KR101178221B1 - Modifier for warm asphalt, manufacturing method of this and the asphalt mixture with this, manufacturing method of the same - Google Patents

Abstract

PURPOSE: A manufacturing method of warm mix asphalt(wma) additives, a warm mix asphalt(wma) additive, asphalt mixture including the warm mix asphalt(wma) additive, and a manufacturing method thereof are provided to reduce energy consumption in a manufacturing process of asphalt mixture. CONSTITUTION: A warm mix asphalt(wma) additive is composed of a mixture including fatty acid having 6-25 carbons, Ca based catalyst and Zn based catalyst. The warm mix asphalt(wma) additive comprises 30-50 wt% of stearic acid and 50-70 wt% of palmitic acid based on the total weight of the fatty acid. The warm mix asphalt(wma) additive comprises 3-9 wt% of Zn based catalyst and 5-15 wt% of Ca based catalyst based on the total weight of the fatty acid. A manufacturing method of warm mix asphalt(wma) additive comprises the following steps: melting a first fatty acid having 6-25 carbons at 170-190 deg. Celsius and agitating at 100-200 rpm for 2-5 hours after adding the Ca based catalyst and Zn based catalyst; mixing and melting a refined and hydrogenated second fatty acid having 6-25 carbons with the first fatty acid; adding a reformed third fatty acid having 6-25 carbons to the first and second fatty acids and agitating at 100-200 rpm for 1-3 hours; and cooling a mixture including the first, second, and fatty acids.

Description

Moderate Asphalt Additives, Methods for Making Them and Asphalt Mixtures With Moderate Asphalt Additives, and Methods for Making the Same {MODIFIER FOR WARM ASPHALT

The present invention relates to a medium temperature asphalt additive, a method for manufacturing the same, and an asphalt mixture including the medium temperature asphalt additive, and a method for manufacturing the same. The present invention relates to asphalt additives and methods for preparing the same, and asphalt mixtures containing medium temperature asphalt additives and methods for producing the same.

When manufacturing the asphalt mixture is typically makes the CO ₂ in large quantities occurs, these CO ₂ is the Kyoto Protocol into force as a gas that can be called under greenhouse gases cited as one of the main cause of global warming, February 2005 In accordance with the obligation to reduce greenhouse gases, it is urgent to prepare measures to reduce greenhouse gas emissions when manufacturing asphalt mixtures.

Already, in advanced countries of the United States, technology development and research on medium-temperature and room-temperature asphalt mixtures have been actively conducted in order to reduce CO ₂ and secure long-term road pavement materials. .

In general, for hot asphalt mixtures (HMA), it is common to produce mixtures at temperatures of 150 to 170 ° C, while for warm asphalt mixtures (WMA), mixtures are produced at lower temperatures. It is a technique to do.

WMA can reduce the use of petroleum-based fuel, one of the main culprit of greenhouse gas emission, and also suppress the emission of harmful gas generated during the production and construction of WMA. After curing time can be shortened compared to the existing HMA, it is possible to open the traffic quickly, and the health of the worker is considered in the spotlight.

As such WMA, an asphalt mixture using polyethylene wax-based sasobit manufactured by Fischer Tropsch Synthesis is widely known.

Sasobit is a compound that is solid at room temperature, and melts and turns into a fluid when the temperature is increased. It rapidly drops the viscosity of the asphalt above the melting temperature and solidifies below the melting temperature, thereby adding an additive to improve the performance of the medium-temperature asphalt mixture. Has been used as.

However, such polyethylene wax is a raw material derived from petroleum, and since the generation of greenhouse gases and harmful gases are inevitable in the manufacturing process, there is a limit that does not meet the purpose of developing eco-friendly WMA. Development of medium-temperature asphalt additives is urgent.

Patent Application No. 10-2008-0126566 Patent Application No. 10-2009-0014623 Patent Application No. 10-2009-0081138 Patent Application No. 10-2010-0096217 Patent Application No. 10-2010-7012956 Patent Application No. 10-2011-0048927 Patent Application No. 10-2011-0049172

The present invention has been invented to improve the above problems, the medium temperature asphalt additive and the method of manufacturing the same and the asphalt mixture containing the medium temperature asphalt additive to use the eco-friendly material and reduce the energy consumption in the manufacturing process and this It is to provide a method of manufacturing.

In order to achieve the above object, the present invention comprises a mixture of a fatty acid having 6 to 25 carbon atoms, Ca-based catalyst and Zn-based catalyst, 50 to 70% by weight of palmitic acid based on the total weight of the fatty acid ( Palmitic Acid) and 30 to 50% by weight of stearic acid (Stearic Acid) will be able to provide a moderate temperature asphalt additive.

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In addition, fatty acids include capric acid, lauric acid, myristic acid, palmitic acid, palmitic acid, stearic acid, stearic acid, and oleic acid. (Oleic Acid), Ricinoleic acid, Vaccenic Acid, Linoleic Acid, Alpha-Linolenic Acid (ALA), Gamma-Linolenic Acid, GLA), Arachidic Acid, Gadoleic Acid, Arachidonic Acid (AA), EPA (5,8,11,14,17-eicosapentaenoic acid), Behenic acid acid), Erucic acid (Erucic acid), DHA (4,7,10,13,16,19-docosahexaenoic Acid), linoseric acid (Lignoceric acid) is characterized in that any one or at least one combination.

In addition, the moderate-temperature asphalt additive is characterized in that it comprises 5 to 15% by weight of Ca-based catalyst and 3 to 9% by weight of Zn-based catalyst based on the total weight of fatty acids.

The Ca-based catalyst is one of Ca (OH) ₂ , CaCl ₂ , and CaO, and the Zn-based catalyst is one of Zn (OH) ₂ , ZnCl ₂ , and ZnO.

On the other hand, the present invention includes 3 to 8% by weight of the asphalt based on the total weight of the asphalt mixture, 0.1 to 10% by weight of the medium temperature asphalt additive based on the total weight of the asphalt, the medium temperature asphalt additive is 6 carbon atoms It is composed of a mixture of 25 to 25 fatty acids, Ca-based catalyst and Zn-based catalyst, 50 to 70% by weight of palmitic acid and 30 to 50% by weight of stearic acid based on the total weight of the fatty acid ( Stearic Acid) may provide an asphalt mixture containing a moderate temperature asphalt additive, characterized in that it is included.

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In addition, the present invention, the asphalt mixture is 3 to 8% by weight based on the total weight of the asphalt mixture, and 0.1 to 10% by weight of the medium-temperature asphalt additive based on the total weight of the asphalt added to the asphalt mixture of the asphalt mixture Added to and aged at 120 to 150 ° C. for 1 to 3 hours, wherein the intermediate asphalt additive is composed of a mixture of a fatty acid having 6 to 25 carbon atoms, a Ca-based catalyst, and a Zn-based catalyst, based on the total weight of the fatty acids. It may also be possible to provide a method for preparing an asphalt mixture comprising a moderate temperature asphalt additive comprising 50 to 70% by weight of palmitic acid and 30 to 50% by weight of stearic acid. .

Here, the middle temperature asphalt additive is characterized in that 30 to 50% by weight of stearic acid (Stearic Acid) is added based on the total weight of fatty acids.

At this time, it is preferable that 5 to 15% by weight of Ca-based catalyst and 3 to 9% by weight of Zn-based catalyst are added based on the total weight of fatty acids.

In addition, the present invention is a first step of melting the first fatty acid having 6 to 25 carbon atoms at 170 to 190 ℃, a Ca-based catalyst and Zn-based catalyst and stirred for 2 to 5 hours at 100 to 200rpm; A second step of mixing and melting the purified and hydrogenated second fatty acid having 6 to 25 carbon atoms into the first fatty acid after the first step is completed; A third step of modifying the third fatty acid having 6 to 25 carbon atoms into the mixture of the first and second fatty acids after the second step is completed and stirring the mixture at 100 to 200 rpm for 1 to 3 hours; And a fourth step of cooling the mixture of the first, second, and third fatty acids.

In this case, the first, second and third fatty acids, capric acid, lauric acid, lauric acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid (Stearic Acid), Oleic Acid, Ricinoleic acid, Vaccenic Acid, Linoleic Acid, Alpha-Linolenic Acid (ALA), Gamma Nolanic Acid (Gamma-Linolenic Acid, GLA), Arachidic Acid, Gadoleic Acid, Arachidonic Acid (AA), EPA (5,8,11,14,17-eicosapentaenoic acid ), Behenic acid, erucic acid, DHA (4,7,10,13,16,19-docosahexaenoic acid), or a combination of at least one or more of It is characterized by.

In addition, the first fatty acid is characterized in that stearic acid.

In addition, the second fatty acid is characterized in that 10 to 60% by weight based on the total weight of the first fatty acid.

Here, the second fatty acid is characterized in that any one or a combination of at least one of coconut oil, palm oil, olive oil, castor oil, grape seed oil, linseed oil, peanut oil, canola oil.

At this time, the third fatty acid is characterized in that 10 to 40% by weight of oleic acid based on the total weight of the first fatty acid.

And, based on the total weight of the first, second, third fatty acids 5 to 15% by weight of the Ca-based catalyst, characterized in that it comprises 3 to 9% by weight of the Zn-based catalyst.

The Ca-based catalyst is one of Ca (OH) ₂ , CaCl ₂ , and CaO, and the Zn-based catalyst is one of Zn (OH) ₂ , ZnCl ₂ , and ZnO.

According to the present invention according to the embodiment as described above can achieve the following effects.

First, the present invention can reduce the energy consumption in the manufacturing process by mixing the asphalt mixture using a moderate temperature asphalt additive obtained by adding a Ca-based catalyst and a Zn-based catalyst to fatty acids obtained from environmentally friendly vegetable or animal fats.

Therefore, when using the medium-temperature asphalt additive and the asphalt mixture containing the same according to various embodiments of the present invention can improve the structural strength of the construction surface is made of pavement, plastic deformation of the asphalt pavement, pavement breakage due to moisture, or Various post-construction defects such as low temperature cracking will be minimized.

1 is a block diagram showing a method for manufacturing a medium-temperature asphalt additive according to an embodiment of the present invention

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a block diagram showing a method for manufacturing a medium-temperature asphalt additive according to an embodiment of the present invention.

First, the middle temperature asphalt additive according to an embodiment of the present invention is composed of a mixture of a fatty acid having 6 to 25 carbon atoms, a Ca-based catalyst, and a Zn-based catalyst.

Most fatty acids having 6 to 25 carbon atoms can be obtained from environmentally friendly materials such as vegetable fats or animal fats.

For example, the medium-temperature asphalt additive according to one embodiment of the present invention may be such that 30 to 50% by weight of stearic acid (Stearic Acid) having 18 carbon atoms based on the total weight of fatty acids.

In addition, the medium-temperature asphalt additive according to an embodiment of the present invention is 50 to 70 wt% of palmitic acid having 16 carbon atoms and 30 to 50 wt% of 18 carbon atoms based on the total weight of fatty acids. It may be possible to include stearic acid.

More preferably, about 60% by weight of palmitic acid can be mixed with about 40% by weight of stearic acid to produce a moderate temperature asphalt additive.

Meanwhile, in addition to the fatty acids described above, fatty acids include capric acid, lauric acid, myristic acid, palmitoleic acid, oleic acid, and ricinoleic acid. Ricinoleic acid, Vaccenic Acid, Linoleic Acid, Alpha-Linolenic Acid (ALA), Gamma-Linolenic Acid (GLA), Arachidic Acid (Arachidic) Acid), Gadoleic Acid, Arachidonic Acid (AA), EPA (5,8,11,14,17-eicosapentaenoic acid), Behenic acid, Erucic acid , DHA (4,7,10,13,16,19-docosahexaenoic acid), Linoceric acid (Lignoceric acid) can be prepared by selecting any one or at least one combination.

Here, the middle temperature asphalt additive according to an embodiment of the present invention preferably includes 5 to 15% by weight of Ca-based catalyst and 3 to 9% by weight of Zn-based catalyst based on the total weight of fatty acids.

More preferably, about 9% by weight of Ca-based catalyst and about 6% by weight of Zn-based catalyst are generally added.

In this case, the Ca-based catalyst may be selected from Ca (OH) ₂ , CaCl ₂ , CaO, and the Zn-based catalyst may be selected from Zn (OH) ₂ , ZnCl ₂ , and ZnO, respectively, to prepare a medium-temperature asphalt additive.

On the other hand, by using such a medium-temperature asphalt additive, it is also possible to prepare an asphalt mixture utilized for road pavement containing 0.1 to 10% by weight of the medium-temperature asphalt additive, based on the total weight of the asphalt added to the asphalt mixture. .

In order to improve the durability and structural strength after asphalt construction, the medium-temperature asphalt additive is 3 to 8% by weight based on the total weight of the asphalt mixture and 1 to 5% by weight based on the total weight of the asphalt added to the asphalt mixture. It is preferable to add.

For reference, 'asphalt mixture' means that asphalt is mixed with aggregate having various particle sizes.

It will be described below with respect to the method for producing the asphalt additive as described above.

According to one embodiment of the present invention, after melting the fatty acid having 6 to 25 carbon atoms, Ca-based catalyst and Zn-based catalyst may be added to prepare a medium-temperature asphalt additive.

Looking at the method for producing the asphalt additive in more detail, as follows.

First, in the first step S1, the first fatty acid having 6 to 25 carbon atoms is dissolved at 170 to 190 ° C, a Ca-based catalyst and a Zn-based catalyst are added, and the mixture is stirred at 100 to 200 rpm for 2 to 5 hours.

Preferably, the first fatty acid is dissolved at a temperature of about 180 ° C., and a Ca-based catalyst and a Zn-based catalyst are added and stirred at 150 rpm for about 4 hours.

Here, the Ca-based catalyst is added in 5 to 15% by weight based on the total weight of the first, 2, 3 fatty acids, the Zn-based catalyst is added in 3 to 9% by weight, Ca-based catalysts Ca (OH) ₂ , CaCl ₂ , CaO, Zn-based catalyst may be prepared by selecting one of Zn (OH) ₂ , ZnCl ₂ , ZnO.

Next, in the second step S2, the second fatty acid having 6 to 25 purified and hydrogenated carbon atoms is added to the first fatty acid after the first step S1 is completed and mixed and melted.

At this time, the second fatty acid 10 to 20 minutes after the completion of the first step (S1) to allow the first fatty acid is slightly cooled and then added.

Subsequently, in the third step S3, the modified third fatty acid having 6 to 25 carbon atoms is introduced into the mixture of the first and second fatty acids after the second step S2 is completed, and then, at 100 to 200 rpm, preferably 150 rpm. Stir for 3 hours, preferably 2 hours.

Thereafter, in the fourth step S4, the mixture of the first, second and third fatty acids is cooled.

At this time, the mixture of the first, second, and third fatty acids is cooled to 3 to 4 hours in order to drop into the temperature range of 140 to 150 ℃ in the temperature range of about 170 to 190 ℃, that is around 180 ℃ for the first time to put into the asphalt mixture desirable.

Therefore, the middle temperature asphalt additive prepared according to the above embodiment is added to the asphalt mixture at 0.1 to 10% by weight based on the total weight of the asphalt added to the asphalt mixture, and aged by 1 to 3 hours at 120 to 150 ° C. An asphalt mixture is obtained which contains mesophilic asphalt additives according to one embodiment of the invention.

Here, in one embodiment of the present invention, the first fatty acid is stearic acid, and the second fatty acid is added at 10 to 60% by weight based on the total weight of the first fatty acid, and the second fatty acid is coconut oil, palm oil, Olive oil, castor oil, grapeseed oil, flax oil, peanut oil, canola oil may be selected or applied in combination of at least one or more.

At this time, in one embodiment of the present invention, the third fatty acid may use 10 to 40% by weight of oleic acid based on the total weight of the first fatty acid.

As described above, the core technical idea of the medium-temperature asphalt additive according to various embodiments of the present disclosure, a method for manufacturing the same, and an asphalt mixture including the medium-temperature asphalt additive and a method for producing the same are relatively low by reducing the temperature during production and construction. It is also intended to achieve the same quality level as the heated asphalt mixture (hereinafter HMA) even at temperature.

However, the recent increase in traffic volume and acceleration of climate warming act as a deterrent to the commonality of the asphalt mixture, and rutting, which is mainly caused by initial damage during asphalt pavement, depends on the characteristics of the asphalt mixture. I will receive it.

Therefore, in order to minimize such inhibitory factors, check the invasiveness grade of the asphalt mixture prepared by adding the mesophilic asphalt additive according to the various embodiments described above, and whether or not the quality grade of PG64-22, which is the target grade, can be ensured. The test yielded the results shown in Table 1 below.

Test Items unit result General asphalt With moderate asphalt additives Common grade
(Performance Grade) - PG 64-22 PG 64-22 G ^* / sinδ value at 64 ℃ (Original) kPa 1.180 1.020 G ^* / sinδ value at 64 ℃
(After RTFO aging) kPa 2.460 3.450 G ^* / sinδ value at 25 ° C
(After PAV aging) kPa 3,140 1,870 Strength at -12 ℃ kPa 138.921 112.877 M value at -12 ° C - 0.341 0.396 Flash point (℃) ℃ 325 324 Viscosity (135 ° C) Pa? S 0.356 0.382 After RTFO Aging
Mass loss % 0.08 0.10

For reference, the common grade rating of asphalt is to select appropriate mid-temperature asphalt additives suitable for local characteristics in consideration of on-site weather and traffic conditions so as to resist pavement failure such as plastic deformation and cold cracking at high temperature.

The common grade criteria are based on commonality and therefore focus on the three major common variables of plasticity: permanent deformation, fatigue cracking and cold cracking.

Moreover, the regulation also addresses the safety, pumping, handling and over-aging of asphalt, and the method of expressing mesophilic asphalt additives by common grade is indicated by PG64-22, the former number indicates the high temperature grade and the latter number Low temperature rating is indicated.

The high temperature grade is the design temperature of the summer and the highest temperature with durability. The low temperature grade is the design temperature of the winter season and represents the lowest temperature expected to resist cracking by low temperature.

In Table 1, RTFO refers to a rotating thin film oven, and simulated by aging the asphalt additive in the medium temperature in such a rotating thin film oven.

In addition, PAV refers to the pressure aging vessel (aging vessel), and the aged sample in the rotary thin film oven is aged again in the pressure aging vessel to test the long-term aging state of the heated asphalt pavement layer.

In this process, the sample is exposed to heat and pressure to simulate long-term aging in the package.

In addition, G ^* / sinδ is related to the dynamic shear rheometry test, G is a complex shear modulus, δ represents the phase angle, superfab specification for the dynamic shear rheological test of viscoelastic medium temperature asphalt additive This is a required argument.

As shown in Table 1 above, the asphalt mixture (hereinafter referred to as WMA) in which the medium-temperature asphalt additive is added according to various embodiments of the present invention shows a PG64-22 grade, and it is confirmed that it is durable against plastic deformation and low temperature cracking due to high temperature. Can be.

The quality of mesothelial asphalt additive has many quality characteristics in terms of its functional aspects, but the Marshall Stability (MS), flow as defined in Korean Industrial Standard (KS F 2349: 2010) or Ministry of Land, Transport and Maritime Asphalt Mixture Production and Construction Guidelines (2009). Indirect tensile strength (ITS) test and its tensile strength index (DD) to determine dynamic stability (DS) and resistance to moisture damage (Flow), void (VTM), and resistance to plastic deformation. TSR).

In order to evaluate the compaction characteristics of the WMA prepared from various embodiments of the present invention, the amount of the medium-temperature asphalt additive is changed to 2 to 3% by weight based on the total weight of the asphalt added to the asphalt mixture, as shown in Table 2, and the asphalt mixture The time of aging was also changed to 60 to 150 minutes to observe the change of compaction.

content
(%) time
(min) Actual density
(g / cm3) content
(%) time
(min) Actual density
(g / cm3) content
(%) time
(min) Actual density
(g / cm3)
2

60 2.425
2.5

60 2.427
3

60 2.419 90 2.404 90 2.408 90 2.391 120 2.419 120 2.419 120 2.410 150 2.418 150 2.419 150 2.426

The compaction characteristics of WMA were shown in Table 2, and the specimens were prepared by adding medium temperature asphalt additive at a ratio of about 2% by weight based on the total weight of the asphalt added to the asphalt mixture and aging for about 120 minutes. It is judged to have sufficient compaction effect and economic effect is also great.

In addition, looking at the temperature-specific characteristics change that is mixed with the intermediate temperature asphalt additive in the asphalt mixture, as shown in Table 3 below.

In other words, the WMA has a sharp increase in density at 150 ° C. and a decrease in porosity, and a high stability value but a flow value indicating displacement is also generally high.

Considering the economics and the stability of the product, when the porosity is 4%, it is optimal to mix at a temperature of 130 ° C., which is relatively stable and have a low flow value at a porosity of 4%. It is determined that the optimum temperature condition.

Mixing temperature
(℃) Compaction temperature
(℃) Actual density
(g / cm3) Porosity
(%) Stability
(N) Flow value
(1/100 cm)
150

100 2.408 4.95 10485.2 28.66 105 2.429 4.12 10552.6 28.70 110 2.434 3.89 11329.4 28.66 115 2.450 3.26 11666.0 28.63
140

100 2.410 4.85 9888.2 29.06 105 2.412 4.77 10763.4 27.22 110 2.417 4.57 11448.2 29.02 115 2.428 4.13 11207.8 28.96
130
105 2.415 4.68 9408.2 26.08 110 2.427 4.29 9807.0 27.30 115 2.426 4.22 10575.6 26.04

In order to evaluate the water sensitivity of the mesophilic additives, a test by KS F 2398 was conducted by comparing HMA and WMA, and the results are shown in Table 4.

Kinds division Porosity (%) Water Saturation Rate (%) Load (N) The tensile strength
(MPa) Tensile Strength Ratio HMA
Dry Sample 7.05 - 11943.3 1.123 0.671
Water Saturated Sample 7.31 60.55 8018.3 0.753 WMA
Dry Sample 6.85 - 9828.3 0.970 0.803
Water Saturated Sample 7.04 56.34 7881.7 0.778

As shown in Table 4, WMA was able to obtain a 16% improvement in water resistance than HMA.

Next, the Marshall stability characteristics of the WMA will be described with reference to Table 5 below.

Test Items
standard
Test result HMA WMA Asphalt content (%) - 5.0 5.0 Stability (N) 7,500 or more 11,625 11,853 Flow value (1/100 cm) 20 to 40 26.2 29.8

In other words, the Marshall stability characteristics of WMA showed a tendency to increase by about 2% compared to HMA as shown in Table 5 above, but showed about 37% higher than 7,500N, the quality standard of KS F 2349.

Next, the dynamic stability characteristics of the WMA will be described with reference to Table 6 below.

Kinds Total deformation
(mm) Strain rate
(mm / min) Dynamic stability
(Times / mm) HMA 4.006 0.0212 1,980 WMA 3.756 0.0154 2,737

For reference, the dynamic stability characteristics were made by wheel tracking test.

As shown in Table 6, the dynamic stability was about 28% higher than that of HMA in the asphalt mixture in which the medium-temperature asphalt additive was added, and the performance was much better than the quality standard of KS F 2349.

The dynamic stability test value of WMA can ensure high fluid resistance, which indicates long-term package compatibility and high resistance to plastic deformation.

Next, the indirect tensile strength characteristics of the WMA will be described with reference to Table 7 below.

Kinds Temperature (℃) Thickness (mm) Load (N) Tensile Strength (MPa)
HMA
10 63.57 43,140.0 4.252 25 63.23 15,958.3 1.581 40 63.57 6,075.0 0.599
WMA
10 63.67 33,185.0 3.226 25 63.67 12,493.3 1.273 40 64.13 3,398.3 1.273

For reference, the indirect tensile strength test was performed at 10 ℃, 25 ℃ and 40 ℃, respectively, and the results showed that WMA tended to be somewhat indirect tensile strength lower than that of HMA. At 25 ° C, which can be said to have a large effect, WMA shows an indirect tensile strength that is about 37% higher than 0.8, the standard value of KS F 2349, which is considered to be excellent in fatigue cracking and crack resistance.

Comprehensive analysis of the above results, WMA produced from various embodiments of the present invention can achieve the same workability as HMA, even if the production temperature is reduced to about 30 ~ 40 ℃ compared to HMA, excellent compaction degree It can be seen that the product has excellent physical properties and common properties such as moisture resistance, flow resistance, and crack resistance.

Therefore, WMA produced from various embodiments of the present invention can significantly reduce the use of petroleum fuel compared to the existing HMA when applied and commercialized in the actual construction site, as well as reducing greenhouse gas emissions in the manufacturing process and construction process. You can do it.

As described above, the present invention provides a medium temperature asphalt additive, a method for preparing the same, and an asphalt mixture including the medium temperature asphalt additive and a method for manufacturing the same, which use environmentally friendly materials and reduce energy consumption in the manufacturing process. It can be seen that it is thought.

It will be apparent to those skilled in the art that many other modifications and applications are possible within the scope of the basic technical idea of the present invention.

S1 ... Step 1 S2 ... Step 2
S3 ... Step 3 S4 ... Step 4

Claims (21)

A mixture of a fatty acid having 6 to 25 carbon atoms with a Ca-based catalyst and a Zn-based catalyst,
50 to 70% by weight of palmitic acid (Palmitic Acid) and 30 to 50% by weight of stearic acid (Stearic Acid) based on the total weight of the fatty acid, the moderate temperature asphalt additive.
delete delete The method according to claim 1,
The fatty acid may be,
Capric acid, lauric acid, myristic acid, palmitic acid, palmitic acid, palmitic acid, stearic acid, oleic acid, Ricinoleic acid, Vaccenic Acid, Linoleic Acid, Alpha-Linolenic Acid (ALA), Gamma-Linolenic Acid (GLA), Arachidic Acid, Gadoleic Acid, Arachidonic Acid (AA), EPA (5,8,11,14,17-eicosapentaenoic acid), Behenic acid, Erucic acid (Erucic acid), DHA (4,7,10,13,16,19-docosahexaenoic acid), linocelic acid (Lignoceric acid) any one or a combination of at least one or more moderate asphalt additive.
The method according to claim 1,
The middle temperature asphalt additive,
A moderate temperature asphalt additive comprising 5 to 15 wt% of the Ca-based catalyst and 3 to 9 wt% of the Zn-based catalyst based on the total weight of the fatty acids.
The method according to claim 1,
The Ca-based catalyst is one of Ca (OH) ₂ , CaCl ₂ , CaO, Zn-based catalyst is a medium temperature asphalt additive, characterized in that one of Zn (OH) ₂ , ZnCl ₂ , ZnO.
3 to 8% by weight asphalt, based on the total weight of the asphalt mixture,
0.1 to 10% by weight of the middle-temperature asphalt additive based on the total weight of the asphalt,
The middle temperature asphalt additive is composed of a mixture of fatty acid having 6 to 25 carbon atoms, Ca-based catalyst and Zn-based catalyst,
Asphalt mixture with a moderate temperature asphalt additive, characterized in that 50 to 70% by weight of palmitic acid (Palmitic Acid) and 30 to 50% by weight of stearic acid (Stearic Acid) based on the total weight of the fatty acid .
delete Dissolving the first fatty acid having 6 to 25 carbon atoms at 170 to 190 ° C., adding a Ca-based catalyst and a Zn-based catalyst and stirring the mixture at 100 to 200 rpm for 2 to 5 hours;
A second step of mixing and melting the purified and hydrogenated second fatty acid having 6 to 25 carbon atoms into the first fatty acid after completion of the first step;
A third step of adding a modified fatty acid having 6 to 25 carbon atoms to the mixture of the first and second fatty acids after the second step is completed, and stirring the mixture at 100 to 200 rpm for 1 to 3 hours; And
And a fourth step of cooling the mixture of the first, second and third fatty acids.
3 to 8% by weight of asphalt, based on the total weight of the asphalt mixture, and 0.1 to 10% by weight of moderate-temperature asphalt additive, based on the total weight of the asphalt to be added to the asphalt mixture, to the asphalt mixture, 120 Aged to 1 to 3 hours at 150 ℃,
The middle temperature asphalt additive is composed of a mixture of fatty acids having 6 to 25 carbon atoms, Ca-based catalyst and Zn-based catalyst, 50 to 70% by weight of palmitic acid based on the total weight of the fatty acid, and 30 to Method for producing an asphalt mixture containing mesophilic asphalt additive, characterized in that 50% by weight of stearic acid (Stearic Acid) is included.
delete delete The method according to claim 9,
The first, second, third fatty acids are,
Capric acid, lauric acid, myristic acid, palmitic acid, palmitic acid, palmitic acid, stearic acid, oleic acid, Ricinoleic acid, Vaccenic Acid, Linoleic Acid, Alpha-Linolenic Acid (ALA), Gamma-Linolenic Acid (GLA), Arachidic Acid, Gadoleic Acid, Arachidonic Acid (AA), EPA (5,8,11,14,17-eicosapentaenoic acid), Behenic acid, Erucic acid (Erucic acid), DHA (4,7,10,13,16,19-docosahexaenoic acid), linoseric acid (Lignoceric acid) any one or a combination of at least one or more methods for producing a moderate asphalt additive.
The method according to claim 9,
The first fatty acid is stearic acid, characterized in that the method for producing a moderate asphalt additive.
The method according to claim 9,
The second fatty acid,
Method of producing a moderate temperature asphalt additive, characterized in that 10 to 60% by weight based on the total weight of the first fatty acid.
The method according to claim 9,
The third fatty acid,
Method for producing a moderate temperature asphalt additive, characterized in that 10 to 40% by weight of oleic acid based on the total weight of the first fatty acid.
delete The method according to claim 9,
Method for producing a moderate temperature asphalt additive, comprising 5 to 15% by weight of the Ca-based catalyst and 3 to 9% by weight of Zn-based catalyst based on the total weight of the first, 2, 3 fatty acids.
The method according to claim 15,
The second fatty acid,
Method for producing a moderate temperature asphalt additive, characterized in that any one or a combination of at least one of coconut oil, palm oil, olive oil, castor oil, grape seed oil, flax oil, peanut oil, canola oil.
delete 19. The method of claim 18,
The Ca-based catalyst is one of Ca (OH) ₂ , CaCl ₂ , CaO, the Zn-based catalyst is a method for producing a moderate temperature asphalt additive, characterized in that one of Zn (OH) ₂ , ZnCl ₂ , ZnO.

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