JP2002206203A - Method for utilizing cut powder of dry-type grooving construction method and filler for pavement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively utilize cut powder generated when a paved surface is grooved and executed. SOLUTION: Cut powder generated by dry-type grooving is sucked from a section in the vicininy of a cutter and recovered under a dry state so as not to be discharged to the outside, and lime stone powder is utilized as fillers for asphalt pavement by adding a proper quantity of lime stone powder or without the addition of it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of using cutting powder of waste generated during grooving for forming a groove on a pavement road surface.

[0002]

2. Description of the Related Art In recent years, a grooving method for forming a groove on a pavement surface of a road or a runway has improved a grip performance between a tire and a road surface, and has a large surface area of a pavement surface to absorb and accumulate solar heat to make a road surface. Freezing is being prevented.

[0003]

In the grooving, a groove is formed in a longitudinal direction or a transverse direction of a pavement surface by a plurality of rotary blades, and water is used to cool the rotary blade. However, the mixture of pavement cuttings and water turned into industrial waste, and mud had to be collected and disposed of.

Therefore, a dry grooving method has been proposed in which the rotary blade is cooled by an air flow, and the cutting powder is recovered and disposed of in a dry state by the air flow. Since this method does not use water, the cutting powder can be collected as it is. However, since the cutting powder itself is an industrial waste and needs to be disposed of, the effective use of the cutting powder is required.

[0005]

The present invention utilizes cutting powder generated by a dry grooving method as a filler for asphalt pavement.

[0006] In the asphalt pavement material, an aggregate and a filler are mixed with the asphalt in order to improve flow resistance and abrasion resistance. As the filler, limestone powder is most often used, but it has been studied to use fly ash, a by-product generated by pulverized coal combustion in a thermal power plant, as the filler.

In the present invention, the cutting powder produced by the dry grooving method means cutting powder generated when a groove is formed on a pavement surface without using water, regardless of the type of pavement or the type of grooving machine.

[0008]

EXAMPLE Cutting powder generated when grooving was performed on an asphalt pavement road surface by the dry grooving machine shown in FIG. 1 was collected by suction. The properties are shown in FIG. 2, and the particle size distribution is shown in FIG. The average specific gravity of the cutting powder is 2.597, and the 50th percentile particle size is 0.09 mm. A marshall test was carried out using the asphalt concrete of this kind and two types of asphalt concrete for a general area and for a snowy cold region.

FIG. 4 shows the properties of asphalt for general areas and for snowy and cold regions. For asphalt concrete for general area, 0, 50, 100
%, And the balance was ordinary stone powder as a filler. In asphalt concrete for snowy and cold regions, the amount of cutting powder was set to 0 and 100% as a filler.

FIG. 5 shows the mixing ratio of the aggregate. The results of the marshall test, flow test, and residual stability of the coarse-grained asphalt concrete for the base layer and the asphalt-stabilized mixture for the upper subgrade in this composition are shown in FIG. 6 and FIG.

As apparent from the results shown in FIG. 6, the filler for asphalt pavement according to the present invention is different from conventional stone powder in coarse-grained asphalt concrete.
Although the stability is slightly large, the difference is 100%.
kgf, and the flow value is slightly smaller.

Further, from the test results shown in FIG. 7, the asphalt-stabilized mixture did not show the slight difference observed in the coarse-grained asphalt concrete, and had almost the same characteristics as the case where conventional stone powder was used as the filler. From the above, it was confirmed that the cutting powder obtained by the dry grooving method generally has the same performance as the conventional filler made of stone powder, and there is no problem even if it is replaced with 100% stone powder. did.

[0013]

The cutting powder generated in the dry grooving method has the same performance as commonly used stone powder and filler of asphalt concrete, and has a stable quality that does not adversely affect the flowability of asphalt. It is no longer necessary to dispose of the cutting powder as industrial waste, and a path has been opened for the effective use of the cutting powder generated in the grooving method.

[Brief description of the drawings]

FIG. 1 is a perspective view of a dry grooving apparatus.

FIG. 2 is a table showing properties of asphalt pavement cutting powder.

FIG. 3 is a particle size distribution diagram of cutting powder.

FIG. 4 is a table showing properties of asphalt.

FIG. 5 is a mixing ratio table of aggregate.

FIG. 6 shows the results of a coarse-grained asphalt concrete marshalling test.

FIG. 7 shows a marshall test result of an asphalt stabilization mixture.

Claims (3)

[Claims] 1. A method for recovering cutting powder generated when forming a groove on a pavement surface by a dry grooving method and using the cutting powder as a filler for asphalt pavement. 2. The method according to claim 1, wherein the cutting powder is collected by suction. 3. An asphalt pavement filler containing cutting powder generated when grooving a pavement road surface.