KR20010089918A - Method of making water-soluble-polymer-modified asphalt emulsion that can be solidified by heating and paving method of using the emulsion - Google Patents

Abstract

PURPOSE: Provided are a process for producing a thermosetting hydrophilic polymer modified asphalt emulsion for making asphalt concrete for an asphalt pavement at an ordinary temperature, cemphalt pavement and etc. and a paving method. CONSTITUTION: The thermosetting hydrophilic polymer-modified asphalt emulsion is produced by adding a hydrophilic functional polymer to an asphalt emulsion(cation, anion, nonion), wherein the hydrophilic polymer exhausts ammonia or amine and becomes water-insoluble by heating and the hydrophilic functional polymer becomes water-insoluble by heating. And the paving method comprises the steps of: making the asphalt concrete by using the asphalt emulsion; spreading the asphalt concrete on a road; making the asphalt concrete hard by using hardening equipment; and heat-curing the pavement.

Description

METHOOD OF MAKING WATER-SOLUBLE-POLYMER-MODIFIED ASPHALT EMULSION THAT CAN BE SOLIDIFIED BY HEATING AND PAVING METHOD OF USING THE EMULSION}

The pavement can be divided into heated asphalt pavement and room temperature asphalt pavement. Heated asphalt pavement is a widely used pavement method, but there is a pollution problem due to the discharge of carbon dioxide or toxic gas because it is carried out at a high temperature (150-180 ℃) when mixing asphalt and aggregate, heating costs and heating equipment You can not ignore the cost. There are also constraints to complete the compaction by transporting the heated asphalt to the packing site before it is cooled.

On the other hand, in the case of hydrophilic room temperature asphalt packaging, first, there is little risk of fire, second, there is almost no explosive solvent, third, there is no problem in bonding even if the aggregate surface is slightly wet, and fourth, environmentally friendly, cost There is also an inexpensive advantage. However, as a disadvantage, the curing rate is lowered due to the slower evaporation rate of water as compared to the heating asphalt package, and the physical strength is also relatively weak. It also contains a water-soluble surfactant, which may recombine with water when exposed to water and cause damage to packaging. Due to these problems, despite the many advantages, hydrophilic room temperature packaging is far lower in current use frequency than heating packaging.

In this room temperature asphalt pavement, there is a hydrophilic asphalt emulsion as an essential material to be added together with the aggregate, the pavement properties are determined according to the performance of this emulsion. The present invention includes a technique for producing a new concept of hydrophilic asphalt emulsion by improving the existing emulsion to improve the various disadvantages of the hydrophilic room temperature pavement pointed out above, and the packaging method using the emulsion.

Asphalt emulsions are made by dispersing asphalt in water, where a surfactant is used as a dispersant. Surfactants are divided into cations, anions, and nonions, respectively, depending on the charge of the ions. Thus, asphalt emulsions are also classified into cations, anions, and nonions. Among them, cationic asphalt emulsions are mainly used in domestic asphalt pavement, which is mainly composed of granite aggregate (60-80 is composed of anion component).

All types of aggregates used for asphalt pavement, although there are relative differences, are not composed of single ions, but consist of two components, cation and anion. For example, granite commonly used in domestic pavement has an anion component of 60-80 and a cationic component of 20-40, and is widely used as an air void or filler. Edo is composed of 30-50 anion components and 50-70 cations. Therefore, both the cation and anion components coexist in the aggregate and the filler that enter the asphalt pavement. In particular, recently developed cemphalt packaging contains a large amount of cement composed of cations in addition to granite, soil, or sand, which are mainly composed of anions, so that both cations and anions coexist.

Therefore, the monoionic emulsified asphalt, categorized as cationic, anionic, or nonionic, can accelerate the hardening of the emulsified state when the charge on the surface of the emulsified asphalt and the surface of the aggregate are different, thereby promoting hardening and improving the adhesion. In this case, the repulsion of the emulsion particles on the surface of the aggregate is hardly achieved, so that hardening is slow at the surface portion, and there is a problem in that the adhesive strength is also significantly decreased. For this reason, hydrophilic room-temperature asphalt pavement is more expensive than high-temperature asphalt pavement that coats the entire aggregate surface by heat, because a single emulsion of cation, anion, or non-ion cannot expect complete adhesion over the entire surface of the aggregate. It is not possible to achieve the desired physical strength.

In addition, in order to meet the rapidly increasing driving load of the medium-to-large vehicle, the role of the binder to aggregate the aggregate particles only by the asphalt strength contained in the asphalt emulsion, that is, insufficient to meet the physical strength of the pavement. In the case of high temperature asphalt pavement, polymer modified asphalt is used by mixing polymer (SBS, SBR, LDPE, PS, PU, PVC, etc.) together with asphalt. Even in the case of room temperature asphalt pavement sometimes added SBR latex, but still often does not meet the required pavement strength, but the situation is not added any polymer other than SBR latex.

An object of the present invention is to provide a method for producing a modified asphalt emulsion made by curing or reacting the polymer and asphalt by heating after adding a thermosetting or reactive polymer to the existing emulsion as one of the ways to increase the physical strength.

Another object of the present invention is to provide a method for paving a modified asphalt emulsion to pavement the road using the above-described emulsion.

According to this method, the cured asphalt and the polymer lose hydrophilic groups and become insoluble in water, and both the curing rate and the adhesion by the surface coating are promoted by heating, wherein the curing rate is increased by heat evaporation than when evaporating natural moisture. It's much faster. These pavement binders have excellent physical properties than asphalt only because asphalt and high strength polymer coexist together. Therefore, the resistance to plastic deformation, fatigue cracking and various cracks is also greatly improved.

The above object of the present invention is prepared by adding hydrophilic polymers that are decomposed when heated and release gas such as ammonia or amine and are insoluble in water to asphalt emulsion (cation, anion, nonionic), or when heated, reactive molecules It is achieved by the manufacturing method of the oil agent characterized by adding the hydrophilic functional polymer which becomes insoluble in water by making it become a network structure by crosslinking by reaction.

Another object of the present invention described above is the step of making ascon with an emulsion prepared according to claim 1 or 2, the step of laying the ascon on the road with a laying equipment, and the ascon laid on the road using compaction equipment. It is achieved by a packaging method using an emulsion comprising the step of compacting, heat curing the compacted packaging to increase the adhesive force, and at the same time to make it insoluble in water.

The present invention mixes 35-55 weight percent of water with 45-65 weight percent of asphalt having an infiltration degree of 80-100 (or 110-130) and adjusts the pH, and based on the amount of asphalt contained therein, 0.1-3 cationic or anionic surfactant. The weight percent and 0.1-3 weight percent of nonionic surfactant are added to disperse well to form the cationic or anionic aqueous asphalt emulsion first.

The cationic surfactant used at this time mainly refers to a nitrogen-based quaternary ammonium salt, which has good solubility in water in an acidic region and exhibits properties of a cation. Cationic emulsions have good adhesion with aggregates and accelerate the decomposition of emulsified particles, so that the opening of the traffic is achieved within a relatively short time. However, the cationic emulsion has a high preference, but tends to have poor emulsion stability compared to anionic surfactants.

For example, alkyl quaternary ammonium salts are as follows.

^{_{RN + (CH 3) 3 ·}} Cl -

^{_{R 2 N + (CH 3)}} 2 · Cl -

_{[RN (CH 3) 2 ·} CH 2 -C 6 H 6] + · Cl -

In addition, there are Alkyl dimethyl Benzyl ammonium chloride, Methyl triethanol-ammoniummethylsulfate dialkylester, Dimethyl Alkyl Amine, Class 2 higher alcohol ethoxy sulfate, Alginate ester salt, and the like.

There are also several types of imidazole salts (Imidazolinium Methosulfate, Tallow Imidazolinium methosulfate, Oleyl Imidazolinium Quaternary, Tallow Imidazolinium Quaternary) and Tallow alkyl propylene diamine, Polyoxyethylene tallow propylene diamine, Quaternary ammonium salt ethoxylated tallow alkyl cation. Surfactant. In addition, hydrochloric acid, acetic acid, and the like are used for PH control, and when the pH is 5-6, the adhesion strength with the aggregate is excellent. In addition, calcium chloride or magnesium chloride is usually added in an amount of about 0.1 relative to the oil agent to adjust the viscosity for improving storage stability.

A feature of nonionic surfactants for making asphalt emulsions is that they provide an emulsifier of HLB suitable for asphalt properties. However, since the adsorption power to aggregate and emulsification destruction ability after construction are poor, they are not used alone but in combination with cations or anions. Nonionic emulsifiers include polyoxyethylene alkylether derivatives, POE-Alkylaryl Ether, POE high fatty acid esters, polyoxyethylene nonylphenylether derivatives, polyoxyethylene alkylamine derivatives, and polyoxyethylene alkylamine derivatives Polyoxyethylene alkylester derivatives (Polyoxyethylene alkylester derivatives), Polyoxyethylene castor oil derivatives (Polyoxyethylene castor oil derivatives), sorbitan fatty acid ester derivatives (polyoxyethylene glycol derivatives) and the like.

Anionic surfactants for making anionic asphalt emulsions are inexpensive and easy to emulsify, but have poor adhesion to aggregates and a slow curing rate. Examples of anionic surfactants include sodium resinate, lignin sulfonate alkali metal salts, condensation salts of Naphthalene Sulfonic acid and Formaldehyde, Alkyl Naphthalene derivatives, Chlorobenzene derivatives, Alkylaryl Sulfonate, higher fatty acid alkali metal salts, alkylbenzenesulfate salts, and alpha-olefins Acid salts, polyoxyethylene alkylphenyl ethers, sodium alkylarylsulfonic acids, Alkyl Phosphate, Sodium (POE) Alkyl Aryl Ether Sulfate, Ammonium (POE) Alkyl Aryl Ether Sulfate, Sodium Dioctyl Sulfosuccinate, and the like.

Polyelectrolytes have an electric and strong anion or cationic property because anionic or cationic charges are present in the total number of monomers (at least thousands to millions) that make up the polymer compared to surfactants. Have Therefore, when the object meets the opposite charge shows a strong adhesion, in the present invention, the polymer electrolyte may be added by 0.1-3 by weight to improve the adhesion by utilizing this property.

Like the surfactant, the polymer electrolyte may be classified into an anion, a cation, and a nonionic electrolyte. Anionic polymer electrolytes include poly-sodium-acrylate, poly-styrene-sodium-sulfonate, maleic acid-vinyl methyl ether copolymer, and sodium arginate ( alginic acid sodium salt), carboxy-methyl-cellulose (CMC), and maleic acid-vinyl acetate copolymer. Cationic polymer electrolytes include aniline resins, poly-thio-urea, poly-vinyl-benzyl-tri-methyl-ammonium-chloride, poly-ethylene-imine, chitogen, polyhexa-methlene-polyimine, and polyvinyl- pyridine-butyl-bromide, polyacryl-hydrazine-ammonium-chloride, and the like. Nonionic polymer electrolytes include polyoxy-ethylene, polyacryl-amide, polyvinyl-alcohol, urea resine, water-soluble starch, gelatin, and the like.

The room temperature pavement using conventional asphalt emulsions, whether cations or anions, has been used in a limited way despite the advantages of environmentally friendly pavements due to the aforementioned disadvantages. In order to solve this problem, the polymer modified asphalt emulsion was developed by improving the existing emulsion for the purpose of widening the scope of application. The method for preparing a polymer modified emulsion claimed in the present invention can be classified into two types.

First, the new technology claimed in the present invention is to add a hydrophilic polymer of about 3-20 weight of the asphalt content to the cationic or anionic emulsion prepared above to make a polymer modified asphalt emulsion. These emulsions are used for asphalt pavement, simpfalt pavement, reclaimed asphalt pavement, and other asphalt constructions for construction purposes, and can be used for road pavement, simple pavement, sidewalk pavement, building materials, etc. 80-97 weights and 3-20 weights of modified emulsion, soil-cement mixtures (soil: cement = 2-8: 1) at room temperature Simphalt packaging, 80-97 weights and 3-20 weights of modifier, recycled asphalt asphalt 20 -80 weight and soil-cement mixture (soil: cement = 2-8: 1) 20-80 weight and 3-20 weight of modifying emulsion are put in a mixer at room temperature and mixed well to prepare the corresponding packaging ascones. After laying the asphalt on the road and compacting it, the road is heated to 80 -180 ℃ using a road heater, and the excess water remaining on the pavement is evaporated to promote hardening and release ammonia or amine from the hydrophilic polymer. It is a technology that converts into a polymer insoluble in water, and a packaging having excellent mechanical strength.

Most of the hydrophilic polymers used at this time are made water-soluble by introducing a hydrophilic group into the molecule. The structure contains excessively a carboxyl group and a hydroxyl group, and when this free carboxyl group is neutralized by ammonia or an organic amine, it becomes a water-soluble salt. However, it has been applied to the present invention that heating this salt decomposes to release ammonia or amine and turn it back into a polymer insoluble in water. The water-soluble polymer is water, but in addition to water, it may contain 0.1-20 weight of water-soluble solvents such as alcohol, ethylene glycol and esters for the purpose of promoting the solubility of the polymer and lowering the surface tension with water. .

The addition of hydrophilic polymers to cationic or anionic emulsions can sometimes lead to charge instability and disrupt the emulsification of asphalt. When this problem occurs, a hydrophilic polymer should be added after blending 0.1-2 weight percent of amphoteric surface active agents on the basis of asphalt content. In this way, the stability of the emulsion particles dispersed in water can be maintained even if the polymer is added.

The cationic surfactants claimed here can be broadly classified into four types, which are listed below. First, the betaine type (-CH (N + (CH3) 3) COO-) is myristyl betaine, N-Octadecyl Oxymethyl-N, N-Dimethyl Betain, N-Octadecyl Oxymethyl-N, N-Diethyl Betain, etc. . The second is glycine type (-NH-CH2-COOH) which is mainly used for disinfectant disinfectant, C ₁₂ H _25- (NH-CH ₂ -CH ₂ ) ₂ -NH-CH ₂ -COOH HCl, (C ₈ H ₁₇ -NH-CH ₂ -CH ₂ ) ₂ N-CH ₂ -COOH HCl and the like. Third, alanine type (-NH-CH ₂ -CH ₂ -COOH) is C ₁₂ H ₂₅ -NH-CH ₂ -CH ₂ -COOH HCl. Fourth is Sulfobetain type (-NH-SO ₃ H), C ₁₇ H ₃₅ -NH (HCl) -CH ₂ -CH ₂ -SO ₃ Na, C ₁₇ H ₃₅ -NH (HCl) -CH ₂ -C ₆ H ₄ -SO ₃ Na and the like.

Examples of the hydrophilic polymer mentioned in the present invention are as follows.

1. Water soluble alkyd resin

As a polycondensation product of a phthalic anhydride-pentaerythritol system or trimellitic anhydride-glycol adipic acid type | system | group, what neutralized the thing of about 50-70 acid value with ammonia or an amine is typical. It is mainly used in combination with water-soluble amine resin (water-soluble urea and melamine resin) or phenol resin. At this time, the alkyd melamine-based resin is cured at 120-150 ° C. and the alkydphenol-based resin at 150-170 ° C.

2. Water soluble melamine resin

Oxylic acid was added to tri-metholol melamine and methanol, followed by heating. The mixture was cooled and concentrated to remove methanol, and then adjusted to PH 7-8 with amine.

3. Water Soluble Urea Resin

Bisulfate and urea or thiourea are reacted with aldehydes and alkylated to raise the pH with amines to be water soluble.

4. Water Soluble Phenolic Resin

It is resin which made water-soluble by reacting phenol and formalin under an alkali catalyst. In order to improve compatibility with alkyd resins, condensates of alkylphenols are sometimes used.

5. Water soluble acrylic resin

Acrylic ester, styrene, acrylic acid, maleic acid, methacrylic acid, etc. are copolymerized suitably, and the acidic acid group was solubilized with the salt of ammonia or an amine. An acryl-type hardens | cures in combination with an amino resin, or by the magnetic reaction of the carboxyl group and an epoxy group in an acryl resin. The deposition temperature is often about 150 ° C.

6. Water soluble epoxy resin

Neutralizing copolymerized resins such as styrene-maleic acid, acrylic acid ester-acrylic acid and acrylic acid ester-acrylamide with amine and adding a water-soluble epoxy resin to them, the adhesion temperature is high at 150-180 ° C, It can lower to about 120 degreeC by adjustment of PH etc.

7. Water Soluble Polybutadiene Resin

Polybutadiene having a high iodine value and a large number of double bonds is reacted with unsaturated dibasic acids such as maleic anhydride and fumaric acid to introduce an acid group and neutralize it with an amine.

Examples of the polymer-modified asphalt composition claimed in the present invention are as follows.

Composition 1

Anionic Asphalt Emulsion ----- 85 Weight

(39.26 weight of water, 60 weight of asphalt cement, 0.3 weight of alkylbenzenesulfate, 0.2 weight of polyoxyethylene alkyl ether, 0.2 weight of ethyl alcohol, 0.04 weight of sodium hydroxide)

Water soluble alkyd resin ------ 9.9 weight

Water Soluble Urea Resin ------ 5wt

Sodium Polystyrenesulfonic Acid ----- 0.1 Weight

Composition 2

Cationic Asphalt Emulsion ------- 92 Weight

(39.26 weight of water, 60 weight of asphalt cement, 0.3 weight of Polyoxyethylene tallow propylene diamine, 0.2 weight of polyoxyethylene alkyl ether, 0.2 weight of ethyl alcohol, 0.2 weight of CaCl2 2H2O, 0.16 weight of 35HCl (PH 3-4))

Myristyl Betaine -------- 0.2 Weight

Water Soluble Polybutadiene Resin

Second, another novel technique claimed in the present invention is to prepare a functional polymer modified asphalt emulsion by adding 3-20 weight of the total asphalt content and a small amount of reaction initiator to the aforementioned cationic or anionic emulsion. This emulsion is used for asphalt pavement, shimpalt pavement, reclaimed asphalt pavement, and other asphalt construction for construction purposes. It is used for road pavement, simple pavement, sidewalk pavement and building materials. At room temperature asphalt pavement, 80-97 weight of aggregate and 3-20 weight of modifier are used, and at room temperature simphalt, 80-97 weight and 3-20 weight of modifier are used. In the present invention, 20-80 weight of crushed waste ascon and 20-80 weight of soil-cement mixture (soil: cement = 2-8: 1) and 3-20 weight of modifying emulsion are mixed well at room temperature to prepare corresponding packaging ascones. The asphalt concrete is laid on the road, compacted, and the road is heated to 80 -180 ℃ using a paving heater. At this time, the excess moisture remaining in the package is evaporated to promote hardening, and the functional polymer and the reaction initiator in the package react to form a network structure between adjacent polymers. Due to this network structure, the hydrophilic polymer is insoluble in water and at the same time, the mechanical strength is greatly enhanced.

Most of the functional polymers used in this method should contain carboxyl group (-COOH), hydroxyl group (-OH), amine group (-NH ₂ ), or unsaturated chain (-CH = CH-) in the molecule. These functional groups present in the molecule react during heating to form networks between the molecules. The water-soluble polymer is water, but in addition to water, the water-soluble solvent of alcohol, ethylene glycol, or ester-based water may be contained in an amount of about 1 to 20 wt% in order to promote the solubility of the polymer and to lower the surface tension with water. .

When hydrophilic functional polymers are added to a cationic or anionic emulsion, sometimes the charge may be unstable and the emulsified state of the asphalt may be destroyed. When this problem occurs, a hydrophilic polymer should be added after blending 0.1-2 weight percent of amphoteric surface active agents on the basis of asphalt content. This can maintain the stability of the emulsion particles dispersed in water despite the addition of the polymer.

end. Free radical reaction and condensation reaction

Unsaturated polymers and amide-based polymers (polyacrylamide, polythiourea resine, melamine resine, polyaniline, etc.) are added at a ratio of 1 to 3 by weight to the cation or anionic asphalt emulsion, and maleic anhydride asphalt, ethylene anhydride, succinic anhydride, phthalic anhydride, trimellitic anhydride, pyromellitic dianhydride, etc. or double acid (maleic acid, fumaric acid, succinic acid, adipic acid, oxalic acid, citric acid, sebacic acid, terephthalic acid, etc.) 1-5% by weight and reaction initiators (hydrogen peroxide, benzoyl peroxide, azobisisobutyronitrile (AIBN), methyl-ethyl-keton-peroxide (MEKP), t-butyl-peroxy-benzoate, di-cumyl peroxide, di-iso-propyl- peroxy-di-carbonate, etc.) by adding and mixing a small amount of the polymer modified asphalt emulsion. Herein, unsaturated polymers include unsaturated polyester, water-soluble polybutadiene, SBR latex, styrene-butadiene-styrene rubber latex, waste rubber rubber, and various rubber powders. water-soluble polymers or insoluble polymer chips having all unsaturated chains such as powders). When the unsaturated polymer in such an emulsion is heated, an unsaturated chain is opened by the reaction initiator to generate free radicals in the portion, and the radical is combined with anhydrous acid or a double acid to change into a polymer having a carboxylic acid group. The carboxylic acid polymer undergoes a polycondensation reaction with an adjacent amide polymer during heating to form a network polymer insoluble in water.

The following is an example of a composition for this technique.

Composition 3

Anionic Asphalt Emulsion ----- 85 Weight

(39.26 weight of water, 60 weight of asphalt cement, 0.3 weight of alkylbenzenesulfate, 0.2 weight of polyoxyethylene alkyl ether, 0.2 weight of ethyl alcohol, 0.04 weight of sodium hydroxide)

Polyacrylamide ---- 0.5 Weight

Unsaturated Polyester ----- 7.0 Weight

SBR Latex ----- 5.0 Weight

Maleic anhydride ----- 2.5 weight

MEK Peroxide ----- Small Amount

Composition 4

Cationic Asphalt Emulsion ------- 92 Weight

(39.26 weight of water, 60 weight of asphalt cement, 0.3 weight of Polyoxyethylene tallow propylene diamine, 0.2 weight of polyoxyethylene alkyl ether, 0.2 weight of ethyl alcohol, 0.2 weight of CaCl2 2H2O, 0.16 weight of 35HCl (PH 3-4))

SBR Latex ----- 7.5 Weight

Adipic acid ----- 2.5 weight

Benzoyl Peroxide ----- Small amount

I. Polycondensation reaction

a. Carboxylic Acid-Based Polymers and Amide-Based Polymers (or Diamine Compounds)

Carboxylic acid-based polymers that can be added to the water-soluble asphalt emulsion include sodium polyacrylate, polyalginic acid sodium salt, and maleic acid-vinyl acetate copolymer. These water-soluble polymers and amide-based polymers (polyacrylamide, poly (thio) urea resine, melamine resine, polyaniline, etc.) or diamine compounds (hexamethylenediamine, ethylene diamine, aniline, etc.) in a ratio of 1: 1 (or 1: 2.8) 3 to 20 weight percent of the asphalt content is added and mixed with the cationic or anionic asphalt emulsion to prepare a polymer modified asphalt emulsion. The carboxylic acid group (-COOH) and the amine group (-NH ₂ ) in such an emulsion generate | occur | produce a polycondensation reaction by heating, and the polymer of a network structure insoluble in water is produced.

b. Carboxylic Acid Polymer and Alcohol Polymer (or Dialcohol Compound)

Asphalt ratio of the above-mentioned carboxylic acid-based polymer and water-soluble alcohol-based polymer (polvinylalcohol, polyphenol, sodium cellulose methyl carboxylate, etc.) or dialcohol compounds (ethylene glycol, butylglycol, decylglycol, dodecylglycol, etc.) in a ratio of 1: 1 The polymer modified asphalt emulsion is prepared by adding and mixing 3-20 wt.% To the cation or anionic asphalt emulsion. The carboxylic acid group (-COOH) and alcohol group (-OH) in such an emulsion generate | occur | produce a polycondensation reaction by heating, and the polymer of a network structure insoluble in water is produced.

c. Amide-based polymers (or alcohol-based polymers) and dicarboxyl compounds

Amide-based polymers (or alcohol-based polymers) and dicarboxylic compounds (oxalic acid, adipic acid, sebacic acid, terephthalic acid, etc.) mentioned above are cationic at about 3-20% by weight of asphalt. Or by adding and mixing the anionic asphalt emulsion to prepare a polymer modified asphalt emulsion. The amide group (-NH2) or alcohol group (-OH) in such an emulsion produces a polycondensation reaction by heating with a carboxylic acid group (-COOH), and the polymer of a network structure insoluble in water is made. In the polycondensation reaction, metal oxides, acetates, and sulfuric acid are used as catalysts to accelerate the reaction.

Composition 5

Anionic Asphalt Emulsion ----- 90 Weight

(39.26 weight of water, 60 weight of asphalt cement, 0.3 weight of alkylbenzenesulfate, 0.2 weight of polyoxyethylene alkyl ether, 0.2 weight of ethyl alcohol, 0.04 weight of sodium hydroxide)

Sodium Polyacrylate ----- 2.5 Weight

Unsaturated Polyester ----- 5.0 Weight

Maleic acid ----- 0.5 weight

MEKP ----- Small quantity

Polyacrylamide ----- 0.2 Weight

Hexamethylenediamine ----- 1.8 weight

Iron hydroxide ----- small amount

Composition 6

Cationic Asphalt Emulsion ------- 89.5 Weight

(39.26 weight of water, 60 weight of asphalt cement, 0.3 weight of Polyoxyethylene tallow propylene diamine, 0.2 weight of polyoxyethylene alkyl ether, 0.2 weight of ethyl alcohol, 0.2 weight of CaCl2 2H2O, 35 weight of HCl, 0.16 weight (PH 3-4))

Sodium Polyacrylate ----- 3.0 Weight

Unsaturated Polyester ----- 5.0 Weight

Maleic acid ----- 0.5 weight

Dicumyl peroxide ----- Small amount

decylglycol ----- 1.5 weight

sodium cellulose methyl carboxylate --- 0.5 weight

Composition 7

Anionic Asphalt Emulsion ----- 90.5 Weight

(39.26 weight of water, 60 weight of asphalt cement, 0.3 weight of alkylbenzenesulfate, 0.2 weight of polyoxyethylene alkyl ether, 0.2 weight of ethyl alcohol, 0.04 weight of sodium hydroxide)

Polyacrylamide ----- 1.0 Weight

Polyphenol Resin ----- 1.0 Weight

Unsaturated Polyester ----- 5.0 Weight

Maleic acid ----- 1.5 weight

Dicumyl peroxide ----- Small amount

adipic acid ----- 1.0 weight

Iron hydroxide ----- small amount

The thermosetting polymer emulsions prepared above are used for the manufacture of asphalt concrete for room temperature asphalt pavement, simpalt pavement, reclaimed asphalt pavement, and other construction purposes, and are used in various road pavements, simple pavements, sidewalk pavements, and building materials. An example thereof is as follows.

Example 1

At room temperature asphalt pavement, 94 weight of aggregate (see Table 1 for particle size distribution) and 6 weight of modifier (composition 3) are added to the mixer and mixed well for 3 minutes at room temperature to prepare paving ascon. Marshall specimens were prepared by filling 1250 grams of this asphalt concrete with a double-sided compaction of the top and bottom surfaces, 75 times per side.

Table 1. Particle Size Distribution

Density Degree Asphalt Concrete Percent Weight ()

26.5 mm 100 19.0 " 95-100 " 13.2 " 75-90 " 4.75 " 45-65 " 2.36 " 35-50 " 600 micron 18-30 " 300 " 10-21 " 150 " 6-16 " 75 " 4-8 "

The specimen was placed in a mold in a drying furnace at 150 ° C., heated for 30 minutes, taken out, cooled, and demolded. After demolding for 24 hours, the specimen was immersed in a hot water at 60 ° C. for 30 minutes, and then taken out immediately. As a result, the Marshall stability value was 1450, which satisfies the Marshall stability value of the surface layer 800 as well as the substrate (requirement value 400). These results suggest that room temperature pavement using thermosetting polymer-modified asphalt emulsion has no problem in using as a base material or surface material unlike conventional room temperature pavement.

Example 2

In the room temperature SimPalt packaging, 95 weights of soil-cement mixtures (soil: cement = 5: 1) and 5 weights of modifying emulsion (composition 1) are added to a mixer and mixed well at room temperature for 3 minutes to prepare packaging ascon. Marshall specimens were prepared by filling 1250 grams of this asphalt concrete with a double-sided compaction of the top and bottom surfaces, 75 times per side. The specimen was placed in a mold in a drying furnace at 150 ° C., heated for 30 minutes, taken out, cooled, and demolded. After demolding for 24 hours, the specimen was immersed in a hot water at 60 ° C. for 30 minutes, and then taken out immediately.

As a result, the Marshall stability value was 1250, which satisfies the Marshall stability value of the surface layer 800 as well as the substrate (requirement value 400). These results suggest that the room temperature pavement using the thermosetting polymer modified asphalt emulsion can be used sufficiently as a base material or surface material unlike the conventional room temperature pavement.

Example 3

In the reclaimed asphalt pavement, 50 weights of crushed waste ascon and 45 weights of soil-cement mixture (soil: cement = 2-8: 1) and 5 weights of modifying emulsion (composition 5) are added to the mixer and mixed well for 3 minutes at room temperature. Manufacture. 1250 grams of this asphalt concrete was filled into a Marshall mold, and the top and bottom sides were compacted 75 times on one side to make Marshall specimens. The specimen was placed in a mold in a drying furnace at 150 ° C., heated for 30 minutes, taken out, cooled, and demolded. After demolding for 24 hours, the specimen was immersed in a hot water at 60 ° C. for 30 minutes, and then taken out immediately. As a result, the Marshall stability value became 1550, which satisfies the Marshall stability value of the surface layer 800 as well as the substrate (requirement value 400). These results indicate that the room temperature pavement using the thermosetting polymer-modified asphalt emulsion can be used as a base material or surface material, unlike the conventional room temperature pavement.

According to the present invention described above, a new concept of producing ascon with an asphalt emulsion containing a polymer that is cured by heating, laying and compacting on a road, and then heating and curing the compacted road, according to the present invention. Introduced for the first time. The effect of this invention is that the environmentally friendly normal temperature packaging technique is made comparable or superior to the heating high temperature packaging method to make it a competitive technique. Specifically, heat hardening makes the material insoluble in water, induces rapid hardening with evaporation of water, and improves the adhesive strength by heating, and also improves the packaging strength.

According to this method, as in the high temperature packaging method, there is no need for the heat mixing equipment necessary for manufacturing the ascon or the constraint that the packaging must be completed before the molten ascon is cooled. Because of these various advantages, it is expected that the technology presented in the present invention will be widely used for future road paving.

Claims (3)

A method for producing an emulsion, characterized in that the asphalt emulsion (cationic, anion, nonionic) is produced by adding hydrophilic polymers that decompose when heated to release gas such as ammonia or amine and become insoluble in water. An emulsion manufacturing method for producing asphalt emulsions (cationic, anion, nonionic) by adding a hydrophilic functional polymer which, when heated, reacts with a reaction initiator and becomes insoluble in water. Making ascon with an emulsion prepared according to claim 1, Laying the ascon on the road by means of installation equipment; Compacting the asphalt concrete installed on the road using compaction equipment, A method of packaging using an emulsion comprising the step of making the compacted packaging heat-hardened to increase adhesion, thereby making it insoluble in water.