JP2002129507A - Asphalt paving material and paved road using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an asphalt paving material imparting flexibility and sound- absorbing qualities to a paved surface and being capable of inhibiting or reducing an increase in cost, attaining even the lightening of a paved layer after the execution of works simultaneously and a paved road using it. SOLUTION: The asphalt paving material uses asphalt and normal inorganic aggregate as main components and is obtained by containing bamboo fibers obtained by crushing a bamboo material as scrap wood and waste, and the paved road is paved by the asphalt paving material. An arbitrary colorant is added to asphalt, using asphalt as a decoloring system while a modifier for asphalt increasing the mechanical strength of 5-12 wt.% bamboo fibers is contained up to 1% as a particularly preferable composition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an asphalt pavement material and an improvement of a pavement passage using the same, and more particularly to an asphalt pavement material having flexibility and a pavement passage using the same.

[0002]

2. Description of the Related Art Conventionally, asphalt pavement materials have been widely used as road pavement materials. In this asphalt pavement, usually, a mixture obtained by mixing asphalt with an inorganic aggregate such as crushed stone appropriately mixed in particle size is heated and spread on a road subgrade, and this is sufficiently compacted with a compaction roller to form the inorganic bone. The materials are bonded and fixed with asphalt.

[0003] As described above, ordinary asphalt pavement is formed to be as strong as possible, and therefore has relatively high mechanical strength such as compressive strength. There was a surface that transmitted to the waist and was not always optimal for walking. Also, for example,
In the case of a golf course cart path, there were also problems such as difficulty in walking with spiked shoes due to the hard surface, and unexpected jumping when the golf ball dropped. Furthermore, depending on the footwear, there may be loud walking noise, and it is expected that the noise absorption around the aisle will be improved by improving the sound absorption, and the density of the conventional asphalt pavement material is 2. Since the weight is about 3 g / cm ³ , further weight reduction has been expected.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is intended to impart flexibility and sound absorption to a pavement surface. Provided are an asphalt pavement material and a pavement passage using the same, which can suppress or reduce the increase in cost while simultaneously achieving weight reduction.

[0005]

The present invention, which has solved the above-mentioned problems, is characterized in that a bamboo fiber obtained by crushing a bamboo material is contained in a mixture mainly composed of asphalt and an inorganic aggregate. Asphalt pavement material and a pavement passage paved using the asphalt pavement material have a basic configuration. Further, the present invention described above can be embodied as a form containing 4 to 15% by weight of bamboo fiber, and further contains a modifying material containing 5 to 12% by weight of the bamboo fiber and increasing the mechanical strength. It is preferably embodied as a form containing up to 1%.

The pavement passage of the present invention can be applied to various pavement passages, and the effect is particularly remarkable when used as a golf course cart.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of an asphalt pavement material of the present invention and a pavement passage using the same will be described. First, the asphalt pavement material of the present invention has a feature of the present invention in that a bamboo fiber obtained by crushing a bamboo material is contained in a mixture mainly composed of an inorganic aggregate such as asphalt, crushed stone, and sand. .

[0008] Asphalt materials used in the present invention are not particularly limited to ordinary black asphalt, straight asphalt, and other types, but a type that can be finished with high strength is selected in view of the mixing of bamboo fibers. Is advantageous. Considering that a preferable coloration is given to the pavement passage, a bleached asphalt that can obtain a brown or green coloration is suitable. As the inorganic aggregate, conventionally used aggregates such as ordinary crushed stone, for example, hard sandstone or crushed No. 6 or 7 crushed stone, coarse sand, fine sand, and stone powder can be used without any trouble.

The bamboo fiber which is characteristically blended in the present invention is obtained by crushing bamboo material waste produced by cutting bamboo forests and bamboo material waste such as moso bamboo bamboos harvested in miscellaneous forests, and drying it if necessary. Although the fiber length is not limited, the average length is preferably about 2 to 10 mm in consideration of the mixing efficiency in the mixture plant.
In the present invention, the type of bamboo is not limited to Moso bamboo, and the degree of crushing may be appropriately set according to the purpose of use of the pavement passage, and there is no problem even if powders or those exceeding 20 mm are mixed. .

In the asphalt pavement material of the present invention, by using the bamboo fiber in this way, the flexibility inherent in the bamboo material can be imparted to the main asphalt pavement, and the waste material and the bamboo material as waste can be effectively used. Since it can be used, it is possible to reduce the material cost of pavement passages or suppress the cost increase, which is economically practical, and has a special advantage in terms of utilization and reuse of waste resources. Is obtained. Further, as will be described later, there is also obtained an advantage that a pavement passage having sound absorption and lightening can be formed.

In the asphalt pavement material of the present invention,
The content of bamboo fiber is 3 to 20% by weight, preferably 4 to 15%.
% By weight. The reason is that if the content is less than 4% by weight, the effect of the inclusion of bamboo fiber cannot be sufficiently exhibited, and if it exceeds 15% by weight, the mixing operation with other materials in the mixture plant becomes extremely difficult, so that practical use is not possible. Because it is not a target. Further, in view of the preferable mechanical strength of the paving material after construction, a more preferable composition is such that the bamboo fiber is 5 to 1%.
It contains 2% by weight and contains up to 1% of an asphalt modifier for increasing mechanical strength. Here, the modifier is an additive containing an appropriate synthetic resin component for increasing the mechanical structural strength after pavement construction.

As a method for producing such asphalt pavement material, all the materials may be mixed and mixed in a mixing plant at the same time, or the mixture may be divided into two or more steps. For example, asphalt pavement materials include a method of mixing asphalt and a modifying material, as in the case of mixing a plant at the time of production in a mixture plant (plant mix), and a method of mixing asphalt (premix) before mixing. The same result can be obtained in the case of (1), and it goes without saying that the method of mixing the asphalt and the modifier may be either.

Next, an embodiment of a pavement passage using the asphalt pavement material of the present invention will be described. This pavement passage is constituted by asphalt and inorganic aggregate as described above as main components, and paved using asphalt pavement material of each of the above-mentioned forms containing bamboo fiber obtained by crushing bamboo material. Is done. And the pavement method is a means of the conventional pavement method,
There is an advantage that the operation can be applied almost as it is. And, the pavement passage of the present invention has its flexibility, sound absorption,
Due to advantages such as light weight or cost, it is also preferable to target a golf course cart path, a shopping street walking path, a path provided on a platform of a station, a path provided on a bridge and other various simple paved roads. It is made.

In particular, when the golf course is used as a path for a cart in a golf course, spike shoes are easy to walk, and when a golf ball falls, the repulsive force is reduced to about half of that of a conventional asphalt pavement path. It is especially effective, and if you use a decolorized one as an asphalt material, it can also be used for soil and lawn colors around a golf course just by mixing and coloring brown or green pigments. So it will be interesting and decorative.

Next, some examples (1 to 6) of the present invention are shown in Table 1 in comparison with the case of a conventional asphalt pavement material (Comparative Example 11).

[0016]

[Table 1]

Asphalt, various crushed stones shown in Table 1 above,
Sands, stone powder, bamboo fiber, and the like were blended at the respective blending ratios to prepare a pavement sample. The bamboo fiber was obtained by crushing, crushing and drying Moso bamboo. To samples 3 to 6, a hardway (trade name, manufactured by Denki Kagaku Kogyo Co., Ltd.) was added as an asphalt modifier for increasing the mechanical structural strength after paving.

Next, the lower part of Table 1 summarizes the test performance of the pavement passage paved with the paving material of each sample according to the above-mentioned composition. According to this, the pavement passage of the present invention is made of a conventional asphalt pavement material (sample No. 1).
Compared to 1), it is more flexible, has sound absorption,
It is understood that the weight is reduced.

Further, in the stability which is a measure of the compressive strength,
Although the value of the example is lower than that of the comparative example (sample No. 11), even when the bamboo fiber is contained at 4% or more, the pavement passage which requires flexibility, except for the pavement surface for severe use, Can be applied effectively. Further, as in samples 2 to 5, those containing 5 to 12% by weight of bamboo fiber and 0.4% of a reinforcing modifier such as a hardware (trade name) provide practical stability. Therefore, it can be used particularly preferably.

In Table 1, the stability is a value measured by a Marshall stability test method, and the sound absorption is a normal noise measurement method for a sound when a steel ball is dropped from a height of 5 cm. Was evaluated using a value (dB) measured by using. Regarding the flexibility, in the walking test using spiked shoes, a case of a clearly soft touch was indicated by Δ, and a case of a clearly hard touch was indicated by X.

The advantages of the above-described asphalt pavement material of the present invention and the pavement passage using the same, except for the cost, are summarized as follows. (1) The pavement surface is rich in flexibility and has little impact on feet and waist. Because it is more flexible than ordinary asphalt pavement,
Less recoil and impact. From this point, when used for pavement of a cart path in a golf course, the impact on spike shoes worn by a player is reduced, and a rebound against a golf ball is conventionally 70% in a drop test from 100 cm.
In contrast, the present invention is reduced to about 30 cm, whereas the present invention has the advantage of reducing the inconvenience that the dropped ball will bounce irregularly or give an unusually long run. Further, even when used in a walking passage such as a shopping street, a soft touch is obtained, which is preferable.

(2) It has excellent sound absorbing properties and does not generate impact noise. As shown in Table 1, the pavement passage according to the present invention is excellent in sound absorption, so that an abnormal sound generated as in the case of the conventional asphalt pavement surface is prevented, so that the pavement passage in a golf course can be used. It is suitable. Also, there is no walking noise,
Since the noise around the passage is absorbed, it is also suitable for a walking passage in a shopping street or the like. (3) The weight can be reduced. As illustrated in Table 1, the density of the pavement surface after the construction is 1.42 to 2.08 / 2.34 =
Since there is an advantage that the weight can be reduced to nearly 40% as in the case of 0.61 to 0.89, it is particularly suitable for use as a paved passage intended for a passage provided on a bridge.

(4) Others Asphalt pavement material of the present invention can utilize bamboo logging waste material and reuse resources. Since the manufacturing process is not complicated, it can be manufactured by a normal asphalt mixture plant. In addition, the construction method can be easily performed using conventional equipment and methods that are not much different from ordinary asphalt pavement materials. Since water is stored in the bamboo fiber portion of the pavement material, there is an advantage that a water-retentive pavement passage can be easily formed.

[0024]

According to the asphalt pavement material of the present invention and the pavement passage using the same, it is possible to impart flexibility and sound absorption to the pavement surface, and simultaneously achieve a reduction in the weight of the pavement layer after construction. In addition, there is an excellent effect that the cost can be suppressed or reduced. Therefore, the present invention solves the conventional problems, and is extremely useful as an asphalt pavement material applicable to various uses such as a pavement path for a golf course cart and a pavement path in a shopping street, and a pavement path using the same. .

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tadashi Kato 2-46 Nishizaki-cho, Ogaki-shi, Gifu F-term (reference) in Kiken Corporation 2D051 AB05 AE04 AF17 AG01 EA06

Claims (5)

[Claims] An asphalt pavement material characterized in that a bamboo fiber obtained by crushing a bamboo material is contained in a mixture mainly composed of asphalt and an inorganic aggregate. 2. The asphalt pavement according to claim 1, which contains 4 to 15% by weight of bamboo fiber. 3. The asphalt pavement material according to claim 1, comprising 5 to 12% by weight of bamboo fiber and up to 1% of a modifier for increasing mechanical strength. 4. A pavement passage, which is paved with the asphalt pavement material according to claim 1, 2 or 3. 5. The pavement passage according to claim 4, which is intended for a cart passage in a golf course.