JPH09132902A - Freezing restraint construction method of draining pavement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain influence of air temperature on a paving body and to restrain freezing of it in the winter season by mixing a material having an antifreezing effect in cork particulates and press fitting and injecting the cork particulates in a cavity between coarse aggregates. SOLUTION: Cork particulates 3 are previously crushed, a material having an antifreezing effect such as propylene glyucol is mixed, aggitated and impregnated and spread over a paving surface. Thereafter, they are press fit and injected in a cavity between rough aggregates 1 while applying vibration and a load on them by a vibrational roller. Thereafter, a gelling agent, a binding agent, a fixing agent, etc., are sprayed and fixed on the paving surface from which the cork particulates 3 remaining on a pavement surface are collected by a sweeper, etc., and removed. Additionally, after finishing penetrating work, the fixing agent applied on the rough aggregates 1 exposed on the surface of paving surface is removed by the sweeper, etc. Consequently, it is possible to make it easy to melt ice on a road surface by blocking outside air temperature by the cork particulates 3 and to shorten a period of time of snow and ice remaining on the road surface by allowing accretion of ice only on the surface.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a drainage pavement in which voids are formed between coarse aggregates, and it is possible to suppress freezing that occurs on the surface of a pavement when it is constructed in a cold region for a relatively long period of time. The present invention relates to a method for controlling the freezing of drainage pavements that can perform

[0002]

2. Description of the Related Art Conventional pavement that has been conventionally performed in snowy and cold regions has vehicle tires that are being replaced by studless tires, and therefore the number of accidents increases as slip resistance decreases on snow and ice roads. Therefore, it is becoming a big social problem, and there is an urgent need to establish an economical and effective antifreezing means.

Therefore, various freezing-suppressing pavements which can promote effects such as thin freezing in the freezing-suppressing pavement, freezing-suppressing effect under thin snow pressure, reduction of the spraying amount of the antifreezing agent, and ease of snow removal work have been studied. The reality is what we are doing.

As typical methods of this antifreezing pavement, a chemical antifreezing method of adding chloride or the like to the asphalt mixture, and a method of adding rubber particles or the like to the asphalt mixture to impart elasticity to the pavement, There is a physical freezing control method by breaking freezing with the weight of the vehicle.

The effect of these freezing control methods is that the above-mentioned chemical method has a snow depth of 5 cm or less and -4 ° C or more, and the physical method has a freezing thickness of 0.5 cm or less and has a -5.
It is reported that the effect is achieved at ° C or higher.

On the other hand, in a drainage pavement in which voids are formed between coarse aggregates and drainage is performed from the voids, excellent properties such as drainage property, safety of automobile running, and noise reduction effect are evaluated, It has been adopted from general warm regions to cold snow regions, and its applications are expanding.

[0007]

However, the drainage pavement in the cold region is affected by the outside air temperature inside the pavement due to the voids between the coarse aggregates, and the pavement temperature is 1 to 2 ° more than that of the normal pavement.
C is low, snow and freezing on the road surface are quick, and 0 ° C
The duration of the following will be longer, making it difficult for ice on the road to melt.

[0008] When snow or ice enters the void and freezes, it tends to be more difficult to remove ice than in ordinary pavement, and the period of snow and ice remaining on the road surface becomes longer, which delays the melting of the snow and ice road surface in winter. Therefore, it is necessary to take measures to prevent freezing in winter for drainage pavement in snowy and cold regions where snow and ice roads are prone to occur.

The present invention is intended to solve the above-mentioned problems, and its purpose is to exhibit the effect as a drainage pavement except in winter, and in winter, the cork particles filled in the voids of the coarse aggregate. The purpose of this is to provide a method for preventing the freezing of drainage pavements, which is capable of exerting the same effect as that of freeze-up inhibition pavement and covering the weaknesses of drainage pavement in winter.

[0010]

Means for Solving the Problems The method for controlling freezing of drainage pavement according to the present invention is intended to achieve the above-mentioned object, and the means is to provide a surface of drainage pavement in which voids are formed between coarse aggregates. It is characterized in that cork particles are sprayed and the above-mentioned cork particles are pressed into the gaps between the coarse aggregates to fill them.

The filling of the cork particles between the coarse aggregates is performed by applying a pressure to the cork particles to reduce the volume,
By releasing the pressure after the filling is completed, the gap between the coarse aggregates is made to be close to a seal and the cork particles are fixed between the coarse aggregates. Therefore, the pavement surface and the gaps under the coarse aggregates are separated. As a result, snow and ice can be easily removed from the pavement surface.

Further, not only is the rise of water from the lower surface side of the pavement reduced to prevent icing on the upper surface of the pavement, but at the time of spraying the antifreezing agent, freezing from the voids between the coarse aggregates in the drainage pavement is also performed. Since the flow of the anti-freezing agent is blocked and stays on the pavement surface, the amount of the anti-freezing agent applied can be reduced.

Further, in the method of the present invention, the cork particles which are sprayed on the surface of the drainage pavement and filled in the spaces between the coarse aggregates are mixed and impregnated with a substance having an antifreezing effect such as propylene glycol. It is desirable to absorb it by such means.

Further, in the method of the present invention, a mixture of a substance having an antifreezing effect, a gelling agent, a solidifying agent and the like is injected as a fixing agent on the surface of the drainage pavement filled with the cork particles. Then, it is desirable to settle in the space between the coarse aggregates.

A substance having an antifreezing effect such as propylene glycol absorbed by the cork particles, a substance having an antifreezing effect which is injected when the cork particles are fixed in the voids between the coarse aggregates, a gelling agent, a solid The fixing agent, which is a mixture of binders and the like, promotes the effect of suppressing freezing of cork particles in drainage pavement.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The cork used in the present invention is produced from the bark of cork oak, which is a natural resource, and its safety has been proven for a long time, and 85% of its volume is composed of gas. Cork particles that have been crushed have the property of decreasing in volume when pressure is applied and returning to the original volume when pressure is removed.

The cork particles as they are, or the cork particles are mixed with and impregnated with a substance such as propylene glycol having an antifreezing effect and then sprayed on the pavement surface, and a fixing agent comprising a gelling agent, a solidifying agent, etc. To fix it on the surface of new or existing drainage pavement.

The dispersed cork particles are filled in the gaps between the coarse aggregates of the drainage pavement by using a machine such as a vibrating roller, or instead of absorbing the substance having the antifreezing effect, the Japanese Patent Application No. The filled cork particles are fixed together with the gelling agent and the solidifying agent by the method described in the antifreezing pavement and the pavement method thereof described in 5-264957.

That is, when the method described in Japanese Patent Application No. 5-264957 is used, on the day when the road surface is dry before it gets really cold, the drainage pavement is filled with cork particles. A freezing inhibitor consisting of an antifreeze such as propylene glycol is sprayed as it flows, and is absorbed by the cork particles between the coarse aggregates of the drainage pavement, and at the same time fine pores that exhibit capillary action between the coarse aggregates and the cork particles. To adhere to.

When the antifreeze material consisting of the antifreeze liquid thus sprayed on the road surface is absorbed by the cork particles or adheres by the capillary phenomenon, the antifreeze material does not remain on the road surface, so that slips in normal times will not occur. In addition, since the cork particles retain the antifreezing material even in the slope portion, the antifreezing is performed in all road conditions.

The above-mentioned filled cork particles have a heat-retaining effect and the property of absorbing glycols, which is one of the substances having an antifreeze effect, and have elasticity similar to that of rubber. In some cases, there is only a deformation and there is almost no reduction in volume.

On the other hand, since the cork particles decrease in volume due to pressure, when pressure is applied to the voids between the coarse aggregates, the volume is restored after the pressure of the indentation disappears, and the inside of the voids is reduced. It will be filled in a stable state.

[0023]

EXAMPLE FIG. 2 is an enlarged sectional view of a drainage pavement according to an embodiment of the present invention, in which 1 is a coarse aggregate of this drainage pavement and 2 is a space between them. It is carried out by the conventional method, and there is no inconvenience such as the reduction of the strength of the pavement surface in the construction of the present invention, either new construction or existing construction is possible, but in the case of existing construction, there is clogging, so cleaning is performed. It is necessary to restore the drainage function.

The cork particles 3 were previously crushed to a size of 1.0 to 1.8 mm and impregnated with 30% by weight of propylene glycol as a substance having an antifreezing effect by mixing and stirring. 1 on the paved surface A like
Cover with a thickness of ~ 20 mm.

While this is being vibrated and loaded from above by a vibrating roller (not shown), it is pressed into the void 2 of FIG. 2 so as to be filled, and after the filling is completed, the surface of the drainage pavement is left over. The remaining cork particles 3 are collected by a sweeper or the like, and the collected cork particles 3 can be reused.

On the paved surface A from which the extra cork particles 3 have been removed, a gelling agent, a solidifying agent, a fixing agent or the like is sprayed by the method described in Japanese Patent Application No. 5-264957, and the cork particles are injected. Fix to 3.

After completion of such infiltration work, the paved surface A
The fixing agent coated on the coarse aggregate 1 exposed on the surface of is removed by a rubber rake or a sweeper to form a freeze-suppressing drainage pavement filled with the cork particles 3 of this embodiment shown in FIG. .

[0028]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, since the outside air temperature is blocked by the cork particles filled in the voids between the coarse aggregates, and the inside is hardly affected by the outside air temperature, the temperature of the pavement in the normal pavement is reduced. Can be directly affected by the temperature, and can solve the problem that the ice on the road surface of conventional drainage pavements is difficult to melt.

Moreover, in the conventional drainage pavement, when snow or ice enters the voids and freezes, the period in which the snow and ice on the road surface remains is longer than in the case of normal pavement. Since the inundation is dammed, the ice accretion is only on the surface, and the remaining period of snow and ice on the road surface can be greatly shortened.

The amount of the antifreezing agent to be sprayed does not flow out from the void as in the conventional drainage pavement, and the amount of the antifreezing agent to be sprayed can be reduced and the chemical damage caused by the antifreezing agent that has flowed out can be prevented.

Further, since the filled cork particles have elasticity, it may be possible to break ice due to the weight of the vehicle.
The anti-freezing effect similar to that of conventional granular rubber-based pavement can be considered.Furthermore, the anti-freezing agent absorbed by the cork particles on the pavement surface freezes when the cork particles exude from the exposed part of the pavement surface. Is suppressed.

The cork particles are often filled on the surface side of the pavement scattered and do not reach the deep part of the pavement. Therefore, during repeated snowfall and freezing in winter, the cork particles gradually adhere to the snowflakes or ice pieces and the cork particles gradually If lost or cork particles remain, cleaning is performed to remove the clogging, and by the end of the winter season, the function as drainage pavement before construction is restored.

[Brief description of the drawings]

FIG. 1 is an enlarged cross-sectional view of a drainage pavement surface constructed by the method of the present invention.

FIG. 2 is an enlarged cross-sectional view of the same as above before construction.

FIG. 3 is an explanatory view for filling a cork showing a construction state.

[Explanation of symbols]

 1 coarse aggregate 2 voids 3 cork particles

Claims (3)

[Claims] 1. Drainage characteristics characterized by spraying cork particles on the surface of a pavement in which voids are formed between coarse aggregates, and filling the voids between the coarse aggregates by press-fitting the cork particles. Freezing control method for pavement. 2. A substance having an antifreezing effect such as propylene glycol is admixed with the cork particles, which are sprayed on the surface of the drainage pavement and filled in the voids between the coarse aggregates, by a means such as mixing or impregnation. The anti-freezing construction method for drainage pavement according to claim 1. 3. A rough aggregate is prepared by injecting a mixture of a substance having an antifreezing effect, a gelling agent, a solidifying agent, etc. as a fixing agent on the surface of drainage pavement in which cork particles are filled between the coarse aggregates. The method for preventing freezing of drainage pavement according to claim 1, characterized in that the cork particles filled in the voids with the coarse aggregate are fixed.