KR980009186A - PACKAGING MATERIAL FOR ATHLETIC PLANT FOR ROAD SERVICE - Google Patents

Abstract

The present invention relates to a room temperature asphalt pavement material for road maintenance that can be applied at room temperature and a method of manufacturing the same. More specifically, the present invention relates to a method for manufacturing a pavement material for asphalt pavement and cement concrete pavement, Thermal asphalt bituminous mixtures, i.e., materials containing room temperature ascones, and a process for producing the same.

The room temperature asbestos packing material of the present invention is characterized by comprising 60 to 92 wt% of straight asphalt, 8.5 to 26.5 wt% of polyurethane polymer, 0.2 to 2.2 wt% of SBS-containing asphalt modifier, and 0.1 to 5.0 wt% of fiber waste sludge And an asphalt pavement material for road repair that can be installed at room temperature.

Description

Packing materials for asphalt at room temperature and its remanufacturing method

FIG. 1 is a graph showing the change of Marshall stability according to the amount of asphalt mixture.

FIG. 2 is a graph showing changes in residual stability (water resistance test) according to soaking time.

FIG. 3 is a graph showing the change of Marshall stability (durability test) according to the elapsed days after demolding of the specimen.

More particularly, the present invention relates to an asphalt pavement and a method of manufacturing the same. More specifically, the present invention relates to an asphalt pavement road and cement concrete pavement It is a modified asphalt concrete mixture developed for simple and economical installation and repair in case of repairing the base layer and surface layer damage of the road. The present invention relates to a non-heatable asphalt bituminous mixture and a method for producing the same. Packaged roads must be repaired in a timely manner after partial repair (repair of sofas, etc.) due to frequent passage of vehicles and changes in weather and environment, And the repatriation must be carried out in the end, resulting in a huge economic loss. It is very important to select the appropriate maintenance period and maintenance method during the life cycle of the package, because the packed roads can have different life cycles depending on how they are maintained.

In recent years, domestic road conditions have been rapidly increasing due to the rapid increase in the number of vehicles and the increase in the passage of oversized vehicles and overloaded vehicles of 30 tons or more.

The bituminous mixture used in the road maintenance in the past is a heating type asphalt concrete mixture suitable for bituminous packing mixture according to the KS F 2349 method when subjected to processes such as heating, mixing and heating, and this mixture contains crushed stone, gravel, Was heated and dried at a high temperature of 170 to 180 占 폚, and then a straight amount of the asphalt heated to 140 占 폚 to 150 占 폚 was added to the dried product as a binder, and these were mixed at a high temperature.

However, the hot bituminous mixture prepared by this method has a problem in that the viscosity of the binder increases rapidly as the temperature is lowered due to the characteristics of the asphalt, so that it is difficult to carry out the installation and maintenance work. In order to prevent this, the bituminous mixture is required to be packed within a limited time while maintaining the temperature at 130 to 140 캜. In addition, it is difficult to transport the bituminous mixture over a long distance, and material separation may occur during construction in winter. It is disadvantageous in that it has a large economic loss as compared with a room temperature construction method.

In order to solve various problems caused when the above-mentioned heated bituminous mixture is used for road maintenance, the following process for producing an ascon was proposed.

Japanese Patent Publication No. 81-40172 discloses a method wherein the converter slag and the aggregate are preliminarily wetted with water-soluble carbonate or water-soluble sulfate aqueous solution at 5 to 20 ° C in an amount of 0.3 to 10% by weight and then pretreated by adding 2 to 5% By weight based on the ratio of the aggregate to the amount of the cut back asphalt mixture obtained by adding 10 to 50% by volume of the organic feedstock to the slag asphalt, and then adding 0.5 to 10% Ascon is presented. However, the room temperature ascon composition prepared by this method is disadvantageous in that it exhibits excellent initial strength and durability but has insufficient long-term storage properties.

Japanese Examined Patent Publication No. 90-84465 discloses an asphalt mixture comprising 100 parts by weight of straight asphalt having an invasion degree of 40-100 and calcium carbonate or magnesium carbonate aggregate having a particle size of 1 to 10 mm at a weight ratio of asphalt of 5 to 6 times, And the mixture is cooled to 100 DEG C or lower and then mixed with 1 to 100 parts of kerosene. However, such an ascon is not limited to a vehicle There is a problem in that the repair material is buried in the wheel and the soles of the vehicle when the vehicle passes through the vehicle and it is separated from the wheel and the soles of the vehicle so that water is sprayed separately or the sand and the stone are sprayed.

Korean Patent Publication No. 93-23422 discloses an asphalt curing agent comprising 3.5 to 5.5 wt% of straight asphalt, 0.1 to 0.4 wt% of diesel oil and 0.2 to 2.2 wt% of a polymer curing agent, and then crushed stone and / Stirring, and mixing. However, since the flash point of the polymer hardener used in the production of the ascon is very low to 54.4 ° C, there is a risk of fire during the mixing operation, the value of the polymer hardener is high, , The storage stability of the polymer hardener is decreased when the polymer hardener is added in an excessive amount, and there are disadvantages such as cracking and crumbling after installation.

In the Ascon production process shown in Korean Unexamined Patent Publication No. 95-6735, 23 to 30% of cut back asphalt, 51 to 62% of road tar for tar and 11 to 14% of acrylic modified butadiene polymer. Mixture of potassium chloride and ammonium chloride 4 ~ 5% 4.7 ~ 7.6%. 89.4 to 93.3% of crushed stone aggregate and 2 to 3% of Portland cement are mixed at room temperature. However, in this process step, the aggregate absorption rate should be controlled to 0.02% or less when using cement as a raw material, Depending on the atmospheric environment, especially the effect of moisture, during mixing. Since the quality of manufactured products can be greatly changed, quality control according to manufacturing facilities is difficult.

Accordingly, it is an object of the present invention to develop an asbestos packaging material capable of laying a cold-mixed asphalt concrete at room temperature (from -20 ° C to 40 ° C) at room temperature while solving the drawbacks of these prior arts The present invention also relates to a method for manufacturing a room temperature ascon, which is capable of repairing and installing suitable roads at any place at any place in four seasons, which is excellent in fluidity even if stored for at least one year, The purpose.

In addition, the object of the present invention is to produce a room temperature ascon which can be rapidly installed even in bad weather and can open traffic immediately after construction, and more recently, it is possible to use harmful substances such as soot, dust, And to develop asbestos packaging materials that do not adversely affect air pollution.

In the present invention, the term " normal temperature ascon "refers to a material that can be packed or stored at room temperature at a room temperature without mixing unheated aggregate and emulsified asphalt or cutback asphalt.

The present invention relates to an asphalt pavement material or a room temperature asbestos pavement material prepared by mixing fiber sludge generated in the production of chemical fibers with straight asphalt, and then mixing the polyurethane based polymer and the asphalt modifier.

The room temperature asbestos packing material of the present invention comprises 60 to 92 wt% of straight asphalt, 8.5 to 26.5 wt% of polyurethane polymer, 0.2 to 2.2 wt% of SBS-containing asphalt modifier, and 0.1 to 5.0 wt% of fiber sludge.

The fiber pulp sludge used in the present invention is a waste sludge generated during the production of chemical fibers such as polyester fibers, and an enormous amount thereof has been produced for years, but it has been difficult to dispose of the waste sludge. Therefore, the fiber sludge, which is one of the constituents of the asbestos packing material of the present invention, can prevent environmental pollution by recycling such waste resources.

Straight asphalt is produced by distillation of residual oil extracted by distillation of crude oil after reheat treatment at above 400 ℃. Straight asphalt produced by such a process is suitable for road pavement. In particular, for the purpose of increasing initial strength and adhesive strength, it is mixed with fiber pave sludge. In order to achieve such mixing, the penetration degree of the asphalt is preferably 80 to 100. The polyurethane-based polymer compound reacts with moisture in air to form a rigid polymer structure. The prior art asphalt concrete admixture has been controlled by the dilution concentration of the emulsion at the dilution concentration of the emulsion so as to have the unhardened property even after storage at room temperature for a long period of time. However, in the case of asphalt hardening, This type of mixture is too soft at the beginning of the laying, which results in a lack of stability at the initial stage of the packaging as well as a problem of poor durability. The present invention can eliminate the use of components such as gasoline and kerosine such as evaporation solvents and water which have been problematic in the prior art by incorporating the polyurethane-based polymer compound into the asbestos packaging material of the present invention, thereby greatly improving the stability and durability There is a number. The polyurethane-based polymer compound used in the present invention is composed of a diisocyanate and a polyol.

The method for producing a room temperature asbestos packing material of the present invention comprises mixing 60 to 92% by weight of asphalt having an invasion degree of 80 to 100 with 0.1 to 5.0% by weight of fiber waste sludge, adding 8.5 to 26.5% by weight of a polyurethane- And 0.2 to 2.2% by weight of an SBS copolymer modifier at room temperature.

The composition of the room temperature asbestos packing material of the present invention composed of these components can be designed according to the application to be applied, and its technical composition is as follows.

The aggregate can be classified into a granular form and a granular form so that it can be constructed in an appropriate manner depending on the packaging site requiring repair. Particle size is a mixture of coarse aggregate, fine aggregate and filler, and is shown in Table 1 below.

Table 1. Particle size of the aggregate used in the mixing of the ordinary-temperature ascon mixture for road repair of the present invention

The coarse aggregate and fine aggregate used here are in conformity with KS F 2357 grade coarse aggregate quality standard for KS F 2357 and KS F 2358 fine aggregate quality material for bituminous mixture and filler material is also suitable for KS F 3501 packing filler quality standard. The dryness of the aggregate is used within the range satisfying the condition of the aggregate.

A cold-mixed asphalt concrete mix was prepared by adding 4.5 to 7.0 wt% of the hot-air mixture of the present invention to the aggregate of Table 1.

Tests for the stability and durability effects of such a room temperature asphalt concrete mixture were conducted using a Marshall stability tester according to the Marshall mix design method of the American Asphalt Institute (AI), and the AI quality standards are shown in Table 2 below.

Table 2. AI Quality Standards

Next, examples of the room-temperature asbestos packing material of the present invention having excellent stability and durability are as follows.

[Example 1]

At an ambient temperature, 8.5 to 26.5% by weight of a polyurethane polymer and 0.1 to 5.0% by weight of polyester as fiber sludge were first mixed to prepare an asphalt mixture, and then 60 to 92% by weight of straight asphalt and 0.2 to 2.2% by weight of an SBS asphalt modifier %, And then the asphalt mixture prepared above is mixed to prepare an asphalt mixture.

Finally, 4.5 to 7.0 wt% of the asphalt mixture prepared as described above was mixed with aggregate and filler aggregates having the aggregate particle sizes listed in Table 1, and the mixture was subjected to a normal temperature asphalt concrete mixture. The results of the Marshall test are shown in Table 3.

The asphalt pavement and the cement concrete pavement prepared by the above method were poured into the pavement without any additional treatment on the roadside of the asphalt pavement and the cement concrete pavement, and then compacted into a compact compactor. After 2 hours, Indicating that stabilization has already been achieved.

In addition, in order to evaluate the stability by the rapid braking of the vehicle, a 1.4-ton vehicle running at 40 km / h immediately after opening the traffic was suddenly braked on the construction site. As a result, the maintenance, peeling, peeling, The cumulative compaction effect caused by the passage increases the stability.

Table 3. Marshall Test Results

As can be seen from the sample Nos. 1 to 4 of Table 3, the Marshall stability value was more than twice as high as the reference value in Table 2 when the asphalt mixture amount was 8.5 to 22.0% at room temperature. However, when the amount of asphalt mixture was less than 8.5%, the flowability was insufficient and storage and workability became difficult and it was difficult to apply it to the production process.

Also, when the asphalt mixture amount of Sample No. 5 was 26.5%, the Marshall stability value was significantly improved than the standard value of Table 2, and the flowability was excellent, the workability was much improved, and the storage property was improved to such a degree as to manage for more than one year.

However, when the amount of asphalt admixture exceeds 26.5%, the initial strength intensity tends to decrease.

[Example 2]

The water resistance of the asphalt concrete at room temperature was tested.

The test method was the same as in Example 1, except that the Marshall stability specimen prepared at room temperature was immersed in water at 25 ° C for 30 minutes, immersed in the same condition for 24 hours, immersed in the same condition for 48 hours, and the Marshall stability was measured. Residual stability was determined by the acid method and the durability by water was confirmed. The results are shown in Table 4.

Here, sample specimens No. 2 and No. 4, which were evaluated as having good Mylar stability value and good workability in Example 1, were subjected to selection tests.

Table 4. Results of water-repellent residual stability test (water resistance test)

As can be seen from the results shown in Table 4 above, when immersed for 30 minutes at room temperature, the residual stability exceeded 90% or more in all conditions, and even when immersed for 48 hours, the AI Marshall design standard value of 75% It was evaluated as a result of completely eliminating the water resistance which is a problem in conventional asphalt concrete mixture at room temperature.

[Example 3]

At room temperature, the formal bituminous mixture is a type that gradually hardens with increasing volatile matter. Therefore, after the demolding, the specimen is allowed to stand at room temperature and the stability change by the elapsed days is measured. The specimen was fabricated in the same manner as in Example 2, and the waiting time was divided into 2 hours, 24 hours, 7 days, 14 days and 30 days after the first demolding. The results are shown in Table 5.

Table 5. Marshall stability test results according to the elapsed days

As in the above examples, Marshall stability was increased with increasing curing time, and Marshall stability was apparently improved to above 1000 kgf after 3 weeks or more. This means that stabilization can be expected to be much higher if cumulative compaction is carried out by vehicle traffic after installation and compaction. Therefore, it has been proved that the room temperature ascon packing material of the present invention can remarkably improve the stability, durability and water resistance which are pointed out as problems of the conventional bituminous mixture at room temperature.

Claims (1)

1. A method for producing an asphalt composition, comprising the steps of: 60 to 92 wt% of straight asphalt; 8.5 to 26.5 wt% of a polyurethane polymer; 0.2 to 2.2 wt% of an asphalt modifier containing SBS; and 0.1 to 5.0 wt% Possible asphalt pavement materials for road repair. 2. The method of claim 1, Wherein the polyurethane based polymer compound is selected from the group consisting of diisocyanate and polyol. 3. The asbestos packing material according to claim 1, wherein the polyurethane-based polymer, the SBS-based asphalt modifier and the fiber closed purging are mixed or partially mixed with the straight asphalt without heating. 4. An asphalt concrete admixture as claimed in claim 1, which is mixed at room temperature and contains 4.5 to 7.0% by weight of an aggregate selected from natural or artificial stone, gravel, sand, stone, steel dust and slag . ※ Note: It is disclosed by the contents of the first application.