JPH10121028A - Adhesion inhibitor for heated asphalt paving mixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adhesion inhibitor which can effectively prevent the adhesion of an asphalt paving mixture, can be used irrespectively of the type of the compactor used such as a tire roller of an iron roller, is very safe in respect of handling and storage and does not cause any environmental problem. SOLUTION: This inhibitor inhibits a heated asphalt paving mixture from adhering to e.g. a compacting means when e.g. a road is paved with the mixture by compacting. It is prepared by mixing 15wt.% (±5wt.%) sodium alkyl sulfate with 20wt.% (±5wt.%) sodium alkyl ether sulfate, 55wt.% (±5wt.%) water and 9.95wt.% (±5wt.%) coconut oil. The inhibitor having the above composition is mixed with water to form a 1/3 diluted solution.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antiadhesive agent for a heated asphalt mixture, and more particularly to an asphalt mixture for rolling a heated asphalt mixture onto a road or athletic field to form a pavement. Is effectively prevented from adhering to the roller surface of the rolling means, and does not attack the pavement surface or the roller surface, and components remaining after use do not cause pollution. It relates to an inhibitor.

[0002]

2. Description of the Related Art As part of a technique for paving a wide range of surfaces such as roads and athletic fields, heated ground asphalt is spread over the ground, and the heated asphalt is spread over tire rollers and roads. 2. Description of the Related Art Construction work for uniform pavement using rolling means such as rollers is widely known.

[0003] The order of applying this pavement to an unpaved road is, for example, to clean the surface of the road (base), apply a prime coat (having an adhesive effect between the base and asphalt mixture), 2. Description of the Related Art It has been practiced to roll a base layer and a surface layer made of asphalt mixture, and to apply a seal coat for improving water resistance in some cases. The asphalt mixture used for pavement is also called asphalt mastic, and is generally a mixture obtained by filling asphalt with an aggregate (mainly crushed stone or stone powder) or the like. The asphalt is a dark solid or semi-fixed, obtained as a distillation residue of non-paraffinic crude oil, which is liquefied by heating. Asphalt as used herein also includes bitumen, which is a naturally occurring asphalt-like hydrocarbon mixture.

The asphalt mixture is heated to about 115 to 165 ° C. by a heater such as a petroleum burner and then transferred to, for example, a dump truck bed, and dropped from the bed onto the ground already prepared for road use. Supplied. The heated asphalt mixture deposited on the road due to the fall is spread to some extent even by a rake or the like, and then gradually revolved by rolling means described below on the asphalt mixture to gradually flatten. It is rolled and pavement is constructed.

Examples of the above-mentioned rolling means include a tire roller in which a large number of rubber tires are worn in parallel in the axial direction, a so-called road roller in which two iron cylindrical rollers are provided at the front and rear,
A so-called combined roller or the like in which the rubber tire roller and the iron cylindrical roller are provided before and after is suitably used. The surface of the carrier of the dump truck that transports the heated asphalt mixture is formed of a smooth metal surface. As a type of pavement construction machine, an asphalt finisher that heats asphalt mixture loaded on a hopper with a gas burner and drops the required amount while moving the heated asphalt mixture along the road surface to be paved. Is also known.

[0006]

As described above, in order to pave a road or the like, a heated asphalt mixture is spread on a road surface or the like to a required thickness, and then uniformized by a rolling means such as a tire roller. It is necessary to compact the rolling so that it becomes a flat surface. However, since the viscosity of the asphalt mixture in the heated state is high, the asphalt mixture adheres to the surface of the tire roller or the iron roller at the time of rolling, and further, the adhered portion gradually grows into a layer. There are difficulties. If the heated asphalt mixture adheres to the roller surface as described above, unevenness is formed on the pavement surface to be rolled by the roller, so the attached asphalt mixture must be constantly scraped off from the roller surface with a scraper or the like. There is. Although the loading platform of the dump truck that transports the heated asphalt mixture has a metal surface as described above, the disadvantage that the asphalt mixture partially adheres to the surface of the loading platform also occurs.

Therefore, in order to prevent the heated asphalt mixture from adhering to the roller surface of the compacting means or the surface of the bed of the dump truck, oil such as light oil or heavy oil is sprayed and applied to these surfaces. Traditionally implemented on site. However, light oil or heavy oil reacts to the vulcanizing component of a rubber tire such as a tire roller and erodes the surface of the tire, thereby significantly reducing the life of the tire. In addition, the oil component is not preferable in terms of the composition of the asphalt mixture, and the pavement surface that has been flattened by the compaction has already been damaged by the transfer of the oil component at the time of completion.
For this reason, it is pointed out that a trace of the pressure roller tends to remain on the pavement surface.

Therefore, instead of using oil such as light oil or heavy oil, some other means have been proposed for preventing the asphalt mixture from adhering to the surface of a pressure roller or the like. For example, glycol-based asphalt mixture adhesion inhibitor,
This is a release material based on silicone oil and a silicone-containing nonionic surfactant. The former can be used for both tire rollers and iron rollers.However, liquids remaining on the roller surface and pavement surface after pavement work become a source of pollution due to the main oil component. There are still significant problems from the viewpoint of environmental conservation, such as the need to request a pickup.

In addition, since the latter is mainly composed of petroleum components, it is designated as dangerous goods corresponding to Class 4 and Class 4 petroleums of the Fire Service Law, and there is a drawback that the handling thereof requires great care. In addition, when storing, it is necessary to comply with the laws and regulations for the storage of dangerous substances of Class 4 and Petroleum 4 specified in the Fire Service Law described above, and there is a drawback that the place where the anti-adhesion agent is stored is specified. In addition, since the anti-adhesion agent is petroleum-based, the life of a rubber tire roller such as a tire roller is deteriorated, which is not preferable.The anti-adhesion agent can only be used for an iron roller or a bed surface. There are various drawbacks such as the above-mentioned difficulty that the pavement surface is affected by petroleum components.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks inherent in the prior art asphalt mixture antiadhesive agent, and has been proposed to solve these problems suitably. Of course, it can be used without choosing the type of tire roller, iron roller, etc., and it is extremely safe in handling and storage, and does not cause pollution problems. It is intended to provide an inhibitor.

[0011]

SUMMARY OF THE INVENTION In order to overcome the above-mentioned problems and to achieve an initial object, the present invention provides a method for rolling a heated asphalt mixture onto a road or the like to form a pavement. An anti-adhesion agent for preventing adhesion to rolling means or the like, comprising 15% (± 5%) of sodium alkyl sulfate, 20% (± 5%) of sodium alkyl ether sulfate and 55% of water (± 5%) and 9.95% (± 5%) of coconut oil.

Another object of the present invention is to overcome the above-mentioned problems and to achieve an initial object by using an asphalt mixture which is compacted when a heated asphalt mixture is rolled on a road or the like to form a pavement. An anti-adhesion agent for preventing adhesion to a means or the like, comprising sodium alkyl sulfate sodium 1
5% (± 5%), 20% (± 5%) of sodium alkyl ether sulfate, 55% (± 5%) of water, and 9.95% (± 5%) of coconut oil It is characterized in that water is added to the undiluted solution to make a diluent at a ratio of 1: 3.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an anti-adhesion agent for asphalt mixture according to the present invention will be described with reference to preferred embodiments. The anti-adhesion agent of the present invention has an advantage that it is particularly excellent in adaptability to the environment and is non-polluting since it contains a stock solution composed of a surfactant of a natural substance as a main component, and therefore does not adversely affect workers handling the same. There is.

The stock solution of the anti-adhesion agent according to the preferred embodiment of the present invention comprises the following basic components. (1) Sodium alkyl sulfate 15% (± 5%) (2) Sodium alkyl sulfate 20%
(± 5%) The above two points are industrial surfactants that can be easily obtained, and are chemically stable and have strong detergency as compared with general soaps. (3) Water 55% (4) Coconut oil 9.95%

If necessary, the following components are added. (5) Antifoaming agent Since the stock solution is basically a surfactant, it easily generates a large amount of foam when used. Therefore, it is added for the purpose of suppressing the generation of bubbles. As this defoaming agent, for example, higher fatty acid alcohol or the like is suitably used, and it is preferable to add about 8% to the total amount of the stock solution. (6) 0.05% lemon acid as a fragrance

The stock solution of the anti-adhesion agent for the asphalt mixture does not contain any components such as phosphorus, fluorescent whitening agent, enzyme, bleaching agent and coloring agent. When using this stock solution,
After diluting with water so as to have a ratio of undiluted solution 1: water 3, this diluted liquid is applied to the roller surface of the above-mentioned compacting means (tire roller, road roller, etc.) or the surface of the bed of a dump truck by using a required means. .

In this case, the water for diluting the undiluted solution may be ordinary tap water, but it is recommended to use pure water in order to maintain the shelf life. As a practical matter, it is generally difficult for a user to dilute the stock solution at an appropriate ratio (1: 3) with water at a construction site. Therefore, it is preferable to dilute in advance a ratio of stock solution 1: pure water 3 before shipment from a factory, fill the diluted solution into a 20-liter quantitative container, and sell the container together with the container. Since a normal tire roller generally has a 5,000 liter water tank, the diluted inhibitor in the 20 liter container is charged into the 5,000 liter tank so that a standard amount of asphalt mixture can be obtained. The anti-adhesion agent can be prepared very easily. In the case of a load roller provided with iron rollers before and after, or a combined roller provided with rubber rollers and iron rollers before and after, a supply of an antiadhesion agent diluted to a standard amount is supplied from a water tank of the tire roller. It is recommended that

When the anti-adhesion agent according to the embodiment was used for all of a tire roller having a rubber tire, a load roller having an iron roller, and a combined roller using both a rubber tire and an iron roller, the heated asphalt mixture was applied to the roller surface. The problem of sticking was completely prevented. In addition, since the anti-adhesion agent was a natural component, there was no concern that it would damage rubber tires or pavement surfaces, and no roller marks remained on the pavement surfaces. Moreover, since it is a natural component, it is extremely safe in handling and storage, and the anti-adhesion agent remaining on the roller surface or pavement surface after use does not become a pollution source.

[0019]

As described above, the anti-adhesion agent for the heated asphalt mixture according to the present invention effectively prevents the heated asphalt mixture from adhering to the roller surface of the rolling means or the dump truck carrier. In addition, since the rubber tire and the pavement surface are all formed of natural components, no roller marks remain on the pavement surface. Moreover, since it is a natural component, it is extremely safe to handle and store, and has many advantages such as the fact that the inhibitor remaining after use does not cause pollution.

Claims (3)

[Claims] An anti-adhesion agent for preventing the asphalt mixture from adhering to a compaction means or the like when the asphalt mixture is heated on a road or the like to perform pavement by rolling. Sodium sulfate 15% (± 5%) and sodium alkyl ether sulfate 20% (± 5%)
And 55% (± 5%) of water and 9.95% (± 5%) of coconut oil. 2. An anti-adhesion agent for preventing the asphalt mixture from adhering to a rolling means or the like when the asphalt mixture is heated on a road or the like and rolled to form a pavement. Sodium sulfate 15% (± 5%) and sodium alkyl ether sulfate 20% (± 5%)
And 55% (± 5%) of water and 9.95% (± 5%) of coconut oil are mixed with water to make a dilution of 1: 3 by adding water. To prevent adhesion of heated asphalt mixture. 3. The adhesion preventive agent for a heated asphalt mixture according to claim 2, wherein pure water is preferably used as the water for dilution.