CN101691732A - Technique for crushing and water washing of aggregates on asphalt pavement of high-speed highway - Google Patents
Technique for crushing and water washing of aggregates on asphalt pavement of high-speed highway Download PDFInfo
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Abstract
The invention relates to a technique for the crushing and the water washing of aggregates on an asphalt pavement of a high-speed highway, which comprises the following steps: selecting stone blocks at a feeding opening; crushing and sieving stone materials; manufacturing sand by a sand manufacturing machine and removing dust; washing coarse aggregates which are greater than 4.75mm by water; and flushing sewage, precipitating and recycling. By crushing three times, sieving four times, adopting the sand manufacturing machine to match with high-power dust removal equipment, arranging fan drum cloth at a discharge port of the sand manufacturing machine and arranging a water spraying facility for spraying water in a proper amount, the invention can effectively reduce dust emission and pollution to an ambient environment; the aggregates can be quickly and effectively washed in an omnibearing way by arranging a high-pressure water spraying pipe network above a vibration sieve, by washing the aggregates through limewater the surface cleanness and the surface alkalinity of the aggregates can be enhanced, and the adhesion property of asphalt is reinforced; and a five-level settling tank technology is adopted, flushing water is recycled, the cleanness of the used water is ensured, and water resources can be saved.
Description
Technical field
Technology of the present invention relates to expressway construction project asphalt concrete pavement surface coarse aggregate, and (〉=4.75cm) production and processing particularly is used for the production and processing technology that production and processing high-cleanness, high and high pitch adsorptivity road surface gather materials.
Background technology
The development of China expressway construction is very fast, has also obtained bigger development and raising as the production of the rubble of the base stock of expressway construction.The common breaking method of building stones has following several:
(1) crushing utilizes two fragmentation work to exert pressure in the face of building stones, makes building stones produce distortion and fragmentation.
(2) split the broken power of splitting that produces when utilizing pointed tooth wedging material, make building stones be broken into two, and produce local broken splitting point of force application along right in the face.
(3) (crooked broken) building stones between broken work plane that fracture as bearing concentrated load two fulcrums (or many fulcrums) beam, except that application point is split power, mainly are to make building stones power and fragmentation by bending.
(4) smash the impact force snap on building stones, make be hit power effect and pulverizing rapidly of building stones.
(5) grind broken work plane and on the building stones surface, slide relatively, the building stones surface is produced shearing force, make the building stones surface failure of rock produce the fine grained powder.
According to above smashing principle and method, the crushing mechanism of producing in the world is nearly following several at present: kibbler roll; Jaw crusher; Gyratory crusher; Gyratory crusher; Hammer mill; Impact breaker; Disk breaker; The rolling wheel crushing engine; The stone-crash-stone crushing engine; The ball mill roller mill.Different broken types have different crushing effects to building stones.
Express highway pavement foundation, surface layer are relatively stricter to the quality requirement of building stones.The quality of building stones comprises two aspects, the one, and resource characteristics is the mechanical strength of rubble, durability, chemical stability, surface characteristic and exist objectionablely etc. should satisfy the table quality requirement according to the technical specification asphalt surface course with coarse aggregate; The 2nd, the processing stone materials characteristic mainly comprises the uniformity that particle size and grating, particle shape, particle are formed, cleanliness factor and 0.075mm granule content etc.Gather materials clean level and surface of good of top course sticked performance, is the key factor that improves the Asphalt Concrete Pavement of Freeway quality.Done number of research projects about aspects such as aggregate crusher theory, crushing mechanism design, practices both at home and abroad, but not from raising gather materials clean level and with the document of asphalt adhesion aspect comprehensive study aggregate crusher.
Summary of the invention
The object of the invention provides a kind of technology of flexible pavement crushing and water washing of aggregates, and it can obtain road than high cleanliness and high pitch adsorptivity with gathering materials.
The purpose of technology of the present invention is achieved in that
A kind of technology of flexible pavement crushing and water washing of aggregates, described processing step comprises:
(1) the spout stone is selected:
The quality control index of surface course spout stone is: crush values (%) is not more than 26, and Los Angeles abrasion loss (%) is not more than 28 millimeters, and apparent relative density is not less than 2.60, and water absorption rate (%) is not more than 2.0; Soundness (%) is not more than 12; The polishing value is not less than 42; Be not less than 5 with pitch adhesion (level).
The quality control index of other layers spout stone is: crush values (%) is not more than 28, and Los Angeles abrasion loss (%) is not more than 30, and apparent relative density is not less than 2.50, and water absorption rate (%) is not more than 3.0; Soundness (%) is not more than 12; Be not less than 4 with pitch adhesion (level).
(2) the broken and screening of building stones:
The broken detailed process of building stones is: stone is by vibration feeder, and the earth in the stone is fallen in screening, enter the jaw crusher fragmentation again after, hit back brokenly again, and utilize impact energy that stone is broken once more, then by the shaping of system sand machine;
System sand machine production mechanism sand is adopted in the shaping of system sand machine, and shape is regular, rough surface, and corner angle are good, between gathering materials, thickness meshes closely, Stability Analysis of Structures, frictional resistance is good, can effectively reduce faller gill shape content, and the shape of guaranteeing to gather materials is near cube.
Be soft rock content during effectively the minimizing road surface gathers materials, behind the impact crushing building stones, should adopt No. 1 vibrosieve to screen out the following aggregate chips of 2.36mm, aggregate chips can be used for the steady base material of water.
By the building stones after the shaping of system sand machine, go out greater than the gathering materials of required maximum particle diameter 26.5mm with No. 2 bolting, and by conveyer belt, building stones are returned to make in the sand machine separate minor benefit usefulness, the waste that can avoid big particle diameter to gather materials.
(3) system sand mechanism sand and dedusting:
Aspirate with deduster in the mechanism sand process, reduce the dust content in the machine-processed sand; Mechanism sand discharging opening is provided with air duct cloth; Set up the steelframe booth, around the steelframe booth, hang the sunshade net; And from top water spray dedusting.
(4) washing is greater than the coarse aggregate of 4.75mm:
Gathering materials after the processing of mechanism sand washed, and whitewash is adopted in washing, sprays by the water under high pressure pipe network is set, and whitewash concentration adopts the pH value control indexes.Alkalescence is gathered materials, and the pH value scope adopts 8～10, for acidity aggregate, requires the pH value scope to adopt 10～12, divides into big capacity mud storage pool at vibrosieve simultaneously; The cement concrete sclerosis is adopted in the discharging opening place, and 2% gradient is set; Around the place gutter should be set.
Broken back particle diameter sprays certain density whitewash greater than the coarse aggregate of 4.75mm by on No. 3 vibrosieves the water under high pressure pipe network being set, can comprehensive, Rapid Cleaning coarse aggregate.Washing should be noted that the following aspects:
Tilt to place No. 3 vibrosieves, the compass screen surface angle of inclination is 15 °～25 °, guarantees to divide and the optimum organization of washing two operations at this angle next part material screen.Sieve out 4.75mm-9.5mm respectively; 9.5mm-19mm; 19mm-26.5mm three kinds are gathered materials.
Divide into big capacity mud storage pool at No. 3 vibrosieves, periodic cleaning effectively reduces the sewage mud content.
Cement concrete sclerosis must be adopted in the discharging opening place, and 2% gradient is set, and making gathers materials after vibrosieve water outlet and the screening takes water out of and can flow out the place.
Around the place gutter should be set, compile flushing sewage and go into the number one sedimentation basin, effectively prevent sewage cross flow everywhere, recycling water resource.
(5) flushing sewage Pyatyi precipitation is recycled
The sedimentation basin size should be provided with according to crushing engine production capacity, and first, second and third grade sedimentation basin can be taked same size preface arrangement successively, and reduces the delivery port height one by one, effectively precipitates mud in the flushing water; The size of fourth stage sedimentation basin should flow out to the water yield setting of level V sedimentation basin according to the water influx of third level sedimentation basin; The size of level V sedimentation basin should per hour the water influx and the new water increment of pump-out, fourth stage sedimentation basin be determined according to the high-pressure hydraulic pump load operation.At the bottom of the sedimentation basin pond and wall waterproofing course should be set, anti-sealing infiltration.Regularly mud in the scavenger precipitation pond guarantees the sedimentation basin purifying water effect.
Equipment of the technology of flexible pavement crushing and water washing of aggregates of the present invention and uses thereof is auspicious see Table 1 see for details shown in.
Table 1 plant table
| Sequence number | Device name | Model | Unit | Quantity | Purposes |
| ??1 | The pick machine | 220 types | Platform | ??2 | Stone is separated little |
| ??2 | Vibration feeder | Platform | ??1 | Feeding, remove | |
| ??3 | Jaw crusher | ??600×900 | Platform | ??1 | Broken stone |
| ??4 | Counterattack is broken | 1214 types | Platform | ??1 | Break up stone |
| ??5 | Vibrosieve | Shake frequency 800～900 | Platform | ??3 | Screening is gathered materials |
| ??6 | System sand machine | ??PCL-1250 | Platform | ??1 | The shaping of gathering materials |
| ??7 | Deduster | 35 types | Platform | ??1 | Remove dust |
| ??8 | High-pressure hydraulic pump | 6.5 type | Platform | ??1 | Spray whitewash |
| ??9 | The diesel oil water pump | Platform | ??1 | Make up water | |
| ??10 | Loader | 50 types | Platform | ??2 | Charging |
Technique for crushing and water washing of aggregates on asphalt pavement of high-speed highway of the present invention comprises: the spout stone is selected; Building stones fragmentation, screening; System sand mechanism sand and dedusting; Washing is greater than the coarse aggregate of 4.75mm; The flushing settlement of sewage is recycled.Effect of the present invention is: by tertiary crushing, four screenings, can reduce soft grain in aggregate and faller gill shape content, improve aggregate quality; Adopt system sand machine to cooperate high-power cleaner, and at machine-processed sand discharging opening air duct cloth is set, set up the steelframe booth, hang the sunshade net around the booth, the top is provided with the water spray facility and sprays water in right amount, can effectively reduce airborne dust and to the pollution of surrounding environment; The pipe network that sprays water with high pressure is arranged in employing above vibrosieve, can comprehensive, quick, effective cleaning gather materials, and reduces the following granule content of 0.075mm; Adopt whitewash to clean and gather materials, can improve surface of aggregate cleanliness factor and surface alkalinty, strengthen the adhesion of pitch; Adopt Pyatyi sedimentation basin technology, recycling flushing water is guaranteed the water cleaning, can the conserve water resource.
Description of drawings
Accompanying drawing is a process chart of the present invention
Specific embodiment
Present embodiment is Pengze, Jiangxi Province a to exit of a lake speedway AP1 mark contract section, it is domestic to be positioned at Pengze County, Jiujiang City, Jiangxi Province, the long 26.98Km of main line, connect line length 8.1Km, top course adopts 4cmAC13 modified asphalt concrete+6cmAC20 modified asphalt concrete+8cmAC25 plain asphalt concrete.Principal works quantity comprises: graded broken stone subbase 18.9 ten thousand sides, steady 26.5 ten thousand sides of basic unit of water, asphalt concrete pavement 11.9 ten thousand sides.
This unit in charge of construction increases input, and the innovation construction technology is to guarantee the road surface quality of getting the raw materials ready.The steady basic unit of the water material sclerosis of thick 18cm is adopted in the feed bin place in mixing and stirring field and rubble processing space, and the place road has adopted thick 20cm C20 hardening of concrete, and drainages such as horizontal wall inscription, mortar flag stone gutter are set, and guarantees that an internal drainage is unimpeded and material is clean.The high 2m of the hard partition wall of feed bin guarantees that each grade gathers materials and separate to stack, do not scurry material.Fine aggregate below the 4.75mm and machine-processed sand have been installed booth, and building area reaches 6700 square metres, guarantees fine aggregate stacking area, and can effectively prevent to drench with rain guarantees that grating is stable, has shortened drying time, has saved fuel, has obtained good economic benefits.
1214 types of having installed in asphalt pavement material processing operation area are strikeed back and are broken, PCL-1250 makes sand machine and high-power deduster.Also be provided with the circulation of jumbo reservoir and Pyatyi sedimentation basin and adopt alkaline lime water to carry out the surface layer washing of gathering materials, by washing with powerful cleaner is installed, guaranteed that the cleaning of coarse aggregate and grating stablize.Table 2 is example sedimentation basin sizes at different levels.
Table 2 production capacity is 100 tons production line sedimentation basin sizes at different levels per hour
The technology concrete steps of a kind of flexible pavement crushing and water washing of aggregates of present embodiment comprise:
Step 1) spout stone is selected:
The quality control index of surface course spout stone is: crush values (%) is not more than 26, and Los Angeles abrasion loss (%) is not more than 28, and apparent relative density is not less than 2.60, and water absorption rate (%) is not more than 2.0; Soundness (%) is not more than 12; The polishing value is not less than 42; Be not less than 5 with pitch adhesion (level).
The quality control index of other layers spout stone is: crush values (%) is not more than 28, and Los Angeles abrasion loss (%) is not more than 30, and apparent relative density is not less than 2.50, and water absorption rate (%) is not more than 3.0; Soundness (%) is not more than 12; Be not less than 4 with pitch adhesion (level).
Step 2) building stones tertiary crushing, four screenings:
The broken detailed process of building stones is: stone is by vibration feeder, and the earth in the stone is fallen in screening, enter 600 * 900 jaw crusher fragmentations again after, it is broken to enter the counterattack of 1214 types again, and utilizes impact energy that stone is broken once more, then by the shaping of system sand machine;
For reducing the tentatively broken power consumption of stone, stone enters the counterattack of 1214 types again and breaks at first by 600 * 900 jaw crushers after the fragmentation, utilize impact energy that stone is broken once more, by the shaping of system sand machine, adopt special-purpose system sand machine production mechanism sand again, shape is regular, rough surface, corner angle are good, and engagement was closely between thickness was gathered materials, Stability Analysis of Structures, frictional resistance is good, can effectively reduce faller gill shape content, and the shape of guaranteeing to gather materials is near cube.
For soft rock content during effectively the minimizing road surface gathers materials, behind the impact crushing building stones, should adopt 1
#Vibrosieve screens out the following aggregate chips of 2.36mm, and aggregate chips can be used for the steady base material of water.
By the building stones after the shaping of system sand machine, with 2
#Bolting went out greater than the gathering materials of required maximum particle diameter 26.5mm, and by conveyer belt, building stones is returned in the system sand machine separate minor benefit usefulness, the waste that can avoid big particle diameter to gather materials.
Step 3) system sand mechanism sand and dedusting:
The dust removal installation of taking comprises: aspirate in the machine-processed sand process, reduce the dust content in the machine-processed sand; Mechanism sand discharging opening is provided with air duct cloth; Set up the steelframe booth, around the steelframe booth, hang the sunshade net; The top is provided with fountain head.
Step 4) is washed the coarse aggregate greater than 4.75mm:
Adopt whitewash, spray by the water under high pressure pipe network is set, whitewash concentration adopts the pH value control indexes.Alkalescence is gathered materials, and the pH value scope adopts 8～10, for acidity aggregate, requires the pH value scope to adopt 10～12, and other measures comprise: vibrosieve is divided into big capacity mud storage pool; The cement concrete sclerosis must be adopted in the discharging opening place, and 2% gradient is set; Around the place gutter should be set.
Broken back particle diameter is greater than the coarse aggregate of 4.75mm, by 3
#The water under high pressure pipe network is set on the vibrosieve sprays certain density whitewash, can comprehensive, Rapid Cleaning coarse aggregate.Washing should be noted that the following aspects:
Tilt to place 3
#Vibrosieve, the compass screen surface angle of inclination is 20 °, guarantees to divide and the optimum organization of washing two operations at this angle next part material screen.Sieve out 4.75mm-9.5mm respectively; 9.5mm-19mm; 19mm-26.5mm three kinds are gathered materials.
Whitewash concentration adopts the pH value control indexes.Alkalescence is gathered materials, and the pH value scope adopts 8～10, for acidity aggregate, requires the pH value scope to adopt 10～12.
3
#Vibrosieve is divided into big capacity mud storage pool, and periodic cleaning effectively reduces the sewage mud content.
Cement concrete sclerosis must be adopted in the discharging opening place, and 2% gradient is set, and making gathers materials after vibrosieve water outlet and the screening takes water out of and can flow out the place.
Around the place gutter should be set, compile flushing sewage and go into the number one sedimentation basin, effectively prevent sewage cross flow everywhere, recycling water resource.
Step 5) flushing sewage Pyatyi precipitation is recycled
The sedimentation basin size should be provided with according to crushing engine production capacity, and first, second and third grade sedimentation basin can be taked same size preface arrangement successively, and reduces the delivery port height one by one, effectively precipitates mud in the flushing water; The size of fourth stage sedimentation basin should and flow out to the water yield setting of level V sedimentation basin according to the water influx of third level sedimentation basin; The size of level V sedimentation basin should per hour the water influx and the new water increment of pump-out, fourth stage sedimentation basin be determined according to the high-pressure hydraulic pump load operation.At the bottom of the sedimentation basin pond and wall waterproofing course should be set, anti-sealing infiltration.Regularly mud in the scavenger precipitation pond guarantees the sedimentation basin purifying water effect.
Claims (3)
1. the technology of a flexible pavement crushing and water washing of aggregates, it is characterized in that: described processing step comprises:
(1), the spout stone is selected:
The quality control index of surface course spout stone is: crush values (%) is not more than 26, and Los Angeles abrasion loss (%) is not more than 28 millimeters, and apparent relative density is not less than 2.60, and water absorption rate (%) is not more than 2.0; Soundness (%) is not more than 12; The polishing value is not less than 42; Be not less than 5 with pitch adhesion (level).The quality control index of other layers spout stone is: crush values (%) is not more than 28, and Los Angeles abrasion loss (%) is not more than 30, and apparent relative density is not less than 2.50, and water absorption rate (%) is not more than 3.0; Soundness (%) is not more than 12; Be not less than 4 with pitch adhesion (level);
(2), the broken and screening of building stones:
Stone is by vibration feeder, and the earth in the stone is fallen in screening, enter the jaw crusher fragmentation again after, hit back brokenly again, and utilize impact energy that stone is broken once more, then by the shaping of system sand machine; Behind the impact crushing building stones, adopt No. 1 vibrosieve to screen out the following aggregate chips of 2.36mm; By the building stones after the shaping of system sand machine, go out greater than the gathering materials of required maximum particle diameter 26.5mm with No. 2 bolting, and by conveyer belt, with building stones return make separate in the sand machine little;
(3), system sand mechanism sand and dedusting:
Aspirate with deduster in the mechanism sand process, machine-processed sand discharging opening is provided with air duct cloth; And from top water spray dedusting;
(4), the broken back particle diameter after the machine-processed sand processing is washed greater than the coarse aggregate of 4.75mm, whitewash is adopted in washing, by spraying by water under high pressure pipe network on No. 3 vibrosieves, whitewash concentration adopts the pH value control indexes, alkalescence is gathered materials, and the pH value scope adopts 8～10, for acidity aggregate, require the pH value scope to adopt 10～12, other measures comprise: vibrosieve is divided into sedimentation basin and is reached the washing water circulation use.
2. the technology of flexible pavement crushing and water washing of aggregates according to claim 1, it is characterized in that: described machine-processed sand discharging opening is set up the steelframe booth, establishes the sunshade net, and from the water spray dedusting of booth top; Described No. 3 vibrosieves tilt to place, and the compass screen surface angle of inclination is 15 °～25 °, sieves out 4.75mm-9.5mm respectively; 9.5mm-19mm; 19mm-26.5mm three kinds are gathered materials.
3. the technology of flexible pavement crushing and water washing of aggregates according to claim 1, it is characterized in that: divide into the Pyatyi sedimentation basin at No. 3 vibrosieves, first, second and third grade sedimentation basin can be taked same size preface arrangement successively, and reduce the delivery port height one by one, third level sedimentation basin connects the 4th and the level V sedimentation basin, at the bottom of the sedimentation basin pond and wall waterproofing course should be set, water after the washing is recycling after through the level V sedimentation basin.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101158914A CN101691732B (en) | 2009-09-07 | 2009-09-07 | Technique for crushing and water washing of aggregates on asphalt pavement of high-speed highway |
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| CN2009101158914A CN101691732B (en) | 2009-09-07 | 2009-09-07 | Technique for crushing and water washing of aggregates on asphalt pavement of high-speed highway |
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| CN101691732B CN101691732B (en) | 2011-05-04 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102363947A (en) * | 2011-11-14 | 2012-02-29 | 余金全 | Reductive regeneration system and reductive regeneration process for pavement surface milling material |
| CN102806133A (en) * | 2012-08-23 | 2012-12-05 | 中铁五局（集团）有限公司 | Machine-made sand processing process |
| CN103406185A (en) * | 2013-07-31 | 2013-11-27 | 李小福 | Production line for producing sand |
| CN103433108A (en) * | 2013-07-09 | 2013-12-11 | 王燕 | Drying-method sand making device and process |
| CN103521433A (en) * | 2013-09-30 | 2014-01-22 | 邢台路桥交通设施有限公司 | Integrated space stone shaping screening system |
| CN105821740A (en) * | 2016-03-29 | 2016-08-03 | 南方高科工程技术有限公司 | Regeneration screening device special for old asphalt material |
| CN106414360A (en) * | 2014-05-10 | 2017-02-15 | 创新桑德有限责任公司 | Method and device for producing artificial crushed sand by means of a thermal treatment using sand in the form of fine sand (fS/FSa) and/or round sand as the starting material |
| CN111977998A (en) * | 2020-08-27 | 2020-11-24 | 长安大学 | High-surface-roughness aggregate and preparation method thereof |
| CN112067472A (en) * | 2020-07-22 | 2020-12-11 | 四川科路泰交通科技有限公司 | Coarse aggregate durability test method |
| CN112945702A (en) * | 2021-01-29 | 2021-06-11 | 西安航空学院 | Mountain stone stability testing arrangement |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102363947A (en) * | 2011-11-14 | 2012-02-29 | 余金全 | Reductive regeneration system and reductive regeneration process for pavement surface milling material |
| CN102806133B (en) * | 2012-08-23 | 2015-01-14 | 中铁五局（集团）有限公司 | Machine-made sand processing process |
| CN102806133A (en) * | 2012-08-23 | 2012-12-05 | 中铁五局（集团）有限公司 | Machine-made sand processing process |
| CN103433108A (en) * | 2013-07-09 | 2013-12-11 | 王燕 | Drying-method sand making device and process |
| CN103406185B (en) * | 2013-07-31 | 2015-11-18 | 李小福 | A kind of sand production line processed |
| CN103406185A (en) * | 2013-07-31 | 2013-11-27 | 李小福 | Production line for producing sand |
| CN103521433A (en) * | 2013-09-30 | 2014-01-22 | 邢台路桥交通设施有限公司 | Integrated space stone shaping screening system |
| CN106414360A (en) * | 2014-05-10 | 2017-02-15 | 创新桑德有限责任公司 | Method and device for producing artificial crushed sand by means of a thermal treatment using sand in the form of fine sand (fS/FSa) and/or round sand as the starting material |
| US10669200B2 (en) | 2014-05-10 | 2020-06-02 | Black Ramel Limited | Method and device for producing artificial broken sand or crushed sand by means of a thermal treatment using sand in the form of fine sand (fS/FSa) and/or round sand as the starting material |
| CN105821740A (en) * | 2016-03-29 | 2016-08-03 | 南方高科工程技术有限公司 | Regeneration screening device special for old asphalt material |
| CN112067472A (en) * | 2020-07-22 | 2020-12-11 | 四川科路泰交通科技有限公司 | Coarse aggregate durability test method |
| CN111977998A (en) * | 2020-08-27 | 2020-11-24 | 长安大学 | High-surface-roughness aggregate and preparation method thereof |
| CN112945702A (en) * | 2021-01-29 | 2021-06-11 | 西安航空学院 | Mountain stone stability testing arrangement |
| CN112945702B (en) * | 2021-01-29 | 2023-07-14 | 西安航空学院 | Mountain rock stability testing device |
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