KR101980140B1 - Ascon composition - Google Patents

Abstract

A circulating room temperature ascon composition of the present invention comprises: 1 to 10 parts by weight of a filler; 0.1 to 1 part by weight of a phase change material (PCM); 0.01 to 2 parts by weight of cement; 1 to 10 parts by weight of asphalt; and 1 to 10 parts by weight of water, wherein the phase change material (PCM) includes two or more phase change materials having different phase transition temperatures, thereby being able to improve a heat storage effect, durability, water resistance, and strength.

Description

BACKGROUND ART [0002] ASCON COMPOSITION

The present invention relates to a circulating room temperature ascon composition and a process for its preparation.

In recent years, there has been an increasing demand for improvement in the indoor environment in accordance with changes in the housing culture and the living environment. Therefore, it is required to develop a fusion technology to conserve energy of a building and to maintain the comfort of an indoor environment, and such technology can largely be divided into cooling and heating and insulation technology. The Korean house is a traditional seating structure, which uses the floor heating system through the hot water circulation system to increase the surface temperature of the indoor wall, thereby reducing the radiative heat of the occupant.

In order to increase the comfort of radiant heating, it is necessary to constantly supply the heating heat of the room to lower the temperature difference between the floor and the indoor air, and in the case of cooling, if the constant air temperature in the room can not be controlled, the discomfort greatly increases. Therefore, the energy problem due to excessive operation of the radiator and the cooler is a great concern.

Recently, there is a growing interest in energy conservation, and there is an active movement to develop high thermal efficiency building materials in the building sector, which occupies a large portion of energy consumption. Among them, a latent heat storage type energy storage method using a phase change material (PCM), which is one of materials that effectively store thermal energy, is attracting attention.

A phase change material is a material whose phase changes according to a change in temperature, and has a property of accumulating thermal energy in the form of latent heat when the material changes from a solid to a liquid or from a liquid to a solid. Latent heat refers to the heat absorbed or released according to the change of the material state. It is characterized by the excellent heat energy storage efficiency compared to the sensible heat according to the temperature change. However, since the phase change temperature is determined according to the phase change material, There is a disadvantage that it can not actively cope.

Further, when a phase change material is added, there is a problem that durability, water resistance and strength are lowered.

Accordingly, there is a need for an ascon composition capable of improving not only the heat storage efficiency but also the durability, water resistance, and strength in various seasons and climate change.

1. Patent Registration No. 10-1759616 'Anti-frost type colored cold room recirculating ascon composition using asphalt concrete recycled aggregate and white cement (filing date 2016.01.26) 2. Registered patent publication No. 10-1242097 'Environment-friendly normal temperature circulating ascon' (filed on September 28, 2012)

It is an object of the present invention to provide a circulating room temperature ascon composition which is applicable to various climates and has improved durability, water resistance and strength, and a method for producing the same.

The above and other objects of the present invention can be achieved by the present invention described below.

One aspect of the present invention relates to a circulating room temperature asbestos composition.

According to one embodiment of the present invention, the circulating room temperature ascon composition comprises 1 to 10 parts by weight of a filler relative to 100 parts by weight of an aggregate; 0.1 to 1 part by weight of phase change material (PCM); 0.01 to 2 parts by weight of cement; 1 to 10 parts by weight of asphalt; And 1 to 10 parts by weight of water, wherein the phase change material (PCM) comprises two or more phase change materials having different phase transition temperatures.

The phase transition material (PCM) may have a phase transition temperature difference of 5 ° C or higher.

The phase change material (PCM) may include 50 to 70 wt% of a first phase change material having a phase transition temperature of 18 to 30 DEG C and 30 to 50 wt% of a second phase change material having a phase transition temperature of 30 DEG C or more .

The composition may further include 0.1 to 2 parts by weight of an anti-peeling agent.

In addition, the composition may contain the phase change material (PCM) and the anti-peeling agent in a weight ratio of 0.5: 1 to 2: 1.

Also, the composition may further include 5 to 20 parts by weight of slag balls.

Another aspect of the present invention relates to a process for preparing a circulating room temperature ascon composition.

In one embodiment, the method for preparing a circulating room temperature asbestos composition includes the steps of mixing an aggregate, a filler, a phase change material (PCM), cement, and water to prepare a mixture; Heating the asphalt; Introducing the heated asphalt into the mixture; And heating the mixture to 100 < 0 > C to 140 < 0 > C.

INDUSTRIAL APPLICABILITY The present invention has the effect of providing a circulating room temperature ascon composition which is applicable to various climates and has improved durability, water resistance and strength and a method for producing the same.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a photographic image of an asphalt concrete produced using the circulating room temperature asconcrete compositions of the examples and comparative examples of the present invention. FIG.
FIG. 2 is a graph showing the surface maximum temperature of the asphalt concrete to which the circulating room temperature ascon composition of the present invention and the comparative example is applied.
3 is a graph showing the surface maximum temperature of asphalt concrete to which the circulating room temperature ascon composition of the present invention and the comparative example is applied.

Hereinafter, the present invention will be described in more detail.

In the following description of the present invention, detailed description of known related arts will be omitted when it is determined that the gist of the present invention may be unnecessarily obscured by the present invention.

In the case where the word 'includes', 'having', 'done', etc. are used in this specification, other parts can be added unless '~ only' is used. Unless the context clearly dictates otherwise, including the plural unless the context clearly dictates otherwise.

Also, in interpreting the constituent elements, even if there is no separate description, it is interpreted as including the error range.

In the present specification, 'X to Y' representing the range means 'X or more and Y or less'.

In the present specification, the term "phase transition temperature" may mean the temperature of the peak during DSC analysis.

Circulating room temperature ascon composition

The circulating room temperature ascon composition of the present invention includes aggregate, filler, phase change material (PCM), cement, asphalt and water.

Each component will be described in detail below.

The aggregate is not limited in its kind and form so long as it is an ordinary aggregate used in an ascon composition. For example, the aggregate for an ascon may be classified into a coarse aggregate (usually a gravel) and a fine aggregate , Crushed sand obtained by breaking a gravel or the like, or a mixture thereof), and the coarse aggregate and the fine aggregate may mean a new aggregate. Depending on the cause of formation, natural aggregates (such as river sand, strong gravel, sea sand, sea gravel, land sand, land gravel, mountain sand, and mountain gravel), artificial aggregates (crushed sand, crushed gravel), industrial by- Slag, copper slag, etc.), recycled aggregate (crushed sand with crushed concrete waste, crushed gravel, etc.), and the density of the aggregate is usually in the range of 2.5 to 2.7 g / (Such as natural volcanic ash, pumice, artificial vermiculite, pearlite, etc.) and heavy aggregate (having an absolute density of 2.8 g / cm 3 or more, such as barite, iron ore, etc.) And aggregate obtained). Also, recycled aggregate can be used as aggregate, and recycled aggregate can be aggregate suitable to the regulation of Article 35 of the Act on the Promotion of Recycling of Construction Waste by physical or chemical treatment process.

The aggregate used as one component of the circulating room temperature ascon composition according to the present invention may be selected from natural or artificial stone, gravel, sand, limestone, steel dust, bottom ash or slag, Considering the durability of the room temperature ascon, it is preferable that it is a limestone aggregate. Limestone aggregate is crushed aggregate of limestone (sedimentary rock composed mainly of calcium carbonate), which improves the fluidity and the strength of the circulating cold asphalt.

The particle size range of the aggregate used as the one component of the circulating room temperature ascon composition according to the present invention is not limited to the use in which the circulating room temperature ascon is used (such as roadway packing, catcher, sidewalk packaging or repair, tunnel packing or repairing, For example, in the range of from 0.05 to 50 mm depending on the thickness of the base layer and the like. In order to smoothly mix with other components and to ensure a predetermined strength, 1 to 10 mm may be used. More specifically, Can be used. Specifically, the aggregate of the circulating room temperature ascon composition of the present invention may contain recycled recycled aggregate, and in this case, the cost is reduced.

In one embodiment, the aggregate comprises 20 to 40 wt% of a new aggregate having a particle size of 20 to 30 mm, 15 to 35 wt% of a recycled aggregate having a particle size of 10 to 19 mm, and 35 to 50 wt% of a recycled aggregate having a particle size of 3 to 9 mm .

In another embodiment, the aggregate may comprise 30 to 50 wt% of recycled aggregate having a particle size of 10 mm to 19 mm and 50 to 70 wt% of recycled aggregate having a particle size of 3 mm to 9 mm.

The filler is not particularly limited in its kind and form if it is a conventional filler used in a circulating room temperature ascon composition. Examples of the filler include limestone powder, slaked lime, fly ash, recovered dust, electric furnace steel dust, casting dust, And powders of other mineral substances. The filler which is one component of the circulating room temperature ascon composition according to one embodiment of the present invention may be composed of at least one kind selected from the group consisting of limestone powder, cement, slaked lime, and fly ash, In terms of ensuring that the lime can be used.

The filler may be included in an amount of 1 to 10 parts by weight, specifically 2 to 7 parts by weight, based on 100 parts by weight of the aggregate. The circulating room temperature ascon composition may have a predetermined strength in the above content range.

The phase change material (PCM) includes two or more phase change materials having different phase transition temperatures. Since the phase change material of the present invention contains two or more phase change materials having different phase transition temperatures, there is an advantage that it can be applied to various climates. The phase transition material can prevent the temperature from rising sharply or from dropping rapidly due to the effect of latent heat and thermal storage. In the present invention, by including two or more phase change materials having different temperatures, It has excellent latent heat and heat storage effect.

The phase change material (PCM) may have a phase transition temperature difference of 5 ° C or more, specifically 5 ° C to 15 ° C, more specifically 7 ° C to 12 ° C. Within the above difference range, there is an advantage in that latent heat and heat storage effect are excellent in various climates and seasons.

In an embodiment, the phase change material (PCM) comprises 50 to 70% by weight of a first phase change material having a phase transition temperature of 18 캜 to 30 캜, specifically 20 캜 to 30 캜, more specifically 22 캜 to 30 캜, 30 to 50% by weight of a second phase transfer material having a melting point higher than 30 DEG C, for example, higher than 30 DEG C and 40 DEG C, particularly 31 DEG C to 38 DEG C. [ In this case, the heat storage effect can be optimized in various seasons. For example, the phase transition temperature of the first phase change material may be based on heating, and the phase transition temperature of the second phase change material may be based on cooling.

The phase change material may be included in an amount of 0.1 to 1 part by weight based on 100 parts by weight of the aggregate. If the content falls short of the above range, the heat storage effect of the circulating room temperature ascon composition is insignificant, and if the content exceeds the above range, the durability, rehydration and strength of the circulating room temperature ascon composition may deteriorate.

The cement includes Portland cement, blast furnace cement, silica cement, fly ash cement and the like, among which portland cement can be used. In another embodiment, the cement may be fly ash cement which is a mixture of Portland cement and fly ash, which may be classified as A (5-10%), B (10-20%), C (20 ~ 30%). In the present invention, it is possible to freely and selectively use according to the use of the circulating room temperature ascon. Meanwhile, fly ash refers to coal ash collected from a flue gas of a boiler that burns pulverized coal with a dust collector. The spherical particle size is similar to that of cement, and alumina and silica are the main components It is used as an admixture of concrete. When the cement is mixed with about 20 to 30% of fly ash, the workability is improved and the hardening heat is mitigated and the long-term strength and water tightness are improved, which is also economical.

The cement may be included in an amount of 0.01 to 2 parts by weight based on 100 parts by weight of the aggregate. In the above range of contents, the circulating room temperature ascon composition may have appropriate processability.

The asphalt not only imparts a bonding force to the circulating room temperature ascon composition but also imparts fluidity and can smoothly perform the packaging. If the asphalt is a conventional unheated asphalt, the type and shape of the asphalt is not limited to a great extent, and examples thereof include straight asphalt, cutback asphalt, emulsified asphalt, modified asphalt and the like. Modified asphalt improves the physical properties of asphalt for the purpose of improving the durability, fluidity, abrasion resistance, slip resistance, etc. of asphalt pavement. Rubber such as SBS, SBR or plastics such as polyethylene and polypropylene are usually added. In a specific example, the cyclic room temperature asconcrete composition of the present invention may be an emulsified asphalt.

The asphalt may be included in an amount of 1 to 10 parts by weight, specifically, 1.5 to 5 parts by weight based on 100 parts by weight of the aggregate. In this range, there is an advantage in that the balance of the bonding force and the fluidity of the circulating room temperature asbestos composition is excellent.

The water may be included in an amount of 1 to 10 parts by weight, specifically, 11.5 to 5 parts by weight based on 100 parts by weight of the aggregate. It is possible to ensure a proper fluidity of the circulating room temperature ascon composition in the above content range.

The above-mentioned asbestos composition may further include an anti-peeling agent.

The anti-peeling agent improves adhesion when the aggregate surface of the asphalt is wet, and also serves to increase the resistance of the circulating cold asphalt as a component that prevents the once-adhered asphalt from peeling off due to external force or rain. Examples of the liquid phase peeling preventing agent commonly used in the ascon are quaternary amine used in combination with binder and powder peeling inhibitor such as limestone powder, slaked lime and portland cement added to aggregate. However, There is a limitation in preventing peeling of the ascon. In the present invention, dimer acid can be used as a main component of the anti-peeling agent, which is one component of the circulating room temperature ascon composition, in order to improve it.

The dimeric acid (CAS registration number: 61788-89-4) is a dicarboxylic acid or a dimerized fatty acid produced by dimerizing an unsaturated fatty acid by a polymerization reaction, , Adhesiveness, heat resistance, anti-corrosiveness, durability, chemical resistance, and thixotropy.

The anti-peeling agent may contain 70% by weight or more, specifically 75% by weight or more of dimeric acid, and may further include monomeric acid or trimeric acid as an additional component. The anti-peeling agent, which is one component of the circulating room temperature ascon composition according to the present invention, may be composed of a dimer acid only in some cases. Commercially available products that can be used as the anti-peeling agent which is one component of the circulating room temperature ascon composition according to the present invention include DIMER ACID NC-80 (supplied by NEXTCHEM Coporation, 75 to 85% by weight of dimer acid, 1 to 3% by weight of monomeric acid, 15% by weight to 22% by weight), CA2023 DIMER ACID (supplied by CHEMICAL ASSOCIATES, 87% by weight of C36 DIBASIC ACID as dimer acid, 10% by weight of TRIBASIC ACID having a molecular weight of about 845 as a trimer acid, 3% by weight of C18 MONOBASIC ACID as monomeric acid, ), UNIDYME 18 (supplied by ARIZONA CHEMICAL COMPANY, consisting of 100% by weight dimer of C18 unsaturated fatty acids as dimer acid), VDIMER 3690 DIMER ACID (supplied by Vantage Oleochemicals, dimer acid to 100% by weight of dimer of C18 unsaturated fatty acid , Empol 1062 Dimer Acid (supplied by BASF COPORATION, consisting of dimer acid and 100 wt% dimer of C18 unsaturated fatty acid), and the like.

The dimer acid used as the main component of the anti-peeling agent, which is one component of the circulating room temperature ascon in accordance with the present invention, is not limited in its origin and form, but a dimer of a vegetable oil fatty acid can be used. It may be composed of at least one member selected from the group consisting of oleic acid, linoleic acid, stearic acid and palmitic acid. The dimer acid is added to the vegetable oil fatty acid in an amount of 0.5 to 5 parts by weight based on 100 parts by weight of the starting fatty acid by adding alkylbenzene sulphonite, sodium lauryl sulphonite or polyglycol ether as a surfactant, and sodium sulphate or sodium chloride as a starter is added to the starting fatty acid 100 parts by weight of 0.5 to 5 parts by weight was added and the mixture was cooled to 0~10 ℃ seconds using the clay to obtain a raw material, separated by centrifuge, as a main catalyst with respect to the raw material, AlCl _3, SnCl ₂ and a co-catalyst with respect to the , LiCO ₃ , CaCO ₃ , MgO, benzyl peroxide or carbon in an amount of 1 to 5 parts by weight based on 100 parts by weight of the main catalyst. At this time, the vegetable oil fatty acid may be a fatty acid derived from a seed, rice bran, soybean, soybean or olive.

The anti-peeling agent may be included in an amount of 0.1 to 2 parts by weight based on 100 parts by weight of the aggregate. In the above content range, the durability, chemical resistance and heat resistance of the circulating room temperature ascon composition are improved.

In an embodiment, the circulating room temperature ascon composition of the present invention may contain the phase change material (PCM) and the anti-peeling agent in a weight ratio of 0.5: 1 to 2: 1. The balance of the heat storage effect, durability and water resistance of the circulating room temperature atmospheric acid composition is excellent in the weight ratio range.

The circulating room temperature ascon composition may further include a slag ball.

The slag ball means an atomized slag ball. Atomizing treatment refers to a process in which a converter or electric furnace slag contained in a molten state in a slag pot or similar vessel is dropped downward in a molten state and at the same time, / RTI > and / or water is sprayed to separate the falling slag into fine droplets. The falling slag receives kinetic energy from the mixed gas and receives the surface energy required to form a fine droplet.

The fine droplets formed in the above process have a spherical shape due to the surface tension and then cooled by a cooling medium such as air and water to form a solid slag ball. These solid phase slag balls have significantly different physical properties from bulk solidification slag or electric furnace slag treated by the conventional rapid cooling method. Conventional converter slag or electric furnace slag contains a large amount of unhardened calcium oxide (CaO) (aka free lime), which reacts with moisture to form calcium hydroxide (Ca (OH) ₂ ) But the slag ball contained in the circulating room temperature ascon composition according to the present invention is advantageous in that there is no possibility that the slag ball is differentiated because there is almost no unexposed quicklime .

The circulating room temperature ascon composition containing the slag balls treated with the above-mentioned atomization can improve the strength and fluidity of the circulating room temperature ascon without any additional treatment. The reason is attributed to the characteristics of the slag balls subjected to the atomization treatment. The slag balls subjected to the atomization treatment have a uniform particle size distribution, a fine particle size, no additional treatment for special particle size adjustment, no heavy metals, There is no fear of elution, and the water absorption rate is low.

The slag balls may be slightly different depending on the steel to be produced, but it is preferable that the slag balls contain 14.6 to 63 wt% of CaO, 22 to 46 wt% of Fe ₂ O ₃ , 10 to 22 wt% of SiO ₂ , 6 to 10 wt% of MgO, Al ₂ O _{3 of} not more than 5.5% by weight.

The slag ball may be included in an amount of 5 to 20 parts by weight, specifically 6 to 15 parts by weight, based on 100 parts by weight of the aggregate. The balance between the heat storage characteristics and strength of the circulating room temperature ascon composition is excellent in the above content range.

In addition to the above-mentioned components, the above-mentioned recirculating room temperature ascon composition may further contain rubber (SBR, SBS), plastic (polyethylene, polypropylene, ethylvinylacetate, EPDM, etc.), fiber (polyethylene fiber, polypropylene fiber, polyester fiber, An antioxidant (calcium salt), a quaternary amine, a modifier such as silicone, or an additive.

Method of manufacturing ascon composition

The method for preparing the circulating room temperature ascon composition according to one embodiment of the present invention may include a step of mixing the aggregate, filler, phase change material (PCM), cement, asphalt and water to prepare a mixture.

Specifically, aggregates, fillers, phase change materials (PCM), cement, asphalt, and water are mixed according to the content of the present invention.

In the present invention, by including asphalt applicable at room temperature, it is possible to apply a flash point of various phase change materials (PCM) because heating is not required, so that the holding temperature of the mixture can be lowered and the energy cost can be reduced. The heated mixture is used for packaging of roads and the like through the storing and discharging steps.

Hereinafter, the configuration and operation of the present invention will be described in more detail with reference to preferred embodiments of the present invention. It is to be understood, however, that the same is by way of illustration and example only and is not to be construed in a limiting sense.

The contents not described here are sufficiently technically inferior to those skilled in the art, and a description thereof will be omitted.

Example

4.52 parts by weight of slaked lime, 0.27 parts by weight of a first phase change material having a phase transition temperature of 22.5 DEG C, 0.18 part by weight of a second phase change material having a phase transition temperature of 31.46 DEG C, 0.73 part by weight of portland cement, 3.3 parts by weight of SS (C) -1h) and 3.3 parts by weight of water were thoroughly mixed to prepare a circulating room temperature ascon composition. (See M5 in Fig. 1)

i) SSPCM (Shape-stabilized PCM) was applied to the first phase change material. Specifically, n-octadecane, a paraffin PCM, and exfoliated graphite nanoplatelets (xGnP), a porous material, were prepared by vacuum impregnation as follows.

SSPCM (Shpae-stabilized PCM) was prepared by impregnating a pure PCM in a vacuum state with a porous material as a supporting material (vacuum impregnation method). Specifically, xGnP, a porous material, is dried at 105 ° C for 12 hours, and the dried xGnP is placed in an Erlenmeyer flask. In order to make the inside of the Erlenmeyer flask vacuum, the vacuum device is operated so that the pressure of the pores of xGnP is relatively negative (-70 cmHg). Liquid n-octadecane is added until all xGnP is locked and agitated at 1,000 rpm for 2 hours. Thereafter, the non-impregnated n-octadecane is removed through a vacuum filter process, followed by high-temperature drying (80 ° C) for 12 hours and drying at room temperature (23 ° C) for 24 hours. Finally, SSPCM having a diameter of 1.18 mm to 2.36 mm was prepared through grinding. The SSPCM thus prepared had a melting point of 27.5 ° C and a freezing point of 22.5 ° C.

ii) Microencapsulated PCM (MPCM) was applied to the second phase change material used in the above example. Specifically, RT31 produced by Rubitherm was supplied, and RT31 was applied with PCM as a core material, MPCM made from a shell material. The MPCM had a melting point of 31.5 ° C and a freezing point of 32.05 ° C.

iii) The aggregate was composed of 30 wt% of a new aggregate having a particle diameter of 20 mm to 30 mm and 25 wt% of a recycled aggregate having a particle diameter of 10 mm to 19 mm and 45 wt% of a recycled aggregate having a particle diameter of 3 mm to 9 mm.

Comparative Example

A circulating room temperature asconic composition was prepared in the same manner as in Example except that the first and second phase transition materials were not included. (See M10 in Fig. 1)

Experimental Example

(1) The circulating room-temperature ascon composition of the above Examples and Comparative Examples was applied to a specific area of Incheon at 8 cm in summer, and the maximum surface temperature was measured and shown in a graph in FIG.

(2) The circulating room temperature ascon composition of the above Examples and Comparative Examples was applied to a specific area of Ulsan at 8 cm in summer, and the maximum surface temperature was measured and shown in a graph in FIG.

As shown in FIGS. 2 and 3, the circulating room temperature ascon composition of the present invention is excellent in the heat storage effect, whereas the comparative example not containing the phase transition material (PCM) has no heat storage effect, Which is higher than the circulating room temperature ascon composition of the present invention by 0.8 DEG C or more.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the embodiments described above are in all respects illustrative and not restrictive.

Claims (6)

With respect to 100 parts by weight of the aggregate,
1 to 10 parts by weight of a filler;
0.1 to 0.45 parts by weight of a phase change material (PCM);
0.01 to 2 parts by weight of cement;
1 to 10 parts by weight of asphalt;
6 to 15 parts by weight of slag balls:
1 to 10 parts by weight of water,
Wherein the phase change material (PCM) comprises 50 to 70 wt% of a first phase change material having a phase transition temperature of 18 to 30 DEG C and 30 to 50 wt% of a second phase change material having a phase transition temperature of 30 DEG C or more and 40 DEG C or less, Composition.
delete delete The method according to claim 1,
Wherein the composition further comprises 0.1 to 2 parts by weight of an anti-peeling agent.
5. The method of claim 4,
Wherein the phase change material (PCM) and the anti-peeling agent are contained in a weight ratio of 0.5: 1 to 2: 1.
delete

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