KR102580086B1 - Modified asphalt composition, preparation method thereof and mastic mixture - Google Patents

Abstract

The present invention relates to a modified asphalt composition, a method for producing the same, and a mastic mixture. The modified asphalt composition according to the present invention contains 5 to 20 weight ratio of rubber powder and 70 to 95 weight ratio of straight asphalt to change the physical properties of the mastic mixture. can be minimized, has waterproof properties, and has the effect of minimizing cracks by preventing aging that occurs during production and construction.

Description

Modified asphalt composition, preparation method thereof and mastic mixture}

The present invention relates to modified asphalt compositions, methods for their production, and mastic mixtures.

Patent Document 001 is a heat-regenerated asphalt composition, and for road paving, 100 parts by weight of an aggregate mixture consisting of 25 to 90% by weight of waste asphalt recycled aggregate, 5 to 70% by weight of new aggregate, and 1 to 6% by weight of filler, straight asphalt. In the reclaimed asphalt composition comprising 2 to 8 parts by weight and 0.3 to 3 parts by weight of a modified asphalt mixture, the modified asphalt mixture includes SBS, a rubber-based polymer modifier, waste tire rubber powder passed through an 80 mesh sieve, and PEWAX and recycled It consists of additives, and the mixing ratio of the straight asphalt and the modified asphalt mixture is 85 to 93% by weight of straight asphalt, 2 to 5% by weight of SBS, a rubber-based polymer modifier, and the modified asphalt mixture passed through an 80 mesh sieve. It is made by mixing 2 to 10% by weight of waste tire rubber powder, 0.2 to 2% by weight of PE-WAX, and 0.1 to 3% by weight of a reclaimed additive, and mixing the reclaimed asphalt composition with a mixer at 150°C to 200°C. is 10 to 90% by weight of antioxidant phenyl-β-naphthylamine, aromatic amines or hydroquinone, and 2-ethylhexanoic acid and 3-(2-ethylhexanoyloxy)-2,2-dimethel, which are film forming agents. A mixture of propyl ester, benzoic acid, 3-(2-ethylhexanoyloxy)2,2-dimethylpropyl ester, benzoic acid, and 3-benzoyloxy-2,2-dimethylpropyl ester is composed of 10 to 90% by weight, When the content of recycled aggregate in the aggregate mix exceeds 30% by weight, the modified asphalt mixture further contains 0.21 to 10% by weight of a high-sulfur additive to restore the penetration of the waste asphalt, and the recycled aggregate is waste asphalt. It is an aggregate recovered from , does not contain fine fragments and soil dust, has a wear rate of less than 30%, and has a particle size distribution of 0.08 to 40 mm, and the new aggregate does not contain fine fragments and earth dust, and has a wear rate of 30%. As an aggregate, it has a particle size distribution of 0.08 to 40 mm. The new aggregate used for the surface layer is an aggregate adjusted to have a maximum particle diameter of 20 mm, and the SBS (Styrene Butadiene Styrene) has a weight average molecular weight of 50,000 to 100,000. A heat-regenerated asphalt composition consisting of a mixture of three types with weight average molecular weights of 150,000 to 200,000 and 300,000 to 350,000 is disclosed.

Patent Document 002 is a low-carbon, medium-temperature asphalt additive, and is an additive for low-carbon, warm mix asphalt (WMA), characterized in that it contains an amine derived from ethylene oxide or propylene oxide as a surfactant. Asphalt additives are being disclosed.

Patent Document 003 is a block copolymer composition, a method for producing the same, and an asphalt composition containing the same, and includes a first block (1B) containing a repeating unit derived from a styrene monomer, and a second block (2B) containing a repeating unit derived from a conjugated diene monomer. ), a third block (3B) containing a repeating unit derived from a monomer represented by the following formula (1), and a linking group derived from a coupling agent, and the total content of the first block (1B) and the second block (2B) is 100 parts by weight A block copolymer composition comprising a block copolymer having an amount of the third block (3B) of more than 0.5 parts by weight and less than 2 parts by weight is disclosed.

Patent Document 004 is a composite waterproofing method in which a protective material-integrated rubberized asphalt waterproofing sheet and a discarded release film are attached and recycled to the back of a protective material-integrated rubberized asphalt waterproofing sheet, and a PE sheet formed of polyester (PE) long fibers. The fiber nonwoven fabric (10) and the rubberized asphalt (20) heated to 120°C to 140°C are integrally anchored and bonded to each other to manufacture a protective material-integrated rubberized asphalt waterproofing sheet with a uniform thickness. 20) consists of 55 to 75 parts by weight of asphalt, 8 to 15 parts by weight of styrene butadiene styrene synthetic rubber, 4 to 20 parts by weight of process oil, 3 to 10 parts by weight of thermoplastic resin, and 10 to 30 parts by weight of inorganic filler. The PE long fiber nonwoven fabric (10) has a thickness of 0.57 to 0.60 mm, a weight of 200 to 270 g/m2, a tensile strength of 35 to 94 kgf/5 cm in the MD direction and 18 to 39 kgf/5 cm in the CD direction, and a tensile strength of 18 to 39 kgf/5 cm in the MD direction. A protective material-integrated rubberized asphalt waterproofing sheet is disclosed, which is characterized by an elongation of 48 to 58% in the CD direction and 35 to 39% in the CD direction.

KR 10-1015134 (announcement date 2011.02.16) KR 10-2013-0037738 (publication date 2013.04.17) KR 10-2019-0058022 (Publication date 2019.05.29) KR 10-1153559 (announcement date 2012.06.11)

The present invention relates to modified asphalt compositions, methods for their production, and mastic mixtures.

This invention relates to a modified asphalt composition to solve the problems of the prior art, and includes rubber powder at a weight ratio of 5 to 20 and straight asphalt at a weight ratio of 70 to 95.

This invention relates to a modified asphalt composition to solve the problems of the prior art, and includes SBS (styrene butadiene styrene), EVA (ethylene vinyl acetate), SIS (styrene-isoprene-styrene), SEBS (styrene-ethylene/butylene-styrene), and It contains an additive containing one or more selected from SEPS (styrene-ethylene/propylene-styrene).

This invention relates to a modified asphalt composition to solve the problems of the prior art, and the additive is contained in a weight ratio of 10 or less.

This invention relates to a modified asphalt composition to solve the problems of the prior art. The rubber powder is wet and contains a vulcanization additive in a weight ratio of 2 to 8 based on the weight of the rubber powder.

This invention relates to a modified asphalt composition to solve the problems of the prior art, and the rubber powder is dry and undergoes a desulfurization process.

This invention relates to a modified asphalt composition to solve the problems of the prior art, and the rubber powder has a mesh size of 80 to 120.

This invention relates to a modified asphalt composition to solve the problems of the prior art, and the rubber powder contains a flow agent in a weight ratio of 0.3 to 0.7 based on the total weight.

This invention relates to a modified asphalt composition to solve the problems of the prior art, and the rubber powder includes polymer at a weight ratio of 52 to 56, natural rubber at a weight ratio of 38 to 42, and ash at a weight ratio of 5 to 6.

This invention relates to a modified asphalt composition to solve the problems of the prior art, and includes semi-crystalline polyoctenamer or bestenamer at a weight ratio of 4 to 5 compared to the rubber powder.

The invention relates to a method for manufacturing a modified asphalt composition to solve the problems of the prior art, a) adding straight asphalt, rubber powder, and semi-crystalline polyoctenamer or bestenamer to a mixing device and grinding and mixing at high speed for a predetermined time. and b) after step a) is performed, adding a vulcanizing additive to the mixing device and mixing for a predetermined time.

This invention relates to a method of manufacturing a modified asphalt composition to solve the problems of the prior art. In step a), the rotation speed of the mixing device is 2000 rpm or more, and the mixing temperature is 170 to 190 degrees Celsius.

This invention relates to a method of manufacturing a modified asphalt composition to solve the problems of the prior art, where step a) is performed within 5 hours, and step b) is performed within 3 hours.

The invention relates to a method for producing a modified asphalt composition to solve the problems of the prior art. In step a), at least one additive selected from SBS, EVA, SIS, SEPS, and SEBS is further added to the mixing device.

This invention relates to a method of manufacturing a modified asphalt composition to solve the problems of the prior art, and in step b), the rotation speed of the mixing device is 300 rpm or less.

A mastic mixture to solve the problems of the prior art, and includes a modified asphalt composition, aggregate including coarse aggregate and fine aggregate, and filler.

As a mastic mixture to solve the problems of the prior art, the modified asphalt composition has a weight ratio of 7 to 12, the aggregate has a weight ratio of 70 to 75, and the filler has a weight ratio of 8 to 13.

As a mastic mixture to solve the problems of the prior art, the filler includes particles having a diameter of 0.075 mm or less, and when the volume of the modified asphalt composition is 1, the volume of the filler is 2 or more.

A mastic mixture to solve the problems of the prior art. The maximum size of the aggregate is any of 10 mm, 8 mm, and 5 mm, and the packaging thickness of the mastic mixture is 4 cm or 8 mm when the maximum size of the aggregate is 10 mm. When it is 3cm, when it is 5mm it is 2cm.

A mastic mixture to solve the problems of the prior art. The maximum size of the aggregate is any one of 10 mm, 8 mm, and 5 mm, and the weight ratio of the modified asphalt composition is 7 to 9 when the maximum size of the aggregate is 10 mm. When it is 8mm, it is 8~10, and when it is 5mm, it is 9~11.

The modified asphalt composition, its manufacturing method, and mastic mixture according to the present invention can minimize changes in the physical properties of the mastic mixture, provide waterproof properties, and prevent aging that occurs during production and construction, resulting in cracks. It has the effect of minimizing.

1 is a flowchart of a method for producing a modified asphalt composition according to an embodiment of the present invention,
Figure 2 is a flowchart of a method for producing a modified asphalt composition according to another embodiment of the present invention;
Figure 3 is a graph of the synthetic particle size of mastic 10mm aggregate,
Figure 4 is a graph of the synthetic particle size of mastic 8mm aggregate,
Figure 5 is a graph of the synthetic particle size of mastic 5mm aggregate,
Figure 6 is a table of mastic mixture aggregate composite particle sizes;
Figure 7 shows the mastic mixture mixing ratio.

Hereinafter, the most preferred embodiments of the present invention will be described in detail in order to enable those skilled in the art to easily practice the present invention.

Numbers cited in the examples below are not limited to the objects of citation and can be applied to all examples. An object that has the same purpose and effect as the configuration presented in the examples is an equivalent replacement object. The high-level concept presented in the examples includes low-level concept objects that are not described.

[Modified asphalt composition]

(Example 1-1) The present invention relates to a modified asphalt composition containing modified asphalt, and includes 5 to 20 weight ratio of rubber powder and 70 to 95 weight ratio of straight asphalt.

The above-mentioned rubber powder is a rubber particle powder obtained through a milling process of industrial tires (trucks, passenger cars, etc.) at extremely low temperatures. Straight asphalt is a type of petroleum asphalt and is a residue created when crude oil is distilled under reduced pressure. It has the characteristics of high elongation and adhesion. It is mainly used for road paving and airport paving, and its service life is usually considered to be about 10 years.

Among the rubber particle powder and straight asphalt included in the present invention, the rubber particle powder can reduce the aging of asphalt manufactured with the modified asphalt composition according to the present invention and minimize the change in physical properties of the mastic mixture containing the modified asphalt composition. In addition, it has the effect of preventing aging that occurs during production and construction as a waterproofing material, suppressing the increase in asphaltene, and minimizing the occurrence of cracks due to the brittle characteristics of the modified asphalt binder.

In this example, the straight asphalt may be PG64-22 or PG64-16.

(Example 1-2) The present invention relates to a modified asphalt composition containing modified asphalt, and in (Example 1-1), SBS (styrene butadiene styrene), EVA (ethylene vinyl acetate), and SIS (styrene- It contains an additive containing one or more selected from isoprene-styrene), SEBS (styrene-ethylene/butylene-styrene), and SEPS (styrene-ethylene/propylene-styrene).

Additives refer to substances added for various purposes when manufacturing asphalt. In the present invention, the additive is for modification, and can secure the adhesion performance of the aggregate and asphalt binder, which will be described later, and ensure the waterproof performance of the modified asphalt composition according to this embodiment and the mastic mixture made thereby. .

(Example 1-3) The present invention relates to a modified asphalt composition containing modified asphalt, and in (Example 1-2), the additive is contained in a weight ratio of 10 or less.

Here, the weight ratio of the additive of 10 means that the total weight of the modified asphalt composition is 100 or less.

(Example 2-1) The present invention relates to a modified asphalt composition containing modified asphalt. In (Example 1-1), the rubber powder is wet, and the weight ratio of 2 to 8 is based on the weight of the rubber powder. Contains vulcanizing additives.

In the case of rubber powder, it is provided in a desulfurized state through a specific process during the manufacturing process, so vulcanization additives are not required when added in dry form. However, when the rubber powder is provided in a wet form, a vulcanizing additive is absolutely necessary and serves to prevent the straight asphalt and the rubber powder from phase separating from each other. As the addition ratio of the vulcanizing additive increases, the elasticity of the modified asphalt composition containing the vulcanizing additive increases, which has the effect of improving high temperature and waterproof properties. In addition, the vulcanization additive not only prevents the straight asphalt and the rubber powder from phase separating from each other, but also prevents phase separation from the additive when the additives mentioned in (Example 1-2) and (Example 1-3) are included together. There is an effect such as: At this time, types of additives that prevent phase separation may include SBS, EVA, SIS, SEPS, SEBS, etc. The vulcanization additive may be included in a weight ratio of 2 to 8 when the total weight of the rubber powder included in the present invention is 100, and it should be noted that this is not a weight ratio relative to the entire modified asphalt composition.

(Example 3-1) The present invention relates to a modified asphalt composition containing modified asphalt, and in (Example 1-1), the rubber powder is dry and undergoes a desulfurization process.

However, as explained earlier, if the rubber powder is dry, a separate vulcanization additive may not be necessary.

(Example 4-1) The present invention relates to a modified asphalt composition containing modified asphalt, and in (Example 1-1), the rubber powder has a mesh size of 80 to 120 and is 0.3 to 0.3 to the total weight. Contains a flow agent at a weight ratio of 0.7.

Here, 80 to 120 mesh refers to the size of the rubber powder included in the rubber powder and the number of graduations included within 1 inch of a square. When converted to other units, when the rubber powder is 80 mesh, the diameter of a single rubber powder may be 180 micrometers, and when the rubber powder is 120 mesh, it may be 125 micrometers. That is, the rubber powder of this embodiment may have a diameter of 125 to 180 micrometers.

Rubber powder may not simply consist of rubber powder alone, and a flow agent may be added to add properties to such rubber powder. Here, silicon oxide (SiO2) may be used as a type of flow agent.

(Example 5-1) The present invention relates to a modified asphalt composition containing modified asphalt, and in (Example 1-1), the rubber powder is composed of polymer at a weight ratio of 52 to 56 and natural at a weight ratio of 38 to 42. It contains rubber and ash in a weight ratio of 5 to 6.

Here, ash is a type of mineral filler and may be a powder of a mineral substance.

(Example 5-2) The present invention relates to a modified asphalt composition containing modified asphalt, and in (Example 5-1), semi-crystalline polyoctenamer or bath at a weight ratio of 4 to 5 compared to the rubber powder Contains Tenamer.

The semi-crystalline polyoctenamer or bestenamer described above is intended to improve the adhesion between the asphalt binder and rubber powder. Through semi-crystalline polyoctenamer or bestenamer, rubber powder can exhibit the same properties as synthetic rubber. However, semi-crystalline polyoctenamer or bestenamer may be included in rubber powder in wet form.

[Method for producing modified asphalt composition]

(Example 1-1) The present invention relates to a method for producing a modified asphalt composition, a) adding straight asphalt, rubber powder, and semi-crystalline polyoctenamer or bestenamer to a mixing device and mixing at high speed for a predetermined time. and b) after step a) is performed, adding a vulcanizing additive to the mixing device and mixing for a predetermined time, wherein the rotation speed of the mixing device in step a) is 2000 rpm or more, and the mixing temperature is 170 to 190 degrees Celsius, step a) can be performed within 5 hours, and step b) can be performed within 3 hours.

The method for producing the modified asphalt composition according to this embodiment described above is a method for producing the modified asphalt composition described above. Therefore, materials or compositions with the same name as the modified asphalt composition described above are considered the same.

In step a) above, the straight asphalt may be PG64-22 or PG64-16 as previously described. The mixing device used in step a) may be a device that mixes two or more materials together. For example, the mixing device may include a type of passage constituting a mixing space and a mixing member that rotates inside the container. The mixing member may be a type of blade, and may have a plurality of blades connected to a planetary gear to rotate and revolve. That is, the rotational speed adjusted in step a) may be the speed of the mixing member rotating inside the mixing device. The mixing device may include a temperature controller capable of controlling the temperature inside the mixing space.

In this example, step a) is described as being performed at 170 to 190 degrees Celsius, and may preferably be performed before/after 180 degrees Celsius.

The reason for mixing the vulcanization additive in step b) is to prevent separation of the straight asphalt, rubber powder, and semi-crystalline polyoctenamer or bestenamer added in step a).

Steps a) and b) described above may be automatically adjusted by a control device that controls the mixing device, or may be performed manually by the user.

(Example 1-2) The present invention relates to a method for producing a modified asphalt composition, and in (Example 1-1), in step a), one of SBS, EVA, SIS, SEPS, and SEBS is added to the mixing device. Add at least one more additive.

That is, in the present invention, the additive may be any one of SBS, EVA, SIS, SEPS, and SEBS, or a combination of two or more. As described above, the weight ratio of the additive may be added as much as 10 weight ratio of the finally manufactured modified asphalt composition.

(Example 1-3) The present invention relates to a method for producing a modified asphalt composition, and in (Example 1-1), the rotation speed of the mixing device in step b) is 300 rpm or less.

[Mastic mixture]

(Example 1-1) The present invention relates to a mastic mixture, and includes a modified asphalt composition, aggregate containing coarse aggregate and fine aggregate, and filler, the modified asphalt composition has a weight ratio of 7 to 12, and the aggregate has a weight ratio of 70 The weight ratio is ~75, and the filler is at a weight ratio of 8 to 13.

In this example, there can be three types of aggregate particle size, and coarse aggregate was added to reinforce permanent performance compared to Guss asphalt used as a waterproofing layer. In addition, in order to demonstrate waterproofing properties by securing a porosity of 1% or less in the mastic mixture, the aggregate content of 4.75 mm or less was increased compared to the existing SMA (Stone Mastic Asphalt). In particular, for masticating the asphalt mixture, the content of aggregates smaller than 4.75 mm was increased by more than 15%. As the surface area of the aggregate increases, the asphalt content increases and the porosity is less than 1%, making it similar to a rubber mat. It can be manufactured in any form.

(Example 1-2) The present invention relates to a mastic mixture, and in (Example 1-1), the filler includes particles having a diameter of 0.075 mm or less, and the volume of the modified asphalt composition is When it is 1, the volume of the filler is 2 or more.

In order to reduce voids that may occur inside the mastic mixture, the filler content can be increased to 0.075 mm or less to make it void-free (voids less than 1%). At this time, the volume ratio between the filler and the modified asphalt composition is the volume of the filler. When is greater than 2, internal voids can be reduced to less than 1%.

(Example 1-3) The present invention relates to a mastic mixture. In (Example 1-1), the maximum size of the aggregate is any one of 10 mm, 8 mm, and 5 mm, and the packaging thickness of the mastic mixture is is 4 cm when the maximum size of the aggregate is 10 mm, 3 cm when it is 8 mm, and 2 cm when it is 5 mm.

The mastic mixture according to the present invention can be used for bridge surface pavement and concrete pavement overlay to apply a waterproof layer. At this time, 10mm, 8mm, and 5mm, which are classified as the largest sizes among the aggregates of the mastic mixture, can be divided into applications depending on traffic volume.

(Example 1-4) The present invention relates to a mastic mixture, and in (Example 1-1), the maximum size of the aggregate is any one of 10 mm, 8 mm, and 5 mm, and the weight ratio of the modified asphalt composition is , when the maximum size of the aggregate is 10 mm, it is 7 to 9, when it is 8 mm, it is 8 to 10, and when it is 5 mm, it is 9 to 11.

If the weight ratio of the modified asphalt composition is less than the minimum value in the weight ratio range, it is difficult to secure a void of 1% or less, and if the weight ratio is more than the maximum value in the range, material separation may occur due to the flow of the asphalt binder.

The present invention is not limited to the above-described embodiments, and the scope of application is diverse. Of course, various modifications and implementations are possible without departing from the gist of the present invention as claimed in the claims.

Claims (19)

Contains rubber powder at a weight ratio of 5 to 20 and straight asphalt at a weight ratio of 70 to 95 based on the total weight of the modified asphalt composition,
Styrene butadiene styrene, ethylene vinyl acetate, styrene-isoprene-styrene, styrene-ethylene/butylene-styrene and styrene. - Contains an additive containing one or more selected from ethylene/propylene-styrene,
The rubber powder is wet,
Contains a vulcanizing additive in a weight ratio of 2 to 8 relative to the weight of the rubber powder,
The particle size of the rubber powder is 80 to 120 mesh,
The rubber powder includes a flow agent in a weight ratio of 0.3 to 0.7 based on the total weight, and the flow agent includes silicon oxide (SiO2),
The rubber powder is,
It contains polymer at a weight ratio of 52 to 56, natural rubber at a weight ratio of 38 to 42, and ash at a weight ratio of 5 to 6 relative to the total weight of the rubber powder.
A modified asphalt composition comprising semi-crystalline polyoctenamer at a weight ratio of 4 to 5 compared to the rubber powder.
delete According to paragraph 1,
A modified asphalt composition wherein the additive is contained in a weight ratio of 10 or less based on the total weight of the modified asphalt composition.
delete delete delete delete delete delete a) Adding straight asphalt, rubber powder, and semi-crystalline polyoctenamer or bestenamer to a mixing device and grinding and mixing at high speed for a predetermined time; and
b) after step a) is performed, adding a vulcanizing additive to the mixing device and mixing for a predetermined time,
In step a), the rotation speed of the mixing device is 2000 rpm or more, and the mixing temperature is 170 to 190 degrees Celsius,
Step a) is performed within 5 hours, step b) is performed within 3 hours,
In step a), styrene butadiene styrene, ethylene vinyl acetate, styrene-isoprene-styrene, and styrene-ethylene/butylene-styrene are added to the mixing device. Add at least one additive of styrene-ethylene/butylene-styrene) and styrene-ethylene/propylene-styrene,
In step b), the rotation speed of the mixing device is 300 rpm or less,
The straight asphalt in step a) is PG64-22 or PG64-16,
Step a) includes a mixing device that mixes two or more materials with each other,
The mixing device includes a barrel constituting a mixing space and a mixing member rotating inside the barrel,
The mixing member has a plurality of blades connected to a planetary gear to rotate and revolve,
A method of manufacturing a modified asphalt composition wherein the mixing device includes a temperature control unit capable of controlling the temperature inside the mixing space.
delete delete delete delete A mastic mixture containing the modified asphalt composition of claim 1, aggregate containing coarse aggregate and fine aggregate, and filler.
According to clause 15,
The weight ratio of the modified asphalt composition to the total weight of the mastic mixture is 7 to 12,
A mastic mixture in which the aggregate has a weight ratio of 70 to 75, and the filler has a weight ratio of 8 to 13.
According to clause 15,
The filler includes particles having a diameter of 0.075 mm or less,
When the volume of the modified asphalt composition is 1, the volume of the filler is 2 or more.
According to clause 15,
The maximum size of the aggregate is any of 10 mm, 8 mm, and 5 mm,
The packing thickness of the mastic mixture is,
A mastic mixture whose maximum size is 4cm when the aggregate is 10mm, 3cm when the maximum size is 8mm, and 2cm when the maximum size is 5mm.
delete