1 to 5.0% by weight of natural asphalt, 0.05 to 5% by weight of a polymer modifier, 0.01 to 2.0% by weight of a flowability improver, .

The present invention as described above enables the production of mastic asphalt using a cooker used for on-site pavement construction regardless of whether or not a production facility is installed, and at the same time, it is possible to manufacture a high-viscous mastic asphalt It is.

The present invention relates to a method for producing a mastic asphalt mixture (WC-1) by directly introducing a polymer asphalt modifier, a flow improver, natural asphalt, a surfactant, etc. into a conventional cooker, And a durable mastic asphalt composition and a wetting surface of a construction site including a surfactant, and it is possible to use the surface layer of a general asphalt mixture as it is and to shorten the cooking time of a cooker There is an economical effect that cost can be reduced by manufacturing mastic asphalt.

Fig. 1 is a view showing a process for producing mastic asphalt which can be applied to a wet surface using the cooker of the present invention.

Hereinafter, embodiments of the present invention will be described in detail.

The present invention provides a mastic asphalt manufacturing method and a mastic asphalt composition which can be applied to a wet surface and can be manufactured using existing cookers at a construction site.

In order to apply the above method, it is necessary to complete the effective mixing of the commonly used asphalt mixture and the mastic asphalt additive contained therein, and in addition, The loss and quality of the product vary.

Therefore, the present invention systemizes the optimum composition of each material and the process sequence of compounding. First of all, in order to secure the water resistance and durability, it is necessary to use an appropriate amount of natural asphalt. Generally, in the case of domestic, the amount of mastic asphalt is 25% by weight based on the total weight.

The natural asphalt used is a performance grade grade of PG (Performance Grade), which is 22 ~ 76% or 22 ~ 82% polymer modifier and hard asphalt with an asphalt binder or penetration of 4 or less.

In addition, the mixture according to the finished mixture is produced in a B / P (batch plant), and then the mixture is put into a cooker in a mixer, and the aging time required for securing complete workability generally takes 1 to 2 hours. On the other hand, in the case of the surface asphalt mixture (WC-1) used for the surface layer or the middle layer of the general road, the normal asphalt binder of AP-3 or AP-5 (Asphalt-5) Asphalt or polymer modifier needs to be added or subtracted.

The present invention relates to an asphalt mixture (WC-1) for a surface layer, which is used in the field, and the amount of the modifier and additive is determined according to the condition of the asphalt binder and the aggregate, It was confirmed that the cooking time can be shortened according to the order of putting into the cooker.

At this time, the particle size distribution of the aggregate should follow the aggregate particle size distribution of mastic asphalt, and the production process of WC-1 may be produced according to the process of Ascon company.

Also, the production temperature may be 160 ° C, which is the production temperature of a general asphalt mixture.

The composition of the composition of the present invention is shown in Table 1 based on 22 to 76% or 22 to 82% of the modifier for asphalt binders AP3 and AP5, hard asphalt and PG, (1) fluidity improver, (2) natural asphalt, (3) polymer modifier, (4) general wheat grain asphalt mixture (WC-1) and (5) surfactant in the order of the pressure of the cooker Respectively.

Generally, the pressure at the most suitable cooker is between 100 and 200 bar. If it is less than 100 bar, separation between aggregate and asphalt binder can occur. If it is higher than 200 bar, it is impossible to work in asphalt paver or porosity of mastic asphalt mixture is 2% ≪ / RTI >

The amount of WC-1 asphalt mixture used is 85.00-98.25 wt%. If the amount of the WC-1 asphalt mixture is larger than 98.25 wt%, it is difficult to produce mastic asphalt. If the WC-1 asphalt mixture is less than 85.00 wt%, the economical efficiency may deteriorate. Especially, Mixing ratios are very important because they are sensitive enough to cause differences.

 In addition, surfactants for wetting surfaces can use anions, amphoteric ions and amphoteric ions, but HLB is preferably 3 to 11. However, the asphalt binder may be calculated by inverting the content of the asphalt WC-1 for road pavement, not by a separate input, or by using the asphalt content value measured by using the thermal heat loss method, which is a test method for burning the asphalt at a high temperature.

It is preferable that natural asphalt has a softening point of 90 to 200 ° C in natural asphalt such as TLA ( TLA: Trinidad Lake Asphalt) and Gilsonite.

In addition, the amount of asphalt binder in the asphalt mixture WC-1 for packaging is generally 4 to 6 wt%, and the amount of natural asphalt to be added later should be 1 to 5 wt% of the total weight.

When the amount of natural asphalt is less than 1 wt%, the amount of the polymer modifier for the replacement of the binder is relatively increased and the price is expensive. When the asphalt is higher than 5 wt%, the asphalt is mixed with asphalt in the winter Brittle fracture can occur. A preferable use ratio is 1 to 3.5 wt%.

If the asphalt binder content of WC-1 is less than 4%, add natural asphalt and polymer modifier, and if it exceeds 6%, add the natural asphalt only to evaluate the final physical performance of the mastic asphalt mixture.

The polymer modifier may be a thermoplastic polymer such as SBS rubber, polyacylate, PE, or PP, and should have a mp of 80 to 220 ° C. If the melting temperature is lower than 80 ° C, the mixture can be easily deformed to high temperatures in summer after being laid on the road, and when higher than 200 ° C, brittle fracture can occur due to the temperature drop in winter. The preferred temperature range is 90 to 200 占 폚.

The amount of the polymer modifier used is 0.05 to 5 wt%, and when the amount of the polymer modifier is less than 0.05 wt%, the low temperature stability of the mixture is difficult to expect, and when it is higher than 5 wt%, the mixture is not economical. However, in the case of the modified asphalt binder used by melting in the binder, when the binder is melted by 30% or more of the binder, the viscosity becomes too high. However, in the case of adding the modified asphalt mixture to the asphalt mixture separately, Highly usable.

Finally, olefin wax is used as the fluidity improver used for fluidity improvement, and when the olefin type is not used, the summer package can be easily deformed.

In the case of olefins, it is bonded by the ions of sulfur and iron mixed in the asphalt, If it is less than 0.01, it is difficult to improve the fluidity, and when it is more than 2%, the dynamic stability value may be deteriorated. The mixing ratio of the fluidity improver is preferably 0.05 to 0.15% by weight.

The melting point of the wax should be 60-190 캜, preferably 60-160 캜. If it is used at a temperature lower than 60 ° C, the deterioration in workability at the time of cooking is rapid, and when the temperature is 190 ° C or higher, the workability improvement effect may not be large.

After all the dosing methods have been improved, they must be put in accordance with the process flow chart of Fig. If the order of injection is changed, the desired workability can not be obtained or the performance of the produced mastic asphalt may be deteriorated.

In case of surfactant, asphalt is a hydrophobic material, which is the most important factor when applied to the wetting surface. Therefore, it is preferable that hydrophobicity is high. However, cationic surfactant such as quaternary ammonium salt, sulfoxonium or sulfonium salt, phosphonium salt, An anionic surfactant such as an amino acid salt, a sulfate or a sulfonate, or a nonionic surfactant such as an ether, an ester, or an amide type may be used or a combination thereof may be used.

However, if their usage is increased, there may be a problem in water resistance. If it is less than 0.01 wt%, it is difficult to exert its performance when it is applied to the wet surface. If it is more than 3 wt%, it may cause a problem in water resistance of the asphalt mixture. The preferred amount is 0.05 to 0.15 wt.% And the preferred HLB is 4 to 12.

The composition of the mastic asphalt of the present invention,

1 to 5% by weight of natural asphalt,

0.05 to 5% by weight of a polymer modifier,

0.01 to 2% by weight of a flowability improver,

0.01 to 3% by weight of a surfactant,

 Asphalt mixture (WC-1) 98.93 ~ 85.00 wt%

(Binder in the WC-1 mixture: 4-6 wt% aggregate: 94-96 wt%).

Composition Composition - 100% by weight.

Table 1 below shows the composition of the examples of the present invention, and Table 2 shows the physical properties of mastic asphalt with respect to the cooking time and the physical properties of the specimens used at the time of installation. Table 3 is the test standard for mastic asphalt. As shown in Table 2, the workability index of mastic asphalt, which is a workability index, can be worked only if the result is less than 20 seconds.

However, in the case of the conventional method, a hard asphalt mixture which can not be subjected to the fluidity test which can not be practically performed until 30 minutes after the production was obtained. On the other hand, Test results were obtained. This shows that the construction can be completed immediately within 30 minutes of manufacturing, which can greatly reduce the time and fuel cost required for cooking in actual construction. In addition, the results exceeded all the physical properties required for mastic asphalt.

Therefore, when the present invention is used, it is possible not only to convert WC-1, which has been immediately transported from the ascon facility of the suburban area, to mastic asphalt in mountainous areas or suburbs with poor facilities, It is not necessary to change the temperature or change the temperature, which is remarkably convenient and economical.

Furthermore, the adhesion strength after application to the wet surface was measured to be 0.7 MPa in the comparative example, while in the case of the present invention, the adhesion strength was superior to 1.4 MPa in the case of the present invention.

※ Natural asphalt used T.L.A for Examples 1 and 2 and Gilsonite for Examples 3 and 4. T.L.A was imported from Trinidad and Gilsonite imported from Iran. KTR 401 was used as a polymer modifier, Astra Wax 3816 of PE Wax was used as a fluidity improver, and amine surfactant for use of asphalt of Akzo nobel was used as a surfactant.

As shown in Table 1, the asphalt binder WC-1 was prepared in an amount of 4 to 6% by weight as shown in the examples, and the natural asphalt mixture WC-1 was mixed with natural asphalt, polymer modifier, , And surfactant were added in the order of the present invention to complete a mastic asphalt mixture.

Table 2 shows Example 1 to Example 9 in which the physical properties of mastic asphalt and the physical properties of the specimens used at the time of installation were evaluated according to the cooking time.

Table 3 shows mastic asphalt standards.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a method for producing a mastic asphalt mixture (WC-1), which comprises introducing a polymer asphalt modifier, a flowability improver, natural asphalt, There is an advantage that a mastic asphalt composition excellent in impermeability and durability can be provided without any facility.

In addition, it can be applied to the wet side of the construction site including the surfactant, and it is economically advantageous to reduce the cost by using mastic asphalt mixture for the surface layer and to shorten the cooking time of the cooker. have.

Claims (5)

The process for producing a high-viscous mastic asphalt,
Preparing a composition comprising a general asphalt mixed with an aggregate and an asphalt binder, a natural asphalt, a polymer modifier, a flow improver, and a surfactant;
Adding a fluidity improver made of an olefin wax having a melting point of 60 to 190 DEG C by using a cooker used in a construction site and heating;
Adding natural asphalt having a softening point of 90 to 200 캜 among natural asphalt to the cooker into which the flow improver is added, heating and mixing at 180 to 200 캜 for 5 minutes,
Adding the natural asphalt to a cooker, adding a polymer modifier comprising thermoplastic polymer, mixing the mixture at 90 to 200 ° C for 5 minutes,
(WC-1) mixed with an aggregate and an asphalt binder, and heating and mixing the mixture at 60 to 190 ° C for 5 minutes;
Adding the surfactant mixture to the mixture, and heating and mixing the mixture at 180 to 220 ° C for 15 minutes,
The mastic asphalt composition prepared by each of the above steps is added to a cooker in the order of (1) flowability improver, (2) natural asphalt, (3) polymer modifier, (4) ordinary wheat grain asphalt mixture (WC-1) And a method for producing a high-mismatch asphalt which can be produced by using a cooker on a construction site. delete The process for producing a high-flowability mastic asphalt composition according to claim 1, wherein the asphaltic mastic asphalt composition comprises 85.00 to 98.25% by weight of general-grained asphalt (WC-1), 1 to 5% by weight of natural asphalt, 0.05 to 5% by weight of a polymer modifier, 0.01 to 2% by weight of a surfactant, and 0.01 to 3% by weight of a surfactant.




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