JP2004092207A - Construction method of road surface - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To ensure a set road surface using rubble stone by one process without being required for two processes of a shot blasting process and a polishing process. <P>SOLUTION: An asphalt mixture consisting of at least the rubble stone 3 except sand used for aggregate, silica gel and asphalt is smoothly spread on the road surface 9, cement paste 23 or mortar is injected from the road surface to permeate and after the elapse of a certain time to solidify it, the cement paste or the mortar is removed from the surface of the rubble stone 3 while rotating a rotational body 5 formed of a non-woven fabric in the shape of a drum in a state to make linear contact, and the surface of the exposed rubble stone 3 simultaneously makes polish finishing. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a road surface construction method suitable for a test course road or the like of an automobile or the like.
[0002]
[Prior art]
In general, there is a low μ road surface having a low coefficient of road surface friction using a cobblestone as a test traveling road of an automobile.
[0003]
For a test road surface using cobblestones, after spreading the asphalt mixture mixed with cobblestones on the road surface, expose the cobblestone by shot blasting, and polish the exposed cobblestone surface with a rotating brush that comes into surface contact. , A low μ road surface can be obtained.
[0004]
[Problems to be solved by the invention]
The test road surface using cobblestones always requires two steps, a shot blasting step to expose cobblestones and a polishing step to polish the cobblestone surface exposed by shotblasting, and the cobblestones are rounded as a whole In this case, the grip force for holding the cobblestone is weakened, and depending on the location, there is a possibility that a problem such as slipping out during a test run may occur.
[0005]
In order to solve this problem, in general, a strong gripping force is secured by spreading an asphalt mixture of sand and stone powder on a road surface in addition to a cobblestone.
[0006]
FIG. 6 shows a schematic view of a low μ road surface using a cobblestone 101 which is a conventional test road surface. The road surface for the test is, for example, the surface of the asphalt mixture 105 including the cobblestone 101 spread on the road surface 103 is shot-blasted to expose the surface of the cobblestone 101, and then the cobblestone exposed by the rotating brush 107. By polishing the surface of 101, a low μ road surface can be obtained.
[0007]
In this case, when the surface of the cobblestone 101 is exposed by shot blasting and the particles of the sand 109 mixed at the same time become exposed between the cobblestones 101 and 101, even if the rotating brush 107 is acted from above, the particle Can not be removed due to the small size, which appears as slip resistance between the boulders 101 and the boulders 101, causing problems such as the inability to obtain the set low μ road surface. It is.
[0008]
Accordingly, an object of the present invention is to provide a road surface construction method that can reliably obtain a set low μ road surface using a cobblestone without requiring two steps of a shot blast step and a polishing step.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, according to claim 1 of the present invention, at least an asphalt mixture consisting of boulders, stone powder, and asphalt, excluding sand serving as an aggregate, is spread on a road surface, and a cement paste is placed thereon. Or after injecting and infiltrating mortar and curing for a certain period of time, remove the cement paste or mortar from the boulder surface while rotating the rotating body formed in a drum shape by a non-woven fabric in line contact, and remove the exposed boulder surface It is characterized by being polished at the same time.
[0010]
Thereby, the cobblestone can obtain a strong gripping force with cement paste or mortar even without sand. On the other hand, by rotating the rotating body made of non-woven fabric, the concentrated pressure due to line contact and the action between the boulders removes the cement paste or mortar from the boulder surface and simultaneously polishes the exposed boulder surface. I do. At this time, a low μ road surface set by the polished cobblestone surface is obtained without sand as a running resistance. In addition, the work process can be completed by one process using the rotating body.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be specifically described with reference to FIGS. 1 to 5.
[0012]
FIG. 1 is a schematic explanatory view of a road surface 1 serving as a test course road according to the present invention.
[0013]
The road surface 1 is a low μ road surface 7 in which the surface of the boulder 3 is polished by the rotating body 5.
[0014]
The asphalt mixture constituting the low μ road surface 7 is at least the above-mentioned cobblestone 3 and stone powder and asphalt (all of which cannot be represented in the drawings, so the symbols are omitted) except for sand serving as an asphalt finisher. Is spread on the road surface 9 by the paving machine. In this case, as shown in the drawing, the cobblestone 3 is laid as shown in FIG. On the other hand, in the asphalt mixture, other aggregates can be added to the cobblestone 3, stone powder, and asphalt as a compounding material, except for sand.
[0015]
The cobblestone 3 is preferably a natural one rather than an artificial one. The rotating body 5 that exposes and grinds the surface of the cobblestone 3 is formed of a nonwoven fabric into a long drum shape in the vehicle width direction, and is used in a state of line contact.
[0016]
Specifically, for example, as shown in FIG. 5, the rotating body 5 is rotatably supported by a support frame 15 supported by a hydraulic device 13 that can move up and down, behind a riding work machine 11, The rotational power from the drive motor 17 is provided via a conduction belt 19.
[0017]
A downward force F is applied to the rotating body 5 by a pair of left and right counterweights 21 (the opposite sides are not shown) provided on both sides of the support frame 15, so that the surface of the boulder 3 is applied to the rotating body 5. As a result, it is possible for the concentrated pressure on the wire to act, and to enter between the boulders 3 and to act reliably.
[0018]
In addition, as a suitable compounding ratio of the asphalt mixture 7, asphalt is 5 to 8 parts by weight and stone powder is 7 to 8 parts by weight with respect to 100 parts by weight of the cobblestone 3.
[0019]
Next, the construction method of the road surface 1 will be specifically described. As shown in FIG. 2, at least an asphalt mixture including cobblestone 3, stone powder, and asphalt, excluding sand serving as an aggregate, is uniformly spread on the road surface 9. After curing for a certain period of time, as shown in FIG. 3, a paste-like cement paste 23 or mortar is poured between the cobblestones 3 with a rake and a vibrating roller (both not shown), and flattened. Spread them all over. The cement paste 23 penetrates between the cobblestones 3 as shown in the figure, and a gripping force for firmly gripping the cobblestones 3 from the surroundings is ensured.
[0020]
Next, after a certain period of time, the cement paste 23 is partially cured from the surface of the boulder 3 while being rotated in a state in which the rotating body 5 formed of a nonwoven fabric in a drum shape is in line contact as shown in FIG. The removed and exposed surface of the cobblestone 3 is simultaneously polished.
[0021]
At this time, the cobblestone 3 can obtain a strong gripping force due to the cement paste 23, has no sand that becomes a slip resistance, and has a low μ set by the polished cobblestone 3 surface as shown in FIG. The test road surface 1 of the road surface 7 is reliably obtained. In addition, the working process can be completed by one process using the rotating body 5, and the polishing operation can be completed quickly.
[0022]
In this embodiment, a test road surface has been described, but a normal road surface may be used.
[0023]
【The invention's effect】
As described above, according to the first aspect of the present invention, since there is no sand as slip resistance, a low μ road surface set by a polished cobblestone surface can be obtained.
[0024]
In addition, since the work process can be performed by only one process using the rotating body, the work efficiency can be significantly improved.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory view of a road surface construction method according to the present invention.
FIG. 2 is a schematic explanatory diagram in which an asphalt mixture is spread.
FIG. 3 is a schematic explanatory view in which a cement paste is poured after the asphalt mixture is spread.
FIG. 4 is a schematic explanatory diagram when a road surface is completed.
FIG. 5 is a schematic explanatory view in which a rotating body is mounted and supported on a riding work machine.
FIG. 6 is an explanatory diagram of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Road surface 3 Cobblestone 5 Rotating body 7 Low μ road surface 9 Road surface 23 Cement paste

Claims (1)

Except for sand used as aggregate, at least a cobblestone, stone powder, asphalt mixture composed of asphalt is spread on the road surface, cement paste or mortar is poured and infiltrated therefrom, and after a certain period of time, hardened, and then formed into a drum by a nonwoven fabric A road surface construction method, comprising removing a cement paste or mortar from a cobblestone surface while rotating the formed rotating body in a line contact state, and simultaneously polishing the exposed cobblestone surface.

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