JP3059566B2 - Paving method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paving method using a pavement material to which rubber particles are added.

[0002]

BACKGROUND OF THE INVENTION Paving with special asphalt mixtures mixed with rubber particles is known, and some have already been practiced. This special pavement is composed of aggregate 1, asphalt 2, filler and rubber particles 3, as shown in FIG.

According to this pavement, since the rubber particles have elasticity, the icing layer is crushed by the load of the traveling vehicle, and an icing prevention effect can be obtained. Further, the slip resistance of the pavement surface is increased, excellent abrasion resistance is obtained, and an effect of reducing noise generated between the tire and the road surface is also obtained. Furthermore, the rubber particles dispersed throughout the layer have excellent flexibility at low temperatures as well as at high temperatures, and are less likely to crack.

[0004] In the above-described pavement method, there is a problem that the above-described effects are reduced when rubber particles fall off from the surface of the paved road.

[0005] It is an object of the present invention to provide a pavement method using a pavement material to which rubber particles are added, to improve durability and to make it difficult for rubber particles to fall off the surface of the pavement.

[0006]

According to the present invention, there is provided a pavement method using a pavement material to which rubber particles are added, wherein the laid pavement material is compacted by a vibrating roller at a temperature of 80 ° C. or less. It is characterized in that a prestress is applied to the rubber particles.

[0007]

[Function] When the laid pavement material becomes 80 ° C or less,
The adhesive strength of asphalt in paving materials increases. Here, if the compaction is performed by the strong energy of the vibrating roller,
The rubber particles are deformed under the prestress, and are fixed in this state by the adhesive force of the asphalt.

[0008]

EXAMPLE A manufacturing process of a pavement material used in this example will be described. First, normal temperature rubber particles are put into the heated aggregate. Next, normal temperature rubber particles are charged. The rubber particles are partially melted by the heat of the aggregate and adhere to the aggregate.

Next, stone powder is charged and dry-mixed for 20 to 30 seconds. Next, asphalt is injected into the mixer, and wet mixing is performed for 30 to 50 seconds. On the way, the additive is injected.

In the ordinary pavement material manufacturing process, wet mixing takes 35 to 40 seconds. In this embodiment, however, the mixing time is slightly longer as described above because rubber particles are added to the material.

In the above process, if the stone powder is introduced before the rubber particles are introduced, the stone powder sticks to the aggregate and the aggregate and the rubber particles do not adhere to each other. The durability becomes insufficient.

Next, a method of paving using the paving material manufactured as described above will be described. First, remove dirt, mud, floating stones, etc. from the pavement surface and clean them.

Next, the paving material is laid on a pavement surface using an asphalt finisher. The material temperature at this time is 140 to 150 ° C.

When the material temperature has dropped to about 130 ° C. after laying, initial rolling is performed using a Macadam roller to uniform the density of the pavement material.

Next, when the temperature of the pavement material has dropped to 80 ° C. or less, secondary rolling is performed using a vibrating roller. The secondary rolling of the present embodiment is performed at a lower temperature than that of a normal pavement method, and uses a vibrating roller that generates more energy than a tire roller used in a normal method. As a vibration roller, a horizontal vibration roller is more effective than a vertical vibration roller.

The asphalt contained in the paving material has a high fluidity at a high temperature and a low adhesive strength. However, when the temperature reaches about 80 ° C. as in the secondary rolling in the present method, the adhesive strength becomes considerably large. Here, if rolling is performed with a large energy of the vibrating roller, the rubber particles in the material are deformed under prestress and fixed by asphalt in the deformed shape. That is, the restoration of the compressed rubber particles is suppressed by the adhesive force of the asphalt. Also, the entire pavement material is compacted by receiving the energy of a large rolling compaction, and the density is increased.

Next, finish rolling is performed using a tire roller. By this step, the surface of the pavement is finely finished.

According to the above steps, the rubber particles in the pavement adhere to the aggregate, and the rubber particles are fixed in a prestressed state. Therefore, the rubber particles hardly fall off from the surface of the pavement, and the durability of the pavement becomes extremely high.

[0019]

According to the paving method of the present invention, the pavement material is securely compacted by using the vibrating roller at the time of the secondary rolling, and the temperature of the pavement material in the same step is kept at 80 ° C. or less. The rubber particles therein are incorporated into the asphalt in a prestressed state.

Therefore, according to the present invention, there is an effect that the pavement durability using the pavement material to which the rubber particles are added is improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a pavement using a pavement material to which rubber particles are added.

[Explanation of symbols]

 1 aggregate 2 asphalt 3 rubber particles

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) E01C 7/32 E01C 7/26 E01C 19/28

Claims (1)

(57) [Claims] 1. A pavement method using a pavement material to which rubber particles are added, wherein the laid pavement material is compacted by a vibrating roller at a temperature of 80 ° C. or less to apply a prestress to the rubber particles. And paving method.