CN107386039A - The remodeling method of Old cement concrete - Google Patents
The remodeling method of Old cement concrete Download PDFInfo
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- CN107386039A CN107386039A CN201610325409.XA CN201610325409A CN107386039A CN 107386039 A CN107386039 A CN 107386039A CN 201610325409 A CN201610325409 A CN 201610325409A CN 107386039 A CN107386039 A CN 107386039A
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- Prior art keywords
- overlay
- cement concrete
- asphalt
- remodeling method
- old cement
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Classifications
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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
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/35—Toppings or surface dressings; Methods of mixing, impregnating, or spreading them
- E01C7/353—Toppings or surface dressings; Methods of mixing, impregnating, or spreading them with exclusively bituminous binders; Aggregate, fillers or other additives for application on or in the surface of toppings with exclusively bituminous binders, e.g. for roughening or clearing
Abstract
The present invention is a kind of remodeling method of Old cement concrete, Old cement concrete overhauling reform has good several method, asphalt finishing coat is overlayed most commonly on road surface, the greatest drawback of this method is that asphaltum concrete cover-layer reflection crack easily occurs in corresponding old pavement plate seam crossing.The defects of to overcome the remodeling method of above-mentioned Old cement concrete, the technical problems to be solved by the invention are to provide a kind of remodeling method that Old cement concrete repaving asphalt coat can be overcome to produce reflection crack.The remodeling method that the present invention solves above-mentioned technical problem comprises the following steps：Selection, to Old cement concrete repaving asphalt coat, is then modified processing to the pitch of overlay, then the thickness of overlay is controlled during overlay again under suitable temperature environment.
Description
【Technical field】
The present invention relates to a kind of remodeling method of Old cement concrete, including asphalt overlay low temperature to pave
Step, overlay thickness selection step, asphalt modification processing step.
【Background technology】
Old cement concrete overhauling reform has good several method, but drip is most commonly overlayed on road surface
Blue or green compound finishing coat, this method is not only simple and convenient, can be efficiently modified making for Old cement concrete
With performance, and short time limit, cost relative moderate, to traffic and the influence very little of environment；Carry out reinforcement recovery
Road surface afterwards is related to rigidity, the composite construction form on flexible two kinds of road surfaces, and this composite road surface structure is most prominent
The Cement Concrete Pavement Slab that advantage is its lower floor and has high intensity makees basic unit, larger so as to bear
Vehicular load, the asphalt overlay on upper strata can significantly improve pavement usage quality, reduce noise and airborne dust again,
Rut is not likely to produce, strengthens the comfortableness and security of driving；Defect is that the material property of surface layer above and below road surface is poor
Different very big, Old cement concrete plate is influenceed very big by temperature change, and is deposited on old concrete panel
In crack and seam, with faulting of slab ends, come to nothing phenomena such as, under load stress and temperature stress collective effect, drip
Blue or green finishing coat is corresponding to old pavement plate seam, and reflection crack easily occurs in the position in crack, once face is run through in crack
Layer, asphalt surface course purt slurry, Water Damage are caused, causes asphalt surface course further to ftracture, greatly shortens asphalt overlay
The service performance of layer and service life.
【The content of the invention】
The defects of to overcome the remodeling method of above-mentioned Old cement concrete, technology to be solved by this invention
Problem be to provide one kind can overcome it is old
Cement Concrete Pavement bitumen layer produces the remodeling method of reflection crack.
The remodeling method that the present invention solves above-mentioned technical problem comprises the following steps：Selection is in suitable temperature ring
To Old cement concrete repaving asphalt coat under border, processing, Ran Houzai then are modified to the pitch of overlay
The thickness of overlay is controlled during overlay.
Old cement concrete repaving asphalt coat must be chosen to be at below more than 5 DEG C 10 DEG C of natural temperature, most
Fortunately late autumn or season early winter are advisable.The thermal expansion value of cement concrete, shrinkage value with aggregate species, content,
The factors such as the age of concrete influence have the thermal expansion of certain difference regular tenacity C30 concrete, shrinkage value to lead to
Overtesting material is in elongated lengthwise or shortens 11.59*10-6 millimeters, that is, 0.01159 millimeter/DEG C
·m.When 100 meters of cement concrete plate temperatures of length are often raised and lowered 1 DEG C, length elongation or shortening 1mm,
At about 4 DEG C, moisture protonatomic mass is minimum, and now the quality of concrete plate tends to smaller state.Old coagulating cement
Soil surface seam crossing can not bear tension, be mainly that temperature reduction plate contraction in length draws through analyzing tension
Rise.Through overtesting and measuring and calculating, the repaving asphalt coat below more than 5 DEG C 10 DEG C of natural temperature is selected so that old
The every 6 meters of length of cement concrete pavement shrinkage value caused by temperature is less than or equal to 0.36mm.
As the further improvement of Old cement concrete remodeling method of the present invention, plain asphalt material is entered
Row modification, by adding appropriate plastic pellet and banaina in ac25 plain asphalts compound, so as to
So that it has micro elasticity and the latitude of emulsion, and overlay is less than or equal in 6 meters of the interior of length in temperature
The latitude of emulsion is more than or equal to 0.36mm at 4 DEG C.
Another kind as Old cement concrete remodeling method of the present invention improves, and asphalt overlay thickness is determined
For 12cm.The thickness of overlay must be controlled in Old cement concrete repaving asphalt coat.Reflection
The expansion rate in crack has much relations with asphalt overlay thickness, in general thicker its of overlay prevent or
The effect in delayed reflex crack is better, and the time that crack expands to road surfaces is longer, but overlay also can not
Unlimited it can thicken, when it is economically infeasible, second, overlay is blocked up easily to produce rut, influence road surface
Performance.By the experiment to asphalt overlay thickness and the relation of traffic load stress and to asphalt overlaying
Thickness degree is tested to form following three tables with the influence to flexure at plate stitch：
The asphalt overlay top strain value of table 1
Unit Pa
| Asphalt overlay thickness | 4 | 6 | 8 | 10 | 12 | 14 | 16 |
| σx | 357877 | 291967 | 245952 | 211429 | 184479 | 162942 | 145483 |
| σy | 459542 | 385479 | 331541 | 28135 | 251245 | 219252 | 191447 |
| σz | 207427 | 147619 | 108504 | 82283 | 64678 | 53023 | 45527 |
| σ1 | 196503 | 119621 | 99537 | 73230 | 54709 | 42026 | 33391 |
| σ2 | 205403 | 149689 | 132349 | 126497 | 116501 | 104583 | 92297 |
| σ3 | 722940 | 558454 | 454111 | 382121 | 329193 | 288609 | 256768 |
| σe | 579710 | 425809 | 339360 | 286003 | 249397 | 222016 | 200521 |
| τmax | 307891 | 211501 | 155695 | 122012 | 101253 | 88424 | 80626 |
The asphalt overlay bottom stress value of table 2
Unit Pa
| Asphalt overlay thickness | 4 | 6 | 8 | 10 | 12 | 14 | 16 |
| σx | 424347 | 405639 | 393627 | 383936 | 374647 | 365057 | 355039 |
| σy | 876283 | 836854 | 801510 | 768840 | 737800 | 708240 | 680217 |
| σz | 308432 | 304670 | 302690 | 300270 | 296495 | 291185 | 284529 |
| σ1 | 179082 | 86226 | 187796 | 185171 | 79682 | 172435 | 164272 |
| σ2 | 310680 | 307708 | 306671 | 305193 | 302240 | 297578 | 291390 |
| σ3 | 1119290 | 1052960 | 1003360 | 962682 | 927019 | 894469 | 864123 |
| σe | 881804 | 812828 | 763103 | 724990 | 694220 | 668309 | 645745 |
| τmax | 410521 | 373467 | 349521 | 333019 | 320661 | 310631 | 301919 |
Influence of the asphalt overlay thickness of table 3 to flexure at plate stitch
| Asphalt overlay thickness | 4 | 6 | 8 | 10 | 12 | 14 | 16 |
| Load side deflection value U1 | 1.21907 | 1.20211 | 1.18203 | 1.16041 | 1.13759 | 1.11504 | 1.09192 |
| Deflection value U2 is not loaded | 1.37695 | 1.3383 | 1.30412 | 1.30412 | 1.24146 | 1.21173 | 1.18279 |
| Flexure is poor | |||||||
| Δ U=U2-U1 | 0.15788 | 0.13619 | 0.12209 | 0.12209 | 0.10387 | 0.09669 | 0.09087 |
By analysis, by result of calculation it can be seen that the maximum principal stress σ 1 of asphalt overlay, equivalent stress σ e,
Maximum shear stress τ max can be in reduction trend with the increase of overlay thickness, and overlay thickness is increased by 4cm
When being added to 10cm, the stress in asphalt overlay is quickly reduced, and maximum principal stress σ 1 is equivalent at the top of overlay
Stress σ e, maximum shear stress all reduce clearly.The thickness that this illustrates to increase asphalt overlay is to subtracting
Stress in small overlay is obvious.In addition, flexure and plate stitch both sides flexure of the overlay at plate stitch are poor
With asphalt overlaying layer thickness variation.
When the thickness of overlay increases to 16cm by 4cm, deflection value, the flexure of asphalt overlay plate stitch both sides
Difference all gradually decreases.Wherein loading the pavement deflection of side reduces 10.44%, non-load side pavement deflection drop
Low 14.11%, both sides flexure subtractive few 42.5%.Seam crossing can be reduced when increasing asphalt overlay thickness
The shear stress of asphalt overlay and deformation, the possibility that reflection crack occurs is reduced, considers anticracking and warp
The two aspect overlay thickness that help are 12cm.
【Embodiment】
The embodiment of the remodeling method of Old cement concrete of the present invention mainly includes four steps：
Disease Processing is carried out before bitumen layer overlays to Old cement concrete, selects suitable natural temperature, to drip
Green grass or young crops is modified processing, control thickness.
The implementation requirement of the remodeling method of the Old cement concrete of the present invention carries out disease before bitumen layer overlays
Harm reason is necessary, is handled by panel, crack, seam reinforcement so that old pavement plate stably obtains guarantor
Card, overlay road surface is set to have a well stable working condition.Crushed for serious fracture and depression is broken
Seriously peeled off very much at panel, crack and have cleavage block, faulting of slab ends has begun to the disconnected plate of activity, through full plate
Cross fracture, use and excavate the treatment measures that old plate constructs new plate.Exceed for seam both sides plate flexure difference
0.06 seam will take strengthening measure, and in order to recover the load transfer power of adjacent plate, it is heavy poor to reduce, it two
Full depth cutting is made on side in the range of each 30cm-50cm of size depending on flexure difference, remove the old plate of cutting, range estimation
Basic unit, if any loosely removing in the lump.Taken for seam of the flexure difference less than 0.06mm of seam both sides plate
Joint-cutting, raked joint, are poured with hot asphalt mixture.For actual measurement one point deflection value more than 0.4mm, come to nothing serious
Plate, to excavate according to broken, newly build the processing of plate, to actual measurement one point deflection value in 0.2mm and 0.4mm
Between plate, cement grout injected under slab should be taken to handle.No thoroughfare for vehicles for plate after the completion of mud jacking, until mortar is strong
Degree reaches 5Mpa ability open to traffic.After mud jacking is completed 3 days, the rebound deflection value of mud jacking plate corner is measured again,
It is worth as gulf is heavy in the range of mud jacking, plate answers redrilling ftercompction.Finally by setting intermediate course to old cement
The horizontal displacement on road surface is controlled, and as interlayer, it does not only have prioritizing selection Hh-3 polyester glass fibres Compound Fabric
Stronger tensile strength, moreover it is possible to eliminate polyester glass fibre Compound Fabric and failure by shear caused by asphalt overlaying bed boundary.
One of important step that the remodeling method of the Old cement concrete of the present invention is implemented is old coagulating cement
Soil surface repaving asphalt coat, preferably carried out in late autumn or season early winter, it is necessary in more than 5 DEG C 10 DEG C of natural temperature
Carry out below.
The remodeling method of the Old cement concrete of the present invention has by being modified processing to plain asphalt
Body is by adding appropriate plastic pellet and banaina in ac25 plain asphalts compound, so that it has
Micro elasticity and the latitude of emulsion, and cause overlay latitude of emulsion within 6 meters of length to be more than or equal to 0.36mm.In ac25
Need to control the size when plain asphalt compound adds plastic pellet and banaina, it is ensured that above-mentioned exhibition can be reached
While spending, and do not influence to overlay stiffness layer.
12cm is overlayed in overlay, is divided two layers, bottom 8cm, surface layer 4cm.Bottom, which overlays, passes through modification
Pitch so that overlay bottom latitude of emulsion within 6 meters of length is more than or equal to 0.36mm so that overlay
Bottom possesses leveling and strengthening function, with more stress absorption function, so as to solve the reflection crack caused by temperature
Problem.
Claims (4)
1. a kind of remodeling method of Old cement concrete, it includes：Asphalt overlay low temperature paves, is thick
Degree control, asphalt modification processing so that the every 6 meters of length of Old cement concrete is shunk caused by temperature
Value is less than or equal to 0.36mm, and causes overlay latitude of emulsion within 6 meters of length to be more than or equal to 0.36mm.
2. such as the remodeling method of claim 1, it is characterised in that：It is choosing that the asphalt overlay low temperature, which paves,
Select the repaving asphalt coat below more than 5 DEG C 10 DEG C of natural temperature so that Old cement concrete is every 6 meters long
Degree shrinkage value caused by temperature is less than or equal to 0.36mm.
3. such as the remodeling method of claim 1, it is characterised in that：The thickness control is overlayed in overlay
12cm, divide two layers, bottom 8cm, surface layer 4cm.
4. such as the remodeling method of claim 1, it is characterised in that：The asphalt modification processing is by ac25
Plain asphalt compound adds appropriate plastic pellet and banaina so that overlay in 6 meters of length
The latitude of emulsion is more than or equal to 0.36mm when temperature is less than or equal to 4 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610325409.XA CN107386039B (en) | 2016-05-17 | 2016-05-17 | Method for modifying old cement concrete pavement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610325409.XA CN107386039B (en) | 2016-05-17 | 2016-05-17 | Method for modifying old cement concrete pavement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107386039A true CN107386039A (en) | 2017-11-24 |
| CN107386039B CN107386039B (en) | 2021-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610325409.XA Expired - Fee Related CN107386039B (en) | 2016-05-17 | 2016-05-17 | Method for modifying old cement concrete pavement |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109024135A (en) * | 2018-08-15 | 2018-12-18 | 江西博慧工程技术服务有限公司 | A kind of concrete road surface green upgradeable architecture and remodeling method |
| CN113718611A (en) * | 2021-09-09 | 2021-11-30 | 鲁国俊 | Road surface reconstruction system and method for old road surface reconstruction |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2247110A1 (en) * | 1971-09-27 | 1973-04-26 | Nichireki Chem Ind Co | BITUMINOESE EMULSION |
| CN1472243A (en) * | 2002-07-30 | 2004-02-04 | 中国石油化工股份有限公司 | Old road pitch modifying regenerant and preparing method thereof |
| CN1499017A (en) * | 2002-11-04 | 2004-05-26 | 蓝派冲击压实技术开发(北京)有限公司 | Method for reconditioning road surface by using asphalt rubber |
| CN102733284A (en) * | 2011-12-23 | 2012-10-17 | 上海浦东路桥建设股份有限公司 | Double-layer rubber asphalt concrete structure for inhibiting reflection cracks of pavement and pavement method |
| CN103669153A (en) * | 2013-12-31 | 2014-03-26 | 山东卓洋机电科技有限公司 | Low-temperature micro-surfacing construction technology |
-
2016
- 2016-05-17 CN CN201610325409.XA patent/CN107386039B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2247110A1 (en) * | 1971-09-27 | 1973-04-26 | Nichireki Chem Ind Co | BITUMINOESE EMULSION |
| CN1472243A (en) * | 2002-07-30 | 2004-02-04 | 中国石油化工股份有限公司 | Old road pitch modifying regenerant and preparing method thereof |
| CN1499017A (en) * | 2002-11-04 | 2004-05-26 | 蓝派冲击压实技术开发(北京)有限公司 | Method for reconditioning road surface by using asphalt rubber |
| CN102733284A (en) * | 2011-12-23 | 2012-10-17 | 上海浦东路桥建设股份有限公司 | Double-layer rubber asphalt concrete structure for inhibiting reflection cracks of pavement and pavement method |
| CN103669153A (en) * | 2013-12-31 | 2014-03-26 | 山东卓洋机电科技有限公司 | Low-temperature micro-surfacing construction technology |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109024135A (en) * | 2018-08-15 | 2018-12-18 | 江西博慧工程技术服务有限公司 | A kind of concrete road surface green upgradeable architecture and remodeling method |
| CN109024135B (en) * | 2018-08-15 | 2020-07-24 | 江西博慧工程技术服务有限公司 | Green upgrading structure and modification method for concrete pavement |
| CN113718611A (en) * | 2021-09-09 | 2021-11-30 | 鲁国俊 | Road surface reconstruction system and method for old road surface reconstruction |
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| Publication number | Publication date |
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| CN107386039B (en) | 2021-03-02 |
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