CN104911973A - Treatment method between stone planting type layers and compound pavement paved through method - Google Patents
Treatment method between stone planting type layers and compound pavement paved through method Download PDFInfo
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Abstract
The invention discloses a treatment method between stone planting type layers and a compound pavement paved through the method. A cement concrete layer is laid on a base layer, and then, after the cement concrete layer is paved and vibrated, and before cement concrete is initially set, aggregates are evenly spread on the cement concrete layer and are partly embedded in the cement concrete layer; and through curing, a bituminous concrete layer is paved. The aggregates reserved on the concrete layer are partly exposed out to form a coarse surface, and a good biting interlocking effect can be formed by the coarse surface and bituminous concrete paved following the coarse surface, so that the higher anti-shearing and binding performance aim is achieved; when SBS modified asphalt is adopted, the anti-shearing strength of the treatment manner is 0.727MPa; compared with groove notching, the anti-shearing strength is improved by 58.7 percent; and compared with chiseling, the anti-shearing strength is improved by 71.4 percent.
Description
Technical field
The invention belongs to highway field, be specifically related to the composite pavement that a kind is planted stone formula interlayer Treatment Methods and the method making.
Background technology
The composition of stiff-flexible bonding pavement structure: major part is formed overlay bituminous mixture on cement concrete slab after, main feature is that the overall structure rigidity on road surface is large, good stability, driving comfort, well a lot of relative to single cement concrete pavement.Its structure forms mainly asphalt surface course+tack coat+cement concrete slab+basic unit.The material of stiff-flexible bonding pavement composition structure differs greatly, and upper layer bituminous mixture belongs to viscoelastic material, and cement concrete slab below belongs to elastomeric material.The modulus difference of both materials is very large, thus causes stiff-flexible bonding pavement to be easy to occur the infringements such as passing, stripping at temperature and load action.Therefore, in stiff-flexible bonding pavement use procedure, the overwhelming majority is because the inefficacy of hard and soft boundary layer or strength deficiency cause.
The mechanical snap effect that what boundary layer shear resistance mainly relied on is between shaggy cement concrete slab and surface layer bituminous mixture, and the shear strength that boundary layer material therefor provides itself is limited.For the adhesion strength of boundary layer, the main caking property relying on shaggy cement concrete slab and boundary layer binding material.Therefore, good coarse process is carried out for Rigid-flexible composite of the road structural interface, select suitable intermediate layer binding material and suitable interface punishment mode, being the interlocking occlusion improved between the upper and lower two kinds of different materials of Rigid-flexible composite of the road and the key factor bondd, is also the important measures preventing asphalt surface course from producing slippage and stripping damage under the effect of vehicular load.
Along with the application of stiff-flexible bonding pavement is more and more extensive, and at present in pitch and cement pavement specification to regulation not clear and definite in composite pavement intermediate layer processing mode method, cause in reality varied to the punishment mode of boundary layer, its effect is had nothing in common with each other, stiff-flexible bonding pavement boundary layer punishment mode conventional at present has: blasting treatment, milling, plucking, cutting etc., and the use of interlayer materials mainly contains: sticking layer oil, geotextiles (glass fiber grid, Fibergrass polyester mat etc.), Sub-sealing Course (sand asphalt sealing, slurry seal, crushed stone sealing) etc.More tightr than general process through composite pavement being made to bond to the use of the punishment of cement concrete interface and interlayer materials, but it is all select different interlayer materials according to different roads, and these materials have respective pluses and minuses simultaneously.But these technology for Heavy Traffic when, due to its interlocking occlusion scarce capacity, be difficult to the shear deformation breaks down avoiding horizontal loading to bring, modal is that mode of failure is interlayer slip, gathers around the diseases such as bag.
Summary of the invention
In order to overcome deficiency of the prior art, the object of the present invention is to provide a composite pavement of planting stone formula interlayer Treatment Methods and the method making, this composite pavement has stronger anti-shearing deformability.
For achieving the above object, the present invention adopts following technical scheme:
Plant stone formula interlayer Treatment Methods for one kind, making cement concrete layer in basic unit, then after cement concrete layer paves and vibrated, before cement concrete initial set, to gather materials and evenly be dispensed onto on cement concrete layer, and aggregate fractions is embedded in cement concrete layer, and after health, making asphalt concrete layer.
Described gathering materials has wrapped contraction-free grouting concrete.
Described contraction-free grouting concrete wrap surface of aggregate long-pending more than 95%.
Describedly to gather materials for the rubble of single particle size 9.5mm ~ 19mm.
The degree of depth that described aggregate fractions embeds in cement concrete layer is 2/3rds of aggregate size.
The described spreading area gathered materials is 75 ~ 85% of cement concrete layer area.
One deck sticking layer oil is sprayed at cement concrete surface before described making asphalt concrete layer.
During described sprinkling sticking layer oil, if spray SBR modified emulsifying asphalt, then SBR modified emulsifying asphalt spread quantity is 0.5 ~ 0.7kg/m
3; If when spraying SBS modified bitumen, then SBS modified bitumen spread quantity is 0.3 ~ 0.5kg/m
3.
Plant the composite pavement of stone formula interlayer Treatment Methods making, comprise basic unit, in basic unit, making has cement concrete layer, cement concrete layer is provided with and is embedded into gathering materials in cement concrete layer, and the degree of depth be embedded in cement concrete layer of gathering materials is 2/3rds of aggregate size, the upper making that gathers materials has asphalt concrete layer.
Described bituminous concrete layer thickness is 4 ~ 6cm, and cement concrete layer thickness is 25 ~ 30cm.
Compared with prior art, the beneficial effect that the present invention has: the present invention is by before cement concrete initial set, to gather materials to be embedded in cement concrete layer and interface will be processed, it is a kind of method of in stiff-flexible bonding pavement, cement concrete layer being carried out to roughening process, until after concrete curing a couple of days, the mortar of concrete surface is cleaned out, the aggregate fractions stayed on layer of concrete is exposed, form comparatively coarse surface, can be formed with the bituminous concrete paved subsequently and well be engaged interlock action, reach the object of stronger anti-shearing and adhesive property.In several with other by lab shear strength test, common interlayer is punished and is compared, when adopting SBS modified bitumen, the shear strength of punishment mode of the present invention is 0.727MPa, than the shear strength large 58.7% during employing cutting, than the shear strength 71.4% during employing dabbing.According to SBR modified emulsifying asphalt, the shear strength value of the composite pavement of Treatment Methods making of the present invention is adopted to be 0.706MPa, than the shear strength large 62.3% during employing cutting, than the shear strength large 81.9% during employing dabbing.
Further, the present invention is embedded into gathering materials in cement concrete layer by arranging on cement concrete layer, and the height embedded is 2/3rds of aggregate size, the composite pavement of such formation is be embedded in cement concrete layer owing to gathering materials, so the roughness of cement concrete surface can be strengthened, then spray sticking layer oil, making asphalt concrete layer, finally obtain composite pavement, the composite pavement obtained has stronger anti-shear ability.
Gather materials owing to embedded on cement concrete layer in composite pavement of the present invention, so the roughness of composite pavement can be increased, and then the interlocking occlusion ability that improve between cement concrete layer and asphalt concrete layer, avoid the shear deformation breaks down that horizontal loading brings.
Accompanying drawing explanation
Fig. 1 is composite road surface structure schematic diagram.
Fig. 2 is for planting the rear structural representation of stone formula punishment.
Wherein, 1 is asphalt concrete layer, and 2 is tack coat, and 3 is cement concrete layer, and 4 is basic unit, and 5 gather materials.
Detailed description of the invention
Describe the present invention below in conjunction with accompanying drawing.
See Fig. 1, the invention provides one kind and plant stone formula interlayer Treatment Methods, making cement concrete layer 3 in basic unit 4, then carry out planting stone punishment on cement concrete layer 3, planting stone punishment detailed process is: after cement concrete layer 3 paves and vibrated, and before cement concrete initial set, clean single particle size is gathered materials and 5 evenly wraps up in the general contraction-free grouting concrete of attached boss's glue, and contraction-free grouting concrete wraps more than 95% of 5 surface areas that gather materials, being gathered materials by single particle size by crushed stone spreading equipment 5 is evenly dispensed onto on cement concrete layer 3 again, then compacting equipment is adopted to be pressed in cement concrete by aggregate fractions, press-in effect is shown in Fig. 2, the degree of depth embedded in cement concrete layer 3 of gathering materials is 2/3rds of 5 particle diameters that gather materials, wherein, gathering materials for the rubble of single particle size 9.5mm ~ 19mm in cement concrete layer 3 is embedded into.After health after a while, first the cement concrete layer 3 through planting stone punishment is cleaned, carry out the making of asphalt concrete layer 1 after cleaning is clean, and before making, asphalt concrete layer 1, at the good sticking layer oil of cement concrete layer 3 surface sprinkling one deck caking property, forms adhesive linkage 2.
The spreading area of above-mentioned rubble is 75 ~ 85% of cement concrete layer area.
Adopt the composite pavement of said method making, comprise basic unit 4, in basic unit 4, making has cement concrete layer 3, cement concrete layer 3 is provided be embedded into and gathers materials 5 in cement concrete layer 3, and 5 degree of depth be embedded in cement concrete layer 3 of gathering materials are 2/3rds of aggregate size, the making again that to gather materials on 5 after making adhesive linkage 2 has asphalt concrete layer 1.Described asphalt concrete layer 1 thickness is 4 ~ 6cm, and cement concrete layer 3 thickness is 25 ~ 30cm, and the thickness of adhesive linkage 2 is 1cm.
It is a kind of method of in stiff-flexible bonding pavement, cement concrete slab face being carried out to roughening process that the present invention processes interface.Its process is: after stiff-flexible bonding pavement cement concrete slab paves and vibrated, before cement concrete initial set, clean single particle size is gathered materials and first evenly wraps up in the general contraction-free grouting concrete of attached boss's glue, re-use crushed stone spreading equipment afterwards to be evenly dispensed onto on cement concrete slab, adopt compacting equipment will gather materials in setting-out cement concrete subsequently, insert depth is roughly 2/3rds of aggregate size, until the mortar of concrete surface is cleaned out after concrete curing a couple of days, make to stay gathering materials of 1/3rd on concrete slab to expose, form comparatively coarse surface, can be formed with the bituminous mixture paved subsequently and well be engaged interlock action, reach the object of stronger anti-shearing and adhesive property.
Specific construction process of the present invention is:
(1) preparation of construction
Plant stone material requested and should carry out site acceptance by the regulation of related specifications, guarantee the quality and quantity of all material, building stones particle diameter is 9.5 ~ 19mm, gathers materials 5 preferably to have good corner angle, has and gathering materials of shiny surface forbids to adopt.Cause the bonding of interlayer insecure in order to avoid the unholiness of material, simultaneously in order to ensure there are enough shear resistances between cement concrete layer 3 and asphalt concrete layer 1, first must will gather materials with clear water and 5 to clean, the dust on removing surface, gathering materials of making afterwards to clean 5 mixes with the general contraction-free grouting concrete of boss's glue, make building stones wrap up in attached completely with the general contraction-free grouting concrete of boss's glue as far as possible, reach as far as possible and wrap up in attached area more than 95%.
(2) spreading building stones, plant stone punishment
First in basic unit 4, making cement concrete slab is wanted during making, form cement concrete layer 3, until the layer of concrete 3 initial set moment, crushed stone spreading equipment is used boss's glue to be wrapped up in the attached good 5 even spreadings as far as possible that gather materials, with compacting equipment, building stones are depressed subsequently, the thickness making building stones embed cement concrete layer 3 is roughly 2/3rds of aggregate size, whether the cement concrete surface observed subsequently after pressing is even, uneven place needs benefit to spread building stones, direct crooked chisel is depressed, the area that spreading gathers materials is that 75% ~ 85% of cement concrete layer 3 area is advisable.
(3) health
Plant after lapicide's skill completes, on cement concrete layer 3, carry out health with covered rearing with plastic film immediately, also need to use the straw bag that soaks or geotextiles to cover and carry out maintenance, regularly watering is with crack resistence, after curing time (12 days ~ 16 days) is full, overburden can be removed.
(4) surface cleaning
After health terminates, using cleaning equipment to carry out cleaning 2 ~ 3 times to planting stone section, loosening particle and spot with clear board face, seriously locate suitably to increase cleaning pass and clean up with water to spot, then dry with high pressure wind.
(5) sticking layer oil is sprayed
Use pitch sprinkling car spray sticking layer oil, according to SBR modified emulsifying asphalt, pitch sprinkling amount is 0.6kg/m
3(domain of walker 0.1kg/m
3); According to SBS modified bitumen time, pitch sprinkling amount is 0.4kg/m
3(domain of walker 0.1kg/m
3).
(6) the paving of bituminous mixture, roll
Paving of asphalt concrete layer 1 requires all to meet " standard specification for construction and acceptance of highway asphalt pavement " (JTGF40-2004).
Through above-mentioned work progress, final formation stiff-flexible bonding pavement structure, the composite road surface structure formed has better shear resistance than the composite road surface structure after general interlayer punishment.
During the present invention is simultaneously several with other by lab shear strength test, common interlayer punish and is compared, and common interlayer adds sticking layer oil after punishing and comprising cement concrete dabbing, and cement concrete cutting adds sticking layer oil.Testing program is in table 1:
Table 1 testing program
The technical indicator of SBS modified bitumen and SBR modified emulsifying asphalt is in table 2 and table 3.
Table 2SBS modified asphalt technology index
Table 3SBR modified emulsifying asphalt technical indicator
| Interventions Requested | Unit | Measured value | Normal value |
| Viscosity (standard path viscometer C25.3) | s | 15.2 | 15-25 |
| Evaporated residue | ％ | 58 | ＞50 |
| Needle penetration (25 DEG C, 100g, 5s) | 0.1mm | 58 | 40-120 |
| Ductility (5cm/min, 5 DEG C) | cm | 37 | ＞20 |
| Softening point | ℃ | 67.5 | ＞50 |
This experiment is by the shear strength of multifunction road material boxshear apparatus at normal temperatures between test layer.Checked before on-test and guarantee that plant and instrument works well, upper and lower shearing die is aligned, fixes bed die.Then test specimen is put into mould, adjusting base height, make test specimen interlayer just be in mould seam crossing.At room temperature, opening device carries out horizontal shear to test specimen until destroy, and records horizontal shear during destruction.
Shear strength calculation formula is as follows:
In formula: τ---shear strength (MPa);
F---horizontal shear (N);
S---shearing area (m
2), be test specimen cross-sectional area.
Test specimen shaping:
The test of composite pavement shearing strength at intersection says that the shaping method of specimen step wanted is as follows:
1, shaping C40 cement concrete slab
Shaping C40 cement concrete slab in the rut plate die trial of 300mm × 300mm × 50mm, concrete grammar is with reference to " highway engineering cement and cement concrete testing regulation " (JTG E30-2005).
2, cement board surfacing
Surfacing should be ensured during shaping cement concrete slab, first surface galling is carried out with scrub-brush when initial set, to remove cement concrete surface laitance, then cutting, dabbing process and punishment of the present invention is carried out respectively, last maintenance at the standard conditions 7 days, intensity should reach more than 80% of normal intensity.
3, spread bonding layer material
After cement concrete slab good for maintenance drying, surface cleaning, according to calculating consumption all kinds of binding material of difference uniform application on the cement concrete slab handled well, lie against clean, dry locating, use after cooling completely.
4, AC-13 asphalt concrete layer is overlayed
Loaded in the rut plate die trial of 300mm × 300mm × 100mm smear the coagulating cement upper plate after binding material, AC-13 bituminous mixture heat mixed is contained in die trial, be placed on the bituminous concrete plate that roller-compaction 5cm on rolling instrument is thick, after bituminous sheaths laminate cool to room temperature, pull down die trial.
5, core is bored
Go out the core of little 10cm × 10cm with brill core machine drill, every block doubling plate bores at most 4 cores.
Test result analysis:
In this testing program, adhesion coating adopts SBS modified bitumen and SBR modified emulsifying asphalt respectively, and sticking material chooses 4 kinds of consumptions: i.e. 0.2kg/m
2, 0.4kg/m
2, 0.6kg/m
2, 0.8kg/m
2, as previously mentioned, shear test temperature is 25 DEG C, carries out shear test respectively to the composite samples of forming.Result of the test is respectively in table 4 ~ table 9.
The shear strength of table 4 the present invention under SBS modified asphalt conditions
The shear strength of table 5 cutting under SBS modified asphalt conditions
The shear strength of table 6 dabbing under SBS modified asphalt conditions
The shear strength of table 7 the present invention under SBR modified emulsifying asphalt condition
The shear strength of table 8 cutting under SBR modified emulsifying asphalt condition
The shear strength of table 9 dabbing under SBR modified emulsifying asphalt condition
Can be obtained by table 4 ~ table 9:
When adopting SBS modified bitumen, the shear strength of punishment mode of the present invention is maximum, is 0.727MPa, and now the spread quantity of pitch is 0.4kg/m
2, than the maximum value 0.458MPa large 58.7% of shear strength during employing cutting, than the maximum value 0.414MPa large 71.4% of shear strength during employing dabbing.
According to SBR modified emulsifying asphalt, the shear strength value of same punishment mode of the present invention is also maximum, is 0.706MPa, and now the spread quantity of pitch is 0.6kg/m
2, than the maximum value 0.435MPa large 62.3% of shear strength during employing cutting, than the maximum value 0.388MPa large 81.9% of shear strength during employing dabbing.
As can be seen from content above, when cement board surface plate adopts method of the present invention to punish, more much bigger than the shear strength corresponding to other two kinds of cement board surface treatment modes.Construction depth of the present invention is more much bigger than other two kinds of construction depths, and exposed rubble can be good at together with interlocking with the aggregate in bituminous mixture, thus shear strength is increased dramatically.
Claims (10)
1. plant stone formula interlayer Treatment Methods for one kind, it is characterized in that, at the upper making cement concrete layer (3) of basic unit (4), then after cement concrete layer (3) paves and vibrated, before cement concrete initial set, will gather materials (5) are evenly dispensed onto on cement concrete layer (3), and are embedded into by aggregate fractions in cement concrete layer (3), after health, making asphalt concrete layer (1).
2. plant stone formula interlayer Treatment Methods for one kind according to claim 1, it is characterized in that, described in gather materials (5) wrapped contraction-free grouting concrete.
3. plant stone formula interlayer Treatment Methods for one kind according to claim 2, it is characterized in that, described contraction-free grouting concrete wraps more than 95% of (5) surface area that gathers materials.
4. plant stone formula interlayer Treatment Methods for one kind according to claim 1 and 2, it is characterized in that, described in gather materials for the rubble of single particle size 9.5mm ~ 19mm.
5. plant stone formula interlayer Treatment Methods for one kind according to claim 4, it is characterized in that, the degree of depth that described aggregate fractions embeds in cement concrete layer (3) is 2/3rds of aggregate size.
6. plant stone formula interlayer Treatment Methods for one kind according to claim 1, it is characterized in that, described in the spreading area that gathers materials be 75 ~ 85% of cement concrete layer area.
7. plant stone formula interlayer Treatment Methods for one kind according to claim 1, it is characterized in that, described making asphalt concrete layer (1) is front at cement concrete layer (3) surface sprinkling one deck sticking layer oil.
8. plant stone formula interlayer Treatment Methods for one kind according to claim 7, it is characterized in that, during described sprinkling one deck sticking layer oil, if spray SBR modified emulsifying asphalt, then SBR modified emulsifying asphalt spread quantity is 0.5 ~ 0.7kg/m
3; If when spraying SBS modified bitumen, then SBS modified bitumen spread quantity is 0.3 ~ 0.5kg/m
3.
9. composite pavement of planting stone formula interlayer Treatment Methods making according to claim 5, it is characterized in that, comprise basic unit (4), the upper making of basic unit (4) has cement concrete layer (3), cement concrete layer (3) is provided with gather materials (5) be embedded in cement concrete layer (3), and the degree of depth that gather materials (5) are embedded in cement concrete layer (3) is 2/3rds of aggregate size, gather materials (5) upper making has asphalt concrete layer (1).
10. composite pavement of planting stone formula interlayer Treatment Methods making according to claim 9, it is characterized in that, described asphalt concrete layer (1) thickness is 4 ~ 6cm, and cement concrete layer (3) thickness is 25 ~ 30cm.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107059529A (en) * | 2017-01-16 | 2017-08-18 | 湖南大学 | Embedding stone structure and construction method between ultra-high performance concrete surface and upper layer |
| CN108705653A (en) * | 2018-07-24 | 2018-10-26 | 辽宁科技大学 | A kind of method of road deck making apparatus and the compound block road deck of the equipment making |
| CN108978388A (en) * | 2018-07-24 | 2018-12-11 | 辽宁科技大学 | A kind of anti-passage salt tolerant erosion composite block material tube panel of assembled and construction technology |
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| CN111537418A (en) * | 2020-04-27 | 2020-08-14 | 哈尔滨工业大学 | Method for evaluating grouting performance of cement asphalt composite concrete cementing material |
| CN113584989A (en) * | 2021-08-23 | 2021-11-02 | 中冶南方城市建设工程技术有限公司 | Interlayer combination structure and method for reinforcing rigid-flexible composite pavement |
| CN114481730A (en) * | 2021-12-28 | 2022-05-13 | 山东高速股份有限公司 | Construction method of full-thickness type road subgrade connecting layer structure |
| CN114369980A (en) * | 2022-01-19 | 2022-04-19 | 北方道路科技(辽宁)有限公司 | Pouring type composite concrete pavement construction process |
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Application publication date: 20150916 |
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| RJ01 | Rejection of invention patent application after publication |