JP2538773B2 - Construction material for new construction or repair - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a new and useful construction material for new construction or repair, and more specifically, to asphalt or cement concrete using a specific chelate-forming component. The present invention relates to various construction materials that are useful for new construction of sites to be constructed, or for new construction of existing sites, or for repair work of existing sites, and the purpose is to provide high strength and sufficient durability. The aim is to provide a construction material that can be constructed at room temperature.

In addition, damages such as potholes and chipped corners that occur on this type of asphalt or cement / concrete pavement cause traffic accidents, and there are often cases in which the responsibility is ascribed to the road administrator. In order to deal with such an emergency, it is an object to provide a repairing construction material which has a short work time, has sufficient durability, and is inexpensive.

[Conventional technology]

The patching method is often used as a measure for emergency repairs against damage to asphalt and cement / concrete, but even with this method, asphalt / concrete or cement / concrete is directly embedded in the repaired area. On the other hand, there are a temporary method and a method of removing a defective portion and constructing and constructing a surface layer with a new material.

The former method is a repair method especially when urgent,
Generally, heated or normal temperature asphalt mixture is used. Among them, the heated asphalt mixture has good adhesion to the existing asphalt pavement, and also has excellent durability and stability, but it is not When the air temperature is low, it has to be constructed after taking measures to prevent the temperature from lowering, so it has the drawback of being extremely difficult to handle, while the room-temperature asphalt mixture has a low workability. Although good in and of itself, both stability and durability are insufficient for general use.

In recent years, for the purpose of improving the durability of a room temperature asphalt mixture, as disclosed in Japanese Patent Publication No. 59-13601, the durability is enhanced by the thickening effect of the interaction between slaked lime and tall oil. As described in Japanese Patent Application No. 60-12492, the specific epoxy resin composition is used to exert strength even in an atmosphere at a temperature around 0 ° C., and the durability is significantly improved. It is known that

[Problems to be solved by the invention]

Pavement materials such as those disclosed in Japanese Examined Patent Publication No. 59-13601 are more stable than conventional asphalt mixtures using only cutback asphalt, but are more stable than hot asphalt mixtures. The stability is low, for example, the Marshall stability at 60 ° C is very small or cannot be measured. The stability is evaluated by the Marshall stability test at room temperature as in the conventional room temperature asphalt mixture. Has been done. This is because the cutback asphalt has a high temperature sensitivity and its stability decreases as the temperature rises.

On the other hand, although the construction material as described in Japanese Patent Application No. 60-12492 has sufficient durability,
It is expensive and has a drawback of poor workability because it is a multi-liquid mixed type.

[Means for solving problems]

However, in view of the actual situation as described above, the present inventors have
It can be stored at room temperature for a long period of 1 month or more,
Construction at room temperature can be easily performed, stability and durability equal to or higher than that of general heated asphalt mixture can be obtained, and repair of new construction and existing parts that enables complete service disclosure at an early stage As a result of earnest studies for construction materials for construction, stability was improved by utilizing the chelation reaction between the hydroxide of a divalent or higher basic metal and a specific carboxyl group-containing compound. Greatly improved,
Moreover, the present invention has been completed by finding a construction material capable of improving water resistance.

That is, the present invention comprises 0.5 to 30% by weight of a hydroxide of a basic metal having a valence of 2 or more (a-1) and 10 to 9% of an aggregate (a-2).
9% by weight and 0.5 of cutback asphalt (a-3)
.About.70 wt%, and (a-1), (a
-2) and (a-3) in a total amount of 100% by weight of the mixture (A), in the presence or absence of the hydrocarbon liquid (B), an average of more than 1 carboxyl group per molecule is added. The present invention is intended to provide a construction material for new construction or repair, which is made by coating with the contained compound (C).

Here, the above-mentioned divalent or higher basic metal hydroxide (a-1) refers to a metal hydroxide that undergoes a chelation reaction with a carboxyl group-containing compound (C) as described below. Of these, calcium hydroxide, zinc hydroxide, magnesium hydroxide, aluminum hydroxide and the like are typical examples.

The above-mentioned aggregate (a-2) is a natural or artificial additive aggregate, fine aggregate or stone powder.

Furthermore, the cutback asphalt (a-
3) is a substance capable of softening asphalt, such as heavy oil, light oil, kerosene, gasoline, engine oil, and various hydrocarbon liquids such as vegetable oil, and refers to the softened asphalt.

On the other hand, the compound (C) containing an average of more than one carboxyl group per molecule described above [hereinafter referred to as polyvalent carboxylic acid (C). [1] Polycarboxylic acid itself such as (1) succinic acid, adipic acid, isophthalic acid, terephthalic acid or trimellitic acid,
(2) In addition to the polyvalent carboxylic acids listed above, polyvalent carboxylic acid anhydrides such as maleic anhydride or phthalic anhydride, and ethylene glycol, propylene glycol,
Diethylene glycol, dipropylene glycol, 1,3
A polyhydric alcohol such as butanediol, 1,4-butanediol, neopentyl glycol, 1,6-hexanediol, trimethylolpropane, pentaerythritol or dipentaerythritol, or ethylene oxide or propylene oxide addition of these polyhydric alcohols Polyester or a terminal carboxyl group-containing polyester obtained by esterification of a monoglyceride or the like obtained by transesterification of a product or various fats and oils with various polyhydric alcohols as described above, (3) fatty acid to Diels There is so-called dimer acid and the like which is derived by a conventional method through an alderization reaction.

If necessary, a monocarboxylic acid such as a fatty acid may be used in combination with each of these polyvalent carboxylic acids (C).

As the polyvalent carboxylic acids (C), "average per molecule is 1
The definition of "a compound containing more than one carboxyl group" is given when the number of carboxyl groups per molecule is 1 or less, in short, 1 in one molecule.
In the case of a compound having not more than 3 carboxyl groups (that is, a monocarboxylic acid) itself, or in the case of a carboxylic acid having an average of less than 1 carboxyl group per molecule such as tall oil fatty acid, It is not preferable because the high molecular weight is not obtained by the chelation reaction with the above-mentioned divalent or higher valent basic metal hydroxide (a-1).

In addition, various polyvalent carboxylic acids (C) as described above
And a mixture with a monocarboxylic acid such as a fatty acid, the above definition of “compound containing an average of more than one carboxyl group per molecule” is applicable,
Of course, it corresponds to the polyvalent carboxylic acids (C).

Further, as the above-mentioned hydrocarbon liquid material (B),
Typical examples are heavy oil, light oil, kerosene, gasoline, engine oil and vegetable oil as mentioned above.

In preparing the construction material for new construction or repair of the present invention using various raw materials as mentioned above, a hydroxide (a-1) of a divalent or higher basic metal, an aggregate ( a-
2) and the cutback asphalt (a-3) as essential components, and the metal hydroxide (a-1), respectively.
5-30% by weight, preferably 1-20% by weight, more preferably 3-15% by weight, aggregate (a-2) 10-99% by weight, preferably 60-95% by weight, more preferably 80- 92% by weight, cutback asphalt (a-3) 0.5-70% by weight, preferably 0.5-30% by weight, more preferably 1
Within the range of up to 15% by weight, and these (a-1),
The total of each of the essential components (a-2) and (a-3) is 10
1 of the mixture (A) containing 0% by weight
0 to 20 parts by weight of the hydrocarbon liquid (B), preferably 0 to 15 parts by weight, and 0.5 to 20 parts by weight of the polyvalent carboxylic acid (C), relative to 00 parts by weight, preferably Is 1
~ 15 parts by weight of the mixture (A) is coated with the polyvalent carboxylic acid (C), or the mixture (A) is coated with the hydrocarbon liquid (B) and the polycarboxylic acid (C). I'll do it.

Further, in preparing such a construction material for new construction or repair, various kinds of filler (filler) such as slag, rubber elastic body or calcium carbonate, or the above-mentioned mixture is added to the mixture (A) as required. Various organic amine compounds or the like for neutralizing the polyvalent carboxylic acids (C) may be used in combination, and on the other hand, various organic solvents or diluents may be used in combination with the polyvalent carboxylic acids (C). You can also

Further, the construction material for new construction or repair of the present invention may contain a coloring agent such as a valve stem.

The construction material of the present invention thus obtained is asphalt.
For construction or repair of various construction sites such as roads including concrete or cement / concrete surfaces, pavements (pavements), bridges, parks, parking lots, factory floors, etc. Used for.

In particular, when used for new installations, natural aggregates and coloring materials can be artificially combined to create natural beauty, and it is also possible to model, and further, to places or parts that require dust protection. The construction material of the present invention is extremely useful.

〔Example〕

Hereinafter, the present invention will be described in more detail with reference to Reference Examples, Examples, and Comparative Examples. In the following, “%” means “% by weight” unless otherwise specified.

Reference Example 1 [Compounding Example of Aggregate (a-2)] A composite aggregate (a-1-1) was prepared according to the blending ratio shown in Table 1.

Reference Examples 2 to 4 (Preparation Example of Solution II) As shown in Table 2, the polyvalent carboxylic acids (C) alone or the polyvalent carboxylic acids (C) and the hydrocarbon-based liquid (B) are used. Solution II of the mixture was prepared.

Examples 1 to 3 and Comparative Examples 1 and 2 First, of the composite aggregate (a-1-1) obtained in Reference Example 1
After mixing 86.8% with 7.5% of slaked lime and then mixing 2.85% of this with cutback asphalt as solution I, each solution II obtained in Reference Examples 2 to 4 was mixed with 2.85% respectively. The construction materials were obtained by mixing in a ratio.

The construction material thus obtained was stored at room temperature, and the storage days were 1, 7, 28 and 56 days, and the specimens were prepared by compacting each side 50 times at 25 ° C.

Then, for each of these specimens, the residual stability was determined in order to evaluate the Marshall stability at 60 ° C. and the water resistance by the method described in the asphalt pavement steel.

 The test results are shown in Table 3.

In addition, as a comparative example, a heated asphalt mixture (Comparative Example 1) and a conventional room temperature asphalt mixture (Comparative Example 2) using only cutback asphalt as a binder were used. Was prepared and evaluated by the same test method. The test results are also summarized in the same table.

As such a result shows, the construction material of the present invention is actually constructed on a new road surface, and repairs the damaged portion on the existing road surface, and the service is disclosed immediately after construction,
In the case of Example 3, although a slight amount of scattering of the aggregate was observed, no trouble was observed in the serviceability, and even after one month has passed since the construction, Examples 1 and 2 are still present.
Also in the cases of 3 and 3, no change such as damage on each road surface was observed.

[Effect of the present invention] As is clear from the results shown in Table 3, the construction material of the present invention can be stored for at least one month and can be constructed at room temperature, and after the construction, it is equivalent to or a hot asphalt mixture. It is known that the above stability and water resistance can be obtained.

As a result, it is possible to repair an urgent pothole or a corner chip in a short time, and also it has sufficient durability, which in turn contributes to the reduction of traffic accidents.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yoshimin Araki 1602-2 Kamishitashi, Kisai-cho, Kita-Saitama-gun, Saitama Prefecture (72) Inventor Kenichiro Nomura 2-11-30 Minami, Satte-machi, Kitakatsuka-shi, Saitama (72) Invention Person Hiroshi Mita 4-3-2 Kameyama Minami, Asa-ku, Hiroshima City (56) References JP-A-55-66955 (JP, A) JP-B-59-13601 (JP, B2)

Claims (1)

(57) [Claims] 1. A hydroxide (a-) of a basic metal having a valence of two or more.
0.5 to 30% by weight of 1), 10 to 99% by weight of aggregate (a-2), and 0.5 to 70 of cutback asphalt (a-3).
And (a-1), (a-
The mixture (A) in which the total of 2) and (a-3) is 100% by weight is added with an average of more than 1 carboxyl group per molecule in the presence or absence of the hydrocarbon liquid material (B). A construction material for new construction or repair, which is covered with the compound (C) contained.