KR100845604B1 - The method of a suture tape for asphalt road - Google Patents

Abstract

A method for manufacturing a suture tape for asphalt roads is provided to produce the suture tape that enables repair without expensive equipment and skilled workers and allows vehicular traffic immediately after the repair. A method for manufacturing a suture tape for asphalt roads includes the steps of: (100) heating 100 parts by weight of polymer-modified asphalt to 150-200 °C; (110) adding 6.5-20 parts by weight of cellulose to the heated polymer-modified asphalt, and stirring the admixture for 30 minutes to a hour to produce a stabilized mixture; (120) cooling the mixture to 100-130 °C, and producing a first extrusion; (130) producing a second extrusion having a width of 30-150 mm and a thickness of 2-15 mm from the first extrusion; (140) spraying silica sand or calcium carbonate on the upside of the second extrusion; and (150) attaching an adhesive-coated release paper or vinyl sheet to the underside of the second extrusion.

Description

The method of a suture tape for asphalt road}

1 is a manufacturing flowchart of the asphalt road sealing tape.

Figure 2 is a manufacturing flowchart of another asphalt road seal tape.

Figure 3 is a filling progression of the asphalt road seal tape.

4 is a construction cross-sectional view of the asphalt road sealing tape.

The present invention relates to an asphalt road sealing tape and a method for manufacturing the same, and more particularly, to a asphalt road sealing tape in a solid state, not a liquid water-retaining material comprising a polymer modified asphalt bitumen and cellulose. will be.

Typical pavement consists of asphalt pavement or asphalt concrete mixed with asphalt and concrete. However, roads paved with concrete, asphalt, etc., are cracked due to changes in the physical properties of the surface due to ultraviolet rays, loads on the road vehicles, and aging. These cracks are weak at first, but the progress of the cracks is accelerated by changes in the temperature and precipitation caused by changes in the load and the four seasons of the road vehicle. Therefore, it is important to repair the cracks in a timely manner so that the cracks do not progress further.

Accordingly, pavement cracks or road seals are used for pavement in which epoxy resin or SBS synthetic resin is added to asphalt for the purpose of repairing road cracks and imparting permeability, adhesiveness, water resistance, etc. to cracks.

However, the repair material to which the synthetic resin is added must be used after melting at a high temperature of 180 ~ 200 ℃ at the construction site, it can not be installed without expensive equipment and there is a problem that it is difficult to apply at low temperature (5 ℃ or less).

In addition, the repair material is added synthetic resin has a long drying time after construction there is a problem that the vehicle can not communicate until the repair material is completely dried.

In addition, the asphalt added with the epoxy resin has a problem that it is easily broken and worn by the load of the vehicle passing through itself by the ultraviolet light.

In addition, there is a problem in that conventionally, after the road crack has been considerably progressed, repairing or repairing by cracking the cracked part to repair the filling material in the etched part may not work in the minute cracking step.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a solid asphalt road sealing tape, which is not a liquid repair material.

In addition, to provide an asphalt road seal tape that can be installed without expensive equipment and skilled personnel, and can pass the vehicle immediately after repair.

In addition, the present invention provides an asphalt roadway sealing tape that can be easily repaired even in a fine cracked state as well as the repair of a portion where the crack is considerably advanced.

In addition, it is to provide an asphalt road sealing tape that can be constructed within a wide temperature range due to the elastic properties that change with temperature.

Asphalt road sealing tape of the present invention for achieving the above object is characterized in that it comprises a mixture comprising a polymer modified asphalt bitumen (Bitumen) and cellulose (Cellulose) and a release paper attached to the lower surface of the mixture.

In addition, the upper surface of the mixture is characterized in that it comprises a coating layer sprayed with silica sand or calcium carbonate.

In addition, the mixture is characterized in that it further comprises a polyethylene fibrid.

In addition, the polymer modified asphalt bitumen (Bitumen) is characterized in that made by mixing styrene-butadiene-styrene (SBS) on the asphalt.

In addition, the cellulose (Cellulose) is characterized in that one of the cellulose or cellulose fibers in powder form.

In addition, the powdered cellulose is characterized in that the particles of 2 ~ 3mm in length.

In addition, the mixture is characterized in that it comprises a polymer modified asphalt bitumen 100 parts by weight and cellulose (Cellulose) 6.5 to 20 parts by weight.

In addition, the mixture is characterized in that it comprises 100 parts by weight of polymer modified asphalt bitumen, 6 to 16.3 parts by weight of cellulose (Cellulose) and 4 to 10 parts by weight of polyethylene fibrid.

Meanwhile, heating 100 parts by weight of the polymer-modified asphalt to 150 to 200 ° C .; adding 6.5 to 20 parts by weight of cellulose to the heated polymer-modified asphalt to produce a stabilized mixture while stirring for 30 minutes to 1 hour; Cooling the mixture to 100-130 ° C. and producing a primary extrudate; extracting the primary extrudate into a secondary extrudate having a width of 30-150 mm and a thickness of 2-15 mm; and the secondary extrudate Spraying silica sand or calcium carbonate on the upper surface; and attaching a release paper or a vinyl sheet coated with an adhesive to the lower surface of the second extrudate.

In addition, heating 100 parts by weight of the polymer-modified asphalt to 150 ~ 200 ℃ ;, 6 to 16.3 parts by weight of cellulose and 4 to 10 parts by weight of polyethylene fibrid to the heated polymer-modified asphalt is stabilized while stirring for 30 minutes to 1 hour Producing a mixed mixture; cooling the mixture to 100 to 130 ° C. and producing a primary extrudate; extracting the primary extrudate into a secondary extrudate having a width of 30 to 150 mm and a thickness of 2 to 15 mm. It is characterized in that it is produced, comprising the steps of: spraying silica sand or calcium carbonate on the upper surface of the second extrudate; and attaching a release paper or vinyl sheet coated with an adhesive to the lower surface of the secondary extrudate .

Hereinafter, the present invention will be described with reference to a preferred embodiment of the constituent material of the present invention and the weight parts of the constituent material.

The present invention is characterized in that it comprises a mixture comprising a polymer modified asphalt bitumen and cellulose and a release paper attached to the lower surface of the mixture. The polymer modified asphalt bitumen is styrene-butadiene-styrene (SBS), styrene-butadiene-rubber (SBR), chemcrete, poly-butylene-socyanate (PBS), low density polyethylene (LDPE), waste rubber Its packaging performance and physical properties are improved by adding etc. and it absorbs external shocks and pressures and does not depend greatly on the temperature change. In addition, the elasticity and flexibility are maintained for a long time and the waterproof effect is excellent.

In the present invention, it is preferable to use a polymer-modified asphalt bitumen in which styrene-butadiene-styrene is mixed, because the styrene-butadiene-styrene absorbs more external shock and pressure than other modifiers. In addition, the styrene-butadiene-styrene not only improves the adhesion of the asphalt even at low temperatures but also increases the softening point of the asphalt to prevent deformation at high temperatures.

The chemical structure of cellulose is that D-glucose is multi-polymerized by -l, 4 bonds to form a straight chain. The chemical formula is (C ₆ H ₁₀ O ₅ ) n. Cellulose is the largest molecular weight among polysaccharides, and its molecular weight reaches tens of thousands to hundreds of thousands in its natural state. Cellulose, also known as fibrin, is an organic compound that is present in nature in large quantities after coal and is present in higher plants. In addition to the above-mentioned higher plants, they are also present in the shell of sea urchins, which are marine marine products, and are contained in the extracellular secretion of acetic acid bacteria. Cellulose is a odorless white solid and insoluble in water. It is also very resistant to alkali, insoluble, but hydrolyzed in acid and broken down into glucose. On the other hand, a large amount of cellobiose is produced as a compound immediately before being broken down into glucose. A molecule of cellulose is a polymer formed by dehydrogenation of a large amount of glucose and binding in the form of cellobiose.

    The cellulose used in the present invention is characterized in that it is one of cellulose or cellulose fibers in powder form. When the cellulose particles in the powder form exceed 3 to 4 mm, it takes a long time to be mixed with the polymer-modified asphalt bitumen, and it is preferable to set it to 2 to 3 mm or less because all the particles do not melt during mixing. On the other hand, the cellulose fiber is composed of several cellulose molecules to form a fiber, the minimum unit is a micelle called 0.05nm in diameter, 0.6nm in length or more. Cellulose fibers increase the viscosity, are resistant to chemicals and are not eroded by microorganisms and are used in various chemistries.

    Cooling the polymer-modified asphalt bitumen results in a hard elasticity with less elasticity and no flowability, but mixing cellulose together not only increases the viscosity of the mixture but also increases the elasticity and becomes a solid with very little fluidity after cooling. Due to the fluidity as described above, when the asphalt road sealing tape made of the mixture is constructed, the mixture is gradually filled in the cracked portion.

    In addition, the mixture of the present invention may further add polyethylene fibrid to the polymer-modified asphalt bitumen and cellulose mixture. The polyethylene classifies the crude oil of petroleum and separates the naphtha portion (about 100-200 ° C outflow). It is prepared by decomposing this to fractionate about 25% ethylene and polymerizing this ethylene. Polyethylene fibrids increase the strength, tensile strength, and impact resistance of the polyethylene and have a high tensile strength of 9 g per denier. When the polyethylene fibrid is added to the polymer-modified asphalt bitumen and cellulose mixture, it is possible to increase the strength of the asphalt and reduce plastic deformation in summer.

Hereinafter, a manufacturing method and a test example of the present invention will be described.

Referring to the manufacturing method of the asphalt road sealing tape comprising a mixture containing a polymer modified asphalt bitumen (Bitumen) and cellulose (Cellulose) and a release paper attached to the lower surface of the mixture.

First, 100 parts by weight of SBS polymer-modified asphalt is put into a stirring tank and heated to 150 to 200 ° C. (100). Next, 6.5 to 20 parts by weight of cellulose is added to the heated polymer-modified asphalt to produce a stabilized mixture while stirring for 30 minutes to 1 hour (110), and the resulting mixture is cooled to 100 to 130 ° C. and extruded first. The primary extrudate is drawn off (120). Next, the first extrudate is placed in an extruder and extracted with a second extrudate having a width of 30 to 150 mm and a thickness of 2 to 15 mm (130), and silica sand or calcium carbonate is sprayed onto the upper surface of the second extrudate (140). . In addition, an adhesive coated release paper or a vinyl sheet is attached to the lower surface of the second extrudate (150).

In the present invention prepared as described above, since the polymer modified asphalt bitumen and cellulose are mixed, not only the viscosity of the mixture is increased but also the elasticity is increased, so that the solid has a very low fluidity even after cooling and extrusion. Silica sand or calcium carbonate is sprayed on the upper surface of the second extrudate, in order to prevent the present invention from adhering to the wheel of the driving vehicle. In addition, the lower surface of the second extrudate is attached with a release paper or a vinyl sheet coated with an adhesive so as to easily adhere to the asphalt road.

In the case of general road crack repair material, it is difficult to repair it at the stage of cracking because it is used directly in the field, but the asphalt road seal tape manufactured by the above method is manufactured in a linear and continuous manner by making the thickness and width of the seal tape different. From fine initial cracks (small cracks around 3mm) to advanced cracks (cracks around 20mm) can be repaired. In addition, the present invention is sprayed on the upper surface of the secondary extruding silica sand or calcium carbonate can be prevented from sticking to the wheel of the vehicle even if passing through the vehicle immediately after the attachment to the cracks. In addition, the lower surface of the secondary extrudate is attached to a release paper coated with an adhesive to facilitate the adhesion to the road, it is possible to work in a wide temperature range by removing the release paper and attaching it to the crack. As the asphalt road seal tape attached to the cracks as above is a solid with very little fluidity, when the vehicle passes over the repair site, the construction of the asphalt road seal tape as shown in FIG. The polymer-modified asphalt and cellulose mixture is slowly filled into the cracked portion through the depression (b) of the road sealing tape and the compaction step (c) of the depression. Therefore, there is a feature that the vehicle can pass immediately after attaching the asphalt road sealing tape.

On the other hand, as shown in Fig. 4 (a), if the width of the crack is 10 ~ 12mm or less can be directly attached to the asphalt road sealing tape, if the width of the crack is 12 ~ 14mm or more as shown in Fig. 4 (b). As described above, it is preferable to attach the asphalt road sealing tape after filling the gap with the first extrudate or the second extrudate.

Polymer Modified Asphalt Bitumen and Cellulose Mixing Examples

① Test component table

ingredient Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Comparative Example 3 Polymer modified asphalt bitumen (parts by weight) 100 100 100 100 100 100 100 Cellulose (parts by weight) 20 15 10 6.5 42.8 30 2

② Experimental Example

Classification Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Comparative Example 3 Longitude (cps) 64 65.6 68 76 56 60 84 Compressive strength (kg / ㎠) 402 408 412 430 378 392 452 Flexural strength (kgf / cm) 128 147 160 168 121 126 175 Accelerated weathering test (weight change after 200h) -1.2% -0.5% -0.37% -0.29% -2.78% -1.8% -0.28% Accelerated weathering test (no cracking after 10h) clear clear clear clear clear clear incongruity Absorption Expansion Rate (%) 0.49 0.35 0.24 0.1 0.72 0.6 0.04 Filling degree Good Great Great Great incongruity usually incongruity Heat resistance (100 ± 2 ℃ × 1h) clear clear clear clear clear clear clear Cold resistance (-20 ± 2 ℃ × 1h) clear clear clear clear clear clear clear

As shown in Examples 1 to 4, when the hardness, compressive strength, and bending strength are examined, the hardness, the compressive strength, and the bending strength decrease as the cellulose content increases. As hardness, compressive strength, and flexural strength decrease, the time required for filling the crack and the pressure required for filling decrease, which is advantageous in construction. However, when the cellulose content is more than 30 parts by weight, as in Comparative Examples 1 and 2, the mixture that repairs the cracked portion is turned off due to the low hardness. In addition, when the cellulose content is less than 2 parts by weight as in Comparative Example 3, it takes a long time to be filled in the cracks due to the high hardness, and some unpaved asphalt road sealing tape is left for a long time protruding on the road. Therefore, there is a need to adjust the cellulose content to adjust the hardness, compressive strength, bending strength.

In addition, in Examples 1 to 4 accelerated weather resistance test (weight change after 200 hours), the more the cellulose content, the greater the weight change, and it can be seen that there is no abnormality in all of cracks after 10 hours. In the case of other tests (heat resistance, cold resistance), there is no problem, so the asphalt road sealing tape of the present invention can withstand a wide temperature range.

Absorption expansion test is to determine the stability of moisture when exposed to various climatic conditions. The higher the absorption expansion rate, the more unstable the mixture and the greater the expansion and contraction. The absorption expansion ratios of Examples 1 to 4 were 0.1 to 0.49%, and 0.72% for Comparative Example 1. This is a test indicating that the absorption expansion ratio increases as the cellulose weight part increases. In particular, the absorption expansion ratio of Comparative Example 1 is 0.72%, it can be seen that the fluidity is large even after the mixture is cooled.

The present invention is useful because the mixture is filled in the cracked portion due to such fluidity, but the cellulose part by weight of the absorption expansion ratio of more than 0.5% mixing is filled with the problem that the filling site is submerged when filled in the cracked area needs attention. Therefore, the mixture included in the present invention is preferably adjusted to 6.5 to 20 parts by weight of cellulose relative to 100 parts by weight of the polymer-modified asphalt, to impart strength and at the same time to impart fluidity.

Meanwhile, a method of manufacturing an asphalt road sealing tape including a mixture including a polymer modified asphalt bitumen, cellulose, and polyethylene fibrid, and a release paper attached to the lower surface of the mixture is as follows.

First, 100 parts by weight of polymer-modified asphalt is heated to 150 to 200 ° C (200). Next, 6 to 16.3 parts by weight of cellulose and 4 to 10 parts by weight of polyethylene fibrid are added to the heated polymer-modified asphalt to generate a stabilized mixture while stirring for 30 minutes to 1 hour (210), and the mixture is 100 to 130 ° C. The first extrudate is extracted by cooling with primary and extruded first (220). Next, the first extrudate is placed in an extruder and extracted with a second extrudate having a width of 30 to 150 mm and a thickness of 2 to 15 mm (230), and sprayed with silica sand or calcium carbonate on the upper surface of the second extrudate (240). . In addition, an adhesive coated release paper or a vinyl sheet is attached to the lower surface of the second extrudate (250).

Another embodiment of the present invention prepared as described above is characterized by producing by mixing cellulose and polyethylene fibrid in the polymer modified asphalt bitumen. Mixing polyethylene fibrid as described above can increase the hardness of the asphalt road sealing tape.

Therefore, when the asphalt road sealing tape containing cellulose is added to the polymer-modified asphalt bitumen, the filling of the mixture is facilitated in the cracked portion, and the addition of polyethylene fibrid increases the strength of the filling portion after filling, thereby increasing durability and wear resistance. Can be increased. Polyethylene fibrids can also reduce summer strain.

Asphalt road sealing tape prepared by the above method is easy to install because after cleaning the cracks, the cracks and the center of the lower surface of the tape correspondingly located, and the release paper of the lower surface is removed and attached. In addition, it can be used for road crack repair, road pavement boundary sealing, drainage manhole circumferential bonding and the like.

Polymer Modified Asphalt Bitumen with Cellulose and Polyethylene Fibrid Mixing Examples

① Test component table

ingredient Example 5 Example 6 Example 7 Example 8 Comparative Example 4 Comparative Example 5 Comparative Example 6 Polymer modified asphalt bitumen (parts by weight) 100 100 100 100 100 100 100 Cellulose (parts by weight) 16.3 15 9.4 6 28 30 3 Polyethylene fibrid (parts by weight) 10 8 7 4 13.2 23 5.4

② Experimental Example

Classification Example 5 Example 6 Example 7 Example 8 Comparative Example 4 Comparative Example 5 Comparative Example 6 Longitude (cps) 69 70.4 74 81.5 73 81 84 Compressive strength (kg / ㎠) 436 448 452 460 440 456 479 Flexural strength (kgf / cm) 147 156 162 165 158 162 180 Accelerated weathering test (weight change after 200h) -0.8% -0.34% -0.27% -0.19% -0.78% -0.8% -0.19% Accelerated weathering test (no cracking after 10h) clear clear clear clear clear Cracking clear Absorption Expansion Rate (%) 0.36 0.23 0.19 0.11 0.62 0.56 0.04 Filling degree Great Great Great Good usually incongruity incongruity Heat resistance (100 ± 2 ℃ × 1h) clear clear clear clear clear clear clear Cold resistance (-20 ± 2 ℃ × 1h) clear clear clear clear clear clear clear

The above test results show the change of hardness, cracking and filling degree of the mixture of cellulose and polyethylene fibrid in polymer modified asphalt bitumen. The hardness, compressive strength, and flexural strength were increased, and the weight change after 200 hours was reduced as compared with the experimental example of the high rich modified asphalt bitumen and cellulose mixing example. Thus, it was confirmed that the change in the content of polyethylene fibrids increased the hardness of the asphalt roadway sealing tape.

On the other hand, in the test that observed the presence of cracks after 10 hours, cracks occurred in Comparative Test 2. When the content of polyethylene fibrid is increased, economical efficiency is lowered and cracks are generated. Therefore, the content of polyethylene fibrid is preferably composed of 10 to 12 parts by weight or less relative to 100 parts by weight of modified asphalt bitumen.

In addition, in the test for checking the filling degree, the absorption expansion rate was increased once again as the content of cellulose was increased, and Comparative Example 5 and Comparative Example 6 were suitable for the present invention because it took a long time to fill with high hardness. It was found that the mixing ratio was not.

Therefore, it is preferable to prepare an asphalt road sealing tape with 6 to 16.3 parts by weight of cellulose and 4 to 10 parts by weight of polyethylene fibrids to 100 parts by weight of the modified asphalt bitumen in order to fill the cracks and give strength to the cracks after filling. .

In the foregoing detailed description, optimal embodiments have been disclosed. The terminology specifically used herein is for the purpose of describing the invention only and is not intended to be limiting of meaning or scope of the invention as described in the claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this.

As described above, according to the present invention, there is an advantage of providing an asphalt road sealing tape in a solid state rather than a liquid repair material.

In addition, there is an advantage to provide an asphalt road sealing tape that can be installed without expensive equipment and skilled personnel and can pass the vehicle immediately after repair.

In addition, there is an advantage of providing an asphalt road sealing tape that can be easily repaired even in a fine cracked state as well as repair of a portion where the crack is considerably advanced.

In addition, there is an advantage of providing an asphalt road sealing tape that can be constructed within a wide temperature range due to the elastic properties that change with temperature.

Claims (10)

delete delete delete delete delete delete delete delete Heating 100 parts by weight of the polymer-modified asphalt to 150 to 200 ° C; Adding 6.5 to 20 parts by weight of cellulose to the heated polymer-modified asphalt to produce a stabilized mixture while stirring for 30 minutes to 1 hour; Cooling the mixture to 100-130 ° C. and producing a primary extrudate ;, Extracting the primary extrudate into a secondary extrudate having a width of 30 to 150 mm and a thickness of 2 to 15 mm; Spraying silica sand or calcium carbonate on the upper surface of the second extrudate; and Method for producing an asphalt road sealing tape, characterized in that the manufacturing method comprising the step of attaching the adhesive coated release paper or vinyl sheet on the lower surface of the second extrudate.  Heating 100 parts by weight of the polymer-modified asphalt to 150 to 200 ° C; Adding 6 to 16.3 parts by weight of cellulose and 4 to 10 parts by weight of polyethylene fibrid to the heated polymer-modified asphalt to produce a stabilized mixture while stirring for 30 minutes to 1 hour; Cooling the mixture to 100-130 ° C. and producing a primary extrudate ;, Extracting the primary extrudate into a secondary extrudate having a width of 30 to 150 mm and a thickness of 2 to 15 mm; Spraying silica sand or calcium carbonate on the upper surface of the second extrudate; and Method for producing an asphalt road sealing tape, characterized in that the manufacturing method comprising the step of attaching the adhesive coated release paper or vinyl sheet on the lower surface of the second extrudate.

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