KR20140002309A - Recycling modified-asphalt concrete using wasted terra alba and wasted tire - Google Patents
Recycling modified-asphalt concrete using wasted terra alba and wasted tire Download PDFInfo
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- KR20140002309A KR20140002309A KR20120070544A KR20120070544A KR20140002309A KR 20140002309 A KR20140002309 A KR 20140002309A KR 20120070544 A KR20120070544 A KR 20120070544A KR 20120070544 A KR20120070544 A KR 20120070544A KR 20140002309 A KR20140002309 A KR 20140002309A
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- waste
- asphalt concrete
- weight
- modified asphalt
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/0481—Other specific industrial waste materials not provided for elsewhere in C04B18/00
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/18—Waste materials; Refuse organic
- C04B18/20—Waste materials; Refuse organic from macromolecular compounds
- C04B18/22—Rubber, e.g. ground waste tires
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/48—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/48—Macromolecular compounds
- C04B41/4853—Epoxides
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Road Paving Structures (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
In the present invention, 100 parts of mixed aggregate of waste asphalt concrete recycled aggregate and general aggregate in a weight ratio of 10:90 to 80:20, 60 to 95 wt% of asphalt, 4.8 to 35 wt% of waste tire powder, and 0.2 to polyphosphoric acid 4 to 12 parts by weight of modified asphalt mixed with 5% by weight, and 0.5 to 10 parts by weight of waste clay, and relates to recycled modified asphalt concrete using waste tire.
Description
The present invention relates to reclaimed modified asphalt concrete using waste clay and waste tires, and to reclaim modified asphalt concrete using waste clay concrete and waste tires. It relates to asphalt concrete.
In general, asphalt concrete pavement is a road paved with asphalt concrete that is obtained by mixing and heating asphalt and aggregate, and is used in highways and the like for traffic of vehicles.
The asphalt concrete pavement is subjected to repeated heavy loads such as frequent vehicle traffic after construction, resulting in cracks, partial damage or irregularities on the pavement. In order to repair the asphalt pavement deformed by cracks, partial breakage, irregularities, etc., it is necessary to crush and remove part of the asphalt concrete that needs to be repaired, and then install and repair the new asphalt concrete in place. Or, the entire reconstruction work is carried out to remove the entire asphalt concrete and pave the new asphalt concrete. In addition, in the case of facility construction such as gas pipes, water and sewage pipes, electric and telephone cables, which are buried underground, work is performed after removing asphalt concrete from the pavement surface of the corresponding area.
As such, waste asphalt concrete generated from some repair work on the pavement, total repair work or facility construction was considered to be unusable, and most of it was landfilled for disposal. This treatment method wastes resources, requires a lot of land and costs for landfilling, and requires new aggregate and asphalt for road construction. To reduce site costs and waste disposal costs, and to recycle resources, Asphalt concrete needs to be recycled and utilized, and many related technologies have been developed and used.
As a method of recycling conventional waste asphalt concrete, there was a method of heating waste asphalt concrete to remove asphalt and use it as aggregate, but this is a method that is toxic gas generated as waste asphalt is removed, causing air pollution and costly method. As a result, a method for recycling waste asphalt from waste asphalt concrete has been developed. Waste asphalt needs to restore the function of asphalt as a binder by restoring the fraction of waste asphalt as organic components are mostly evaporated by long time use.
The present invention has been invented to improve the above problems, by using waste clay and waste tire to increase the oil content while adding modified asphalt, each of the components of the recycled modified asphalt concrete physically and chemically bonded to each other, storage stability The purpose of the present invention is to provide regenerated modified asphalt concrete using the improved alumina and waste tire, which is not different from the general asphalt concrete or improves the properties of regenerated modified asphalt concrete.
In addition, an object of the present invention is to provide recycled modified asphalt concrete using waste clay and waste tires that are environmentally friendly and recycle resources using waste clay.
In the present invention, 100 parts of mixed aggregate of waste asphalt concrete recycled aggregate and general aggregate in a weight ratio of 10:90 to 80:20, 60 to 95 wt% of asphalt, 4.8 to 35 wt% of waste tire powder, and 0.2 to polyphosphoric acid It provides 4 to 12 parts by weight of modified asphalt mixed with 5% by weight, 0.5-10 parts by weight of waste clay, and provides recycled modified asphalt concrete using waste clay and waste tires.
In addition, the waste clay provides a reclaimed modified asphalt concrete using waste clay and waste tire, characterized in that the waste clay is discarded after the purification of plant-based oil or petroleum refining.
In addition, the waste clay provides reclaimed modified asphalt concrete using waste clay and waste tire, characterized in that it contains more than 15% by weight of oil.
In addition, the waste tire powder provides reclaimed modified asphalt concrete using waste clay and waste tire, characterized in that it is used by decuring.
In addition, the mixed aggregate is used as a coarse aggregate 45 ~ 85% by weight, fine aggregate 10 ~ 45% by weight, 5 ~ 10% by weight of the filling material has a flow resistance to provide reclaimed modified asphalt concrete using waste clay and waste tires do.
In addition, by using the mixed aggregate coarse aggregate 70 ~ 90% by weight, fine aggregate 7 ~ 27% by weight, filler 3 ~ 8% by weight to provide a reclaimed modified asphalt concrete using waste clay and waste tire, characterized in that it has a drainage. .
In addition, there is provided a reclaimed modified asphalt concrete package using waste clay and waste tires, wherein the reclaimed modified asphalt concrete is constructed and the asphalt concrete using 0.1 to 5 mm aggregate is packed on the construction surface thereof.
In addition, there is provided a reclaimed modified asphalt concrete package using waste clay and waste tire, characterized in that the above-mentioned reclaimed modified asphalt concrete is applied, and the selected surface is sprayed with acrylic resin, epoxy resin or urethane resin. do.
Reclaimed modified asphalt concrete using waste clay and waste tire according to the present invention uses waste asphalt concrete and waste clay to recycle energy that requires conventional industrial waste as recycled resources, thereby reducing energy and preventing environmental pollution. In addition, the waste asphalt concrete recycled aggregate, which is a waste resource, has excellent performance with almost no difference in physical properties from asphalt concrete manufactured from general aggregate.
The recycled modified asphalt concrete of the present invention has increased resistance to plastic deformation, low temperature cracking and fatigue cracking to increase the life of the road and reduce the noise to solve environmental problems such as noise and urban heat islands. Has the effect of providing.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as to avoid obscuring the subject matter of the present invention.
As used herein, the terms 'about', 'substantially', and the like, are used at, or in close proximity to, numerical values when manufacturing and material tolerances inherent in the stated meanings are set forth, and an understanding of the present invention may occur. Accurate or absolute figures are used to help prevent unscrupulous infringers from unlawful use of the disclosure.
The present invention relates to regenerated modified asphalt concrete using waste clay and waste tires.
The waste asphalt concrete recycled aggregate used in the present invention is collected and manufactured while removing the existing paved asphalt concrete while repacking the paved asphalt concrete.
Current methods for producing such waste asphalt concrete as recycled aggregates include crushing waste asphalt concrete and removing waste asphalt components through direct heating, and methods for not removing waste asphalt components through indirect heating.
Waste asphalt concrete recycled aggregate used in the present invention is to use the recycled aggregate that is not removed waste asphalt through indirect heating is used in combination with the general aggregate.
The waste asphalt concrete recycled aggregate and waste aggregate concrete mixed with 4 to 12 parts by weight of modified asphalt and 0.5 to 10 parts by weight of alumina were mixed with 100 aggregates in a mixed aggregate having a weight ratio of 10:90 to 80:20. To produce regenerated modified asphalt concrete.
The waste clay is waste clay that is discarded after refining or petroleum refining of vegetable oil, and it will be preferable to use waste clay that contains 15 to 60 wt% of oil.
The waste clay is discarded after refining or refining petroleum oil, and the clay is also known as white clay and chalk. The main raw materials are kaolinite and halosite. It is widely used for the purification of plant-based materials such as rapeseed oil, soybean oil, corn oil, safflower oil and cottonseed oil, or it is widely used for adsorption purification of petroleum oil.
As mentioned above, the waste clay produced during the refining or petroleum refining process of vegetable oil will contain 10 to 60% oil.
Therefore, since the affinity with the resin component of the oil contained in the petroleum refining asphalt and waste clay, the waste soil soil is mixed with the waste asphalt of waste asphalt concrete and penetrates into the waste asphalt to minimize the physical properties of the waste asphalt (asphalt). Will be restored.
In addition, the clay component has a composition and particle distribution similar to that of stone powder and the like used as asphalt aggregate, so that it can replace the aggregate of asphalt.
As the waste clay used in the present invention, it will be preferable to use waste clay containing 15% by weight or more of oil.
The modified asphalt is a modified asphalt with improved durability and adhesive performance by mixing 60 to 95% by weight asphalt, 4.8 to 35% by weight of the de-cured rubber powder, 0.2 to 5% by weight polyphosphoric acid.
The waste tire powder can be used to prepare a de-cured rubber powder by grinding the waste tire in a powder state and heated to 50 ~ 130 ℃ but by crushing the rubber to a certain size after the first crushed rubber to give a pressure to the rubber powder by the shear force The mechanical pressure and thermal energy are preferably accumulated and used to prepare the decured rubber powder through the explosion and pulverization by the internal energy of the injected material.
The decured rubber powder produced by pressurization at the same time as heating is chemically activated at the surface of the particle size, and the state of the particle surface forms a microporous pore structure, thereby maximizing the surface area, resulting in chemical reactivity and physical adsorption by micropores and Improved chemical adsorption (chemisorption) is easily and strongly combined with asphalt and polyphosphoric acid to improve the physical properties of the asphalt than conventional rubber powder.
The waste tire powder is suitable for the size of 0.03 ~ 3mm in the de-curing and crushing process, if less than 0.03mm, the production cost is increased and not efficient. Carbon black, antioxidants, and the like added to increase the physical properties of the asphalt, thereby increasing the performance of the modified asphalt of the present invention.
In general, when used waste tire powder is added to asphalt, waste tire powder needs long-term aging process to modify the physical properties of asphalt, but decured waste tire powder is used for physical adsorption and chemical Adsorption (chemisorption) is improved, eliminating the need for a scouring process, thereby reducing the production time of the modified asphalt.
The amount of the decured rubber powder is preferably 1 to 35% by weight, preferably 3 to 29% by weight, and less than 3% by weight to 60 to 95% by weight of asphalt. Physical properties are reduced. When decured rubber powder is added to asphalt and mixed for 30 to 80 minutes at 140 to 200 ° C, the aromatic component of asphalt is swelled into the decured rubber powder to form a physical bond, and the penetrated aromatic component and polyphosphoric acid are combined ( coupling) further enhances the bond between the de-cured rubber powder and asphalt.
Asphalt used in the present invention is composed of asphaltenes (asphaltene), maltene (maltene), resin (resin) and the asphaltenes and resin components on the maltenes are present in a state of agglomeration with each other. Malten is divided into non-osmotic materials of aromatic structure and osmotic materials. Aromatic materials account for 40-65% of the total asphalt content and exist as a dark brown liquid. Osmotic materials are alkyl naphna and alkyl-aromatic structures. It is composed of components and is involved in viscosity and flow. Asphaltene is an aromatic material containing a little nitrogen, sulfur and oxygen. It is involved in viscosity and softening point, and resin component affects adhesion and ductility.
The polyphosphoric acid (PPA) used in the present invention is a condensed acid produced by concentrating orthophosphoric acid or hydrating phosphorus pentoxide [H n +2 P n O 3n +1 ] or It is represented by [H (HPO 3 ) n OH].
Commercially available polyphosphoric acid is specified by the P 2 O 5 or H 3 PO 4 equivalent expressed in percent relative to the weight of the acid. Thus there is a so-called superphosphate classification, its H 3 PO 4 equivalent is greater than 100. In the present invention, a condensation acid of 105 to 120% can be used.
When the polyphosphoric acid is added to the asphalt and the decured rubber powder, substances such as nitrogen (N), oxygen (O) and sulfur (S) in which the H + ions of the polyphosphoric acid are connected to the aromatic chain in the asphalt and the decured rubber powder After reaction with, PPA - ion and aromatic chain are coupled to induce dispersion of asphaltene and decured rubber powder, which increases the softening point and viscosity of asphalt. The reaction mechanism of polyphosphoric acid and asphalt is shown in FIG. 1, and the dispersion | distribution of asphaltene and a dehardening rubber powder by polyphosphoric acid is shown in FIG.
Therefore, the polyphosphoric acid acts as a coupling agent between the de-cured rubber powder and asphalt added to improve the physical properties of the asphalt, thereby improving the bonding strength, uniform dispersion, and the like. The modified asphalt of the present invention exhibits high viscosity and increases storage stability. .
The amount of the polyphosphoric acid (PPA) is preferably 0.01% by weight or more, preferably 0.2-5% by weight, based on 60 to 95% by weight of asphalt. If the amount is less than 0.2% by weight, the use effect is insignificant, and if the amount is more than 5% by weight, excessive viscosity increase may occur, which may be vulnerable to low temperature cracking.
As described above, the modified asphalt prepared by mixing asphalt, decured rubber powder, and polyphosphoric acid has excellent properties than the conventional modified asphalt because each component organically acts on each other.
By adjusting the aggregate particle size of the mixed aggregate of reclaimed modified asphalt concrete using waste clay and waste tire according to the present invention, it is possible to produce a flow-resistant or drained regenerated modified asphalt concrete.
The flow-resistant regenerated modified asphalt concrete may be composed of mixed aggregate 45 to 85% by weight of coarse aggregate, 10 to 45% by weight of fine aggregate, 5 to 10% by weight of filling material to produce flow-resistant regenerated modified asphalt concrete.
In addition, the drainage regeneration modified asphalt concrete may be composed of mixed aggregate 70 ~ 90% by weight coarse aggregate, 7 ~ 27% by weight fine aggregate, 3 ~ 8% by weight filler aggregates can be produced regeneration modified asphalt concrete.
In addition, synthetic fibers such as polypropylene fibers, polyester fibers, acrylic fibers, cellulose fibers, carbon fibers, glass fibers, and aramid fibers may be added to further improve the physical properties of the reclaimed modified asphalt concrete. The amount of the synthetic fibers added is preferably 0.01 to 0.2 parts by weight of strength reinforcing fiber mixed with one or two or more of the synthetic fibers to 100 parts by weight of regenerated modified asphalt concrete.
In addition, FT wax (wax manufactured by Fischer-Tropsch process) having C 45 to C 100 (45 to 100 carbon atoms) may be added as another method for further improving the physical properties of the regenerated modified asphalt concrete. . FT wax has longer carbon chain than paraffin wax in asphalt, which improves brittleness and viscosity behavior of modified asphalt. 2 parts by weight, preferably 0.1 to 0.5 parts by weight is suitable. If less than 0.1 parts by weight, the effect is insignificant. If it is more than 0.5 parts by weight, the temperature is too high.
Recycling modified asphalt concrete containing the waste asphalt concrete of the present invention as described above to minimize the effect of the deformation, and to minimize the detachment and cracking of aggregate to maximize the resistance to plastic deformation containing the waste asphalt concrete Asphalt concrete using 0.1-5 mm aggregate may be packaged on the reclaimed modified asphalt concrete construction surface to form a reclaimed modified asphalt concrete package containing waste asphalt concrete.
The 0.1 to 5 mm aggregate is preferably used 5 mm SMA particle size aggregate, it is preferable to be packed with a coating thickness of 1 to 5 cm.
Reclaimed modified asphalt concrete pavement containing waste asphalt concrete coated with asphalt concrete using 0.1 to 5 mm aggregate is excellent in resistance to vibration and shock, and has high durability and dynamic stability, thereby reducing maintenance costs.
In addition, as soon as the reclaimed modified asphalt concrete is applied, the surface of the asphalt concrete, which is a surface protection agent, is used to solve the problem of sticking of the surface and adhesion of foreign matters, thereby preventing the voids of the asphalt, and to reinforce the surface strength and preserve the color of the reclaimed modified asphalt concrete. The acrylic resin or epoxy resin or urethane resin can be sprayed.
It is preferable that the surface protectant is sprayed in an amount of 0.4 to 0.8 L per 1 m 2 selected from the above acrylic resin for asphalt concrete, epoxy resin, and urethane resin.
Claims (8)
The waste clay is reclaimed modified asphalt concrete using waste clay and waste tires, characterized in that the waste soil is discarded after refining or petroleum refining of vegetable oil.
The waste clay is recycled modified asphalt concrete using waste clay and tires, characterized in that it contains more than 15% by weight of oil.
The waste tire powder is recycled modified asphalt concrete using waste clay and waste tire, characterized in that it is used by decuring.
The mixed aggregate 45 ~ 85% by weight coarse aggregate, 10 ~ 45% by weight of the aggregate, 5 ~ 10% by weight of the filling material is characterized in that it has fluid resistance, reclaimed modified asphalt concrete using waste clay and waste tires.
70 to 90% by weight of the coarse aggregate, 7 to 27% by weight of the aggregate, 3 to 8% by weight of the filling material, characterized in that it has a drainage, reclaimed modified asphalt concrete using waste clay and waste tires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20120070544A KR20140002309A (en) | 2012-06-29 | 2012-06-29 | Recycling modified-asphalt concrete using wasted terra alba and wasted tire |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20120070544A KR20140002309A (en) | 2012-06-29 | 2012-06-29 | Recycling modified-asphalt concrete using wasted terra alba and wasted tire |
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| Publication Number | Publication Date |
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| KR20140002309A true KR20140002309A (en) | 2014-01-08 |
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| KR20120070544A KR20140002309A (en) | 2012-06-29 | 2012-06-29 | Recycling modified-asphalt concrete using wasted terra alba and wasted tire |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160367195A1 (en) * | 2015-06-19 | 2016-12-22 | Samsung Electronics Co., Ltd. | Electronic device for measuring information regarding human body and operating method thereof |
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- 2012-06-29 KR KR20120070544A patent/KR20140002309A/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160367195A1 (en) * | 2015-06-19 | 2016-12-22 | Samsung Electronics Co., Ltd. | Electronic device for measuring information regarding human body and operating method thereof |
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