JPH05117531A - Asphalt composition and uses thereof - Google Patents

Abstract

(57) [Summary] [Structure] JIS Z8801 in petroleum asphalt
FRP crushed material that passed the 12.7 mm standard sieve of
An asphalt composition and its use, which comprises 10% by weight. The thus-obtained asphalt composition of the present invention exhibits the following effects due to the resin constituting the FRP ground product and the reinforcing material such as glass fiber. In other words, the resin improves the compatibility with asphalt,
The reinforcing material contributes to the increase in rigidity around 60 ° C. These combined effects lead to improved marshall stability and dynamic stability due to wheel tracking. This leads to improvement of flow resistance of asphalt composition such as rut prevention, and improvement of durability such as crack prevention, various heated asphalt composition described in paving summary, and blue-blue stable treatment. It is applied to mixtures.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is a novel and useful asphalt composition which is particularly excellent in fluidity resistance and crack resistance, and a composition using the composition.
The present invention relates to paving materials and waterproofing materials.

More specifically, the present invention relates to, in part, an asphalt composition containing petroleum asphalt and an FRP ground product, and a paving material and a waterproofing material using the composition. And petroleum asphalt, coarse aggregate and / or fine aggregate, and FR
The present invention relates to an asphalt composition composed of a P pulverized product, and a paving material and a waterproof material using the composition.

[0003]

By the way, in asphalt pavement,
Several methods have been proposed in which a so-called reinforcing material is used to restrain the shearing force inside the asphalt mixture and thus reinforce the asphalt mixture.

That is, for example, Japanese Patent Laid-Open No. 2-2438-2
No. 01 publication discloses an asphalt mixture in which short fibers of polyoxymethylene filaments having a tensile elastic modulus of 20 GPa or more are mixed, while Japanese Patent Publication No. 3-24503 discloses MgSO4 / 5MgO.・
Asphalt mixtures have been proposed in which fibrous or acicular additives such as 8H2O are mixed.

However, in the case of these methods described above, the tensile elastic modulus is too low, or the fiber length is too short, so that the reinforcing material for the fluid-resistant pavement asphalt mixture is eventually taken. Has a drawback that the effect as is small.

[0006]

As described above, as far as the prior art is complied with, it is extremely difficult to obtain an asphalt composition having extremely high practicability which simultaneously satisfies the flow resistance and the crack resistance. However, it is the actual situation.

[0007] Therefore, the problem to be solved by the present invention is to provide an asphalt composition having excellent flow resistance and crack resistance, among others, and at the same time, to provide the asphalt composition. It is also to provide a paving material and a waterproofing material, respectively, used.

That is, the object of the present invention is to provide a highly practical asphalt composition which can prevent ruts and cracks in asphalt pavement and can be easily laid on roads. In addition,
The use of the asphalt composition is to provide a waterproof material having excellent waterproof property and strength.

[0009]

Therefore, the present inventors have
Focusing on the above-mentioned problems to be solved, as a result of earnestly studying, as a result, by adding the FRP pulverized product that has passed the 12.7 mm standard sieve to petroleum asphalt, it is possible to improve the flow resistance for the first time. Of asphalt mixture with excellent properties and crack resistance,
Furthermore, the present invention has been completed by finding a waterproof material having excellent waterproof property and strength. The present invention will be described in detail below.

[0010]

That is, the present invention is basically intended to provide an asphalt composition which is a mixture of petroleum asphalt and a specific FRP ground product, or petroleum asphalt and coarse bone. The present invention is intended to provide an asphalt composition which is a mixture of wood and / or fine aggregate and FRP ground material. In addition, each of these asphalt compositions is used as a paving material and a waterproofing material. The use of the composition is also intended to be utilized.

Specifically, the present invention provides an asphalt composition, which comprises adding to a petroleum asphalt a specific FRP crushed product called an FRP crushed product that has passed through a 12.7 mm standard sieve and blended. And

Alternatively, in the present invention, a specific FRP crushed product, which is a FRP crushed product that has passed through a 12.7 mm standard sieve, and coarse aggregate and / or fine aggregate are added to and mixed with petroleum asphalt. Is intended to provide an asphalt composition consisting of

Further, the present invention is intended to provide the use of each of these specific asphalt compositions as paving materials and waterproofing materials.

Here, if only representative examples of petroleum asphalt are exemplified, JIS
K-2207. Further, only one representative example of one FRP crushed product is a FRP crushed product defined by JIS Z-8801 and passing a 12.7 mm standard sieve.

That is, the above-mentioned petroleum asphalt is
Among them, petroleum asphalt specified in JIS K-2207 is straight asphalt with a relatively low softening point used mainly for pavement, or relatively softened used mainly for waterproofing work. It refers to blown asphalt, which has a high score.

Further, the above-mentioned coarse aggregate used in the present invention refers to an aggregate having a particle size of 5 mm or more, while the above-mentioned fine aggregate is a bone having a particle size of 2.5 mm or less. It refers to the material.

Such aggregates include, first of all, natural aggregates and artificial aggregates. Typical examples of the former aggregate include river gravel, river sand, mountain gravel, mountain sand, sea gravel, and sea sand, while the latter is particularly representative. For example, rocks, clay, etc., and further processed products such as industrial by-products are crushed stones, crushed sand, silica sand, slag crushed stones, crushed sand, artificial light weight, etc. Is.

It is needless to say that a fine powder used as a filler may be used in combination with a part of the aggregate. By the way, the "petroleum asphalt" used in the present invention refers to the petroleum asphalt itself, and is referred to as the Japan Road Association [hereinafter referred to as the "Japan Road Association". ] Issued "Asphalt Pavement Guideline" (1988 edition) [Hereinafter, it is abbreviated as coating guideline. ]
In addition to the standard mixture of various asphalt mixtures, that is, petroleum asphalt, which is also referred to as pavement asphalt mixture containing aggregate as described on page 50 of ,

Above all, a heated asphalt mixture which is required to be improved in fluidity resistance and crack resistance, or an asphalt mixture which is required to have deflection resistance and high temperature stability, and a bitumen stabilization treatment mixture. Is.

The above-mentioned FR used in the present invention
The P crushed product is, among others, the FRP crushed product defined by JIS Z-8801 that has passed through a 12.7 mm sieve, and is, for example, a finely crushed product of a known and commonly used FRP molded product using a crusher. It refers to a powdery material.

That is, the FRP is a reinforced plastic obtained by compounding a thermosetting resin matrix and a fiber reinforced material, and first of all, only representative examples of the thermosetting resin matrix are given. The unsaturated polyester resin, the vinyl ester resin, the epoxy resin, the acrylic resin and the like can be used, but the unsaturated polyester resin is preferably used.

On the other hand, to exemplify only the typical fiber reinforced materials for such FRP, various organic fibers such as amide, aramid, vinylon, polyester or phenol, as well as glass fiber; Carbon fibers, metal fibers, ceramic fibers, or a combination of these, among others, are glass fibers or organic fibers.

If necessary, the FRP used in the present invention further contains a filler. As the above-mentioned filler, of course, known ones are used, but among them, only typical ones are exemplified by calcium carbonate powder, clay, alumina powder, silica powder, talc, Examples thereof include barium sulfate, silica powder, glass powder, glass beads, mica, aluminum hydroxide, cellulose thread, silica sand, river sand, cold water stone, marble scrap or crushed stone.

The so-called intermediate molding material obtained by forming the above-mentioned raw materials into a sheet or a bulk is called SM.
These intermediate molding materials are referred to as C and BMC, and are used for various housing members and automobile parts such as bathtubs and water tanks.

More specifically, in more detail, first of all, SMC is a resin paste in which a resin is mixed with a filler, a curing material, a release agent or a chemical thickener, and a glass fiber reinforcing material is used. It was impregnated into a sheet, molded into a sheet, and aged until it thickened to the degree of dryness to the touch. On the other hand, BMC was kneaded by adding glass chop etc. to the resin paste. It is a thing.

By the way, the state before crushing the above-mentioned FRP crushed material used in the present invention is generally as follows.
It is preferable to use FRP molded articles used for various purposes. That is, for example, various construction materials such as corrugated plate / flat plate, dome, capsule house or concrete formwork; various housing members such as bathtub, unit bath, waterproof pan, toilet tank or septic tank; fishing boats or leisure Various boats or ships such as boats;

Various industrial equipment such as pipes, housings or electric parts; various tanks / containers such as water tanks, silos or containers; various miscellaneous goods such as safety caps, mannequins, playground equipment or trays; Various automobile parts such as passenger cars, trucks or motorcycles, outer plate parts, interior parts, or under chassis / under bonnet parts or parts for railway vehicles,
Wide range of FRP including various cars and vehicles
Examples include molded products.

These FRP molded products are molded by various known and conventional methods. The FRP crushed product, in particular JIS
The FRP crushed product that has passed through the 12.7 mm sieve specified in Z-8801 is crushed by various known and commonly used methods, and generally, it is 3 to 1 by a crusher.
The process is roughly crushed to 0 cm, then crushed to a desired size, and then taken out by air transportation or the like.

At this time, depending on the production capacity and the mechanical design, there are cases in which the steps from coarse crushing to intermediate coarse crushing to fine crushing are adopted. And the particle size of the final FRP pulverized product is about 0.01 to 15 mm,
From the relationship of compaction degree when used as a paving material, the maximum particle diameter is 12 mm or less and the average particle diameter is 0.5 to 6
The range of mm is suitable.

The FRP crushed product, in particular JIS Z-8
The amount of the FRP crushed powder that has passed the 12.7 mm sieve specified in 801 is appropriately within the range of 1 to 10% by weight in the total aggregate amount excluding the asphalt content from the total asphalt mixture. .

If it is less than 1%, the effect of fluidity resistance is inevitably small. On the other hand, if it exceeds 10%, the compaction property is inevitably poor, and the porosity becomes large, and the Marshall stability and Dynamic stability and so on,
The reason for this is that the target asphalt composition cannot be obtained.

The FRP crushed product, in particular JIS Z-8
As the content of the reinforcing material of the FRP crushed product that has passed the 12.7 mm sieve specified in 801, on a weight basis,
It is in the range of 5 to 50% by weight, but preferably 25
The range of up to 35% by weight is suitable.

The production and transportation of the asphalt composition of the present invention, the method of construction using the composition, etc.
A publicly known and commonly used method as described in the paving outline of the Japan Road Association can be used as it is.

[0034]

EXAMPLES Next, the present invention will be described with reference to Examples and Comparative Examples.
Although more specifically described, in the following, all "parts" and "%" are based on weight unless otherwise specified.

The outline of experiments in each of the examples and comparative examples will be described below. That is, first, Examples 1 to 3
Is a mixture of 3% of FRP pulverized products having an average particle diameter of 6 mm, 2 mm and 0.5 mm, respectively, as a substitute for stone powder, and then, in Examples 4 and 5, Average particle size of 6 mm and 2 mm, respectively
The following two kinds of FRP pulverized products are mixed by increasing the amount to 8%.

All pavement formulations are based on dense-grained ascon, but the amount of asphalt shows the ratio to the total amount of aggregate and filler of 100 parts. Further, in both Examples 6 and 7, the mixing amount of the FRP ground product was 1
%, And the experimental composition when used in combination with stone powder with an extremely small amount.

Next, Comparative Example 1 is an example of standard dense-grained Ascon, and shows an experimental formulation in the case where the use of FRP ground material was completely absent. Example 1 A used bathtub made of an SMC material having a glass content of 28% was roughly crushed to 50 to 60 mm with a shredder "VW-520L" manufactured by Morita Seiki Co., Ltd., and then crushed. An FRP pulverized product having an average particle diameter of 6 mm was prepared with a machine "JC-10L".

Then, this FRP crushed product was heated and mixed with dense-grained ascon of the method specified in the paving guideline issued by the Japan Road Association, and moved by a test body for Marshall characteristic value test or wheel tracking. A test piece for dynamic stability was prepared and subjected to an evaluation test. The results are shown in Table 1.

Examples 2-7 and Comparative Example 1 Example 1 except that the changes were made as shown in Table 1.
Each test body was produced in the same manner as in.

Next, the results of the evaluation test will be described. Generally, the standard value for the Marshall characteristic value has a stability of 50.
At 0 kg, the degree of saturation is 7 within the range where the porosity is 3 to 6%.
Within the range of 0 to 85%, and the flow value is 20 to 40
(1/100 cm).

Further, the dynamic stability due to wheel tracking has no particular reference value, but according to the conventional actual value, it is generally 500 to 700 (times / m).
m).

Looking at each of the examples and comparative examples in comparison with each of these reference values, the Marshall stability indicating the strength of the paving material is 1 to 7 for the marshalling examples. It reaches over 1,000 kg.

Further, the other Marshall characteristic values, that is, the porosity, the degree of saturation, and the flow value, are within the standard values for all the examples. Further, the value of the dynamic stability by wheel tracking, which shows the fluidity resistance and the crack resistance, clearly shows the effect of mixing the FRP pulverized product, and, except for Example 3, The products of Examples 1 to 5 show extremely high values of about 2,000 (times / mm) or more.

The use of the standard FRP ground product is
It will be known how the effect of the composition of the present invention is remarkable as compared with the example of the missing dense-grained ascon, that is, the product of Comparative Example 1.

However, in particular, as far as only the dynamic stability is concerned, in the cases of Examples 6 and 7 in which the amount of the FRP ground material mixed is small, the value becomes smaller than the other Examples. There is.

[0046]

[Table 1]

[0047]

[Footnotes in Table 1] The numbers of each compounding ingredient in Table 1 mean "part". Regarding the particle size of the FRP ground product, the numerical value in parentheses means the average particle size.

[0048]

[Table 2]

[0049]

[Table 3]

[0050]

[Table 4]

Example 8 Using the asphalt composition in which the weight ratio of FRP ground product to straight asphalt (60 to 80) used in Example 1 was 5 to 95, No. 6 crushed stone 32 parts No. 7 crushed stone 21 parts Fine sand 13 parts Fine sand 6 parts Stone sand 28 parts Asphalt composition 8.2 parts ─────────────────────────────── A goose asphalt for waterproofing having a composition was prepared.

Next, the waterproof goose asphalt was poured onto a steel deck with a thickness of about 30 mm under the paving conditions where the temperature at the time of discharging the cooker was 215 ° C. After that, sprinkle crushed stone chips here with a chip spreader, press the chips with a small iron roller,
Finished paving.

Even after 2 years of service, there were no noticeable changes, and the waterproofing effect was extremely perfect, and the improvement of durability such as crack prevention was also effective. It has been done.

[0054]

The thus obtained asphalt composition of the present invention, that is, petroleum asphalt,
FRP crushed product, especially 1 described in JIS Z-8801
An asphalt composition consisting of the addition of a FRP grind that has passed a 2.7 mm standard sieve, or
Since coarse aggregate and / or fine aggregate and FRP pulverized product, in particular, FRP pulverized product that has passed the 12.7 mm standard sieve described in JIS Z-8801 are added to petroleum asphalt. The asphalt compositions each of which exhibits the following effect, that is, a synergistic effect, by the resin constituting the FRP pulverized product and various reinforcing materials such as glass fiber.

That is, the resin for constituting the FRP ground product contributes to the improvement of the compatibility with petroleum asphalt, while the reinforcing material such as glass fiber contributes to the increase of the rigidity at around 60 ° C. .

These effects (synergistic effects) lead to improvement of Marshall stability and dynamic stability due to wheel tracking. This leads to improvement of flow resistance of the asphalt composition such as rut prevention, and also to improvement of durability such as crack prevention, and various heated asphalt compositions and gravel described in the paving summary. It is applied to blue-stabilized mixture.

Claims (6)

[Claims] 1. An asphalt composition comprising petroleum asphalt and an FRP ground product. 2. An asphalt composition comprising petroleum asphalt, coarse aggregate and / or fine aggregate, and FRP ground material. 3. A paving material using an asphalt composition containing petroleum asphalt and an FRP ground product. 4. A paving material using an asphalt composition consisting of petroleum asphalt, coarse aggregate and / or fine aggregate, and FRP ground material. 5. A waterproof material using an asphalt composition containing petroleum asphalt and an FRP ground product. 6. A waterproofing material using an asphalt composition comprising petroleum asphalt, coarse aggregate and / or fine aggregate, and FRP pulverized material.