CN114455873B - Acidic aggregate performance improving device and method based on surface treatment - Google Patents
Acidic aggregate performance improving device and method based on surface treatment Download PDFInfo
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- CN114455873B CN114455873B CN202210048135.XA CN202210048135A CN114455873B CN 114455873 B CN114455873 B CN 114455873B CN 202210048135 A CN202210048135 A CN 202210048135A CN 114455873 B CN114455873 B CN 114455873B
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1018—Coating or impregnating with organic materials
- C04B20/1029—Macromolecular compounds
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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
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- 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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Abstract
The invention discloses an acidic aggregate performance improving device based on surface treatment and an aggregate improving method, wherein the acidic aggregate performance improving device comprises an upper-layer left-side conveyor belt, an aggregate bin, a first wax emulsion bin and a first papermaking sludge ash bin are sequentially arranged above the upper-layer left-side conveyor belt in the conveying direction, an upper-layer right-side conveyor belt is arranged at the conveying tail end of the upper-layer left-side conveyor belt, a lower-layer conveyor belt is arranged below the upper-layer right-side conveyor belt, a stirrer is arranged at the conveying tail end of the lower-layer conveyor belt, the stirrer is arranged on a weighing test table, and a second wax emulsion bin and a second papermaking sludge ash bin are sequentially arranged between the upper-layer right-side conveyor belt and the lower-layer conveyor belt in the conveying direction of the lower-layer conveyor belt. The invention solves the problem of high cost of manufacturing the asphalt concrete in the area lacking the alkaline stone.
Description
Technical Field
The invention belongs to the technical field of modification of building materials of hydraulic and hydroelectric engineering, relates to a surface treatment-based acidic aggregate performance improving device, and further relates to a method for improving acidic aggregates by adopting the device.
Background
The asphalt is a black brown complex mixture composed of hydrocarbons with different molecular weights and nonmetal derivatives thereof, is a high-viscosity black organic liquid, can chemically react with alkaline substances, has hydrophobicity, and is widely applied to road construction at present.
The asphalt concrete has good anti-seepage and deformation-adapting capabilities, and is convenient to repair and construct and maintain, so that in the construction process of the hydraulic dam, if local anti-seepage materials are lacked, an asphalt concrete core wall can be arranged in the middle of the dam body to improve the anti-seepage performance of the dam.
When asphalt concrete is prepared, water-insoluble products can be generated in the hot mixing process of asphalt and alkaline stone, so that the structure of the asphalt concrete is more stable, and the alkaline stone is often the preferred material for preparing the asphalt concrete. However, when the location of the dam body is lack of alkaline stone, the use of the alkaline stone can greatly increase the engineering cost, but the prior common method of adding slaked lime or saturated lime water has limited improvement on the adhesiveness of acidic stone and asphalt, and asphalt concrete prepared by the method is easy to cause the falling of an asphalt film under the action of moisture, and cannot play a role in preventing seepage. Based on the principle that materials are selected from near to far, are good before bad, are suitable according to local conditions and are locally obtained in the hydraulic engineering construction, the invention provides the method for modifying the acidic stone material, which greatly saves the engineering cost while ensuring the engineering quality. It is worth mentioning that the method can also be used for the modification of neutral stone.
The sludge and ash powder generated after the papermaking wastewater is treated by treatment facilities become new pollution sources, most of the papermaking sludge and ash are subjected to landfill treatment except part of the papermaking sludge and ash are subjected to secondary utilization, and the papermaking sludge needs to be buried in more than 70 mu of land every year at present, so that new pollution is caused, and resource waste is also caused. The invention uses the papermaking sludge ash as the anti-stripping agent, and can realize the reutilization of waste resources.
Disclosure of Invention
The invention aims to provide a surface treatment-based acidic aggregate performance improving device, which solves the problem that the existing area lacking alkaline stone has high cost for manufacturing asphalt concrete.
Another object of the present invention is to provide a method for lifting acidic aggregates using the above apparatus.
The technical scheme includes that the acidic aggregate performance improving device based on surface treatment comprises an upper-layer left-side conveying belt, an aggregate bin, a first wax emulsion bin and a first papermaking sludge ash bin are sequentially arranged above the upper-layer left-side conveying belt in the conveying direction, an upper-layer right-side conveying belt is arranged at the conveying tail end of the upper-layer left-side conveying belt, a lower-layer conveying belt is arranged below the upper-layer right-side conveying belt, a stirrer is arranged at the conveying tail end of the lower-layer conveying belt, the stirrer is arranged on a weighing test bed, and a second wax emulsion bin and a second papermaking sludge ash bin are sequentially arranged between the upper-layer right-side conveying belt and the lower-layer conveying belt in the conveying direction of the lower-layer conveying belt.
The present invention is also characterized in that,
and a valve is arranged at the outlet of the aggregate bin.
The outlet of the first wax emulsion bin is provided with a spray head, and a valve is arranged above the spray head.
A filter screen is arranged in the first paper-making sludge ash bin, and a valve is arranged at the outlet of the first paper-making sludge ash bin.
And a nozzle is arranged at the outlet of the second wax emulsion bin, and a valve is arranged above the nozzle.
A filter screen is arranged in the second paper-making sludge ash bin, and a valve is arranged at the outlet of the second paper-making sludge ash bin.
And flowmeters are arranged on the first wax emulsion bin, the first papermaking sludge ash bin, the second wax emulsion bin and the second papermaking sludge ash bin.
The invention adopts another technical scheme that a method for lifting acid aggregate by adopting an acid aggregate performance lifting device based on surface treatment specifically comprises the following steps: starting an upper left conveyor belt, an upper right conveyor belt and a lower conveyor belt, opening aggregate bins to enable aggregates to be laid on the upper left conveyor belt, then opening a first wax emulsion bin and a first papermaking sludge ash bin in sequence to enable wax emulsion and papermaking sludge ash to be uniformly scattered on the aggregate surface to obtain mixed aggregates, enabling the mixed aggregates to be conveyed onto the upper right conveyor belt and then onto the lower conveyor belt, opening a second wax emulsion bin and a second papermaking sludge ash bin in sequence to enable wax emulsion and papermaking sludge ash to be uniformly scattered on the mixed aggregates to obtain final aggregates, conveying the final aggregates to a stirrer through the lower conveyor belt, weighing the quality of the final aggregates in the stirrer by a weighing test bench, stopping the upper left conveyor belt, the upper right conveyor belt and the lower conveyor belt after reaching the designed quality, closing the aggregate bins, the first wax emulsion bin, the first papermaking sludge ash bin, the second wax emulsion bin and the second papermaking sludge ash bin, starting the stirrer to finally stir the aggregates, taking out and naturally airing the aggregates after finishing to obtain modified aggregates.
The present invention is also characterized in that,
the conveying speed of the upper layer left side conveyor belt is 0.5m/s, and the conveying speed of the upper layer right side conveyor belt and the lower layer conveyor belt is 0.5-3.5m/s.
The discharge flow rates of the first wax emulsion bin, the first papermaking sludge ash bin, the second wax emulsion bin and the second papermaking sludge ash bin are 100ml/s.
The beneficial effect of the invention is that,
(1) According to the method for improving the acidic aggregate, the adhesiveness of the acidic aggregate and the asphalt is greatly enhanced by wrapping the web of the papermaking sludge ash for the acidic aggregate, the durability and the like of the asphalt concrete are improved, and the use of the acidic aggregate can be saved, so that the problem of aggregate source of the asphalt concrete is greatly solved;
(2) The method for improving the acidic aggregate adopts the papermaking sludge ash to wrap the abdomen, the papermaking sludge belongs to biosolid waste, the papermaking sludge not only contains a large amount of cellulose organic matters and plant nutrients such as nitrogen, phosphorus, potassium and the like, but also contains pathogens and is easy to decay and stink, the papermaking sludge is used as the solid waste, the direct discarding not only can cause environmental pollution, but also can waste resources, and the alkalinity of the papermaking sludge can be processed to be used as an anti-stripping agent;
(3) According to the method for improving the acidic aggregate, the wax emulsion is adopted to moisten the paper-making sludge ash, the wax emulsion is milky and semitransparent liquid, during the concrete curing period, the wax emulsion can prevent water from evaporating too fast, unnecessary surface water evaporation is avoided, the hydration of cement is promoted, and the impermeability and the water resistance of asphalt concrete can be improved by wetting with the wax emulsion;
(4) The acidic aggregate performance improving device based on surface treatment has a simple structure, can control the speed and the flow of raw materials, and is easy to operate.
Drawings
FIG. 1 is a schematic structural diagram of the surface treatment-based acidic aggregate performance improving device of the invention.
In the figure, 1, an aggregate bin, 2, aggregate, 3, a valve, 4, a first wax emulsion bin, 5, wax emulsion, 6, a spray head, 7, a first papermaking sludge ash bin, 8, papermaking sludge ash, 9, a filter screen, 10, an upper layer left side conveyor belt, 11, an upper layer right side conveyor belt, 12, a lower layer conveyor belt, 13, a stirrer, 14, a weighing test bed, 15, a second wax emulsion bin and 16, a second papermaking sludge ash bin are arranged.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention provides an acidic aggregate performance improving device based on surface treatment, which has a structure shown in figure 1 and comprises an upper-layer left-side conveyor belt 10, wherein a bone storage bin 1, a first wax emulsion bin 4 and a first papermaking sludge ash bin 7 are sequentially arranged above the upper-layer left-side conveyor belt 10 according to the conveying direction, a valve 3 is arranged at the outlet of the bone storage bin 1, a spray head 6 is arranged at the outlet of the first wax emulsion bin 4, the valve 3 is arranged above the spray head 6, a filter screen 9 is arranged in the first papermaking sludge ash bin 7, the valve 3 is arranged at the outlet of the first papermaking sludge ash bin 7, an upper-layer right-side conveyor belt 11 is arranged at the conveying tail end of the upper-layer left-side conveyor belt 10, a lower-layer conveyor belt 12 is arranged below the upper-layer right-side conveyor belt 11, and a stirrer 13 is arranged at the conveying tail end of the lower-layer conveyor belt 12, the mixer 1 is arranged on a weighing test bed (14), a second wax emulsion bin 15 and a second papermaking sludge ash bin 16 are sequentially arranged between an upper-layer right-side conveyor belt 11 and a lower-layer conveyor belt 12 according to the conveying direction of the lower-layer conveyor belt 12, a sprayer 6 is arranged at the outlet of the second wax emulsion bin 15, a valve 3 is arranged above the sprayer 6, a filter screen 9 is arranged in the second papermaking sludge ash bin 16, a valve 3 is arranged at the outlet of the second papermaking sludge ash bin 16, a first wax emulsion bin 4, a first papermaking sludge ash bin 7, a second wax emulsion bin 15 and a flowmeter are arranged on the second papermaking sludge ash bin 16, aggregate 2 is filled in the aggregate bin 1, wax emulsion 5 is filled in the first wax emulsion bin 4 and the second wax emulsion bin 15, and papermaking sludge ash 8 is filled in the first papermaking sludge bin 7 and the second papermaking sludge ash bin 16.
The invention provides a method for lifting acidic aggregate by adopting an acidic aggregate performance lifting device based on surface treatment, which comprises the following steps: starting an upper-layer left-side conveyor belt 10, an upper-layer right-side conveyor belt 11 and a lower-layer conveyor belt 12, opening an aggregate bin 1 to enable aggregates to be flatly paved on the upper-layer left-side conveyor belt 10, then opening a first wax emulsion bin 4 and a first papermaking sludge ash bin 7 in sequence to enable wax emulsion and papermaking sludge ash to be uniformly scattered on the surfaces of the aggregates to obtain mixed aggregates, conveying the mixed aggregates until the mixed aggregates are conveyed onto the upper-layer right-side conveyor belt 10 and then fall onto the lower-layer conveyor belt 12, opening a second wax emulsion bin 15 and a second papermaking sludge ash bin 16 in sequence to enable the wax emulsion and the papermaking sludge ash to be uniformly scattered on the mixed aggregates to obtain final aggregates, conveying the final aggregates into a stirrer 13 through the lower-layer conveyor belt 12, weighing the final aggregates in the stirrer 13 by using a weighing test table 14, stopping the upper-layer left-side conveyor belt 10, the upper-layer right-side conveyor belt 11 and the lower-layer conveyor belt 12 after the design quality is reached, closing the aggregate bin 1, the first wax emulsion bin 4, the first papermaking sludge ash bin 7, the second papermaking sludge ash bin 15 and the second papermaking sludge ash bin 16, starting the stirrer 13 to modify the aggregates, and drying the aggregates to obtain the final aggregates.
The transmission speed of the upper layer left side transmission belt 10 is 0.5m/s, and the transmission speed of the upper layer right side transmission belt 11 and the lower layer transmission belt 12 is 0.5-3.5m/s; the discharge flow rates of the first wax emulsion bin 4, the first papermaking sludge ash bin 7, the second wax emulsion bin 15 and the second papermaking sludge ash bin 16 are 100ml/s.
Comparative example
Granite macadam for a certain asphalt concrete dam is taken as an acid aggregate, the asphalt adopts Zhonghai oil No. 70 asphalt, and the acid aggregate is not treated at all.
The adhesion between the acid aggregate and the asphalt is tested according to an aggregate-asphalt adhesion test (boiling method) in the hydraulic asphalt concrete test regulations (DL/T5362-2009), the adhesion between the acid aggregate and the asphalt is evaluated according to the regulations of the hydraulic asphalt concrete test regulations (DL/T5362-2009), and the grade of the adhesion between the aggregate and the asphalt is from good to different: 5. 4, 3, 2, 1 rating.
Example 1
Taking granite broken stone for an asphalt concrete dam as an acidic aggregate, wherein the asphalt adopts medium sea oil No. 70 asphalt, and the acidic aggregate is treated according to the following processes:
step 1, placing the acidic aggregate in a drying device in a laboratory for drying treatment, controlling the temperature at 100-130 ℃ and the time at 2 hours to obtain the dried acidic aggregate, and then placing the aggregate in a crusher for crushing.
And 2, screening the smashed acid aggregate by a sand and stone conveying and screening device to obtain dry acid aggregate particles with the particle sizes of 20-30 mm, 10-20 mm, 5-10 mm and 0-5 mm, and mixing the dry acid aggregate particles with the particle sizes of 20-30 mm, 10-20 mm, 5-10 mm and 0-5 mm according to the weight ratio of 35:32:19:14, uniformly stirring the acidic aggregate particles in parts by weight, and placing the mixture in an aggregate bin.
Starting an upper-layer left-side conveyor belt 10, an upper-layer right-side conveyor belt 11 and a lower-layer conveyor belt 12, opening an aggregate bin 1 to enable aggregates to be flatly paved on the upper-layer left-side conveyor belt 10, then opening a first wax emulsion bin 4 and a first papermaking sludge ash bin 7 in sequence to enable wax emulsion and papermaking sludge ash to be uniformly scattered on the surfaces of the aggregates to obtain mixed aggregates, conveying the mixed aggregates until the mixed aggregates are conveyed onto the upper-layer right-side conveyor belt 10 and then fall onto the lower-layer conveyor belt 12, opening a second wax emulsion bin 15 and a second papermaking sludge ash bin 16 in sequence to enable the wax emulsion and the papermaking sludge ash to be uniformly scattered on the mixed aggregates to obtain final aggregates, conveying the final aggregates into a stirrer 13 through the lower-layer conveyor belt 12, weighing the final aggregates in the stirrer 13 by using a weighing test table 14, stopping the upper-layer left-side conveyor belt 10, the upper-layer right-side conveyor belt 11 and the lower-layer conveyor belt 12 after the design quality is reached, closing the aggregate bin 1, the first wax emulsion bin 4, the first papermaking sludge ash bin 7, the second papermaking sludge ash bin 15 and the second papermaking sludge ash bin 16, starting the stirrer 13 to modify the aggregates, and drying the aggregates to obtain the final aggregates.
The transmission speed of the upper layer left side conveyor belt 10 is 0.5m/s, the transmission speed of the upper layer right side conveyor belt 11 and the lower layer conveyor belt 12 is 0.5-1.5 m/s, and the mutation is repeated with the mutation interval time of 1s; the discharge flow rates of the first wax emulsion bin 4, the first papermaking sludge ash bin 7, the second wax emulsion bin 15 and the second papermaking sludge ash bin 16 are 100ml/s.
The adhesion between the acidic aggregate and the asphalt was tested according to the aggregate-asphalt adhesion test (poaching method) in the Hydraulic asphalt concrete test protocol (DL/T5362-2009). The adhesion between the acid aggregate and the asphalt is evaluated according to the regulations of the test regulations of hydraulic asphalt concrete (DL/T5362-2009), and the grade of the adhesion between the aggregate and the asphalt is from good to different: 5. 4, 3, 2, 1 rating.
Example 2
The difference from example 1 is that: the transmission speed of the upper right conveyor belt 11 and the lower conveyor belt 12 is 1.5-2.5 m/s, and the mutation is repeated, wherein the mutation interval time is 1s;
the adhesion between the acidic aggregate and the asphalt was tested according to the aggregate-asphalt adhesion test (poaching method) in the Hydraulic asphalt concrete test protocol (DL/T5362-2009). The adhesion between the acid aggregate and the asphalt is evaluated according to the regulations of the test regulations of hydraulic asphalt concrete (DL/T5362-2009), and the grade of the adhesion between the aggregate and the asphalt is from good to different: 5. 4, 3, 2, 1 rating.
Example 3
The difference from example 1 is that: the transmission speed of the upper right conveyor belt 11 and the lower conveyor belt 12 is 2.5-3.5 m/s, and the mutation is repeated, wherein the mutation interval time is 1s;
the adhesion between the acidic aggregate and the asphalt was tested according to the aggregate-asphalt adhesion test (poaching method) in the Hydraulic asphalt concrete test protocol (DL/T5362-2009). The adhesiveness between the acid aggregate and the asphalt is evaluated according to the regulations of the test regulations for hydraulic asphalt concrete (DL/T5362-2009), and the grade of the adhesiveness between the aggregate and the asphalt is from good to different: 5. 4, 3, 2, 1 rating.
Analysis of experimental results for each example:
results of the poaching process the aggregate to asphalt adhesion ratings for the different examples are given in the following table:
| item | Comparative example | Example 1 | Example 2 | Example 3 |
| Adhesion rating | 1 | 3 | 4 | 4 |
From the results of the boiling method test, the adhesion between the granite and the acidic aggregate in the comparative example is only grade 1, the adhesion is the worst, the adhesion in the example 1 reaches grade 3 under the action of the wax emulsion and the papermaking sludge ash after the acidic aggregate is modified, the adhesion is obviously improved, and the adhesion between the granite and the acidic aggregate in the examples 2 and 3 is improved to grade 4 and is close to the adhesion between the granite and the acidic aggregate and the alkaline aggregate.
Claims (5)
1. The acidic aggregate performance improving device based on surface treatment is characterized by comprising an upper-layer left-side conveying belt (10), wherein an aggregate bin (1), a first wax emulsion bin (4) and a first papermaking sludge ash bin (7) are sequentially arranged above the upper-layer left-side conveying belt (10) according to the conveying direction, the upper-layer right-side conveying belt (11) is arranged at the conveying tail end of the upper-layer left-side conveying belt (10), a lower-layer conveying belt (12) is arranged below the upper-layer right-side conveying belt (11), a stirring machine (13) is arranged at the conveying tail end of the lower-layer conveying belt (12), the stirring machine (13) is arranged on a weighing test bed (14), and a second wax emulsion bin (15) and a second papermaking sludge ash bin (16) are sequentially arranged between the upper-layer right-side conveying belt (11) and the lower-layer conveying belt (12) according to the conveying direction of the lower-layer conveying belt (12);
a filter screen (9) is arranged in the first papermaking sludge ash bin (7), and a valve (3) is arranged at an outlet of the first papermaking sludge ash bin (7);
a filter screen (9) is arranged in the second papermaking sludge ash bin (16), and a valve (3) is arranged at an outlet of the second papermaking sludge ash bin (16);
and flowmeters are arranged on the first wax emulsion bin (4), the first papermaking sludge ash bin (7), the second wax emulsion bin (15) and the second papermaking sludge ash bin (16).
2. The acidic aggregate performance improving device based on surface treatment according to claim 1, characterized in that a valve (3) is arranged at the outlet of the aggregate bin (1).
3. The acidic aggregate performance improving device based on surface treatment according to claim 1, characterized in that a spray nozzle (6) is arranged at the outlet of the first wax emulsion bin (4), and a valve (3) is arranged above the spray nozzle (6).
4. The acidic aggregate performance improving device based on surface treatment according to claim 1, characterized in that a spray nozzle (6) is arranged at the outlet of the second wax emulsion bin (15), and a valve (3) is arranged above the spray nozzle (6).
5. The method for improving acidic aggregate by using the acidic aggregate performance improving device based on surface treatment according to any one of claims 1 to 4 is characterized by comprising the following steps: starting an upper-layer left-side conveyor belt (10), an upper-layer right-side conveyor belt (11) and a lower-layer conveyor belt (12), opening an aggregate bin (1) to enable aggregates to be flatly paved on the upper-layer left-side conveyor belt (10), then sequentially opening a first wax emulsion bin (4) and a first paper-making sludge ash bin (7) to enable wax emulsion and paper-making sludge ash to uniformly scatter on the surfaces of the aggregates to obtain mixed aggregates, the mixed aggregates are continuously conveyed to the upper-layer right-side conveyor belt (10) and then fall onto the lower-layer conveyor belt (12), sequentially opening a second wax emulsion bin (15) and a second paper-making sludge ash bin (16) to enable the wax emulsion and the paper-making sludge ash to uniformly scatter on the mixed aggregates to obtain final aggregates, the final aggregates are conveyed to a stirrer (13) through the lower-layer conveyor belt (12), when the quality of the final aggregates in the stirrer (13) is weighed by a weighing test table (14), stopping the upper-layer left-side conveyor belt (10), the upper-layer right-side conveyor belt (11) and the lower-layer conveyor belt (12) after the designed quality of the final aggregates is weighed, the first wax emulsion bin (4), the first wax emulsion bin (7), the second paper-making sludge ash bin (7) is weighed, the second paper-making sludge ash bin (15) is weighed, the stirring aggregate bin is dried, and the aggregate is taken out, and the final aggregates, and the aggregate is taken out, and the aggregate is dried to obtain the final aggregates, and the aggregates are dried, and the aggregates are obtained, and the aggregates are dried;
the conveying speed of the upper layer left side conveyor belt (10) is 0.5m/s, and the conveying speed of the upper layer right side conveyor belt (11) and the lower layer conveyor belt (12) is 0.5-3.5m/s;
the discharge flow rates of the first wax emulsion bin (4), the first papermaking sludge ash bin (7), the second wax emulsion bin (15) and the second papermaking sludge ash bin (16) are 100ml/s.
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO1996023639A1 (en) * | 1995-01-30 | 1996-08-08 | Yvon Cloutier | Mobile concrete plant |
| CN201224862Y (en) * | 2008-06-20 | 2009-04-22 | 陕西长大博源公路养护科技有限公司 | Preprocess equipment for aggregating on road surface |
| CN104074119B (en) * | 2014-06-24 | 2016-01-20 | 华南理工大学 | Butt up against stone surface modification atomising device and the control method thereof in asphalt mixing building |
| CN104086219B (en) * | 2014-06-26 | 2016-05-04 | 华南理工大学 | A kind of building stones surface property improves system and method |
| CN108547194A (en) * | 2018-04-19 | 2018-09-18 | 中交第二公路工程局有限公司 | A kind of broken pebble asphalt surface course construction method under High aititude adverse circumstances |
| CN210589932U (en) * | 2019-07-26 | 2020-05-22 | 北京市高强混凝土有限责任公司 | Concrete aggregate pre-wetting device |
| CN110700039A (en) * | 2019-11-14 | 2020-01-17 | 中交一公局集团有限公司 | Device and method for treating chemical slurry on surface of crushed stone |
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