CN109267442A - The proportion design method of vibration moulding graded broken stone - Google Patents
The proportion design method of vibration moulding graded broken stone Download PDFInfo
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- CN109267442A CN109267442A CN201811207421.6A CN201811207421A CN109267442A CN 109267442 A CN109267442 A CN 109267442A CN 201811207421 A CN201811207421 A CN 201811207421A CN 109267442 A CN109267442 A CN 109267442A
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- broken stone
- graded broken
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/02—Coherent pavings made in situ made of road-metal without binders
- E01C7/04—Coherent pavings made in situ made of road-metal without binders of broken stones, gravel, or like materials
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Abstract
This case is related to a kind of proportion design method of vibration moulding graded broken stone, it the steps include: S1, selection graded broken stone proportion: the gradation of optimized graded broken stone are as follows: mix in the partial size to gather materials, greater than 6~8 parts of 22mm, 5~6 parts of 22~10mm, 6~8 parts of 10~2.5mm, 3~4 parts of 2.5~0.06mm, less than 0.5~1 part of 0.06mm；S2, it is added in the mixing of step S1 is gathered materials by oil immersion processing auxiliary material；S3, laboratory test；The mixing of graded broken stone obtained by design method of the present invention is gathered materials, and in the attainable density of construction when institute closer to maximum dry density, CBR intensity is also higher；When applied to site operation, it is not necessarily to special installation, after static pressure for several times, weak shock, macroseism, compactness reaches as high as 98%, Field Compactness can achieve higher design requirement 96% or more.
Description
Technical field
The invention belongs to technical field of road engineering materials, and in particular to a kind of proportion design of vibration moulding graded broken stone
Method.
Background technique
China has developed more late than western developed country nearly half a century by the modern highway of representative of highway, from eight
The ten's ends started, and the development of highway in China starts to do all one can to catch up, and experienced the high speed development of many decades, achieved highly visible
Achievement.
Due to construction theory, scientific research level, construction quality etc., the early stage highway of construction is generally difficult to reach ideal
Service life, there have been a large amount of pavement damage when part highway comes into operation in the early stage, still further aspect, with automobile and
The rapid development of transport service, various vehicles especially heavy goods vehicle also constitute challenge to the service life of highway.
Perfect with highway in China standard and quality inspection, highway construction quality has been achieved for significant progress, but at present
There are still the problem of be that part new highway is especially the highway general design period for being still difficult to reach requirement.Largely
The application and research structure that shows sub-surface and quality to highway total quality and service life important role, it is current I
State's highway pavement mostly uses semi-rigid type base, has many advantages, such as that plate body is good, intensity is high, low cost, but have rigidity simultaneously
Greatly, poor with the compatible deformation ability of other layers, the disadvantages of easy to crack and durability is poor；It is easier to cause pavement disease, because semi-rigid
Base's factor and the disease caused mainly has: 1) reflection cracking in a pavement, this is naturally determined by the characteristic of semi-rigid pavement；
2) closely knit semi-rigid type base makes hydropexis in substrate top surface, causes to form flowing pressure under Vehicle Load, causes base
Wash away, purt slurry, accelerate the generation in crack, pit slot, track to a certain extent.3) semi-rigid pavement is heavily loaded, super in vehicle
Under load effect, surface layer and base's fatigue are easily caused, service life is caused to greatly shorten.
It is a kind of effective means for solving the problems, such as semi-rigid type base disease that grade distribution type, which is gathered materials, can be mixed with asphalt road and cement
The base of solidifying soil surface and underlayment, it is also possible to which doing roadbed improves layer.Under the premise of well-drained, grade distribution type is gathered materials can be not
The road of different Traffic volume levels is used for climatic province.
Grade distribution type gather materials in it is mostly important one is graded broken stone, can be laid on light traffic road and be used as road surface or thin drip
Under green surface layer, or on Heavy Traffic Road road under thick asphalt surface course, it can be used as bituminous sheaths and hydraulic binder punish base
Middle layer between layer.
When under the thick asphalt surface course of heavy traffic road, usually there are two types of forms, first is that construction quality is high-quality well
The graded broken stone of amount is used directly under thick asphalt surface course as base, and another kind is that the slightly secondary gradation of construction quality is gathered materials and is used for
Deeper position, commonly used in having below binder base；It is used as bituminous sheaths and hydraulic binder punishes base, i.e. semi-rigid
Property base between middle layer when, the desciccation crack that semi-rigid type base is reflected on asphalt surface course can be reduced, that is, mitigate reflection split
Seam is also beneficial to exclude the water in road surface structare layer, decreases or even eliminates the wash away phenomenon of base.
Generally speaking, graded broken stone can be absorbed and cut down semi-rigid type base and obtains point stresses, reduces and delayed reflex is split
The generation of seam, moreover it is possible to play the drainage condition for improving sub-surface, improve high grade highway pavement and use quality, extend and use the longevity
Life；Meanwhile cooperating with semi-rigid type base, it is set between surface layer and semi-rigid type base, graded broken stone easily obtains high compactness, has
Conducive to giving full play to its mechanical property.
But since the rigidity of graded broken stone base, intensity are lower than semi-rigid type base, while road surface deflection is larger, carrying
Ability is inadequate, also and insufficient for its forming method and proportion optimizing research, therefore, it is necessary to propose a kind of vibration moulding grade
Proportion design method with rubble.
Summary of the invention
The object of the present invention is to provide a kind of easily compacting, dry density is big, construction when the non-breakable vibration moulding grade of particle
With rubble.
The vibration moulding with the generation in delayed reflex crack can be effectively reduced it is a further object to provide one kind
The proportion design method of graded broken stone.
In order to solve the above-mentioned technical problem, the invention discloses a kind of proportion design method of vibration moulding graded broken stone,
The step of design method are as follows:
S1. selection graded broken stone matches:
The gradation of optimized graded broken stone are as follows: mix in the partial size to gather materials, greater than 6~8 parts of 22mm, the 5~6 of 22~10mm
Part, 6~8 parts of 10~2.5mm, 3~4 parts of 2.5~0.06mm, less than 0.5~1 part of 0.06mm；
S2. in the mixing of step S1 is gathered materials be added 0.3~0.5 part by oil immersion processing, the auxiliary material of 1~2.5mm of partial size；
S3. it is determined in step S2 under simulation research on vibrating compaction test method and mixes the optimum moisture content to gather materials and maximum dry density, and
CBR value when compactness is not less than 0.97.
Preferably, the oil immersion processing method is that 1~2h is impregnated in used oil, applies in soaking process and is not less than
1MPa pressure, sunning drains 12~for 24 hours, dries again after washing away its surface oil slick with 40~60 DEG C of water, be added mixing gather materials it is mixed
It is even.
Preferably, the auxiliary material is handled simultaneously in oil immersion, also passes through the intermittent ultrasonication of 15~20min.
Preferably, in the step S3, the maximum dry density determined under simulation research on vibrating compaction test method between 2.1~
Between 2.3g/cm3.
Preferably, CBR >=300% in the step S3, when test compactness is 0.97.
Preferably, compactness of the graded broken stone under this proportion design method in construction is not less than 0.95.
Preferably, the graded broken stone under this proportion design method follows static pressure-weak shock-in simulation research on vibrating compaction test method
The principle of macroseism.
Preferably, the dressing material is obtained by cutting into a mountain block stone or natural pebble through broken screening.
Preferably, needle-shaped in the mixing aggregate particle of the graded broken stone and sheet stone contents are not more than 15%；Matter is soft
It is no more than 10% with breakable stone contents.
The proportion design method of vibration moulding graded broken stone of the invention, has many advantages, such as:
1, gathered materials using the mixing of graded broken stone obtained by design method of the present invention, it is closer in the attainable density of construction when institute
In maximum dry density, CBR intensity is also higher.When applied to site operation, be not necessarily to special installation, by static pressure for several times, weak shock,
After macroseism, compactness reaches as high as 98% 96% or more, Field Compactness fully achieves higher design requirement；It compares
93%~94% compactness under the same execution conditions of common graded broken stone, graded broken stone mixture of the invention are easier shaking
Movement is compacted under, and pavement performance has certain promotion.
2, through oil immersion processing auxiliary material proportion be added so that auxiliary material stiffness by itself improve, and can it is easier enter bulky grain it
Between gap in, it is easier to by vibration be compacted, and reduce in vibrating forming work progress to the structure of particle in graded broken stone
It destroys, makes its performance closer to effect achieved when test；Simultaneously also make graded broken stone of the invention in higher pressure
Still there is lower modulus under solidity, the generation with delayed reflex crack can be effectively reduced.
3, due to the hydrophobicity through oil immersion processing auxiliary material, so that the water filtering performance of graded broken stone of the invention is more preferably, simultaneously
Decrease the capillary phenomenon of water.
4, graded broken stone of the invention combines road surface flexbile base preferably with semi-rigid type base, improves road bearing capacity
And prolong the service life.
Specific embodiment
Below by embodiment, the present invention is described in further detail, to enable those skilled in the art referring to specification
Text can be implemented accordingly.
Such as " have " it should be appreciated that used herein, "comprising" and " comprising " term are not precluded one or more
The presence or addition of a other elements or combinations thereof.
Embodiment 1
A kind of the step of proportion design method of vibration moulding graded broken stone, the design method are as follows:
S1, selection graded broken stone proportion:
The gradation of optimized graded broken stone are as follows: mix in the partial size to gather materials, greater than 8 parts of 22mm, 5 parts of 22~10mm, 10
7 parts of~2.5mm, 3 parts of 2.5~0.06mm, less than 0.5 part of 0.06mm；
S2, in the mixing of step S1 is gathered materials be added 0.3 part by oil immersion processing, the auxiliary material of 1~2.5mm of partial size；
S3, the optimum moisture content to gather materials and maximum dry density are mixed in determining step S2 under simulation research on vibrating compaction test method, and
CBR value at 0.97 or more compactness.Pass through composition, molding mode, gradation design and the cooperation to graded broken stone material
Than design, make test molded test method closer to the actual condition of site operation.
The oil immersion processing method is that 2h is impregnated in used oil, applies the pressure of 1MPa or more, sunning in soaking process
Drain 12~for 24 hours, it is dried again after washing away its surface oil slick with 40~60 DEG C of water, mixing is added and gathers materials mixing.At pressurization oil immersion
Reason can improve the oil content of granules of accessories, and to increase its rigidity, slippery, when vibrating forming is more, easier to enter bulky grain
Between gap, promote gravel particle between surface matching, improve graded broken stone vibrating forming after density and compactness, together
When still keep lower modulus；Using used oil that newly can be stable under normal temperature state, realizes waste utilization, saved cost.
The auxiliary material is handled simultaneously in oil immersion, also passes through the intermittent ultrasonication of 20min.Ultrasonic wave can reduce auxiliary
Expect the air content in particle, keeps granules of accessories oil absorbency higher.
In the step S3, the maximum dry density determined under simulation research on vibrating compaction test method is between 2.1~2.3g/cm3It
Between.Different building stones and rubble match attainable maximal density difference, and graded broken stone can be only achieved preferably under certain density
Pavement performance.
CBR >=300% in the step S3, when test compactness is 0.97.The test of CBR intensity, ensure that this hair
Bright Composition Design of Graded Broken Stone method can reach preferable pavement performance.
After the graded broken stone reaches requirement in the test of step 3, it can be applied in construction；In Specific construction,
The compactness of graded broken stone is not less than 0.95.In general road construction, it is desirable that the compactness reached is usually 93% or so, pole
Less more than 97%, graded broken stone under matching method of the present invention, under same execution conditions, up to 96%, by reasonable strong
Change construction, compactness reaches as high as 98%, is better than common graded broken stone.
In the Specific construction of graded broken stone vibrating forming, it then follows the method for first static pressure, again weak shock, rear macroseism, macroseism time
Number no less than 3 times, strong vibration every time, road roller opens strong vibration when advancing, and when retrogressing opens weak vibration.Reasonable construction arranges to help to improve
Compactness reduces gravel particle structural damage, extends highway service life.
The dressing material is obtained by cutting into a mountain block stone or natural pebble through broken screening, and such stone material is from a wealth of sources, is easier to
It obtains.
Needle-shaped and sheet stone contents are not more than 15% in the mixing aggregate particle of the graded broken stone；Matter is soft easily broken
Stone contents be no more than 10%.Reduce in vibrating forming, subsequent construction and routine use gravel particle be excessively destroyed and
Pavement performance is caused to reduce.
Embodiment 2
Similar to Example 1, difference is, selects graded broken stone proportion are as follows:
The gradation of optimized graded broken stone are as follows: mix in the partial size to gather materials, greater than 6 parts of 22mm, 6 parts of 22~10mm, 10
8 parts of~2.5mm, 3 parts of 2.5~0.06mm, less than 1 part of 0.06mm；
Mixing gather materials in be added 0.5 part by oil immersion processing, the auxiliary material of 1~2.5mm of partial size；
Embodiment 3
Similar to Example 1, difference is, selects graded broken stone proportion are as follows:
The gradation of optimized graded broken stone are as follows: mix in the partial size to gather materials, greater than 8 parts of 22mm, 5 parts of 22~10mm, 10
6 parts of~2.5mm, 4 parts of 2.5~0.06mm, less than 1 part of 0.06mm；
Mixing gather materials in be added 0.5 part by oil immersion processing, the auxiliary material of 1~2.5mm of partial size；
Embodiment 4
Similar to Example 1, difference is, is added without the auxiliary material handled by oil immersion；
Embodiment 5
Under laboratory condition, gathers materials the graded broken stone mixing of Examples 1 to 4 shake and hit real CBR test, as a result as follows:
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| CBR(%) | 347 | 339 | 341 | 321 |
It can be seen that the graded broken stone under proportion design method of the invention has higher CBR intensity, it is added by oil immersion
The auxiliary material of reason improves to its CBR intensity.
Embodiment 6
Under laboratory condition, the maximum dry density carried out under vibration compaction conditions of gathering materials is mixed to the graded broken stone of Examples 1 to 4
Test, as a result as follows:
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Maximum dry density (g/cm3) | 2.21 | 2.25 | 2.26 | 2.11 |
It can be seen that the graded broken stone under proportion design method of the invention has higher maximum dry density, it is added by oil
The auxiliary material for soaking processing, promotes the matching on surface between gravel particle, has certain addition to its maximum dry density.
Embodiment 7
Under the conditions of road construction, road is divided into four sections, is laid with the graded broken stone of Examples 1 to 4 respectively, first uses 15t steel wheel pressure
Road machine to graded broken stone static pressure one time, then it is weak vibration one time；Then it with 22t steel roller vibration weak to graded broken stone 2 times, then uses
22t steel roller shakes by force 4 times, and the stewing material of moisturizing, second day multiple pressure is connect with 22t steel roller vibration weak to graded broken stone 2 times
Shaken by force 3 times with 22t steel roller, last 20t pneumatic-tired rollers are pressed 3 times.Same execution conditions, the data obtained are as follows:
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Compactness (%) | 97.1 | 97.7 | 97.5 | 95.3 |
It can be seen that the graded broken stone under proportion design method of the invention has the compactness close under experimental condition, compared with
Common graded broken stone compactness is higher；It is added the auxiliary material by oil immersion processing, when vibrating forming is more, easier enters big
Gap between grain, promotes the matching on surface between gravel particle, improves the compactness of graded broken stone.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and embodiment shown and described herein.
Claims (9)
1. a kind of proportion design method of vibration moulding graded broken stone, which is characterized in that the step of the design method are as follows:
S1. selection graded broken stone matches:
The gradation of optimized graded broken stone are as follows: mix in the partial size to gather materials, greater than 6~8 parts of 22mm, the 5~6 of 22~10mm
Part, 6~8 parts of 10~2.5mm, 3~4 parts of 2.5~0.06mm, less than 0.5~1 part of 0.06mm；
S2. in the mixing of step S1 is gathered materials be added 0.3~0.5 part by oil immersion processing, the auxiliary material of 1~2.5mm of partial size；
S3. it is determined in step S2 under simulation research on vibrating compaction test method and mixes the optimum moisture content to gather materials and maximum dry density, and
CBR value when compactness is not less than 0.97.
2. the proportion design method of vibration moulding graded broken stone as described in claim 1, which is characterized in that the oil immersion processing
Method is that 1~2h is impregnated in used oil, applies in soaking process and is not less than 1MPa pressure, and sunning drains 12~for 24 hours, with 40~
60 DEG C of water dry again after washing away its surface oil slick, are added and mix mixing of gathering materials.
3. the proportion design method of vibration moulding graded broken stone as claimed in claim 2, which is characterized in that the auxiliary material is in oil
Leaching is handled simultaneously, also passes through the intermittent ultrasonication of 15~20min.
4. the proportion design method of vibration moulding graded broken stone as described in claim 1, which is characterized in that the step S3
In, the maximum dry density determined under simulation research on vibrating compaction test method is between 2.1~2.3g/cm3.
5. the proportion design method of vibration moulding graded broken stone as described in claim 1, which is characterized in that the step S3
In, CBR >=300% when test compactness is 0.97.
6. the proportion design method of vibration moulding graded broken stone as described in claim 4 or 5, which is characterized in that this proportion is set
Compactness of the graded broken stone in construction under meter method is not less than 0.95.
7. the proportion design method of vibration moulding graded broken stone as claimed in claim 6, which is characterized in that this proportion design side
Graded broken stone under method follows static pressure-weak shock-macroseism principle in simulation research on vibrating compaction test method.
8. the proportion design method of vibration moulding graded broken stone as described in claim 1, which is characterized in that the dressing material
It is obtained by cutting into a mountain block stone or natural pebble through broken screening.
9. the proportion design method of vibration moulding graded broken stone as described in claim 1, which is characterized in that the graded broken stone
Mixing aggregate particle in needle-shaped and sheet stone contents be not more than 15%；The soft breakable stone contents of matter are no more than 10%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113077852A (en) * | 2021-03-26 | 2021-07-06 | 山东省路桥集团有限公司 | Cement stabilized macadam mineral aggregate grading optimization method based on waste concrete regenerated aggregate |
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