KR101440937B1 - Binder composition for repairing asphalt pavement and repairing composition containing therof - Google Patents

Abstract

The present invention relates to a binder composition for asphalt pavement repairing, and a repairing composition using the same. More specifically, the present invention relates to a binder composition for repairing asphalt pavement, Oxidation type asphalt repairing material.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a binder composition for asphalt pavement repairing and an asphalt pavement repairing composition containing the asphalt pavement repairing composition,

The present invention relates to a binder composition for asphalt pavement repairing, and a repairing composition using the same. More specifically, the present invention relates to a binder composition for repairing asphalt pavement, Oxidation type asphalt repairing material.

Asphalt paved roads are gradually damaged due to ongoing vehicle traffic after construction, aging of asphalt over time, and increased precipitation due to climate and environmental changes. Recently, the traffic volume of heavy and overloaded vehicles has been increasing in downtown area due to the reconstruction of urban areas, and pavement damage has also occurred frequently.

Pavement damage areas must be repaired in a timely manner to maintain the pavement layer continuously. If this is not the case, if the damaged area is gradually enlarged, it will cause traffic accidents, and in the event of a sudden flood, large-scale repair will be required, resulting in a great economic loss. Asphalt pavement roads vary in their lifespan depending on how they are maintained. Therefore, it is very important to select an appropriate maintenance period and repair method for pavement roads.

In case of damage to the asphalt road, repair it with emergency repair asphalt repair material. The method of work is to pour the repair material on the damaged area, to step on the foot, to press with a heavy load roller, or to flatten by tapping with a heavy manual compaction machine. Emergency repair asphalt repair materials consist of binder, auxiliary binder, solvent, aggregate, and other additives. The required properties are convenient construction and fast strength development. Specifically, excellent physical properties should be provided in terms of fluidity, compaction property, cohesiveness between materials, reactivity, crosslinkability, storage stability, and the like. However, since these properties are closely related to each other, it is not easy to make all properties good by simple prescription.

Until now, in order to improve the fluidity of the asphalt pavement repair material composition, a method of mixing a solvent, mineral lubricating oil or vegetable oil has been generally used (refer to Korean Patent Publication No. 10-0880030). Solvents mainly used kerosene, light oil, and heavy oil. However, when the organic solvent is used in excess, the fluidity of the repair material composition is improved, but the bonding strength is lowered due to the lack of cohesive force, and excessive use of the solvent causes environmental pollution problem. In addition, a method using a mineral lubricating oil such as engine oil imparts lubricity, but decreases the bonding strength as in the case of using a solvent. When vegetable oil is used, lubrication effect can be obtained at the initial stage of mixing, but vegetable oil is not good in compatibility with asphalt, and phase separation is gradually caused to deteriorate storage stability and lubrication effect.

Korean Patent No. 629902 relates to an epoxy resin composition for asphalt pavement and more particularly to a diglycidyl ether bisphenol-A type epoxy resin having a molecular weight of 300 to 1,500 and having two or more epoxide groups in the molecular structure, (Phenol Novolac Polyglycidyl Ether) epoxy resin having a number average molecular weight of 500 to 2,000 and an epoxy group content of not less than 2.2 in the molecular structure, and using a polyamine as a curing agent. Crack resistance and the like. This invention is particularly useful for bridge girder pavement. However, asphalt pavement is not suitable for emergency maintenance.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a composition for asphalt pavement repairing that is excellent in workability and strength.

The present inventors have developed a technique of adding an epoxy ester resin to an asphalt mixture to improve the fluidity and the terminal strength of the asphalt pavement repairing composition. More specifically, an oligomer-type reactant obtained by reacting an unsaturated fatty acid with both ends of an epoxy resin is added to an asphalt repair material. In this way, initially, the asphalt mixture gives fluidity to the asphalt mixture to improve the compaction, and later the double bonds attached to the molecular chain react with oxygen in the air to crosslink the molecules to improve the strength of the material.

In the present invention, a method of mixing an epoxy ester resin as shown in Formula 1 was used for the asphalt pavement repairing composition. This is a reaction product obtained by addition reaction of an unsaturated fatty acid and an organic acid to an epoxy resin. In order to improve the physical properties, the epoxy ester resin was mixed in the range of 5 to 10% of the total binder components.

When the thus prepared repellent composition is used, the fluidity improves initially due to the effect of the unsaturated fatty acid mixture, and the double bond of the unsaturated fatty acid reacts with oxygen in the air, thereby increasing the crosslink density and increasing the strength. The double bonds of unsaturated fatty acids are bound to oxygen in the air within at least 10 days when exposed to air.

(In the above formula, R is an alkenyl group of an unsaturated fatty acid, n = 1 or 2.)

The present invention relates to an asphalt pavement repairing material comprising 3-10% by weight of a binder and 90-97% by weight of an aggregate, wherein the binder comprises 5-10% by weight of an epoxy ester resin based on 100% by weight of the binder as a whole. To a repair material composition.

The present invention also relates to an asphalt packaging and repairing composition, wherein the binder comprises 70 to 80% by weight of an asphalt, 5 to 10% by weight of an epoxy ester resin, and 15 to 20% by weight of a solvent.

The present invention also relates to an asphalt packaging and repairing composition characterized in that the epoxy ester resin is obtained by reacting 20 to 60% by weight of a bisphenol-type epoxy resin having an equivalent weight of 500 or less and 40 to 80% by weight of an unsaturated fatty acid.

The present invention also relates to a method for producing a polylactic acid composition, wherein the unsaturated fatty acid is selected from the group consisting of Myristoleic acid, Palmitoleic acid, Sapienic acid, Elaidic acid, Vaccenic acid, Oleic acid linoleic acid, alpha-linolenic acid, arachidonic acid, eicosapentaenoic acid, erucic acid, docosahexanoic acid, and the like. (Linoelaidic acid). The present invention relates to an asphalt pavement repairing composition.

The present invention also relates to a binder composition for asphalt pavement repair comprising 70 to 80% by weight of asphalt, 5 to 10% by weight of an epoxy ester resin and 15 to 20% by weight of a solvent.

The present invention is further characterized in that the epoxy ester resin is obtained by reacting 20 to 60% by weight of a bisphenol-type epoxy resin having an equivalent weight of 500 or less and 40 to 80% by weight of an unsaturated fatty acid.

In addition, the present invention is characterized in that the unsaturated fatty acid is a fatty acid having an aliphatic tail of 6 or more carbon atoms.

The present invention also relates to the use of the above-mentioned unsaturated fatty acids in the preparation of a composition for oral administration, wherein the unsaturated fatty acid is selected from the group consisting of myristoleic acid, palmitoleic acid, saponinic acid, elaidic acid, leuconic acid, oleic acid, linoleic acid, linolenic acid, arachidonic acid, icosapentaenoic acid, erucic acid, And linoleic acid.

According to the present invention, an epoxy ester resin obtained by reacting an unsaturated fatty acid with an epoxy resin is added to an asphalt pavement repairing composition to obtain a maintenance material mixture having excellent flowability, aggregate durability, and terminal strength.

In the present invention, the asphalt pavement repairing composition comprises 3-10 wt% binder and 90-97 wt% aggregate. The binder component comprises 70-80 wt% of asphalt, 0-10 wt% of auxiliary binder, and 15-20 wt% of solvent. If necessary, the binder may contain 1-3 wt% of other additives.

Hereinafter, the asphalt package repairing composition of the present invention will be described in detail.

As the asphalt, one or more kinds of various asphalt such as natural asphalt, straight asphalt and blown asphalt can be used without any particular limitation. The amount used is 70 to 80% by weight of the total binder components. The most common of these is straight asphalt. Straight asphalt is obtained by distillation of crude oil in an atmospheric distillation column, and finally distillation of the residual oil by vacuum distillation. It is excellent in oxidizing property, polymerizing property, adhesiveness, water resistance and is mainly used as an organic binder.

In the prior art, various resins such as a petroleum resin, a urethane resin, an alkyd resin, and an epoxy resin have usually been used as auxiliary binders. Examples of usable resins include R-1100, P-90S, Quinton 1500 and CX-495 of Nion-Zeno, and DR-400 and DR DS-7301-F, DS-9280-H and DS-7334-G of DF Corp. as the M-200, LL and alkyd resin of Kumho Mitsui Co., YD-128, YD-134 and YD-011 of Kagaku Kogyo Co., Ltd. Use of these auxiliary binders alone or in an appropriate mixture can improve strength, adhesiveness, cohesion and the like. The amount of the auxiliary binder used is 5 to 10% by weight of the total binder component. Outside this range, viscosity increases and fluidity deteriorates, phase separation may occur, and storage stability may deteriorate.

In the present invention, an epoxy ester resin was specifically used as an auxiliary binder component. This is the same as the structure of the above formula (1), which is obtained by addition reaction of an unsaturated fatty acid to an epoxy resin. Epoxy resin has good compatibility with asphalt and is widely used to improve the strength, heat resistance, chemical resistance and hardness of asphalt mixture. Unsaturated fatty acids are mainly composed of oleic acid, linoleic acid, linolenic acid, etc. These are mostly contained in drying oil such as linseed oil, sunflower oil, paulownia oil and perilla oil. When the unsaturated fatty acid is mixed into the asphalt mixture, the chain is long and slippery, so it acts as a lubricant. The mixing effect of the unsaturated fatty acids makes the asphalt mixture to have good fluidity, thereby providing excellent aggregate compaction effect and high stability. In the present invention, an unsaturated fatty acid is used by reacting with an epoxy resin having good compatibility with asphalt. This improves fluidity, and later the double bonds present in the unsaturated fatty acids combine with oxygen in the air to cause cross-linking between the molecules, resulting in increased strength.

No particular limitation is imposed on the epoxy resin in the present invention. Specific examples of the epoxy resin include Epikote (TM) 828, 827, 834 and 1001 of Shell, DER (TM) 331, 334 and 336 of Dow Chem. , YD (TM) -128, 127, 134, 011 of Kukdo Chemical Co., Ltd. can be used. Aliphatic epoxy resins such as Epikote (TM) 815 available from Shell and YD (TM) 115 available from Kukdo Chemical Co., Ltd. may also be used in some cases, but aliphatic epoxy resins are less compatible with asphalt than aromatic epoxy resins. When a fatty acid having a molecular weight of 1,000 or more is used, too large molecules are formed when the fatty acid is reacted, resulting in poor fluidity. The amount of epoxy resin available is 20-60 wt% of the total binder composition.

As the unsaturated fatty acid, an unsaturated fatty acid having an aliphatic tail having 6 or more carbon atoms can be used. More specifically, for example, there may be used Myristoleic acid, Palmitoleic acid, Sapienic acid, It has been found that the amount of the compound of formula (I) in the present invention is preferably at least one selected from the group consisting of Elaidic acid, Vaccenic acid, Oleic acid, Linoleic acid,? -Linolenic acid, Arachidonic acid, Eicosapentaenoic acid, At least one selected from the group consisting of erucic acid, docosahexanoic acid and linoelaidic acid may be used. The unsaturated double bonds of unsaturated fatty acids are easily oxidized and crosslinked with oxygen in the air. In the reaction, the molar ratio between the epoxy resin and the unsaturated fatty acid is preferably 1 / 2-1 / 3. The epoxy ester resin is obtained by reacting 20 to 60% by weight of a bisphenol-type epoxy resin having an equivalent weight of 500 or less and 40 to 80% by weight of an unsaturated fatty acid.

For the reinforcement of asphalt pavement strength, epoxy ester resin may be mixed with polyvalent organic acid. Examples of polyvalent organic acids that can be used include adipic acid, fumaric acid, maleic acid, and malonic acid. However, if too much polyvalent organic acid is used, the viscosity becomes high, the fluidity is deteriorated, the air oxidizing property is deteriorated, and the solubility in asphalt deteriorates. The amount of the polyvalent organic acid used is 1-5 wt% of the total epoxy ester resin.

Examples of catalysts for synthesizing an epoxy ester resin include N, N-dimethybenzylamine (BDMA), triethylamine (TEA), triphenylphosphine (TPP), cetyltrimethylammonium bromide (CTMAB), dinormalbutylamine -mormal butylamine) can be used. The amount used is 0.1-0.5 phr for the total reactants.

Epoxy ester resin was synthesized by adding epoxy resin, unsaturated fatty acid, organic acid and catalyst to the reactor in order, raising the temperature to 150-170 ℃ and then measuring the viscosity and acid value every hour while it was reacting at a constant temperature at this temperature. When the acid value reached 20-30, the temperature was cooled to 50 ° C or lower and packed.

The air-oxidized epoxy ester resin used in the binder composition of the present invention has good flowability and has a good initial compaction effect. After compaction, the air-oxidized epoxy ester resin binds with oxygen in the air to cause crosslinking between the molecules to polymerize the binder, do. An appropriate amount of the epoxy ester resin is 5-10% by weight of the total binder component. If the amount is less than 5% by weight, the effect is insignificant due to a small amount used, and if the amount is more than 10% by weight, fluidity is improved and workability is improved but stability is decreased.

Gasoline, kerosene, light oil, heavy oil, etc. may be used as the solvent for the asphalt repair material mixture. As the aromatic solvent, benzene, toluene, xylene and the like can be used. Examples of the ketone-based solvent include acetone, methyl ethyl ketone, and methyl isobutyl ketone. If you use a lot of solvents, fluidity improves, but initial stability deteriorates. The solvent serves to lower the viscosity of the asphalt, which is the main material, to smooth the operation at room temperature. If the amount of the solvent used is less than 15% by weight, the mixture can not flow smoothly at room temperature due to too little use. If the amount is more than 30% by weight, the curing time is delayed due to the residual volatile components. A suitable amount of the solvent is 15 to 20% by weight of the total binder component.

Other additives include flow improvers, thickeners, adhesion promoters, and plasticizers. Wax, vegetable oil, process oil and the like can be used as the fluidity improving agent. As the wax, paraffin wax, carnauba wax, polyethylene wax, polyamide wax and the like can be used. Wax improves the coating thickness of aggregate during the preparation of the repair material composition and improves the workability at the time of construction by helping the lubricant of the aggregate and the binder. Vegetable oils include flaxseed oil, sunflower oil, paulownia oil, and perilla oil. There is no particular restriction on the process type. For example, SK's Pro-300 ™, AC-12 ™, and Lequios 150 ™ from Ildong Alliance Co., Ltd. can be used. An appropriate amount of the lubricant is 0.5 to 1 wt% of the total binder component. In case of mixing more than 1% by weight, the strength of the asphalt is lowered by weakening the binding force of the asphalt. As the thickening agent, particulate silica such as airosil or bentonite can be used. An appropriate amount is 0.5 to 1% by weight of the total binder component. As the plasticizer, dibutyl phthalate (DBP), dioctyl phthalate (DOP), dicresyl phthalate (DCP) and the like can be used. These give flexibility and tackiness to the binder. However, too much use causes a decrease in strength. A suitable amount to be used is 0.5 to 1% by weight of the total binder composition.

Granite, gneiss, sand and recycled aggregate can be used as the aggregate. The aggregate serves as an additive to the strength of the asphalt pavement. Aggregate is added so that it occupies 93 to 95% by weight of total asphalt repair material. The size of aggregate is mainly 6-8mm, and even 10mm size can be used. The particle size distribution of the aggregate affects fluidity and strength. In order to improve the compaction property, it is possible to mix coarse aggregate of 6-8mm and aggregate of 0.3-1mm size. Mixing ratio of coarse aggregate and fine aggregate is preferably 5/5 - 7/3. In order to improve the fluidity, the aggregate may be used in the form of a spherical shape. The aggregate used is to comply with the coarse aggregate quality standard for KS F 2357 bituminous mixture and the fine aggregate quality standard for KS F 2358 bituminous mixture.

The asphalt repair materials were prepared as shown in the following table. The experiment was divided into Examples and Comparative Examples.

≪ Example 1 >

190 g of epoxy resin, 361 g of linolenic acid and 0.7 g of triethylamine (TEA) were placed and reacted at 150 DEG C for 6 hours to obtain an epoxy ester resin having an acid value of 30 and a viscosity of 5.2 poise.

12 g of kerosene and 6 g of epoxy ester resin obtained by the above reaction were added to 56 g of straight asphalt and mixed. 651 g of 6-8 mm aggregate, and 279 g of 0.3-0.5 mm aggregate were put in this and mixed. The mixture was subjected to a physical property test as shown in Table 2.

≪ Example 2 >

250 g of epoxy resin, 333 g of linolenic acid and 0.6 g of N, N-dimethylbenzylamine (BDMA) were placed and reacted at 155 캜 for 5 hours to obtain an epoxy ester resin having an acid value of 19 and a viscosity of 6.2 poise.

12 g of kerosene and 6 g of the epoxy ester resin obtained in the above reaction were added to 56 g of straight asphalt and mixed. 651 g of 6-8 mm aggregate, and 279 g of 0.3-0.5 mm aggregate were put in this and mixed. The mixture was subjected to a physical property test as shown in Table 2.

≪ Example 3 >

190 g of epoxy resin, 308 g of linoleic acid, 12.3 g of adipic acid and 0.7 g of triphenylphosphine (TPP) were placed and reacted at 160 캜 for 7 hours to obtain an epoxy ester resin having an acid value of 22 and a viscosity of 6.8 poise.

12 g of kerosene and 6 g of the epoxy ester resin obtained in the above reaction were added to 56 g of straight asphalt and mixed. 651 g of 6-8 mm aggregate and 279 g of 0.3-0.5 mm aggregate were added to the mixture and mixed. The mixture was subjected to a physical property test as shown in Table 2.

≪ Comparative Example 1 &

12 g of kerosene was added to 56 g of straight asphalt and mixed. 651 g of 6-8 mm aggregate and 279 g of 0.3-0.5 mm aggregate were added to the mixture and mixed. The mixture was subjected to a physical property test as shown in Table 2.

≪ Comparative Example 2 &

6 g of linseed oil and 12 g of kerosene were added to 56 g of straight asphalt and mixed. 651 g of 6-8 mm aggregate and 279 g of 0.3-0.5 mm aggregate were added to the mixture and mixed. The mixture was subjected to a physical property test as shown in Table 2.

≪ Comparative Example 3 &

6 g of paraffin wax and 12 g of kerosene were added to 56 g of straight asphalt and mixed. 651 g of 6-8 mm aggregate and 279 g of 0.3-0.5 mm aggregate were added to the mixture and mixed. The mixture was subjected to a physical property test as shown in Table 2.

Raw material classification Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 asphalt 52 52 52 52 52 52 Kerosene 12 12 12 12 12 12 Linseed oil 6 Paraffin wax 6 Reactant I 6 Reactant II 6 Reactant III 6 6-8 mm aggregate 651 651 651 651 651 651 0.3-0.5 mm aggregate 279 279 279 279 279 279 Total 1000 Total 1000 Total 1000 Total 1000 Total 1000 Total 1000

Item
Example 1
Example 2
Example 3
Comparative Example 1
Comparative Example 2
Comparative Example 3 Early molding
Stability
(25 ° C, N)
2750
2810
2890
2500
2430
2350
Flow value (1/10 mm)
32
33
38
25
30
31
Porosity (%)
8
7
6
15
13
12 Ten days after molding
Stability
(25 ° C, N)
3369
4570
3840
2710
2560
2390

(Test Methods)

Stability: It was tested according to KS F 2337.

Flow rate: Tested according to KS F 2337.

Porosity: It was tested according to KS F 2364.

As shown in the above table, the examples showed better fluidity and strength than the comparative examples. As a result, it was confirmed that the asphalt pavement repairing composition containing the air-oxidizing ambient temperature binder manufactured according to the present invention is a more excellent material in terms of flowability and strength than the comparative example.

Claims (5)

70 to 80% by weight of asphalt,
20 to 60% by weight of a bisphenol-type epoxy resin having an equivalent weight of 500 or less and 20 to 60% by weight of a resin selected from myristoleic acid, palmitoleic acid, 5 to 10% by weight of an epoxy ester resin obtained by reacting 40 to 80% by weight of an unsaturated fatty acid having at least one aliphatic tail selected from at least one selected from docosahexanoic acid and linoleic acid,
And 15 to 20% by weight of a solvent.
A binder composition for asphalt pavement repairing according to claim 1 and an asphalt pavement repairing composition comprising aggregate. delete delete delete