CN104177846B - Injecting paste material, grouting method and road maintenance method for maintaining - Google Patents
Injecting paste material, grouting method and road maintenance method for maintaining Download PDFInfo
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- CN104177846B CN104177846B CN201410374998.1A CN201410374998A CN104177846B CN 104177846 B CN104177846 B CN 104177846B CN 201410374998 A CN201410374998 A CN 201410374998A CN 104177846 B CN104177846 B CN 104177846B
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Abstract
The invention discloses a kind of injecting paste material, grouting method and road maintenance method for maintaining.Described injecting paste material adopts following raw material to prepare: described raw material includes hard grades of bitumen, Sha Suobide, SBS modifier and Colophonium master batch；The Con trolling index of described injecting paste material is: Asphalt Penetration is less than 10, and asphalt softening point is 85 DEG C～93.5 DEG C, and the dissolubility in trichloro ethylene is more than 99.3%.Injecting paste material good fluidity provided by the present invention, Financial cost is low, and setting rate is fast；When being applied to road maintenance maintenance, it is not necessary to maintenance, it is possible to open to traffic at once.Effect before slip casting, in slip casting process and after slip casting can be carried out effectively evaluating by road maintenance method for maintaining provided by the invention, overcomes the defect of the micro-judgment of the workmen that places one's entire reliance upon.
Description
Technical field
The present invention relates to building material field, particularly to a kind of injecting paste material, grouting method and road maintenance method for maintaining.
Background technology
China builds highway and follows the design concept of " strong basis sake " always, and this structure very easily forms drying shrinkage and warm plastic forming in basic unit, adds that road is that banded structure thing is easier to cause basic unit to produce transverse crack.Under car Vehicle Load, cause that serious " reflection crack " occurs in bitumen layer, cause pavement destruction.The method that reply reflection crack adopts at present mainly has overlay stress absorbing layer, and (cement injection) etc. is repaired in slip casting, but result is not ideal.
Slip casting refers to and utilizes air pressure, hydraulic pressure or electrochemical principle, inside serosity injecting structure.Serosity, in modes such as filling, permeate and be compacted, occupies the crack of inside configuration and position of coming to nothing, and by cracking originally, the structure come to nothing connects into an entirety, improves stability in the large and the intensity of structure.In current engineering, mortar depositing construction generally all refers to that cement injection is constructed, and conventional grouting method mainly has permeation grouting method, press injecting method, fracture grouting method, fills slip casting method etc..
China's grouting and reinforcing repairing technique adopts cement based grouting material mostly, and it has, and rupture strength is low, poor permeability, small gap are difficult to the shortcoming of construction, and can not quick open to traffic after construction, it is necessary to maintenance 2～3 days.Additionally slip casting supporting professional construction equipment and technique are immature, and the parameter such as its grouting pressure, injection speed, the slip casting degree of depth often empirically determines, and lack the effect assessment after assessment before the slip casting of science, the adjustment of slip casting process and slip casting.Generally speaking, the cement injection ubiquity construction and maintenance cycle is long, and uses the defects such as limited in asphalt concrete pavement is repaired.And, in work progress, Technical Reference and technology index empirically determine, and are theoretically unsound and data supporting.Therefore need badly for the problems referred to above, research permeability and the strong Colophonium injecting paste material of non-deformability, study supporting grouting construction process, to solve the technical problems such as injecting paste material performance grouting process not enough, supporting is not professional, thus realizing the upgrading without excavation road repair slurry injection technique.
Summary of the invention
The technical problem to be solved is in that the cement mortar grouting process overcoming prior art empirically determines entirely mainly for waterproofing and leakage-stopping engineering, the injecting paste material used and grouting process, be theoretically unsound the defect with data supporting, and provides a kind of injecting paste material, grouting method and road maintenance method for maintaining.Effect before slip casting, in slip casting process and after slip casting can be carried out effectively evaluating by road maintenance method for maintaining provided by the invention, overcome the defect of the micro-judgment of the workmen that places one's entire reliance upon, after maintenance, it is not necessary to maintenance, it is possible to open to traffic at once.
The invention provides a kind of injecting paste material, it adopts following raw material to prepare: described raw material includes hard grades of bitumen, Sha Suobide, SBS modifier and Colophonium master batch；The Con trolling index of described injecting paste material is: Asphalt Penetration is less than 10, and asphalt softening point is 85 DEG C～93.5 DEG C, and the dissolubility in trichloro ethylene is more than 99.3%.
In the present invention, described raw material is preferably comprised: the Sha Suobide of 2%～3%, the SBS modifier of 1%～3%, 15%～20% Colophonium master batch and 74%～82% hard grades of bitumen, described percentage ratio is mass percent.
In the present invention, described raw material be preferably the Sha Suobide of 2%～3%, the SBS modifier of 1%～2% and 15%～20% Colophonium master batch, all the other are hard grades of bitumen, and described percentage ratio is mass percent.
In the present invention, described hard grades of bitumen is the hard grades of bitumen that this area is conventional, it is preferably: Asphalt Penetration is 13～17, the asphalt softening point dissolubility more than 63 DEG C, in the trichloro ethylene hard grades of bitumen more than 99.8%, the 10# hard grades of bitumen more preferably produced for China PetroChemical Corporation.
In the present invention, described Sha Suobide is a kind of asphalt modifier, and its English name is sasobit, is generally produced by Sha Suo company.
In the present invention, described SBS modifier is the SBS modifier that this area is conventional, it is preferred that for type SBS modifying agent.Described type SBS modifying agent is preferably LG501 type SBS modifier or YH-791 type SBS modifier.Described LG501 type SBS modifier is generally produced by LG chemical company of Korea S.Described YH-791 type SBS modifier is generally produced by middle petrochemical industry Ba Ling petro-chemical corporation.
In the present invention, described Colophonium master batch is the Colophonium master batch that this area is conventional, it is preferred that be 1～2 for Asphalt Penetration, and asphalt softening point is more than 105 DEG C, the dissolubility in the trichloro ethylene Colophonium master batch more than 99.7%, the Colophonium master batch more preferably produced for China PetroChemical Corporation.Colophonium master batch refines what Colophonium obtained generally by compounds such as distillation technique, oxidation technology, solvent de-asphalting process and mixing process.
In the present invention, the preparation method of described injecting paste material is the method preparing modified pitch that this area is conventional, it is preferably comprised following steps: by hard grades of bitumen, Sha Suobide, SBS modifier and Colophonium master batch according to said ratio mix homogeneously, grind 30～50 minutes at 170～190 DEG C, it is stirred for 50～70 minutes,.
Wherein, the equipment of described grinding is that this area is conventional, it is preferred that for colloid mill.The condition of described grinding is that this area is conventional, it is preferred that for grinding 40 minutes at 180 DEG C.The time of described stirring is preferably 60 minutes.
In the present invention, the injecting paste material prepared according to above-mentioned raw materials and preparation method belongs to a kind of modified asphalt material.
In the present invention, described Asphalt Penetration has this area conventional sense, refer to the method according to " T0604-2011 asphalt penetration test ", at 25 DEG C, in the 5s time measured, load-carrying is the degree of depth that the standard prong of 100g vertically penetrates sample, owing to the unit of Asphalt Penetration is 0.1mm, then, the Asphalt Penetration in the present invention is to be multiplied by 10 numerical value obtained on the basis of this degree of depth.
In the present invention, described asphalt softening point has this area conventional sense, note in the copper ring of the size of regulation by sample, keep set point of temperature 5 DEG C after at least 15 minutes, directly over copper ring, put steel ball, start agitator, begin to warm up, make water temperature regulate in 3 minutes to rising per minute 5 DEG C ± 0.5 DEG C, record the temperature value of rising per minute；When sample is dropped gradually by thermal softening, to when contact with lower floor backplate surface, reading temperature value, it is designated as softening point value, its method of testing is referring specifically to " T0606-2011 bituminous softening-point test (ring and ball method) ".
In the present invention, the method measuring bitumen solubility that the dissolubility in trichloro ethylene adopts this area conventional measures, and records generally according to " test of T0607-1993 bitumen solubility ".
Present invention also offers a kind of grouting method；It comprises the steps: to heat to 180 DEG C～230 DEG C above-mentioned injecting paste material, is delivered to slurry injection nozzle place, carries out slip casting,；During described slip casting, the pressure of grouting pump is 0.3～0.5MPa.
In the present invention, the method for described heating is that this area is conventional, it is preferred that for combustion method.The temperature of described heating is preferably 220 DEG C～230 DEG C.Described heating preferably carries out in the asphalt tank with self heating function.Described heating preferably completes in previous hour in described slip casting.
In the present invention, the pressure at described slurry injection nozzle place is preferably 0.2～0.4MPa.
In the present invention, during described slip casting, the pressure of grouting pump is preferably 0.4MPa.
In the present invention, the equipment of described conveying is that this area is conventional, it is preferred that for bitumenpump.
Present invention also offers a kind of road maintenance method for maintaining, it comprises the steps: to open injected hole on road, adopts described injecting paste material to described injected hole slip casting；Slip casting terminates in latter 30 minutes, before the temperature of described injecting paste material is down to 40 DEG C, cement mortar is inserted described injected hole and strikes off,.
In the present invention, before opening injected hole, it is preferred that, also the crack place of the breaking concrete plate of road is carried out Beckman deflection test, then formulate maintenance program according to Beckman deflection: when Beckman deflection is less than 0.8mm, carry out slip casting；When Beckman deflection is be more than or equal to 0.8mm, it is preferred that, first at crack place again casting concrete, after described Beckman deflection is less than 0.8m, carry out slip casting again.
Wherein, when Beckman deflection is less than or equal to 0.3mm, if it is considered that Financial cost can not also carry out slip casting, but in order to reach better maintenance effect, it is preferred that be also by slip casting.
Wherein, described Beckman deflection is measured by backman beam method deflection testing.
In the present invention, the diameter of described injected hole is preferably 5cm.The density of offering of described injected hole is preferably every 2～4m2If one, be more preferably every 4m2If one.The arrangement mode of described injected hole is preferably Z-shaped arrangement.The distance at the position of opening of described injected hole and described crack place is preferably 0.8～1.0m.
In the present invention, after opening injected hole, it is preferred that also to cleaning around injected hole and sprinkling water.Described cleaning enters the rubbish of described injected hole for the removing that this area is conventional, removes the operation opening the residue that injected hole stays, it is preferred that for utilizing air compressor squeezing air to clean.The purpose of described watering is to make injected hole periphery moisten, it is prevented that injecting paste material is unrestrained to be attached on road surface to be difficult to clean off.
In the present invention, conventional according to this area, in addition it is also necessary to determine when end slip casting according to the outflow situation of injecting paste material, if other local outflow injecting paste material such as the seam at injected hole place, crack or neighbouring gutter, slip casting should be terminated.Meanwhile, if there is following several situations, in addition it is also necessary to stop slip casting in time: when 1. slip casting starts, the pressure of grouting pump is less than 0.4MPa, and when there is the phenomenon of slip casting difficulty, stops slip casting；2. the pressure at slurry injection nozzle place is at more than 0.4MPa, and when making to lift phenomenon in the concrete slab appearance near injected hole, stops slip casting；3. when the pressure at slurry injection nozzle place is lower than 0.2MPa, after slip casting process is performed continuously over 20～30 seconds, the region to injected hole if injecting paste material has trickled, slip casting should be stopped.If in the hole around injected hole flow out injecting paste material, but be not belonging to above-mentioned situation 1.～3., it is possible to cork, this hole is sealed, continue slip casting.
In the present invention, after described slip casting, it is preferred that, also the injecting paste material that around described injected hole and gap, crack, gutter etc. is overflowed is purged.
In the present invention, after striking off described in carrying out, again the crack place of breaking concrete plate is carried out Beckman deflection test, if Beckman deflection is more than 0.3mm, the all operations fracture place then repeating described road maintenance method for maintaining keeps in repair again, till Beckman deflection is less than or equal to 0.3mm.
In the present invention, described road refers to cement concrete road or asphalt concrete road.
Meeting on the basis of this area general knowledge, above-mentioned each optimum condition, can combination in any, obtain the preferred embodiments of the invention.
Agents useful for same of the present invention and raw material are all commercially.
The actively progressive effect of the present invention is in that:
(1) injecting paste material provided by the invention does not have granule foreign, will not block grouting equipment；And serosity fluidity is better, has osmosis of well flowing, it is possible to fill road narrows space, in reply reflection cracking in a pavement, there is good effect；The needle penetration of injecting paste material less than 10, hardness harder；And softening point is 85 DEG C～93.5 DEG C, softening point higher than the use temperature on road surface, can provide stable supporting role for road surface, thus improving the service life of road on the whole.
(2) setting rate of injecting paste material provided by the invention is fast, when being filled with original space of subgrade and pavement, can't periphery hydrological environment be impacted；And slip casting complete after substantially do not need maintenance (only needing about 30 minutes), it is possible at once open to traffic.
(3) effect before slip casting, in slip casting process and after slip casting can be carried out effectively evaluating by road maintenance method for maintaining provided by the invention, overcomes the defect of the micro-judgment of the workmen that places one's entire reliance upon.
Accompanying drawing explanation
The comparison diagram of crack occurrence rate when Fig. 1 is slip casting and not slip casting in embodiments of the invention 8.
Detailed description of the invention
Mode by the examples below further illustrates the present invention, but does not therefore limit the present invention among described scope of embodiments.The experimental technique of unreceipted actual conditions in the following example, conventionally and condition, or selects according to catalogue.
In following embodiment, the hard grades of bitumen that embodiment 1～3,5～7 adopts is the 10# hard grades of bitumen that China PetroChemical Corporation produces, and the Colophonium master batch of employing is the Colophonium master batch that China PetroChemical Corporation produces；In all embodiments, the Sha Suobide of employing is all purchased from Sha Suo company.The LG501 type SBS modifier adopted is purchased from LG chemical company of Korea S.The YH-791 type SBS modifier adopted is purchased from middle petrochemical industry Ba Ling petro-chemical corporation.In following embodiment, if no special instructions, described percentage ratio is mass percent.
Embodiment 1
Hard grades of bitumen, Sha Suobide, LG501 type SBS modifier and Colophonium master batch are weighed according to the mass ratio of 82:2:1:15, are placed in colloid mill, grind 40 minutes at 180 DEG C, be stirred for 60 minutes,.
The performance indications of the injecting paste material prepared according to the method described above are as follows: Asphalt Penetration is 5.6；Asphalt softening point is 85.2 DEG C；Dissolubility in trichloro ethylene is 99.6%.
Embodiment 2
In the present embodiment, the raw material of injecting paste material, preparation technology and step are all with embodiment 1, are different in that: LG501 type SBS modifier is replaced with YH-791 type SBS modifier, and the performance indications of prepared injecting paste material are as follows: Asphalt Penetration is 5.5；Asphalt softening point is 85.3 DEG C；Dissolubility in trichloro ethylene is 99.5%.
Embodiment 3
In the present embodiment, the raw material of injecting paste material, preparation technology and step are all with embodiment 1, are different in that: hard grades of bitumen: Sha Suobide: LG501 type SBS modifier: Colophonium master batch=77:2:1:20.The performance indications of prepared injecting paste material are as follows: Asphalt Penetration is 4.5；Asphalt softening point is 87.8 DEG C；Dissolubility in trichloro ethylene is 99.6%.
Embodiment 4
In the present embodiment, the raw material of injecting paste material, preparation technology and step are all with embodiment 3, it is different in that: the 10# hard grades of bitumen that China PetroChemical Corporation produces is replaced with the 10# hard grades of bitumen that China National Offshore Oil Corporation produces, Colophonium master batch also replaces with the Colophonium master batch that China National Offshore Oil Corporation produces, and the performance indications of prepared injecting paste material are as follows: Asphalt Penetration is 5.3；Asphalt softening point is 85.1 DEG C；Dissolubility in trichloro ethylene is 99.6%.
Embodiment 5
In the present embodiment, the raw material of injecting paste material, preparation technology and step are all with embodiment 1, are different in that: the mass ratio of hard grades of bitumen, Sha Suobide, LG501 type SBS modifier and Colophonium master batch is 81:2:2:15.The performance indications of the injecting paste material prepared according to the method described above are as follows: Asphalt Penetration is 5.3；Asphalt softening point is 88.3 DEG C；Dissolubility in trichloro ethylene is 99.5%.
Embodiment 6
In the present embodiment, the raw material of injecting paste material, preparation technology and step are all with embodiment 1, are different in that: the mass ratio of hard grades of bitumen, Sha Suobide, LG501 type SBS modifier and Colophonium master batch is 80:2:3:15.The performance indications of the injecting paste material prepared according to the method described above are as follows: Asphalt Penetration is 4.9；Softening point is 90.3 DEG C；Dissolubility in trichloro ethylene is 99.6%.
Embodiment 7
In the present embodiment, the raw material of injecting paste material, preparation technology and step are all with embodiment 1, are different in that: the mass ratio of hard grades of bitumen, Sha Suobide, LG501 type SBS modifier and Colophonium master batch is 74:3:3:20.The performance indications of the injecting paste material prepared according to the method described above are as follows: Asphalt Penetration is 3.6；Asphalt softening point is 93.3 DEG C；Dissolubility in trichloro ethylene is 99.5%.
Embodiment 8
The present embodiment is the case history of road maintenance maintenance, and construction area pavement structure is: 23cm cement concrete basic unit, Paving Bituminous Concrete surface layer in basic unit, overlaying structure is upper layer 5cmAM-13；Middle surface layer 5cm Coarse Graded Bituminous Concrete；Cutting optimal 5cm open gradation bituminous concrete.
Slip casting region is divided into two work areas: a work area and two work areas, and slip casting is implemented in the region that the present embodiment adopts described injecting paste material deflection in Beckman deflection test to be more than 0.3mm；After adopting injecting paste material slip casting, in Beckman deflection test, deflection is the region of more than 0.3mm, again slip casting；There is deflection in crack and Beckman deflection test to change cement concrete slab in the region of more than 0.81mm, then carry out slip casting.
On road during perforate, the diameter of injected hole is 5cm, and the density of offering of injected hole is every 4m2If 1, be 0.8～1.0m by the distance at Z-shaped cross arrangement, the position of opening of injected hole and crack place.The region that crack is concentrated adds injected hole separately.The injecting paste material that the injecting paste material used provides for embodiment 1, grouting method comprises the steps: to heat to 200 DEG C described injecting paste material, is delivered to slurry injection nozzle place, carries out slip casting,；During described slip casting, the pressure of grouting pump is 0.4MPa.The pressure at described slurry injection nozzle place is 0.3MPa.Slip casting terminates, in latter 30 minutes, before the temperature of described injecting paste material is down to 40 DEG C, cement mortar is inserted injected hole and strikes off,.
After slip casting, follow up survey mainly adopts the production in visual observation statistics crack.Have crack to produce although making discovery from observation after 1 year, but exist only in concrete slab structure seam or crack on reflection seam, mortar depositing construction is terminated latter 2 years internal fissure incidence rate situations and is calculated by equation below:
When slip casting and not slip casting, respectively through the concrete outcome of the crack occurrence rate of road after 1 year, 2 years as shown in Figure 1.The data of Fig. 1 show, even if when Beckman lateral bending sink the examination deflection that shows of instrument identical, Comparative result after using 1 year, two work area crack occurrence rate are dropped to 10% by 36%, and a work area crack occurrence rate is dropped to 4% by 34%.Contrasting after using 2 years, two work area crack occurrence rate are dropped to 22% by 50%, and a work area crack occurrence rate is dropped to 9% by 51%.Meanwhile, the numerical values recited of cracking ratio also can reflect the slip casting effect of injecting paste material provided by the invention, the numeric representation cracking ratio in Fig. 1 bracket, and its unit is cm/m2.It can be seen that a work area and two work areas adopt the slip casting region after injecting paste material maintenance, its cracking ratio is compared non-slip casting region and is substantially reduced.Visible, being used in combination of grouting method provided by the invention, slip casting Forecasting Methodology and road maintenance method for maintaining, it is possible to effectively prevent the generation of reflection crack, have broad application prospects.
Claims (13)
1. an injecting paste material, it is characterized in that, its adopt following raw material prepare: described raw material include 2%～3% Sha Suobide, the SBS modifier of 1%～3%, the Colophonium master batch of 15%～20% and 74%～82% hard grades of bitumen, described percentage ratio is mass percent；The Con trolling index of described injecting paste material is: needle penetration is less than 10, and softening point is 85 DEG C～93.5 DEG C, and the dissolubility in trichloro ethylene is more than 99.3%；Described Colophonium master batch is needle penetration is 1～2, softening point more than 105 DEG C, the Colophonium master batch more than 99.7% of the dissolubility in trichloro ethylene.
2. injecting paste material as claimed in claim 1, it is characterised in that described raw material includes: the Sha Suobide of 2%～3%, the SBS modifier of 1%～2% and 15%～20% Colophonium master batch, all the other are hard grades of bitumen, and described percentage ratio is mass percent.
3. injecting paste material as claimed in claim 1, it is characterised in that described hard grades of bitumen is Asphalt Penetration is 13～17, the asphalt softening point dissolubility more than 63 DEG C, in the trichloro ethylene hard grades of bitumen more than 99.8%；And/or, described SBS modifier is type SBS modifying agent.
4. injecting paste material as claimed in claim 3, it is characterised in that described hard grades of bitumen is the 10# hard grades of bitumen that China PetroChemical Corporation produces；And/or, described SBS modifier is LG501 type SBS modifier or YH-791 type SBS modifier.
5. the injecting paste material as described in any one of Claims 1 to 4; it is characterized in that; the preparation method of described injecting paste material comprises the steps: hard grades of bitumen, Sha Suobide, SBS modifier and Colophonium master batch mix homogeneously; grind 30～50 minutes at 170～190 DEG C; it is stirred for 50～70 minutes,.
6. injecting paste material as claimed in claim 5, it is characterised in that the equipment of described grinding is colloid mill.
7. injecting paste material as claimed in claim 5, it is characterised in that the condition of described grinding is grind 40 minutes at 180 DEG C.
8. injecting paste material as claimed in claim 5, it is characterised in that the time of described stirring is 60 minutes.
9. a grouting method, it is characterised in that it comprises the steps: to heat to 180 DEG C～230 DEG C the injecting paste material as described in any one of claim 1～8, is delivered to slurry injection nozzle place, carries out slip casting,；During described slip casting, the pressure of grouting pump is 0.3～0.5MPa.
10. grouting method as claimed in claim 9, it is characterised in that the method for described heating is combustion method；The temperature of described heating is 220 DEG C～230 DEG C；And/or, the pressure at described slurry injection nozzle place is 0.2～0.4MPa；And/or, during described slip casting, the pressure of grouting pump is 0.4MPa；And/or, the equipment of described conveying is bitumenpump.
11. a road maintenance method for maintaining, it is characterised in that it comprises the steps: to open injected hole on road, adopt injecting paste material as described in any one of claim 1～8 to as described in injected hole slip casting；Slip casting terminates in latter 30 minutes, before the temperature of described injecting paste material is down to 40 DEG C, cement mortar is inserted described injected hole and strikes off,.
12. road maintenance method for maintaining as claimed in claim 11, it is characterized in that, before opening injected hole, also the crack place of the breaking concrete plate of road is carried out Beckman deflection test, then maintenance program is formulated according to Beckman deflection: when Beckman deflection is less than 0.8mm, carry out slip casting；When Beckman deflection is be more than or equal to 0.8mm, first at crack place again casting concrete, when described Beckman deflection is less than 0.8mm, carry out slip casting again；
And/or, the diameter of described injected hole is 5cm；The density of offering of described injected hole is every 2～4m2If one；The arrangement mode of described injected hole is Z-shaped arrangement；And/or, the distance at the position of opening of described injected hole and described crack place is 0.8～1.0m.
13. road maintenance method for maintaining as claimed in claim 11, it is characterized in that, after striking off described in carrying out, the crack place of breaking concrete plate is carried out Beckman deflection test, if Beckman deflection is more than 0.3mm, the all operations fracture place then repeating described road maintenance method for maintaining keeps in repair again, till Beckman deflection is less than or equal to 0.3mm.
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| CN108587199A (en) * | 2018-04-26 | 2018-09-28 | 上海公路桥梁（集团）有限公司 | A kind of high fluidity slip casting modified pitch and preparation method thereof |
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