JPH11286608A - Aqueous binder and its use - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aqueous binder which has good flowability and can form a cold-laid asphalt paving mixture not suffering from the separation of a binder and the settlement or segregation of an aggregate when it is mixed with the aggregate. SOLUTION: There are provided an aqueous binder comprising an aqueous asphalt emulsion (A), a water-soluble epoxy compound (B), a water-soluble amine compound (D), and a thixotropant (X), and a cold-laid asphalt paving mixture comprising the aqueous binder and an aggregate (E). It is desirable that the thixotropant X is at least one member selected from the group consisting of methylcellulose, carboxymethylcellulose, cement, silica sand, calcium carbonate, silicic anhydride, and a polymer emulsion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aqueous binder which can be used for various substrates at room temperature to bond the substrates or protect the surface of the substrates. Further, the present invention relates to an asphalt mixture for pavement at normal temperature using the aqueous binder.

[0002]

2. Description of the Related Art From the viewpoint of energy saving, development of asphalt mixture which can be applied at normal temperature has been eagerly developed in place of conventional asphalt mixture which is heated and paved. As such asphalt mixture for pavement at room temperature, there is already known an asphalt mixture obtained by adding an aggregate to an asphalt emulsion and using cement together with sand and crushed stone as the aggregate.

[0003]

However, since the above-mentioned asphalt mixture for paving at room temperature uses cement, it is necessary to pay attention to storage such as moisture and rainwater, and it is difficult to handle it on site. Furthermore, the performance of the finished pavement material is close to that of concrete pavement, and since cement is used, there is still room for improvement in terms of total energy and prevention of global warming.

[0004]

Means for Solving the Problems The present inventor has conducted intensive studies in view of the state of the art of the ordinary temperature asphalt mixture as described above. As a result, instead of the cement component of the ordinary temperature asphalt mixture, a water-soluble epoxy compound, By using a water-soluble melamine compound and a water-soluble amine compound, when used at room temperature, a novel aqueous binder capable of binding various substrates can be obtained. Further, by adding a thixotropic agent to this aqueous binder, Prevents the so-called sagging when using this material, and also prevents the separation of the aggregate from the aqueous binder, the sedimentation and unevenness of the aggregate when this water-based binder is used together with the aggregate to form asphalt mixture for pavement at room temperature. It was found that the original binder performance of the aqueous binder can be fully exhibited, and the present invention was completed. It was.

That is, according to the first aspect of the present invention, there is provided an aqueous binder comprising an aqueous asphalt emulsion (A), a water-soluble epoxy compound (B), a water-soluble amine compound (D), and a thixotropy-imparting agent (X). You. According to the second aspect of the present invention, the composition comprises an aqueous asphalt emulsion (A), a water-soluble epoxy compound (B), a water-soluble melamine compound (C), a water-soluble amine compound (D), and a thixotropic agent (X). An aqueous binder is provided. According to a third aspect of the present invention, the thixotropic agent (X) is at least one selected from the group consisting of methylcellulose, carboxymethylcellulose, cement, silica sand, calcium carbonate, silicic anhydride, and polymer emulsion. A first or second aqueous binder is provided. Further according to a fourth aspect of the present invention,
An asphalt mixture for paving at room temperature comprising the first to third aqueous binders and the aggregate (E) of the present invention is provided. In addition, "aqueous" of the aqueous binder means that the binder contains water. Hereinafter, the present invention will be described in detail.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As the aqueous asphalt emulsion (A) used in the present invention, known emulsions can be used. For example, asphalts such as straight asphalt, bron asphalt, modified asphalt type I and modified asphalt type II are used.
Emulsified liquid (hot water and surfactant) under high temperature of 10-200 ° C
In addition, those obtained by emulsification using an emulsifier such as a homogenizer or a colloid mill can be used.

[0007] Nonionic, anionic and cationic surfactants can be used. Anionic surfactants are those in which anions such as fatty acid salts, alkyl sulfate salts, alkyl benzene sulfonates, alkyl naphthalene sulfonates, and rosinates exhibit surface activity. The cationic surfactants are those in which cations exert surface activity, and examples thereof include those using alkylamine salts, quaternary ammonium salts, amidoamines, imidazolines, polyoxyethylene alkylamine salts, and the like. Further, amphoteric surfactants and nonionic surfactants, for example, ether type such as polyoxyethylene alkyl ether, polyoxyethylene alkyl allyl ether, polyoxyethylene polyoxypropylene ether, polyoxyethylene alkyl ester, sorbitan fatty acid ester And the like, an ester type such as polyoxyethylene alkylamine, an ether ester type such as polyoxyethylene sorbitan fatty acid ester, and a fatty acid alkylol amide type. Among these, it is preferable to use a nonionic surfactant.

Although the composition of a typical aqueous asphalt emulsion depends on the type of surfactant, an anionic surfactant such as an alkylbenzene sulfonate is used in an amount of 0.12.
-10.0% by weight, water 30-70% by weight and straight asphalt 30-70% by weight (the total of the three is 100%).
% By weight). The content of the surfactant is 0.2 to 10% by weight for the cationic type and 0.4 to 20% by weight for the nonionic type. The aqueous asphalt emulsion (A) may further contain additives such as a stabilizer, an anticoagulant, an emulsifier, and a dispersant. As such an aqueous asphalt emulsion, a commercially available one can be used.

The water-soluble epoxy compound (B) used in the present invention includes, for example, glycerol diglycidyl ether, glycerol triglycidyl ether, polyglycerol polyglycidyl ether, polypropylene glycol diglycidyl ether, ethylene glycol diglycidyl ether, propylene glycol diglycidyl ether. Glycidyl ether, polyethylene glycol diglycidyl ether, sorbitol polyglycidyl ether and the like, among which ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether,
Polyglycerol polyglycidyl ether is preferred,
Particularly, polyglycerol polyglycidyl ether is preferable. The water-soluble epoxy compound (B) has a concentration of 50 to
An aqueous solution or an undiluted product of 100% by weight, preferably 90 to 100% by weight can be used in the present invention.

The water-soluble melamine compound (C) used in the present invention is, for example, a melamine compound obtained by converting a formalin condensate of an amine compound such as methylolated melamine or butyrolized melamine into a neutralized salt with sulfuric acid, hydrochloric acid or the like to make it soluble. "Melflow" (manufactured by Mitsui Toatsu Co., Ltd.) and "Accelite" (manufactured by Nissan Chemical Co., Ltd.). As the water-soluble melamine compound (C), an aqueous solution having a concentration of 10 to 60% by weight, preferably 30 to 50% by weight in advance can be used in the present invention.

The water-soluble amine compound (D) used in the present invention reacts when an aqueous solution of a water-soluble epoxy compound (B) or a water-soluble melamine compound (C) is mixed, and ethylenediamine, diethylenetriamine, Examples include trimethylenediamine, triethylenetetramine, tetraethylenepentamine, metaxylylenediamine, isophoronediamine, and polyetheramine (for example, manufactured by Mitsui Texaco Chemical Co., Ltd.). As the water-soluble amine compound (D), an aqueous solution or an undiluted product having a concentration of 50 to 100% by weight, preferably 70 to 100% by weight can be used in the present invention. When the water-soluble amine compound (D) is blended with the water-based binder of the present invention, the water-soluble amine compound (C) and the water-soluble amine compound (D) are previously mixed and reacted. Is preferred.

As the thixotropy imparting agent used in the present invention, thixotropy imparting agents used in the fields of paints, adhesives, food additives, fillers and the like can be used as they are. For example,
Montmorillonite, bentonite, vermiculite,
Kaolin, colloidal silica, silicic anhydride (for example, trade name "Aerosil"), inorganic powder materials such as calcium carbonate, cement, silica sand, MC (methyl cellulose), HE
C (hydroxyethylcellulose), CMC (carboxymethylcellulose), polyvinyl alcohol (trade name “Poval”), polymer emulsion (SBR, NB
Organic powders such as latexes such as R and CR, acrylic polymers), fiber substances, and water-soluble substances can be mentioned. Each of these may be used alone, or two or more of them may be used in combination. Among these, Aerosil, MC, silica sand, and polymer emulsion are preferred from the viewpoint of the thixotropic effect.

The aqueous binder according to the present invention comprises the above-mentioned aqueous asphalt emulsion (A), a water-soluble epoxy compound (B) and a water-soluble amine compound (D), excluding a thixotropic agent. There is a compound comprising four members to which a water-soluble melamine compound (C) is added. In any case, if the mixing ratio does not include water and (A) is indicated only by the asphalt component, in the case of the above three, the aqueous asphalt emulsion is added to the total of 100% by weight of the three. The asphalt inside is preferably 25-
85% by weight, more preferably 55 to 70% by weight, the water-soluble epoxy compound (B) is preferably 5 to 70% by weight, more preferably 10 to 30% by weight, and the water-soluble amine compound (D) is preferably 0. Each range is 5 to 30% by weight, more preferably 1.5 to 10% by weight. In the case of the above four, the asphalt in the aqueous asphalt emulsion (A) is preferably 25 to 84% by weight, more preferably 55 to 65% by weight, based on 100% by weight of the total of the four.
The water-soluble epoxy compound (B) is preferably from 5 to 69.5.
% By weight, more preferably 10 to 20% by weight, the water-soluble melamine compound (C) is preferably 3 to 40% by weight, more preferably 3 to 10% by weight, and the water-soluble amine compound (D) is preferably 0.5% by weight. -10% by weight, more preferably 1.5%
-6% by weight. The added amount of the thixotropic agent is based on 100 parts by weight in total of the three or four.
0.001 to 100 parts by weight, preferably 0.01 to 50 parts by weight
It is in the range of parts by weight.

Next, the method for producing the aqueous binder of the present invention will be described. In the production method of the aqueous binder of the present invention, the water-soluble epoxy compound (B) is prepared without being mixed with other components in advance, and the other components (these components may be mixed) when the aqueous binder is prepared. There is no particular limitation except for mixing with water-soluble melamine compound (C) and water-soluble amine compound (D) when the aqueous binder has a composition of four containing water-soluble melamine compound (C).
It is preferable to mix and react with the remaining components at room temperature at the time of use at the time of use. For example,
A mixture of each aqueous solution of a water-soluble melamine compound (C) and a water-soluble amine compound (D) is added to the aqueous asphalt emulsion (A), and after mixing them, an aqueous solution of a water-soluble epoxy compound (B) is added. Further, there is a method of mixing. However, the present invention is not limited to these, and if necessary, water may be added separately from the water contained in each component. The thixotropy-imparting agent may be mixed in advance with one or more essential or optional components constituting the aqueous binder, or may be added and mixed after mixing the components excluding the thixotropy-imparting agent. Similarly, for example, when preparing an asphalt mixture for a normal temperature pavement described below, an asphalt mixture for a normal temperature pavement excluding a thixotropic agent is prepared, and a thixotropy imparting agent alone or another thixotropy imparting agent is added thereto. You may add and mix with additives (described later) other than the essential components.

In the aqueous binder of the present invention, other components such as a polymer compound, a coupling agent, another emulsion, and a latex may be added to the water-based binder at the time of the above-mentioned mixing or at other times within a range not to impair the effects of the present invention. It may be added.

The aqueous binder of the present invention can be used at normal temperature, and can be used for crushed stone, sand, cement, metal, wood, plastic,
It is useful for bonding various substrates such as concrete and surface protection treatment. As a specific application example, an asphalt mixture for pavement at room temperature will be described. The asphalt mixture for normal temperature pavement of the present invention comprises an aqueous binder and an aggregate (E).

The aggregate (E) used for the asphalt mixture for pavement at room temperature according to the present invention includes coarse aggregates such as crushed stones, fine aggregates such as sand and stone powder, and paved with asphalt components and other components. At this time, it is preferable to select and mix these aggregates so that the solid particles are closest packed. Normal,
The aggregate (E) contains, for example, 3% by weight or less of water, but may be used as it is. In the following, the weight of the aggregate (E) is based on the dry weight, and the water content is indicated separately.

In the case of the above three components, the mixing ratio of the above components constituting the asphalt mixture for paving at room temperature of the present invention is as follows: 100 parts by weight of the aggregate (E) in the aqueous asphalt emulsion (A) Asphalt component is preferably 0.1 to 1
2 parts by weight, more preferably 0.1 to 6 parts by weight, the epoxy compound component of the water-soluble epoxy compound (B) is preferably 0.1 to 12 parts by weight, more preferably 0.8 to 5 parts by weight, The diamine compound in the amine compound (D) is preferably 0.05 to 4 parts by weight, more preferably 0.08 parts by weight.
To 1 part by weight, preferably a thixotropic agent is 0.01 to 5 parts by weight.
0 parts by weight, and in the case of the above four components,
The asphalt component in the aqueous asphalt emulsion (A) is preferably 1 to 30 parts by weight, more preferably 3 to 7 parts by weight, and the epoxy compound component of the water-soluble epoxy compound (B) is 100 parts by weight of the aggregate (E). Is preferably 1 to 30 parts by weight, more preferably 1.5 to 4.5 parts by weight, and the melamine compound in the water-soluble melamine compound (C) is preferably 0.01 to 30 parts by weight, more preferably 0.1 to 30 parts by weight. ~ 4.5
Parts by weight, preferably 0.01 to 30 parts by weight, more preferably 0.1 to 4.5 parts by weight, of the diamine compound in the water-soluble amine compound (D), and preferably 0.01 to 50 parts by weight of the thixotropic agent. The components of the aqueous binder and the aggregate (E) are blended so as to be parts by weight.

Next, a method for producing an asphalt mixture for pavement at normal temperature will be described. Asphalt mix for room temperature pavement
It can be produced by mixing the aggregate at the same time as producing the aqueous binder of the present invention. In this case, the preparation of the aqueous binder as described above may be performed in the presence of the aggregate or before the mixing of the aggregate. For example, when the asphalt mixture for pavement at room temperature contains a water-soluble melamine compound (C), a water-soluble melamine compound (C) and a water-soluble amine compound (D) are mixed and reacted in advance. The mixture may be mixed at room temperature with the remaining components of the aqueous binder, and in particular, a mixture of each aqueous solution of the water-soluble melamine compound (C) and the water-soluble amine compound (D) is added to the aqueous asphalt emulsion (A) and mixed. After that, the aqueous solution of the water-soluble epoxy compound (B) and the thixotropy-imparting agent (X) are added and mixed, and this can be added and kneaded to the aggregate (E). When the water-soluble melamine compound (C) is not blended, the blending order is not particularly limited. For example, after mixing the water-soluble amine compound (D) with the aqueous asphalt emulsion (A), the water-soluble epoxy compound (B ), An aggregate (E), and a thixotropic agent (X) are added and mixed. In addition, you may add water separately from the water contained in each component as needed.

The asphalt mixture for pavement at room temperature of the present invention may contain, in addition to the above-mentioned components, a polymer compound which may be contained in an aqueous binder, a coupling agent, another emulsion and the like. These other components may be added as they are during the mixing or at another time.

The method of using the asphalt mixture for pavement at room temperature as a road pavement is not particularly limited, and the asphalt mixture is cast after preparing a base in the same manner as in the case of applying ordinary heated asphalt. Perform rolls, etc. The asphalt mixture for normal temperature pavement solidifies quickly enough to allow road traffic to be opened in about three hours from the point of mixing the components. In spite of the rapid solidification, the mixture has good fluidity and excellent workability until the components are mixed and poured in the pavement work process. In particular, the asphalt mixture for paving at room temperature of the present invention is excellent in fluidity because the thixotropic agent (X) is added, and when the flow before and after placement is stopped, Since the separation of the aggregate from other components can be effectively prevented, the aggregate is hardly settled or deviated, the uniformity of the aqueous binder is imparted, and the original binder performance can be sufficiently exhibited. Further, even after being cast and solidified, water is gradually scattered from the solidified material over a long period of several years, and the hardness increases accordingly. However, since the hardness of the solidified material is very high, the pavement road surface does not collapse due to the scattering of the water.

As another application of the water-based binder of the present invention, it is used as a paint for forming a surface protective coating film of various substrates without adding an aggregate. Further, by adding cement to the aqueous binder of the present invention in addition to cement which can be further added as a thixotropic agent, a useful mixture as a building material can be obtained.

[0023]

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples.

(Evaluation Items and Evaluation Methods) (1) Pot Life: Judgment was made by visual observation and tactile sensation, and was indicated by the time until the state changed significantly. (2) Workability: Judged by roller contactor, visual inspection, and marshall test specimen density. (3) Dynamic stability: The mixture was inserted into a volume of 30 cm × 30 cm × 5 cm, compacted at a compaction load of 900 kgf, compacted 25 times, compacted at a standard density of 100 ± 1%, and a temperature of 60 ± 2 ° C. For 5 hours or more (surface temperature 60 ± 0.5 ° C., normal temperature, transfer load 70 ± 1 kgf), and the dynamic stability was measured. (4) Kantaburo test: A test method for evaluating the asphalt mixture's resistance to scattering of aggregates, published by the Japan Road Association, “Drainage Pavement Technology Guideline (draft)” (issued November 5, 1996) Pp. 85-91.

(Examples 1 to 10) An aqueous asphalt emulsion serving as a component of an aqueous binder was prepared by the following method:
An additive solution AM, an additive solution DV, and an additive solution B were prepared. The aqueous asphalt emulsion is 620 g of straight asphalt,
30 g of nonionic surfactant (manufactured by Lion Corporation, polyoxyethylene alkyl ether) and 350 g of water
g using a Harel type homogenizer (SL type homogenizer manufactured by Kisho Co., Ltd.).
And emulsified at 55 ° C. The additive liquid AM is a water-soluble melamine compound (“Melflow” manufactured by Mitsui Toatsu Co., Ltd.) 8
4.6 g and 7.7 g of diethylenetriamine (DETA)
And 7.7 g of ethylenediamine (EDA) were sufficiently mixed and reacted. The addition liquid DV is a water-soluble melamine compound (“Melflow” manufactured by Mitsui Toatsu Co., Ltd.) 73.3.
26.7 g of polyamine ("Epicure" manufactured by Yuka Shell Epoxy Co., Ltd.) was stirred and mixed with the resulting mixture, and the mixture was stabilized. As a water-soluble epoxy compound, polyglycerol polyglycidyl ether was used as additive liquid B.

Next, the components constituting the above-mentioned aqueous binder (aqueous asphalt emulsion, additive liquid AM, additive liquid DV,
Aerosil, MC, and thixotropic agent are added to additive solution A).
C (cement), silica sand, and a polymer emulsion ("cs-1" manufactured by Chuo Rika Kogyo Co., Ltd.) were quickly mixed in the composition (unit: parts by weight) shown in Table 1 below and used as an aqueous binder.

[0027]

[Table 1]

(Examples 11 to 32) In order to evaluate the performance of the aqueous binder, the waste water (13) such as
50 kg of each of the aggregates having the same particle size and the others were blended at a ratio (unit: kg) shown in Table 2 below, and mixed by a pug mixer to obtain a room temperature mixture (mixed material). As for the order of charging to the mixer, the aggregate, the added water, and the aqueous binder were charged in this order and mixed. The mixing time was completed in a total of 90 seconds, and the mixture was discharged to obtain a mixture. This composite was evaluated according to the evaluation items shown in Table-2. Table 2 shows the results.

[0029]

[Table 2]

[0030]

[Table 3]

[0031]

[Table 4]

Comparative Example 1 5.5 parts by weight of straight asphalt was blended with 100 parts by weight of aggregate having a fine grain size of 13 and mixed at a temperature of 170 to 220 ° C. to prepare an asphalt mixture (Comparative Example 1). 4.2 parts by weight of straight asphalt was mixed with 100 parts by weight of the aggregate of Drainage No. 13 and mixed at a temperature of 170 to 220 ° C. to prepare an asphalt mixture (Comparative Example 2). Table 3 shows the evaluation results of each asphalt mixture.

[0033]

[Table 5]

As can be seen from the examples and comparative examples,
It was found that the asphalt mixture for paving at room temperature obtained using the aqueous binder of the present invention had better performance than the heated asphalt mixture shown in Comparative Examples. In addition, by changing the composition and amount of the aqueous binder, the type of aggregate and the amount of the aggregate, it is possible to obtain workability (workability) and performance (durability) according to the purpose, so a wide range of applications are possible. is there.

[0035]

The water-based binder provided by the present invention can be made into an asphalt mixture for pavement at room temperature by mixing an aggregate, and this can be applied at room temperature.
Compared with the conventional pavement using heated asphalt, it can greatly contribute to energy saving and has excellent fluidity, so that workability is extremely good. Further, since the road can be opened approximately three hours after paving, the present invention is also excellent in terms of reducing traffic interruption time. In addition, since the strength is high immediately after the pavement, although water is scattered with the passage of time, there is no collapse of the road surface and no occurrence of a rut on a conventional asphalt road surface when the temperature rises. Also, since the thixotropic agent is added to the aqueous binder of the present invention, the fluidity is good, and separation of the aggregate and the aqueous binder after pavement, sedimentation of the aggregate, prevention of unevenness, and the aqueous binder have The original binder performance can be sufficiently exhibited. Even when used as a paint, so-called dripping can be prevented.

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[Procedure amendment]

[Submission date] May 28, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

The water-soluble amine compound (D) used in the present invention reacts when an aqueous solution of a water-soluble epoxy compound (B) or a water-soluble melamine compound (C) is mixed, and ethylenediamine, diethylenetriamine, Trimethylenediamine, triethylenetetramine, tetraethylenepentamine, metaxylylenediamine, isophoronediamine, polyetheramine (for example, Henkeldi
Japan brand name "Bersamine", Mitsui Texaco Chemi
Cal Co., Ltd.) . The water-soluble amine compound (D) has a concentration of 50 to 100% by weight in advance,
An aqueous solution or an undiluted product, preferably 70 to 100% by weight, can be used in the present invention. When the water-soluble amine compound (D) is blended with the water-based binder of the present invention, the water-soluble amine compound (C) and the water-soluble amine compound (D) are previously mixed and reacted. Is preferred.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction contents]

As the thixotropy imparting agent used in the present invention, thixotropy imparting agents used in the fields of paints, adhesives, food additives, fillers and the like can be used as they are. For example,
Montmorillonite, bentonite, vermiculite,
Kaolin, colloidal silica, silicic anhydride (for example, trade name "Aerosil"), inorganic powder materials such as calcium carbonate, cement, silica sand, MC (methyl cellulose), HE
C (hydroxyethylcellulose), CMC (carboxymethylcellulose), polyvinyl alcohol (trade name “Poval”), polymer emulsion (SBR, NB
Latex such as R and CR, acrylic polymer , amidopo
Organic powders such as Rimmer ), fiber substances, or water-soluble substances. Each of these may be used alone, or two or more of them may be used in combination. Among these, Aerosil, MC, silica sand, and polymer emulsion are preferred from the viewpoint of the thixotropic effect.

Claims (4)

[Claims] 1. An aqueous binder comprising an aqueous asphalt emulsion (A), a water-soluble epoxy compound (B), a water-soluble amine compound (D), and a thixotropy-imparting agent (X). 2. An aqueous binder comprising an aqueous asphalt emulsion (A), a water-soluble epoxy compound (B), a water-soluble melamine compound (C), a water-soluble amine compound (D), and a thixotropic agent (X). 3. The thixotropic agent (X) is methyl cellulose, carboxymethyl cellulose, cement, silica sand,
3. The method according to claim 1, wherein the at least one selected from the group consisting of calcium carbonate, silicic anhydride, and a polymer emulsion.
The aqueous binder as described in the above. 4. An asphalt mixture for pavement at room temperature, comprising the aqueous binder according to claim 1 and an aggregate (E).