KR100629902B1 - Epoxy Resin Composition for Asphalt Pavement and Epoxy Asphalt Pavement Mixture Using the Same - Google Patents

Abstract

The present invention relates to an epoxy resin composition for asphalt with improved flow resistance, crack resistance, and the like, an epoxy asphalt composition using the same, more specifically, a diglycidyl ether having a molecular weight of 300 to 1,500 and two or more epoxide groups in a molecular structure. (Diglycidyl Ether) Bisphenol-A type epoxy resin, molecular weight 500-2,000, the phenolic novolac polyglycidyl ether epoxy resin having 2.2 or more epoxide groups in the molecular structure and the like, polyamine curing agent The present invention relates to an epoxy resin composition comprising an epoxy resin composition having improved physical properties.

Epoxy resin, asphalt, durable

Description

Epoxy Resin Composition for Asphalt Pavement and Epoxy Asphalt Mixture Using the Same

The present invention relates to an epoxy resin composition for asphalt with improved flow resistance, crack resistance, and the like, an epoxy asphalt composition using the same, more specifically, a diglycidyl ether having a molecular weight of 300 to 1,500 and two or more epoxide groups in a molecular structure. (Diglycidyl Ether) Bisphenol-A type epoxy resin, molecular weight 500-2,000, the phenolic novolac polyglycidyl ether epoxy resin having 2.2 or more epoxide groups in the molecular structure and the like, polyamine curing agent The present invention relates to an epoxy resin composition comprising a epoxy resin composition with remarkably improved physical properties such as Marshall stability and dynamic stability.

Traffic conditions for road pavement, such as increased traffic volume and larger vehicles, are deteriorating every year. The occurrence of plastic deformation is remarkable on such heavy traffic roads, and the repair cycle is getting shorter every year. As a result, repair work is increasing, road users suffer from time loss due to construction delays, residents around the road deteriorate the living environment due to noise and vibration, etc. Many problems have arisen such as this, and in such a situation, more durable packaging is calculated | required. Asphalt epoxy resin composition of the present invention is very high flow resistance performance is obtained with a heated asphalt mixture using asphalt and plastic epoxy resin.

On the other hand, the recent bridges tend to be long, and steel plates are increasing in place of concrete decks. However, in such steel sheet packaging, longitudinal cracking and plastic deformation occur, which is a serious problem. Among them, the steel sheet pavement packaged with the epoxy asphalt composition is known to exhibit durable road surface characteristics even in public for over 20 years.

Road pavement using an epoxy asphalt composition in which epoxy resin is added to asphalt has increased pavement life, and attempts to keep it as good as possible with increasing life span continue.

However, various epoxy asphalt compositions developed so far still have room for improvement in crack resistance and workability, and also have problems in which physical properties depend on conditions such as aggregate particle size to be mixed.

Accordingly, an object of the present invention is to solve the problems caused by the epoxy asphalt composition and pavement, and to provide an epoxy composition for asphalt and an epoxy asphalt composition using the same having improved Marshall stability and dynamic stability.

In order to achieve the above object, the present inventors have studied the epoxy resin composition for asphalt, and thus, invented the epoxy resin composition for asphalt with improved Marshall stability and dynamic stability.

As used herein, the term "epoxy resin composition" refers to a composition of a mixture of an epoxy main material and a curing agent, and "epoxy asphalt composition" refers to a composition of a mixture of an epoxy resin for asphalt of the present invention and general asphalt (aka straight asphalt). "Epoxy asphalt pavement mixture" refers to a mixture that can be paved on the road by mixing aggregate with the epoxy asphalt composition.

The main subject of the epoxy resin of the present invention is 300-1,500 molecular weight produced by epoxidation reaction with Bisphenol-A and Epichlorohydrine, and diglycidyl ether having two or more epoxide groups in the molecular structure ( Diglycidyl Ether) Bisphenol-A type epoxy resin (Formula 1), phenol novolac resin and epoxidation reaction of epichlorohydrin with a molecular weight of 500 ~ 2,000 produced by the epoxide group 2.2 At least one phenol novolac polyglycidyl ether epoxy resin (Formula 2), or a mixture of compounds represented by formulas 1 and 2 and mixtures of formulas 1, 2, 1 and 2 An epoxy resin to which at least one monoglycidyl ether or polyglycidyl ether epoxy resin represented by the formulas (3), (4) and (5) is added.

(Wherein n = 1 to 5)

(Wherein n = 1 to 5)

In addition, a known reinforcing agent such as rubber chloride may be added to the epoxy base material within the range of not significantly affecting the base material properties for the purpose of preventing cracking of the packaging material and increasing bending strength. In addition, well-known additives, such as a coloring agent (pigment) and a sedimentation inhibitor, can be added within the range which does not largely affect the physical property of a subject.

As a hardening | curing agent of an epoxy resin, the composition obtained by dehydrating condensation reaction of an amine, a polyamine, a phenol or an amine, a polyamine, and a phenol is used. Polyamines include those modified with aliphatic polyamines, aromatic polyamines, cycloaliphatic polyamines and polyamides having at least one primary amine group at the ends of these molecules, preferably aliphatic polyamines.

The main composition is prepared by adding a curing catalyst capable of accelerating curing at low temperature to one or more epoxy resins disclosed above, and preparing the curing agent composition to mix the main body and the curing agent in a ratio of 1 to 5: 1 by weight. Preferably, the epoxy resin composition for asphalt of the present invention can be obtained by mixing in a ratio of subject: hardener = 10: 7.

Moreover, as for the epoxy resin composition for asphalt of this invention, 10-50 weight% is preferable in 100 weight% of epoxy asphalt compositions. If the content is less than 10% by weight, the physical property improvement effect by the epoxy resin is hardly exhibited, and when it is more than 50% by weight, it is not economical.

In addition, in the present invention, the epoxy asphalt pavement mixture in which the aggregate is mixed with the epoxy asphalt resin composition may be 0.1 to 10% by weight of the epoxy asphalt resin composition based on 100% of the total weight of the mixture. When the epoxy asphalt resin composition is less than 0.1% by weight, there is little effect of improving the physical properties by the epoxy resin, and when it exceeds 10% by weight, it is not economical.

In addition, all or part of recycled aggregate may be used as the aggregate.

An example of the base surface pavement method of the epoxy asphalt pavement mixture of this invention is demonstrated. Asphalt plant prepared epoxy asphalt pavement mixture at 165 ± 10 ℃, transported to site by dump truck, installed in asphalt finisher, and the primary voltage (compact) was 8 at 130 ± 10 ℃. 3 times reciprocating with ~ 10ton tire roller, 2nd voltage reciprocating 3 times with 10 ~ 12ton tire roller at 90 ± 10 ℃, 3rd voltage reciprocating 3 times with 8 ~ 10ton tire roller at 70 ± 10 ℃ Pack it.

Epoxy asphalt pavement mixture was produced on asphalt pavement at high temperature of 160 ± 10 ℃ in asphalt plant and transported by dump truck and installed in asphalt finisher.The primary voltage was 10 ~ 12ton Macadamel roller at 130 ± 10 ℃. 3 round trips, secondary voltage is 3 round trips with 8-10ton tire roller at 90 ± 10 ℃ and 3rd round trips with 7-8ton tandem roller at 70 ± 10 ℃ to wrap surface layer.

The epoxy asphalt pavement mixture of the present invention can be used as a base pavement and can also be used as a surface pavement. Both the base and surface layers may be paved using the epoxy asphalt pavement mixture of the present invention. It is also possible to wrap the base layer with a pavement mixture other than the epoxy asphalt pavement mixture of the present invention, and to package the epoxy asphalt pavement mixture of the present invention on the surface layer and vice versa.

It is apparent to those skilled in the art that the packaging method exemplifies one of several methods and is not limited only to the description thereof.

Conventional epoxy asphalt composition has a problem that the workability is significantly lowered because the curing occurs too fast at high temperatures. However, the epoxy resin for asphalt according to the present invention can obtain a result of improving workability along with physical properties by slowing down the curing speed at a high temperature.

Physical properties of the epoxy resin main material and the curing agent are shown in Table 1, Table 2, and Table 3 below. In addition, Table 4, Table 5 shows the physical properties of the epoxy asphalt composition of the present invention. At this time, the epoxy resin in the epoxy asphalt composition is 35%, the main ingredient in the epoxy resin: curing agent = 10: 7.

division unit Product specification Remarks Exterior - Colorless transparent liquid Epoxy equivalent weight G / eq 170-550 Viscosity Cps @ 25 ℃ 12,400 Solid content Wt% 99.9 max

division unit Product specification Remarks Exterior - Viscous liquid Amine value MgKOH / G 200-350 Viscosity Cps @ 25 ℃ 39 max importance - 0.827

Item Measures standard Remarks Viscosity (25 ° C), cps subject 12400 2000-15000 JISK7233 Hardener 39 30-80  Specific gravity (25 ℃) subject 1.161 1.00-1.25 JISK7232 Hardener 0.827 0.75-1.0 Tensile Strength (25 ℃), Mpa 5.2 3.9 or higher JISK7113

Item Measures standard Remarks importance 1.024 1.00-1.03 JISK2207 Penetration Rate (/ 10mm) 24 20-30 JISK2207 Softening point (℃) 81 70-90 JISK2207 Viscosity (160 ° C), positive for 3 hours, cps 4500 10000 or less JISK7233 Tensile Strength (25 ℃), Mpa 2.6 2.0 or higher JISK7113

division unit Product specification Remarks Housework time Hr @ 25 ℃ 5hr min Mixing viscosity Cps @ 25 ℃ 1000-10,000 Gel time min @ 200 ℃ 15min

The following examples and comparative examples are intended to illustrate the present invention in more detail, and the scope of the present invention is not limited only to the description of the examples.

Example 1

Epoxy equivalent 190 (g / eq), viscosity 12,400cps (25 ℃), colorless transparent liquid, 100% by weight of diglycidyl ether bisphenol A epoxy resin, 7.6% by weight of phenol as a curing catalyst was added to the mixer at a speed of 1,000 rpm. The subject composition was prepared by mixing for 30 minutes with a stirrer and thoroughly mixing.

The curing agent prepared a liquid aliphatic polyamine having an amine number content of 250 MgKOH / g, a viscosity of 39 cps (25 ° C), and a specific gravity of 0.827.

The epoxy composition for asphalt of the present invention was prepared by rapidly mixing the main composition and the curing agent composition with a stirrer at a ratio of 10: 7 by weight.

Example 2

General asphalt and aggregate were mixed with the epoxy resin composition for asphalt of Example 1 to prepare an epoxy asphalt pavement mixture. An epoxy asphalt composition was prepared by mixing 25% by weight, 30% by weight, 35% by weight, and the remaining amount of asphalt, respectively, in the epoxy resin composition for asphalt prepared in Example 1.

Aggregates up to 13 mm {Table 6; Aggregate standard particle size (% of passage)} was 93.3% by weight, and 6.7% by weight of the epoxy asphalt composition was heated and mixed at 165 ° C. to prepare an epoxy asphalt pavement mixture of the present invention.

Checker (mm) % Of weight passed 19 100 13 95-100 5 75-90 2.5 65-80 0.6 40-65 0.3 20-45 0.15 15-30 0.074 8-15

Comparative Example 1

94.3% by weight of aggregates of 13 mm or less in aggregate and 5.7% by weight of an aggregate having a particle size as shown in Table 7 below, to prepare an asphalt pavement mixture called "# 78" to those skilled in the art.

Nominal Dimension (mm) 13 mm 25 mm - 20 100 13 95-100 5 55-70 2.5 35-50 0.6 18-30 0.3 10-21 0.15 6-16 0.08 4-8 Asphalt amount 4.5-7.0

Comparative Example 2

Modified asphalt concrete mixture was prepared by mixing 94.3% by weight of 13 mm or less aggregate having a particle size as shown in Table 7 with 5.7% by weight of asphalt containing 8% by weight of modifier (based on 100% by weight of asphalt).

Comparative Example 3

82mm by 13mm single grain aggregate. A drainage ascon pavement mixture was prepared by mixing 5% by weight asphalt, including 9% by weight sand, 5% filler and 12% by weight modifier (based on 100% asphalt 5).

[Changes According to Epoxy Resin Content]

Marshall stability, dynamic stability, and porosity of the epoxy asphalt pavement mixture (25 wt%, 30 wt%, 35 wt% of the epoxy concentration in the epoxy asphalt composition, respectively) prepared in Example 2 were respectively KSF2337: 2002, KSF2374: 2000, It measured by the method of KSF2349: 2004. The measurement results are shown in Table 8.

Item ＼ epoxy ratio 35 wt% 30 wt% 25% by weight standard Marshall stability (kg / ㎠) 6,500 6,100 4,700 More than 2000 Dynamic Stability (times / mm) 50,000 50,000 30,000 More than 5000 Porosity (%) 2.1 2.4 3.0 2-5%

[Comparison of Packaging Mixtures and Other Packaging Mixtures of the Present Invention]

Marshall stability, dynamic stability, and porosity of the packaging mixtures of Example 2 (the epoxy resin composition content of 35 wt%) and Comparative Examples 1 to 3 were measured by the methods specified in KSF2337: 2002, KSF2374: 2000, and KSF2349: 2004, respectively. It was. The results are shown in Table 9.

The present invention # 78 Modified Ascon Drainable Ascon Marshall stability (kg / ㎠) 6,500 1,000 1,500 500 Dynamic Stability (times / mm) 50,000 500 4,000 3,000 Porosity (%) 2.1 3 ~ 5 3 ~ 5 20

The epoxy resin composition of the present invention and the epoxy asphalt pavement mixture using the same have significantly improved physical properties such as Marshall stability and dynamic stability, thereby eliminating complicated urban traffic obstacles caused by frequent road repairs, and preventing traffic accidents caused by road defects. It can prevent and reduce national fiscal waste.

Claims (7)

A diglycidyl ether bisphenol-A type epoxy resin having a molecular weight of 300 to 1,500 represented by the formula (1), having two or more epoxide groups in a molecular structure, a molecular weight of 500 to 2,000, and a molecular structure of at least 2.2 epoxide groups Phenol Novolac Polyglycidyl Ether epoxy resin represented by the formula (2), or a mixture of the compound represented by the formula (1) and (2), the amine, polyamine, phenol or amine, polyamine and Epoxy resin composition for asphalt produced by mixing the composition obtained by the dehydration condensation reaction of phenol as a curing agent, the main body and the curing agent in a ratio of 1 to 5: 1 by weight. <Formula 1>

(Wherein n = 1 to 5) <Formula 2>

The epoxy resin composition for asphalt according to claim 1, wherein at least one monoglycidyl ether or polyglycidyl ether epoxy resin represented by Chemical Formulas 3, 4, and 5 is added to the subject composition. <Formula 3>

(Wherein n = 1 to 5) <Formula 4>

<Formula 5>

An epoxy asphalt resin composition according to claim 1 or 2, wherein the epoxy resin composition for asphalt is mixed in an asphalt ratio of 10 to 50:50 to 90 weight ratio. Epoxy asphalt pavement mixture, characterized in that 0.1 to 10% by weight of the epoxy asphalt resin composition of claim 3 based on 100% by weight of the total weight of the epoxy asphalt pavement mixture mixed with the aggregate in the epoxy asphalt resin composition. 5. The epoxy asphalt pavement mixture of claim 4, wherein the aggregate comprises some or all recycled aggregate. After placing the epoxy asphalt pavement mixture according to claim 4 or 5 prepared at 165 ± 10 ° C. with a finisher, the first compaction is performed 2 to 5 times with 8 to 10 ton rollers at 130 ± 10 ° C. and the second compaction. Silver is used 2 ~ 5 times with 10 ~ 12ton roller at 90 ± 10 ℃, and 3rd compaction is made by epoxy asphalt pavement mixture, which is reciprocated 2 ~ 5 times with 8 ~ 10ton roller at 70 ± 10 ℃. How to pack. Epoxy asphalt pavement mixture prepared at a high temperature of 160 ± 10 ℃ on the base pavement was installed with finisher, and the first compaction was made 2 ~ 5 times with 10 ~ 12ton roller at 130 ± 10 ℃ and the second compaction was 90 ± 10 ℃. Method of paving the surface layer using epoxy asphalt pavement mixture, characterized in that the 2 to 5 times with 8 to 10 ton roller, the third compaction reciprocated 2 to 5 times with 7 to 8 ton roller at 70 ± 10 ℃.