CN112794677B - Modified emulsified asphalt concrete - Google Patents
Modified emulsified asphalt concrete Download PDFInfo
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- CN112794677B CN112794677B CN202110289657.4A CN202110289657A CN112794677B CN 112794677 B CN112794677 B CN 112794677B CN 202110289657 A CN202110289657 A CN 202110289657A CN 112794677 B CN112794677 B CN 112794677B
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- 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
- 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
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The invention provides a modified emulsified asphalt concrete. The modified emulsified asphalt concrete comprises the following components in percentage by mass: 4 to 5 percent of asphalt, 5 to 7 percent of slag powder, 40 to 50 percent of fine aggregate, 40 to 50 percent of coarse aggregate and 0.2 to 0.8 percent of anti-stripping agent; the asphalt is SBR II-A type modified asphalt, the fine aggregate is machine-made sand with the thickness of 0-4.75 mm, the coarse aggregate is crushed stone with the thickness of 4.75-9.5 mm and crushed stone with the thickness of 9.5-16 mm, and the doping amount of the crushed stone with the thickness of 4.75-9.5 mm is higher than that of the crushed stone with the thickness of 9.5-16 mm. The HY-1 type anti-stripping agent is added into the modified emulsified asphalt concrete, so that the adhesion between asphalt and aggregate can be increased, and the possibility of forming oil and pitted surfaces on the pavement is reduced; by using the SBR II-A type modified asphalt, the influence of the plateau day and night temperature difference on the asphalt pavement can be reduced, and shrinkage cracks formed on the asphalt pavement are reduced or avoided.
Description
Technical Field
The invention belongs to the technical field of road pavement construction, and particularly relates to modified emulsified asphalt concrete.
Background
The asphalt concrete is widely used in pavement engineering of construction projects, and has the advantages of smooth surface, no joint, comfortable driving, small vibration, low noise, wear resistance, no dust emission, easy cleaning, short construction period, simple and convenient maintenance and easy regeneration and utilization, etc. Due to severe environmental conditions of large day and night temperature difference, extremely strong ultraviolet rays, much and concentrated precipitation, mixed rain and snow, hail and the like in plateau areas, a series of diseases such as oil spreading, pitted surface, shrinkage cracks and the like are easy to occur. The road surface is irradiated by sunshine at noon, the high temperature can cause the free asphalt on the road surface to be heated and expanded and move upwards to form the damage of road surface oil bleeding, and the oil bleeding can cause the road surface to be slippery, thereby forming serious threats to the driving safety, particularly rainy days. And the bituminous concrete is in the surface course on road surface, directly receives the influence of temperature variation, and the difference in temperature can make the bituminous surface layer produce inflation or shrinkage deformation, because bituminous pavement does not have the shrinkage joint, so this kind of deformation can receive the frictional resistance of basic unit to the road surface and the unlimited continuous plate body in road surface to the constraint effect of shrinkage deformation, makes the inside tensile stress that produces of bituminous surface course, when the abrupt temperature drop causes this kind of tensile stress to exceed the ultimate tensile strength that bituminous concrete has, the road surface just will appear the crack to release stress. Particularly, in plateau areas, the temperature difference between day and night is large, so that more and more serious low-temperature cracks are caused.
In conclusion, the problems of asphalt pavement oil spreading, pitted surface, shrinkage cracks and the like are effectively solved, and the key points of safety of road travelers and pavement maintenance cost saving are concerned.
Disclosure of Invention
The invention aims to provide modified emulsified asphalt concrete, which can have a more durable road pavement aiming at severe environments in plateau areas and effectively solve the problems of asphalt pavement oil bleeding, pitted surface, shrinkage cracks and the like.
The purpose of the invention is realized by the following technical scheme:
the modified emulsified asphalt concrete comprises the following components in percentage by mass: 4 to 5 percent of asphalt, 5 to 7 percent of slag powder, 40 to 50 percent of fine aggregate, 40 to 50 percent of coarse aggregate and 0.2 to 0.8 percent of anti-stripping agent;
the asphalt is SBR II-A type modified asphalt, the fine aggregate is machine-made sand with the thickness of 0-4.75 mm, the coarse aggregate is crushed stone with the thickness of 4.75-9.5 mm and crushed stone with the thickness of 9.5-16 mm, and the doping amount of the crushed stone with the thickness of 4.75-9.5 mm is higher than that of the crushed stone with the thickness of 9.5-16 mm.
In the modified emulsified asphalt concrete, the SBR II-A type modified asphalt can more effectively deal with the influence of the plateau day and night temperature difference on an asphalt pavement, improve the low-temperature cracking resistance and the high-temperature rutting resistance, and effectively reduce or avoid the shrinkage crack of the asphalt pavement. The mineral powder plays a role in filling the asphalt mixture, and aims to reduce the gaps of the asphalt concrete, and the mineral powder and the asphalt form asphalt mucilage together, so that the strength and the stability of the asphalt concrete are improved. Aggregate is the structural framework of asphalt concrete, and its physical and chemical properties have very big influence to asphalt concrete's constructability and working property, and coarse aggregate promotes asphalt concrete's wearability, compressive strength, and fine aggregate is used for filling the gap, makes asphalt concrete more closely knit.
Further, the oilstone ratio of the SBR II-A type modified asphalt is 4-5%.
Further, the anti-stripping agent is an HY-1 type anti-stripping agent. The HY-1 type anti-stripping agent can increase the adhesion between asphalt and asphalt, improve the water damage resistance and thermal aging resistance of asphalt concrete, reduce the possibility of oil bleeding and pitted surface damage on a road surface, effectively prolong the service life of the road surface, and reduce or avoid the economic loss of road surface maintenance caused by the oil bleeding and pitted surface damage.
The modified emulsified asphalt concrete comprises the following components in percentage by mass: 4.6% of asphalt, 6% of slag powder, 42% of fine aggregate, 47% of coarse aggregate and 0.4% of anti-stripping agent;
the asphalt is SBR II-A type modified asphalt, the fine aggregate is machine-made sand with the thickness of 0-4.75 mm, the coarse aggregate is crushed stone with the thickness of 4.75-9.5 mm and crushed stone with the thickness of 9.5-16 mm, wherein the doping amount of the crushed stone with the thickness of 4.75-9.5 mm is 25%, and the doping amount of the crushed stone with the thickness of 9.5-16 mm is 22%.
The modified emulsified asphalt concrete comprises the following components in percentage by mass: 4.4% of asphalt, 7% of slag powder, 43% of fine aggregate, 45% of coarse aggregate and 0.6% of anti-stripping agent;
the asphalt is SBR II-A type modified asphalt, the fine aggregate is machine-made sand with the thickness of 0-4.75 mm, the coarse aggregate is crushed stone with the thickness of 4.75-9.5 mm and crushed stone with the thickness of 9.5-16 mm, wherein the doping amount of the crushed stone with the thickness of 4.75-9.5 mm is 24%, and the doping amount of the crushed stone with the thickness of 9.5-16 mm is 21%.
The modified emulsified asphalt concrete comprises the following components in percentage by mass: 4.7% of asphalt, 5% of slag powder, 42% of fine aggregate, 48% of coarse aggregate and 0.3% of anti-stripping agent;
the asphalt is SBR II-A type modified asphalt, the fine aggregate is machine-made sand with the thickness of 0-4.75 mm, the coarse aggregate is crushed stone with the thickness of 4.75-9.5 mm and crushed stone with the thickness of 9.5-16 mm, wherein the doping amount of the crushed stone with the thickness of 4.75-9.5 mm is 25%, and the doping amount of the crushed stone with the thickness of 9.5-16 mm is 23%.
Compared with the prior art, the invention has the following beneficial effects:
the existing common asphalt concrete is easy to generate a series of diseases such as oil spreading, pitted surface, shrinkage cracks and the like due to severe environmental conditions such as large day and night temperature difference, extremely strong ultraviolet ray, much and concentrated precipitation, mixed rain and snow, hail and the like in a plateau area. According to the modified emulsified asphalt concrete, the HY-1 type anti-stripping agent is added, so that the adhesion between asphalt and aggregates can be increased, the water damage resistance and the thermal aging resistance of the asphalt concrete are improved, the possibility of forming the hazards of oil bleeding and pitted surface on a pavement is reduced, the service life of the pavement can be effectively prolonged, and the economic loss of pavement maintenance caused by the hazards of oil bleeding and pitted surface is reduced or avoided; by using the SBR II-A type modified asphalt, the influence of the day and night temperature difference of the plateau on the asphalt pavement can be more effectively coped with, the low-temperature cracking resistance and the high-temperature rutting resistance are improved, and the shrinkage cracks of the asphalt pavement are effectively reduced or avoided.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The modified emulsified asphalt concrete of the embodiment comprises the following components in percentage by mass: 4.6% of asphalt, 6% of slag powder, 42% of fine aggregate, 47% of coarse aggregate and 0.4% of anti-stripping agent.
The asphalt is SBR II-A type modified asphalt (the oil-stone ratio is 4.8 percent), the fine aggregate is machine-made sand of 0-4.75 mm, the coarse aggregate is crushed stone of 4.75-9.5 mm and crushed stone of 9.5-16 mm, the doping amount of the crushed stone of 4.75-9.5 mm is 25 percent, the doping amount of the crushed stone of 9.5-16 mm is 22 percent, and the anti-stripping agent is HY-1 type anti-stripping agent.
And heating, drying, sieving, weighing and mixing the components to obtain the modified emulsified asphalt concrete of the embodiment.
Example 2
The modified emulsified asphalt concrete of the embodiment comprises the following components in percentage by mass: 4.4% of asphalt, 7% of slag powder, 43% of fine aggregate, 45% of coarse aggregate and 0.6% of anti-stripping agent.
The asphalt is SBR II-A type modified asphalt (the oil-stone ratio is 4.6 percent), the fine aggregate is machine-made sand of 0-4.75 mm, the coarse aggregate is crushed stone of 4.75-9.5 mm and crushed stone of 9.5-16 mm, the doping amount of the crushed stone of 4.75-9.5 mm is 24 percent, the doping amount of the crushed stone of 9.5-16 mm is 21 percent, and the anti-stripping agent is HY-1 type anti-stripping agent.
And heating, drying, sieving, weighing and mixing the components to obtain the modified emulsified asphalt concrete of the embodiment.
Example 3
The modified emulsified asphalt concrete of the embodiment comprises the following components in percentage by mass: 4.7% of asphalt, 5% of slag powder, 42% of fine aggregate, 48% of coarse aggregate and 0.3% of anti-stripping agent.
The asphalt is SBR II-A type modified asphalt (the oil-stone ratio is 4.9 percent), the fine aggregate is machine-made sand with the thickness of 0-4.75 mm, the coarse aggregate is broken stone with the thickness of 4.75-9.5 mm and broken stone with the thickness of 9.5-16 mm, wherein the doping amount of the broken stone with the thickness of 4.75-9.5 mm is 25 percent, and the doping amount of the broken stone with the thickness of 9.5-16 mm is 23 percent.
And heating, drying, sieving, weighing and mixing the components to obtain the modified emulsified asphalt concrete of the embodiment.
Comparative example 1
The asphalt concrete of the comparative example uses common emulsified asphalt and comprises the following components in percentage by mass:
4.6 percent of emulsified asphalt (the oil-stone ratio is 4.8 percent), 6 percent of slag powder and 42 percent of machine-made sand with the thickness of 0 to 4.75 mm; 25% of 4.75-9.5 mm gravel; 22 percent of 9.5-16 mm broken stone and 0.4 percent of HY-1 type anti-stripping agent.
And heating and drying the components, sieving, weighing and mixing to obtain the modified emulsified asphalt concrete of the comparative example.
Comparative example 2
The asphalt concrete of the comparative example uses common emulsified asphalt without being doped with an anti-stripping agent, and comprises the following components in percentage by mass:
4.6 percent of emulsified asphalt (the oil-stone ratio is 4.8 percent) and 6 percent of slag powder; 42 percent of machine-made sand with the thickness of 0 to 4.75 mm; 25% of 4.75-9.5 mm gravel; 22 percent of 9.5-16 mm macadam.
And heating and drying the components, sieving, weighing and mixing to obtain the modified emulsified asphalt concrete of the comparative example.
Comparative example 3
The asphalt concrete of the comparative example is not doped with the anti-stripping agent, and comprises the following components in percentage by mass:
4.6 percent of SBR II-A type modified emulsified asphalt (the oil-stone ratio is 4.8 percent), 6 percent of slag powder, 42 percent of machine-made sand with the diameter of 0 to 4.75mm and 25 percent of broken stone with the diameter of 4.75 to 9.5 mm; 22 percent of 9.5-16 mm of broken stone.
And heating, drying, sieving, weighing and mixing the components to obtain the modified emulsified asphalt concrete for the comparative example.
The properties of the modified emulsified asphalt concrete of examples and comparative examples are shown in the following table 1:
TABLE 1 Performance results for modified emulsified asphalt concretes of examples 1-3 and comparative examples 1-3
| Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| Porosity VV (%) | 4.3 | 4.6 | 4.6 | 5.6 | 5.8 | 5.5 |
| Stability MS (KN) | 11.5 | 11.0 | 11.3 | 9.2 | 8.8 | 9.1 |
| Flow value FL (mm) | 3.2 | 3.3 | 3.2 | 2.8 | 2.2 | 2.5 |
| Residual stability MS0 (%) | 82.6 | 81.9 | 81.0 | 77.2 | 70.0 | 72.0 |
| Degree of compaction (%) | 99.7 | 99.2 | 99.3 | 98.8 | 97.4 | 98.2 |
By contrast, in the examples, after the SBR II-A type modified asphalt is used and the anti-stripping agent is added, the void ratio is obviously reduced, the stability is higher, the residual stability is higher, the compaction degree is more compact, the thermal aging resistance and the water damage resistance of the asphalt concrete are obviously improved, and the possibility of forming the oily and pitted damages on the road surface is reduced. The service life of the pavement can be more effectively prolonged, and the economic loss of pavement maintenance caused by the harm of oil bleeding and pitted surface is reduced or avoided; the influence of the day and night temperature difference of the plateau on the asphalt pavement can be more effectively coped with, the low-temperature cracking resistance and the high-temperature rutting resistance are improved, and the shrinkage cracks of the asphalt pavement are effectively reduced or avoided.
The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the invention, but rather, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (4)
1. The modified emulsified asphalt concrete is characterized by comprising the following components in percentage by mass: 4 to 5 percent of asphalt, 5 to 7 percent of slag powder, 40 to 50 percent of fine aggregate, 40 to 50 percent of coarse aggregate and 0.2 to 0.8 percent of anti-stripping agent;
the asphalt is SBR II-A type modified asphalt, the fine aggregate is machine-made sand with the thickness of 0-4.75 mm, the coarse aggregate is broken stone with the thickness of 4.75-9.5 mm and broken stone with the thickness of 9.5-16 mm, and the doping amount of the broken stone with the thickness of 4.75-9.5 mm is higher than that of the broken stone with the thickness of 9.5-16 mm; wherein the asphalt-stone ratio of the SBR II-A type modified asphalt is 4-5%, and the anti-stripping agent is HY-1 type anti-stripping agent.
2. The modified emulsified asphalt concrete according to claim 1, which comprises the following components in percentage by mass: 4.6% of asphalt, 6% of slag powder, 42% of fine aggregate, 47% of coarse aggregate and 0.4% of anti-stripping agent; the asphalt is SBR II-A type modified asphalt, the fine aggregate is machine-made sand with the thickness of 0-4.75 mm, the coarse aggregate is crushed stone with the thickness of 4.75-9.5 mm and crushed stone with the thickness of 9.5-16 mm, wherein the doping amount of the crushed stone with the thickness of 4.75-9.5 mm is 25%, and the doping amount of the crushed stone with the thickness of 9.5-16 mm is 22%.
3. The modified emulsified asphalt concrete as claimed in claim 1, which comprises the following components in percentage by mass: 4.4% of asphalt, 7% of slag powder, 43% of fine aggregate, 45% of coarse aggregate and 0.6% of anti-stripping agent; the asphalt is SBR II-A type modified asphalt, the fine aggregate is machine-made sand with the thickness of 0-4.75 mm, the coarse aggregate is crushed stone with the thickness of 4.75-9.5 mm and crushed stone with the thickness of 9.5-16 mm, wherein the doping amount of the crushed stone with the thickness of 4.75-9.5 mm is 24%, and the doping amount of the crushed stone with the thickness of 9.5-16 mm is 21%.
4. The modified emulsified asphalt concrete according to claim 1, which comprises the following components in percentage by mass: 4.7% of asphalt, 5% of slag powder, 42% of fine aggregate, 48% of coarse aggregate and 0.3% of anti-stripping agent; the asphalt is SBR II-A type modified asphalt, the fine aggregate is machine-made sand with the thickness of 0-4.75 mm, and the coarse aggregate is broken stone with the thickness of 4.75-9.5 mm and broken stone with the thickness of 9.5-16 mm.
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| CN202110289657.4A CN112794677B (en) | 2021-03-16 | 2021-03-16 | Modified emulsified asphalt concrete |
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| CN202110289657.4A CN112794677B (en) | 2021-03-16 | 2021-03-16 | Modified emulsified asphalt concrete |
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| CN112794677B true CN112794677B (en) | 2022-10-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101012338B (en) * | 2007-02-08 | 2010-05-19 | 青海弘川化工实业有限公司 | SBR modified road bitumen |
| CN101134655A (en) * | 2007-07-31 | 2008-03-05 | 武汉理工大学 | Gneiss asphalt concrete and method for making same |
| KR102011916B1 (en) * | 2019-05-21 | 2019-10-22 | 현원순 | High grade asphalt concrete composition for excellent crack-resistance with rubber powder and constructing methods using the same |
| CN111233376B (en) * | 2020-03-12 | 2022-03-15 | 中交路桥北方工程有限公司 | Asphalt concrete formula suitable for high-altitude cold regions |
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