JP3892966B2 - Water-based binder and its use - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an aqueous binder that can be used for various substrates at room temperature to bond the substrates or protect the substrate surface. Furthermore, it is related with the asphalt compound material for normal temperature pavements which uses the said water-system binder.
[0002]
[Prior art]
From the viewpoint of energy saving, the development of asphalt composites that can be constructed at room temperature is desired eagerly instead of conventional asphalt composites that are heated and paved. As such asphalt pavement asphalt mixture, an aggregate is added to an asphalt emulsion, and a cement using sand and crushed stone is already known as the aggregate.
[0003]
[Problems to be solved by the invention]
However, since the above-mentioned room temperature pavement asphalt mixture uses cement, it is necessary to pay attention to storage of moisture, rainwater, etc., and it is difficult to handle on site. Furthermore, the performance of the finished pavement material is similar to that of concrete pavement, and there is room for improvement from the viewpoint of total energy and prevention of global warming due to the use of cement.
[0004]
[Means for Solving the Problems]
As a result of diligent study in view of the present state of the technology of room temperature asphalt mixture as described above, the present inventor replaced the cement component of the room temperature asphalt mixture with a water-soluble epoxy compound, 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, and by adding a thixotropic agent to this, so-called sagging when using this aqueous binder can be obtained. This water-based binder can be used in combination with aggregates to form asphalt composites for room temperature pavements, which can prevent separation of aggregates and water-based binders, settling of aggregates, and bias. It has been found that the performance can be sufficiently exhibited, and the present invention has been completed.
[0005]
That is, according to the first aspect of the present invention, a group consisting of an aqueous asphalt emulsion (A), a water-soluble epoxy compound (B), a water-soluble amine compound (D), and methylcellulose, carboxymethylcellulose, cinnabar sand, silicic acid anhydride and a polymer emulsion. The thixotropic agent (X) is at least one selected from the above, and the content of the thixotropic agent (X) is 100 parts by weight of the total amount of (A), (B) and (D). for aqueous binders cold paving asphalt mixture, which is a 0.001 part by weight is provided for.
According to the second aspect of the present invention, the aqueous asphalt emulsion (A), the water-soluble epoxy compound (B), the water-soluble melamine compound (C), the water-soluble amine compound (D), and methylcellulose, carboxymethylcellulose, cinnabar, anhydrous It consists of a thixotropic agent (X) that is at least one selected from the group consisting of silicic acid and a polymer emulsion, and the content of the thixotropic agent (X) is (A), (B), (C ) and (cold paving asphalt mixture for aqueous binder, which is a 0.001 parts by weight per 100 parts by weight of the total amount of D) is provided.
According to a third aspect of the present invention, the surface protective coatings, characterized by containing a has been cold paving asphalt mixture for aqueous binders according to claim 1 or 2 is provided.
Further according to the fourth invention, cold paving asphalt mixture, characterized in that it consists of an aqueous binder and aggregate for cold paving asphalt mixture according to claim 1 or 2 (E) are provided The
The “aqueous” of the aqueous binder means that the binder contains water.
Hereinafter, each of the present invention will be described in detail.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
As the aqueous asphalt emulsion (A) used in the present invention, known ones can be used. For example, straight asphalt, bronze asphalt, modified asphalt type I, modified asphalt type II and the like are emulsified at a high temperature of 110 to 200 ° C. What was obtained by emulsifying with liquids (warm water and surfactant) using emulsifiers, such as a homogenizer and a colloid mill, can be used.
[0007]
As the surfactant, nonionic, anionic and cationic systems can be used. Anionic surfactants are those in which anions such as fatty acid salts, alkyl sulfate salts, alkylbenzene sulfonates, alkyl naphthalene sulfonates, and rosinates exhibit surface activity. In addition, the cationic surfactant is one in which a cation exhibits a surface activity, for example, an alkylamine salt, a quaternary ammonium salt, an amidoamine, an imidazoline, a polyoxyethylene alkylamine salt or the like. Furthermore, amphoteric surfactants and nonionic surfactants such as polyoxyethylene alkyl ethers, polyoxyethylene alkyl allyl ethers, polyoxyethylene polyoxypropylene ethers and the like, polyoxyethylene alkyl esters, sorbitan fatty acid esters 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 can be used. Among these, it is preferable to use a nonionic surfactant.
[0008]
The composition of a typical aqueous asphalt emulsion depends on the type of surfactant, but an anionic surfactant such as an alkylbenzene sulfonate is 0.12 to 10.0% by weight, water is 30 to 70% by weight, and The straight asphalt is 30 to 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 system and 0.4 to 20% by weight for the nonionic system. In addition, the aqueous asphalt emulsion (A) may further contain additives such as a stabilizer, an anticoagulant, an emulsification aid, and a dispersant. As such an aqueous asphalt emulsion, a commercially available one can be used.
[0009]
Examples of the water-soluble epoxy compound (B) used in the present invention include glycerol diglycidyl ether, glycerol triglycidyl ether, polyglycerol polyglycidyl ether, polypropylene glycol diglycidyl ether, ethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, Examples thereof include polyethylene glycol diglycidyl ether and sorbitol polyglycidyl ether. Among them, ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether and polyglycerol polyglycidyl ether are preferable, and polyglycerol polyglycidyl ether is particularly preferable.
As the water-soluble epoxy compound (B), an aqueous solution or an undiluted product having a concentration of 50 to 100% by weight, preferably 90 to 100% by weight, can be used in the present invention.
[0010]
The water-soluble melamine compound (C) used in the present invention is, for example, a melamine compound water-solubilized with a formalin condensate of an amine compound such as methylolated melamine or butyrolated melamine as a neutralized salt with sulfuric acid, hydrochloric acid or the like. “Melflow” (manufactured by Mitsui Toatsu Co., Ltd.), “Accelito” (manufactured by Nissan Chemical Co., Ltd.), and the like.
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, can be used in the present invention.
[0011]
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. Ethylenediamine, diethylenetriamine, trimethylenediamine , it may be mentioned triethylene tetramine, tetraethylene pentamine, m-xylylenediamine, isophoronediamine, (eg Mitsui Texaco Chemical Co., Ltd.) polyether amines a.
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. In addition, when mix | blending a water-soluble amine compound (D) with the water-system binder of this invention, the water-soluble melamine compound (C) and water-soluble amine compound (D) are mixed and used beforehand. Is preferred.
[0012]
As the thixotropic agent used in the present invention, thixotropic agents used in the fields of paints, adhesives, food additives, fillers and the like are used as they are. For example, montmorillonite, bentonite, vermiculite, kaolin, colloidal silica, silicic anhydride (e.g., trade name "Aerosil"), calcium carbonate, inorganic pulverulent material such 硅 sand, MC (methyl cellulose), HEC (hydroxyethyl cellulose), CMC ( Examples thereof include organic powders such as carboxymethyl cellulose), polyvinyl alcohol (trade name “Poval”), polymer emulsions (latexes such as SBR, NBR, and CR, acrylic polymers), fiber materials, and water-soluble materials. These may be used alone or in combination of any two or more. Among these, Aerosil, MC, cinnabar, and polymer emulsion are preferable from the viewpoint of thixotropic effect.
[0013]
In the aqueous binder of the present invention, except for the thixotropic agent, the aqueous asphalt emulsion (A), the water-soluble epoxy compound (B), and the water-soluble amine compound (D) are composed of a water-soluble binder. There are those consisting of four members added with a sexual melamine compound (C).
These mixing ratios do not include moisture in any case, and if (A) is expressed only with asphalt components, in the case of the above three, the aqueous asphalt emulsion with respect to the total of 100% by weight of the three The asphalt is preferably 25 to 85% by weight, more preferably 55 to 70% by weight, and the water-soluble epoxy compound (B) is preferably 5 to 70% by weight, more preferably 10 to 30% by weight. (D) is preferably 0.5 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, and the water-soluble epoxy, based on the total of 100% by weight of the four. The compound (B) is preferably 5 to 69.5% by weight, more preferably 10 to 20% by weight, and the water-soluble melamine compound (C) is preferably 3 to 40% by weight, more preferably 3 to 10% by weight. The functional amine compound (D) is preferably in the range of 0.5 to 10% by weight, more preferably 1.5 to 6% by weight.
The amount of the thixotropic agent added is 100 parts by weight in total of the above three or four. The range is 0.001 to 100 parts by weight, preferably 0.01 to 50 parts by weight.
[0014]
Next, the manufacturing method of the aqueous binder of this invention is demonstrated.
In the production method of the aqueous binder of the present invention, the water-soluble epoxy compound (B) is prepared in advance without mixing with other components, and other components (these may be mixed) when preparing the aqueous binder. However, when the aqueous binder has a four-component composition containing the water-soluble melamine compound (C), the water-soluble melamine compound (C) and the water-soluble amine compound (D) It is preferable to mix what has been mixed and reacted with the remaining components at room temperature at the time of use. For example, a water-soluble melamine compound (C) and a water-soluble amine compound (D) aqueous solution mixture are added to the aqueous asphalt emulsion (A), and after mixing them, an aqueous solution of the water-soluble epoxy compound (B) is added. And a method of further mixing. However, the present invention is not limited thereto, and water may be added separately from the water contained in each component as necessary.
The thixotropic 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 thixotropic agent. Similarly, for example, when preparing an asphalt mixture for room temperature pavement described later, an asphalt mixture for room temperature pavement excluding a thixotropic agent is prepared, and a thixotropic agent is added to this alone or other You may add and mix with additives other than an essential component (after-mentioned).
[0015]
To the aqueous binder of the present invention, other components such as polymer compounds, coupling agents, other emulsions, and latexes may be added at the time of the above mixing or at other times as long as the effects of the present invention are not impaired. Also good.
[0016]
Aqueous binder of the present invention can be used at room temperature, crushed stone, sand, metals, wood, plastics, helps to bind and surface protection treatment for coating various substrates such as concrete, as a specific application example, normal temperature pavement The asphalt composite material will be described. The asphalt mixture for room temperature pavement of the present invention comprises an aqueous binder and an aggregate (E).
[0017]
The aggregate (E) used for the asphalt mixture for room temperature pavement of the present invention includes coarse aggregates such as crushed stone, fine aggregates such as sand and stone powder, and solid when paved with asphalt components and other components. These aggregates are preferably selected and blended so that the particles are closely packed. Usually, the aggregate (E) contains moisture of 3% by weight or less, but may be used as it is. In the following, the weight of the aggregate (E) is based on the dry weight, and the moisture content is indicated separately.
[0018]
In the case of the above three components, the mixing ratio of the above components constituting the asphalt mixture for room temperature pavement of the present invention is such that the asphalt component in the aqueous asphalt emulsion (A) is 100 parts by weight of the aggregate (E). Preferably 0.1 to 12 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 water-soluble amine compound (D) is preferably 0.05 to 4 parts by weight, more preferably 0.08 to 1 part by weight, and the thixotropic agent is preferably 0.01 to 50 parts by weight. In the case of the above four component, the asphalt component in the aqueous asphalt emulsion (A) is preferably 1 to 30 parts by weight, more preferably 3 parts per 100 parts by weight of the aggregate (E). ~ 7 parts by weight The epoxy compound component of the water-soluble epoxy compound (B) 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. -30 parts by weight, more preferably 0.1-4.5 parts by weight, the diamine compound in the water-soluble amine compound (D) is preferably 0.01-30 parts by weight, more preferably 0.1-4.5 parts by weight. Each component of the aqueous binder and the aggregate (E) are blended so that the parts by weight and the thixotropic agent are preferably 0.01 to 50 parts by weight.
[0019]
Next, the manufacturing method of the asphalt compound material for room temperature pavement is demonstrated.
The asphalt mixture for room temperature pavement can be produced by mixing the aggregate simultaneously with the production of 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 aggregate or in the previous stage of mixing of aggregate. For example, when the asphalt mixture for room temperature pavement contains a water-soluble melamine compound (C), the water-soluble melamine compound (C) and the water-soluble amine compound (D) previously mixed and reacted are mixed at the time of mixing. It is sufficient to mix together with the remaining components of the aqueous binder at room temperature. In particular, the aqueous asphalt emulsion (A) is mixed with a mixture of water-soluble melamine compound (C) and water-soluble amine compound (D). Then, the aqueous solution of the water-soluble epoxy compound (B) and the thixotropic agent (X) can be added and mixed, and this can be added and kneaded to the aggregate (E). In addition, when not mix | blending water-soluble melamine compound (C), there is no restriction | limiting in particular in a mixing order, for example, after mixing water-soluble amine compound (D) with aqueous | water-based asphalt emulsion (A), water-soluble epoxy compound (B ), An aggregate (E), and a thixotropic agent (X) can be added and mixed. In addition, you may add water separately from the water | moisture content contained in each component as needed.
[0020]
The asphalt mixture for room temperature pavement of the present invention may contain, in addition to the above components, a polymer compound, a coupling agent, other emulsions and the like which may be contained in an aqueous binder. These other components may be added as they are during the above mixing or at other points.
[0021]
The method of using the asphalt mixture for room temperature pavement as a road pavement is not particularly limited, and after preparing the base as in the case of constructing normal heated asphalt, placing the asphalt mixture, rolling, etc. I do. The room temperature pavement asphalt mixture solidifies quickly enough to open road traffic in about 3 hours from the time when the components are mixed. Despite such rapid solidification, until the components are mixed and placed in the pavement work process, the fluidity of the composite is good and the workability is extremely excellent. In particular, the asphalt composite material for room temperature pavement of the present invention has a thixotropic agent (X) added thereto, so that it has excellent fluidity, and when the flow before and after placement is stopped, Separation between the aggregate and other components can be effectively prevented, so that there is almost no sedimentation or unevenness of the aggregate, the uniformity of the aqueous binder is imparted, and the original binder performance can be sufficiently exhibited.
In addition, even after being cast and solidified, moisture gradually scatters from the solidified material over a long period of several years, and the hardness increases accordingly. However, since the hardness of the solidified product is very high, the paved road surface does not sink due to the scattering of moisture.
[0022]
As another use of the water-based binder of the present invention, it is used as a paint for forming surface protective coatings of various substrates without adding aggregate. Further, by adding cement to the aqueous binder of the present invention in addition to the thixotropic agent, a composite material useful as a building material can be obtained.
[0023]
【Example】
EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples.
[0024]
(Evaluation items and evaluation methods)
(1) Pot life: Judgment was made by visual and tactile sensation, and the time until they changed greatly was displayed.
(2) Workability: Judged by roller compactor, visual observation, and Marshall specimen density.
(3) Dynamic stability: The mixture is inserted into a volume of 30 cm × 30 cm × 5 cm, compacted with a compaction load of 900 kgf, compaction frequency of 25 reciprocations, 100 ± 1% of the standard density, and temperature of 60 ± 2 ° C. Then, thermostatic curing was performed for 5 hours or more (surface temperature 60 ± 0.5 ° C. and normal temperature, transport load 70 ± 1 kgf), and dynamic stability was measured.
(4) Cantabro test: A test method for evaluating the resistance to scattering of aggregates in asphalt mixes, published by the Japan Road Association, "Technical Guidelines for Drainage Pavement (Draft)" (issued on November 5, 1996) No. 85-91.
[0025]
(Examples 1 to 10)
An aqueous asphalt emulsion, additive liquid AM, additive liquid DV, and additive liquid B, which are constituents of the aqueous binder, were prepared by the following method.
For the aqueous asphalt emulsion, 620 g of straight asphalt, 30 g of a nonionic surfactant (manufactured by Lion Corporation, polyoxyethylene alkyl ether type) and 350 g of water were used using a Hallel type homogenizer (SL type homogenizer manufactured by Kisho Co., Ltd.). Emulsified with straight asphalt 140 ° C. and emulsion 55 ° C.
The additive AM is prepared by thoroughly mixing and reacting 84.6 g of a water-soluble melamine compound (“Melflow” manufactured by Mitsui Toatsu Co., Ltd.), 7.7 g of diethylenetriamine (DETA) and 7.7 g of ethylenediamine (EDA). did.
The additive solution DV was stabilized by stirring and mixing 26.7 g of polyamine (“Epicure” manufactured by Yuka Shell Epoxy Co., Ltd.) with 73.3 g of a water-soluble melamine compound (“Melflow” manufactured by Mitsui Toatsu Co., Ltd.). Prepared.
As a water-soluble epoxy compound, polyglycerol polyglycidyl ether was used as additive liquid B.
[0026]
Each component then constituting the aqueous binder (aqueous bitumen emulsion, addition liquid AM, additive solution DV, additive solution A) to Aerosil as thixotropic agent, MC, 硅 sand, polymer emulsion (middle Rika Co. “Cs-1”) was quickly mixed with the formulation shown in Table 1 below (unit: parts by weight) and used as an aqueous binder.
[0027]
[Table 1]
[0028]
(Examples 11 to 32)
In order to evaluate the performance of the water-based binder, 50 kg of aggregates having particle sizes such as dense granules (13), drainage (13), etc. are blended in proportions (unit kg) shown in Table 2 below, The mixture was mixed with a mixer to obtain normal temperature mixtures (compounds). The order of addition to the mixer was as follows: aggregate, added water, and aqueous binder were added in this order. The mixing time was 90 seconds in total, and the mixture was discharged to obtain a composite material. This composite was evaluated using the evaluation items shown in Table-2. The results are shown in Table-2.
[0029]
[Table 2]
[0030]
[Table 3]
Table-2 (continued)
[0031]
[Table 4]
[0032]
(Comparative Example 1)
Asphalt mixture was prepared by blending 5.5 parts by weight of straight asphalt with 100 parts by weight of aggregate of dense particle size 13 and mixing at a temperature of 170 to 220 ° C. (Comparative Example 1).
Asphalt mixture was prepared by blending 4.2 parts by weight of straight asphalt with 100 parts by weight of aggregate of drainage (13) and mixing at a temperature of 170 to 220 ° C. (Comparative Example 2).
Table 3 shows the evaluation results of each asphalt mixture.
[0033]
[Table 5]
[0034]
As can be seen from each example and comparative example, it was found that the asphalt mixture for room temperature pavement obtained by using the aqueous binder of the present invention has performance superior to the heated asphalt mixture shown in the comparative example. It was.
In addition, the workability (workability) and performance (durability) tailored to the purpose can be obtained by changing the composition of the water-based binder and its blending amount, and the type and blending amount of the aggregate, so a wide range of applications are possible. is there.
[0035]
【The invention's effect】
The water-based binder provided by the present invention can be used as an asphalt mixture for room temperature pavement by blending aggregates, which can be applied at room temperature, greatly contributing to energy saving compared to conventional heated asphalt pavement. In addition, since it is excellent in fluidity, workability is extremely good. Furthermore, since the road can be opened approximately 3 hours after paving, it is also excellent in terms of shortening the traffic interruption time. Moreover, since the strength is high immediately after pavement, although water scatters with the passage of time, there is no concavity that accompanies it, nor the occurrence of wrinkles seen on conventional asphalt road surfaces when the temperature rises.
Further, since the thixotropic agent is added to the aqueous binder of the present invention, the fluidity is good, and the aggregate and the aqueous binder after paving can be separated, and the sedimentation and unevenness of the aggregate can be prevented. The original binder performance can be fully exhibited. Even when used as a paint, so-called sagging can be prevented.

Claims (4)

Thixotropic which is at least one selected from the group consisting of aqueous asphalt emulsion (A), water-soluble epoxy compound (B), water-soluble amine compound (D), and methylcellulose, carboxymethylcellulose, cinnabar sand, silicic acid anhydride and polymer emulsion It consists of an imparting agent (X), and the content of the thixotropic imparting agent (X) is 0.001 to 100 parts by weight with respect to 100 parts by weight of the total amount of (A), (B) and (D). cold paving asphalt mixture for aqueous binder, characterized in that. Selected from the group consisting of aqueous asphalt emulsion (A), water-soluble epoxy compound (B), water-soluble melamine compound (C), water-soluble amine compound (D), and methylcellulose, carboxymethylcellulose, cinnabar sand, silicic anhydride and polymer emulsion The thixotropic agent (X) is at least one kind, and the content of the thixotropic agent (X) is 100 wt. cold paving asphalt mixture for aqueous binder, which is a 0.001 parts by weight to parts. Surface protection coatings, characterized by containing a has been cold paving asphalt mixture for aqueous binders according to claim 1 or 2. Claim 1 or 2 cold paving asphalt mixture, characterized in that it consists of an aqueous binder and aggregate for cold paving asphalt mixture which has been described (E) to.