CN104062179A - Method for determining optimal burring process parameter of contact surface between rigid and soft layers of road - Google Patents
Method for determining optimal burring process parameter of contact surface between rigid and soft layers of road Download PDFInfo
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- CN104062179A CN104062179A CN201410241878.4A CN201410241878A CN104062179A CN 104062179 A CN104062179 A CN 104062179A CN 201410241878 A CN201410241878 A CN 201410241878A CN 104062179 A CN104062179 A CN 104062179A
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Abstract
The invention discloses a method for determining optimal burring process parameters of the contact surface between rigid and soft layers of roads. The method comprises the following steps: cutting grinded cement concrete plate test piece bottom plates by using cutters of equal distance and depth, so as to respectively prepare indoor burring cement concrete plates of which the depths are 3mm, 6mm and 10mm, the burring widths are 2mm, 5mm, 10mm and 13mm, and the burring distances are 8mm, 12mm and 16mm, coating the indoor burring cement concrete plates with equivalent adhesive oil, subsequently spreading asphalt surface plates, pressing the plates into double-layer track plates through a rutting tester, and performing anti-shearing property experiment and anti-pull property experiment on the double-layer track plates inside a room. A plurality of grooves are formed in the double-layer track plates obtained by using the method, so that the construction depth of adhesive layers is increased, furthermore, because of the grooves, the asphalt surface plates can be well embedded into cement concrete bottom plates, a gear effect is achieved, and thus the anti-shearing property and the anti-pull property of the contact surface are improved.
Description
Technical field
The present invention relates to a kind of method of cutting machine hacking cement concrete, relate in particular to the best brushing process parameter determination method of the hard and soft interlayer contact face of a kind of road.
Background technology
At present, the high-grade highway of China generally adopts semi-rigidity bituminous pavement structure, and this pavement structure is that significant contribution has been made in construction and the development of the high-grade highway of China's adaptation Heavy Traffic.But, semi-rigid asphalt pavement ubiquity early damage phenomenon, this domestic and international road expert has been carried out to a large amount of investigation to be shown, foundation base Contact is bad is one of key factor causing Pavement on Semi-rigid Type Base earlier period damage, and inter-laminar shear failure especially more easily occurs on deck installation structure.Interlayer shear causes can making Assessment of Serviceability of Roads degradation after interlayer slip, has seriously shortened the serviceable life of road.
In order to improve the adhesive property of hard and soft interlayer contact face, before making overlay or filler, need to be on semi-rigid type base the expensive sticky material of height such as first spreading emulsified asphalt, HMA, SBS modified bitumen, operation is loaded down with trivial details costly, price as current in shell SBS modified bitumen is 5800/ ton, with spread quantity 0.6kg/m
2calculate, every kilometer, Four-Lane Road road surface expense has just reached 78800 yuan.Even if used the combination effect of its interlayer of sticking layer oil not necessarily to significantly improve, under high-temperature condition, the too much priming oil of spread does not only have the effect of interlaminar bonding but also has played interlayer lubricating function, has accelerated the deterioration of interlayer contact state yet.Therefore, accelerating the research to the cohesiveness problem of the hard and soft surface of contact interlayer of highway, improve whole economy of repairing, is the objective demand that China's Highway Maintenance is built.
In order to meet the needs of communications and transportation development, improve Assessment of Serviceability of Roads, rigidity and semi-rigid type base are carried out to surface and dispose, when reducing the consumption of interlaminar bonding material, improve the hard and soft surface of contact anti-shear ability of highway, anti-pulling ability oneself through becoming current urgent problem.And the disposal of the hard and soft surface of contact of highway is also had except smearing sticking layer oil the technology such as plucking and hacking both at home and abroad, but these techniques are owing to lacking accurate control index parameter at present, and be difficult to apply widely.
Summary of the invention
The object of the invention is to overcome above-mentioned prior art shortcoming, provide the hard and soft interlayer contact face of a kind of road best brushing process parameter determination method.
For addressing the above problem, the technical scheme that the present invention takes is: comprise the following steps:
(1) prepare some groups of cement concrete slab test specimen base plates;
(2) get N cement concrete slab test specimen base plate, on each cement concrete slab test specimen base plate, offer some grooves, on each cement concrete slab test specimen base plate, the plucking degree of depth of groove is different, and the plucking groove width of each groove and the plucking spacing of adjacent trenches are identical, clean each cement concrete slab test specimen backplate surface mortar, obtain N and organize indoor stucco concrete slab;
(3) step (2) being obtained to N organizes the pitch panel that paves on indoor plucking concrete slab and is made into N and organizes double-deck rut plate;
(4) on each the double-deck rut plate obtaining in step (3), core boring sampling is as parallel test specimen;
(5) parallel test specimen step (4) being obtained carries out anti-pulling performance test and anti-shear performance test, records each double-deck rut plate concrete drawing stress value, shear stress values;
(6) contrast drawing stress value, the shear stress values of each double-deck rut plate under the different plucking degree of depth, obtain optimum plucking depth value;
(7) get M cement concrete slab test specimen base plate, on each cement concrete slab test specimen base plate, offer some grooves, on each cement concrete slab test specimen base plate, the plucking groove width of groove is different, the plucking spacing of adjacent trenches is identical with the plucking degree of depth, wherein the plucking degree of depth is step 6) the optimum plucking depth value that obtains, clean each cement concrete slab test specimen backplate surface mortar, obtain M and organize indoor stucco concrete slab, organize the indoor stucco concrete slab pitch panel that paves and be made into M and organize double-deck rut plate obtaining M; On each double-deck rut plate, core boring sampling is as parallel test specimen; The parallel test specimen obtaining is carried out to anti-pulling performance test and anti-shear performance test, record each double-deck rut plate concrete drawing stress value, shear stress values, contrast drawing stress value, the shear stress values of each double-deck rut plate under different plucking groove widths, obtain optimum plucking groove width value;
(8) get X cement concrete slab test specimen base plate, on each cement concrete slab test specimen base plate, offer some grooves, the plucking groove width of groove on each cement concrete slab test specimen base plate, the plucking degree of depth is all identical, the plucking spacing of adjacent trenches is different, wherein plucking groove width is step 7) the optimum plucking groove width value that obtains, the plucking degree of depth is step 6) the optimum plucking depth value that obtains, clean each cement concrete slab test specimen backplate surface mortar, obtain X and organize indoor plucking concrete slab, organize the pitch panel that paves on indoor stucco concrete slab and be made into X and organize double-deck rut plate obtaining X, on each double-deck rut plate, core boring sampling is as parallel test specimen, the parallel test specimen obtaining is carried out to anti-pulling performance test and anti-shear performance test, record each double-deck rut plate concrete drawing stress value, shear stress values, contrast drawing stress value, the shear stress values of each double-deck rut plate under different plucking spacing, obtain optimum plucking distance values.
Described cement concrete slab test specimen base plate adopts C30 cement, by 87.8kg/m
3cement, 44.4kg/m
3water, 151.1kg/m
3sand, 10 ?20mm particle diameter coarse aggregate 200kg/m
3, 5 ?10mm particle diameter fine aggregate 50kg/m
3match ratio be prepared from.
Described pitch panel is for adopting the matrix pitch of label 70, by oily 118.9kg/m
3, breeze 148.7kg/m
3, 0 ?the fine aggregate 594.4kg/m of 2.36mm particle diameter
3, 2.36 ?the coarse aggregate 569.6kg/m of 4.75mm particle diameter
3, 4.75 ?the coarse aggregate 693.49kg/m of 9.5mm particle diameter
3, 9.5 ?the coarse aggregate 470.58kg/m of 19mm particle diameter
3match ratio configuration after BH ? evenly mix and stir in the full-automatic compound mixer of 20 type and obtain for 1 minute.
Described coarse aggregate is rubble;
Described fine aggregate is natural sand or Machine-made Sand;
Described double-deck rut plate manufacturing process is according to 0.6kg/m on each indoor stucco concrete slab
2evenly smear emulsified asphalt sticking layer oil, after emulsified asphalt sticking layer oil fully infiltrates, pitch upper layer material is paved and places the double-deck rut die for molding of indoor stucco concrete slab, obtain double-deck rut plate.
Described moulding adopt HYCX ?1 type rut sample forming machine.
Use brill core machine to drill through the core that four diameters are 105mm on each double-deck rut plate.
Carrying out drawing property test and before testing shear performance, parallel test specimen be placed in to 25 ℃ ± 1 time insulation 2h in water-bath environmental cabinet.
The concrete steps of offering groove on cement concrete slab test specimen base plate are:
1) cement concrete slab test specimen base plate is placed on grinding depth Control experiment worktable, utilizes block to fix;
2) with chalk, on cement concrete slab test specimen base plate, draw accurately the position of each groove;
3) adjust cutting machine elevating screw, make gaining machine blade row embed the plucking degree of depth, plucking groove width and plucking spacing that cement concrete slab test specimen base plate reaches respectively setting;
4) open gaining machine motor switch, at the uniform velocity rotation cutting forward, gaining machine speed is 20mm/min.
Described anti-pulling performance test concrete steps are:
(1) by parallel test specimen two of 25 ± 1 ℃ with epoxy resin be separately fixed at LGZ ?on I type drawing instrument bottom panel and drawing head;
(2) after solidifying completely, drawing equipment is positioned over to parallel test specimen top, regulate three balance brackets to make whole draw-off gear become vertical relation with parallel test specimen;
(3) nut under the drawing arm of force is connected and is fixed with drawing head, open motor and automatically stop after breaking, directly read drawing stress value and drawing displacement size;
Described anti-shear performance experimental working technique is as follows:
(1) parallel test specimen is fixed on to the fixed mould of JHY ?A type boxshear apparatus, makes the seam of tack coat surface of contact and fixed mould in same plane;
(2) will load after arm of force reset, loading velocity 30Hz and numbering will be set, shear;
(3), after shearing finishes, directly read shear stress values and shear displacemant size.
Compared with prior art, the present invention has following beneficial effect: the present invention is by the applicable cases of shop experiment simulating actual conditions, at cement concrete slab test specimen base plate, offer groove, then pitch panel thereon paves, obtain double-deck rut plate, indoor, double-deck rut plate is carried out to anti-shear performance test and anti-pulling performance test, on the double-deck rut plate obtaining through this test method, form some grooves, when increasing tack coat construction depth, the appearance of groove can also make pitch panel better embed in cement concrete base plate, formative gear effect, with this, improve shear behavior and the anti-pulling performance of surface of contact, it is carried out to testing shear performance and drawing property test, determine the plucking degree of depth, plucking width and the isoparametric optimum value of plucking spacing, for the large scale application of rigidity and semi-rigid type base interlayer plucking provides test figure, rigidity or semi-rigid type base are set to best plucking parameter, both enhanced productivity, guarantee again construction quality, that the key link of promoting surface of contact plucking technology is of great significance the construction method tool of adhesive property between the hard and soft material layer in research raising road surface.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention;
Fig. 2 is the groove texture structure figure under the best plucking parameter of the present invention;
Fig. 3 is icking tool arrangement schematic diagram of the present invention;
Fig. 4 is sample dimensions of the present invention and plucking form schematic diagram;
Fig. 5 is shearing strength histogram under the different plucking parameters of the present invention;
Fig. 6 is tensile strength histogram under the different plucking parameters of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further details:
Comprehensive existing document and the construction experience plucking degree of depth are chosen as tetra-kinds of 0mm, 3mm, 6mm, 10mm, plucking spacing is chosen as tri-kinds of 8mm, 12mm, 16mm, considers under the prerequisite of blade width and conventional AC ?13 particle size that plucking groove width is chosen as tetra-kinds of 2mm, 5mm, 9mm and 13mm; Get N=4, M=4, X=3;
Referring to Fig. 1 to Fig. 6, the best brushing process parameter determination method of the hard and soft interlayer contact face of a kind of road of the present invention, comprises the following steps:
(1) adopt the cement that label is C30, by 87.8kg/m
3cement, 44.4kg/m
3water, 151.1kg/m
3sand, 10 ?20mm Stone 200kg/m
3, 5 ?the natural sand 50kg/m of 10mm particle diameter
3match ratio prepare the cement concrete slab test specimen base plate that 11 packet sizes are 30cm * 30cm * 5cm;
(2) get four groups of cement concrete slab test specimen base plates, on every group of cement concrete slab test specimen base plate, offer some grooves, on each cement concrete slab test specimen base plate, the plucking degree of depth of groove is respectively 0mm, 3mm, 6mm, 10mm, and the plucking groove width of each groove and the plucking spacing of adjacent trenches are identical, be respectively 2mm and 8mm, clean each cement concrete slab test specimen backplate surface mortar, obtain four groups of indoor stucco concrete slabs;
(3) in step (2), obtain paving on four groups of indoor stucco concrete slabs that to be made into four packet sizes be the double-deck rut plate of 30cm * 30cm * 10cm to pitch panel;
(4) use to bore and on each double-deck rut plate that core machine obtains in step (3), to drill through core that four diameters are 105mm as parallel test specimen;
(5) parallel test specimen is placed in to 25 ℃ ± 1 time insulation 2h in water-bath environmental cabinet, then it is carried out to anti-pulling performance test and anti-shear performance test, record each double-deck rut plate concrete drawing stress value, shear stress values;
(6) contrast drawing stress value, the shear stress values of each double-deck rut plate under the different plucking degree of depth, obtaining optimum plucking depth value is 10mm;
(7) get four groups of cement concrete slab test specimen base plates, on each cement concrete slab test specimen base plate, offer some grooves, on each cement concrete slab test specimen base plate, the plucking groove width of groove is respectively 2mm, 5mm, 9mm and 13mm, plucking spacing and the plucking degree of depth of adjacent trenches are identical, be respectively 8mm and 10mm, clean each cement concrete slab test specimen backplate surface mortar, obtain four groups of indoor stucco concrete slabs, be made into four groups of double-deck rut plates obtaining four groups of indoor stucco concrete slabs pitch panel that paves; On each double-deck rut plate, core boring sampling is as parallel test specimen; Parallel test specimen is placed in to 25 ℃ ± 1 time insulation 2h in water-bath environmental cabinet, then it is carried out to anti-pulling performance test and anti-shear performance test, record each double-deck rut plate concrete drawing stress value, shear stress values, contrast drawing stress value, the shear stress values of each double-deck rut plate under different groove widths, obtaining optimum plucking groove width value is 13mm;
(8) get three groups of cement concrete slab test specimen base plates, on each cement concrete slab test specimen base plate, offer some grooves, on each cement concrete slab test specimen base plate, plucking groove width, the plucking degree of depth of groove are all identical, be respectively 13mm and 10mm, the plucking spacing of adjacent trenches is respectively 8mm, 12mm, 16mm, clean each cement concrete slab test specimen backplate surface mortar, obtain three groups of indoor stucco concrete slabs, the pitch panel that paves on three groups that obtain indoor stucco concrete slabs is made into three groups of double-deck rut plates; On each double-deck rut plate, core boring sampling is as parallel test specimen; Parallel test specimen is placed in to 25 ℃ ± 1 time insulation 2h in water-bath environmental cabinet, then it is carried out to anti-pulling performance test and anti-shear performance test, record each double-deck rut plate concrete drawing stress value, shear stress values, contrast drawing stress value, the shear stress values of each double-deck rut plate under different plucking spacing, obtain optimum plucking distance values 8mm.
Wherein, double-deck rut plate manufacturing process is by 0.6kg/m by emulsified asphalt sticking layer oil
2evenly be applied on each indoor stucco concrete slab, after emulsified asphalt sticking layer oil fully infiltrates, pitch panel is paved and placed in the double-deck rut mould of indoor stucco concrete slab, adopt HYCX-1 type rut sample forming machine to roll to be back and forth placed on for 24 times that hothouse is placed two days later, form removal obtains double-deck rut plate outward, pitch panel adopts the matrix pitch of label 70, according to oily 118.9kg/m
3, breeze 148.7kg/m
3, the natural sand 594.4kg/m of 0-2.36mm particle diameter
3, the rubble 569.6kg/m of 2.36-4.75mm particle diameter
3, the rubble 693.49kg/m of 4.75-9.5mm particle diameter
3, the rubble 470.58kg/m of 9.5-19mm particle diameter
3match ratio configuration after in the full-automatic compound mixer of BH-20 type, evenly mix and stir the matrix pitch that obtains or adopt label 70 for 1 minute, according to oily 118.9kg/m
3, breeze 148.7kg/m
3, the Machine-made Sand 594.4kg/m of 0-2.36mm particle diameter
3, the rubble 569.6kg/m of 2.36-4.75mm particle diameter
3, the rubble 693.49kg/m of 4.75-9.5mm particle diameter
3, the rubble 470.58kg/m of 9.5-19mm particle diameter
3match ratio configuration after in the full-automatic compound mixer of BH-20 type, evenly mix and stir and obtain for 1 minute.
The concrete steps of offering groove on cement concrete slab test specimen base plate are:
1) cement concrete slab test specimen base plate is placed on grinding depth Control experiment worktable, utilizes block to fix;
2) with chalk, on cement concrete slab test specimen base plate, draw accurately the position of each groove;
3) adjust cutting machine elevating screw, make gaining machine blade row embed cement concrete slab test specimen base plate and reach respectively the set plucking degree of depth, plucking groove width and plucking spacing;
4) open gaining machine motor switch, be at the uniform velocity rotated in cutting forward, keeping gaining machine speed is 20mm/min.
Anti-shear performance test
The present invention adopts staight scissors to evaluate the anti-shear performance of test specimen, the main thought of direct shear test is the state of being cut of simulated roadway tack coat, its test principle and road surface actual loading situation have certain difference strictly speaking, but what obtain due to its result is the average shearing strength of tack coat, and approach the actual state of being cut of tack coat with this, and test method is fairly simple, easily control, therefore with it, evaluate the cutting performance of tack coat.
JHY ?A type boxshear apparatus is selected in anti-shear performance test, and this instrument mainly consists of fixed mould, the loading arm of force, motor and micro processor.
Anti-shear performance experimental working technique is as follows:
(1) parallel test specimen is fixed on the fixed mould of JHY ?A type boxshear apparatus left end as shown in Figure 1, guarantee tack coat surface of contact in the seam of mould in same plane;
(2) will load after arm of force reset, it is 30Hz and numbering that loading velocity is set, and can start to shear;
(3), after shearing finishes, directly read shear stress values and shear displacemant size.
Anti-pulling performance test
Adhesive surface will keep good continuous state, except possessing in the horizontal direction enough shearing strengths, also will in vertical direction, can provide good cohesive strength.Interlayer pull-out test can reflect the test of pavement structure interlayer cohesive strength just, its objective is in order to check the cementation power of adhesion coating and upper and lower two interlayers, and can observe the breakoff phenomenon of cohesive force when not enough.
Anti-pulling performance test of the present invention is selected LGZ ?I type drawing instrument, and this instrument mainly consists of fixed mould, the loading arm of force, balance bracket, motor and micro processor.
Anti-pulling experimental working technique is as follows:
(1) by parallel test specimen two of 25 ± 1 ℃ with epoxy resin be separately fixed at LGZ ?on I type drawing instrument bottom panel and drawing head;
(2) after solidifying completely (under room temperature 1 ?2 days), is positioned over test specimen top by drawing equipment, and regulating three balance brackets is that whole draw-off gear becomes vertical relation with test specimen;
(3) nut under the drawing arm of force is connected and is fixed with drawing head, open motor and automatically stop after breaking, directly read drawing stress value and drawing displacement size.
The test specimen chosen under different plucking parameters of test carries out across comparison test, result as table 1 ?as shown in 7:
The different plucking direction of table 1 down cut stress value
When the plucking degree of depth, plucking groove width and plucking spacing all immobilize, to respectively recording four groups of shear stress values under different plucking directions, as shown in the test figure of table 1, known when plucking direction is during perpendicular to direction of traffic, its shear stress values is larger, so follow-up test all adopts this plucking direction.
The different plucking parameter of table 2 down cut stress value
Drawing stress value under the different plucking degree of depth of table 3
When the plucking degree of depth is respectively 0mm, 3mm, 6mm, 10mm, when plucking groove width and plucking spacing are 2mm and 8mm, record respectively four groups of shear stress values and drawing stress value, result is as shown in table 2, table 3, known in plucking width and plucking spacing constant in the situation that through contrasting, when the plucking degree of depth is 6mm, its test specimen interlayer shear stress intensity is much larger than the interlayer shear stress intensity of other degree of depth, and test specimen interlayer drawing stress intensity
Basically identical when 6mm and 10mm, therefore the best plucking degree of depth is 6mm.
The different plucking width of table 4 down cut stress value
Drawing stress value under the different plucking width of table 5
When plucking width is respectively 2mm, 5mm, 9mm and 13mm, the plucking degree of depth is 6mm, when plucking spacing is 8mm, it is done respectively to four groups of shear stress tests and drawing stress test, comparative test result is as table 4, the demonstration of table 5 data, known by these data, when plucking separation and the plucking degree of depth immobilize, when plucking width is 13mm, its test specimen interlayer cuts performance and drawing property is all the highest, so 13mm is best plucking width.
The different plucking spacing of table 6 down cut stress value
Drawing stress value under the different plucking spacing of table 7
When plucking spacing is respectively 8mm, 12mm and 16mm, the plucking degree of depth is 6mm, when plucking width is 13mm, it is respectively done to four groups of shear stress tests and drawing stress test, result is as shown in table 6 and table 7, known by this test result, when plucking spacing is 8mm, test specimen interlaminar shear strength and pull strength are the highest, so 8mm is best plucking spacing value.
Referring to Fig. 5 and Fig. 6, by it, can be drawn, in the plucking degree of depth, be 0 o'clock, the double-deck rut plate shear stress values of cement concrete base plate and pitch panel and drawing stress value are minimum.When the plucking degree of depth is different, plucking groove width is when identical with plucking separation, the shear stress values when plucking degree of depth is 6mm and drawing stress value are relatively large; When plucking groove width difference, the plucking degree of depth is that 6mm, plucking separation are fixedly time, shear stress values and the drawing stress value of plucking groove width when 13mm is relatively large, when plucking separation difference, the plucking degree of depth and plucking groove width are fixedly time, and shear stress values when plucking separation is 8mm and drawing stress value are relatively large.
Known by above-mentioned conclusion (of pressure testing), filler be conventional AC ?13 o'clock, the plucking degree of depth is 6mm, width is 13mm, spacing is that 8mm is optimum plucking parameter, and plucking direction when being subject to force direction vertical shear stress values when drawing stress value is better than plucking direction and is subject to force direction parallel.
The present invention is by the applicable cases of shop experiment simulating actual conditions, by shop experiment, can obtain the cement concrete base plate of longitudinal groove texture and the double-deck rut plate of pitch panel, indoor, it is carried out to anti-shear performance test and anti-pulling performance test, determine the plucking degree of depth, plucking width and the isoparametric optimum value of plucking spacing, for the large scale application of rigidity and semi-rigid type base interlayer plucking provides test figure.
How rigidity or semi-rigid type base being set to best plucking parameter, both enhanced productivity, guarantee again construction quality, is the key link of promoting surface of contact plucking technology.The construction method tool that research is improved to adhesive property between the hard and soft material layer in road surface is of great significance.
Claims (10)
1. the best brushing process parameter determination method of the hard and soft interlayer contact face of road, is characterized in that, comprises the following steps:
(1) prepare some groups of cement concrete slab test specimen base plates;
(2) get N cement concrete slab test specimen base plate, on each cement concrete slab test specimen base plate, offer some grooves, on each cement concrete slab test specimen base plate, the plucking degree of depth of groove is different, and the plucking groove width of each groove and the plucking spacing of adjacent trenches are identical, clean each cement concrete slab test specimen backplate surface mortar, obtain N and organize indoor stucco concrete slab;
(3) step (2) being obtained to N organizes the pitch panel that paves on indoor plucking concrete slab and is made into N and organizes double-deck rut plate;
(4) on each the double-deck rut plate obtaining in step (3), core boring sampling is as parallel test specimen;
(5) parallel test specimen step (4) being obtained carries out anti-pulling performance test and anti-shear performance test, records each double-deck rut plate concrete drawing stress value, shear stress values;
(6) contrast drawing stress value, the shear stress values of each double-deck rut plate under the different plucking degree of depth, obtain optimum plucking depth value;
(7) get M cement concrete slab test specimen base plate, on each cement concrete slab test specimen base plate, offer some grooves, on each cement concrete slab test specimen base plate, the plucking groove width of groove is different, the plucking spacing of adjacent trenches is identical with the plucking degree of depth, wherein the plucking degree of depth is step 6) the optimum plucking depth value that obtains, clean each cement concrete slab test specimen backplate surface mortar, obtain M and organize indoor stucco concrete slab, organize the indoor stucco concrete slab pitch panel that paves and be made into M and organize double-deck rut plate obtaining M; On each double-deck rut plate, core boring sampling is as parallel test specimen; The parallel test specimen obtaining is carried out to anti-pulling performance test and anti-shear performance test, record each double-deck rut plate concrete drawing stress value, shear stress values, contrast drawing stress value, the shear stress values of each double-deck rut plate under different plucking groove widths, obtain optimum plucking groove width value;
(8) get X cement concrete slab test specimen base plate, on each cement concrete slab test specimen base plate, offer some grooves, the plucking groove width of groove on each cement concrete slab test specimen base plate, the plucking degree of depth is all identical, the plucking spacing of adjacent trenches is different, wherein plucking groove width is step 7) the optimum plucking groove width value that obtains, the plucking degree of depth is step 6) the optimum plucking depth value that obtains, clean each cement concrete slab test specimen backplate surface mortar, obtain X and organize indoor plucking concrete slab, organize the pitch panel that paves on indoor stucco concrete slab and be made into X and organize double-deck rut plate obtaining X, on each double-deck rut plate, core boring sampling is as parallel test specimen, the parallel test specimen obtaining is carried out to anti-pulling performance test and anti-shear performance test, record each double-deck rut plate concrete drawing stress value, shear stress values, contrast drawing stress value, the shear stress values of each double-deck rut plate under different plucking spacing, obtain optimum plucking distance values.
2. the best brushing process parameter determination method of the hard and soft interlayer contact face of a kind of road according to claim 1, is characterized in that, described cement concrete slab test specimen base plate adopts C30 cement, by 87.8kg/m
3cement, 44.4kg/m
3water, 151.1kg/m
3sand, 10-20mm particle diameter coarse aggregate 200kg/m
3, 5-10mm particle diameter fine aggregate 50kg/m
3match ratio be prepared from.
3. the best brushing process parameter determination method of the hard and soft interlayer contact face of a kind of road according to claim 1, is characterized in that, described pitch panel is for adopting the matrix pitch of label 70, by oily 118.9kg/m
3, breeze 148.7kg/m
3, the fine aggregate 594.4kg/m of 0-2.36mm particle diameter
3, the coarse aggregate 569.6kg/m of 2.36-4.75mm particle diameter
3, the coarse aggregate 693.49kg/m of 4.75-9.5mm particle diameter
3, the coarse aggregate 470.58kg/m of 9.5-19mm particle diameter
3match ratio configuration after in the full-automatic compound mixer of BH-20 type, evenly mix and stir and obtain for 1 minute.
4. according to the best brushing process parameter determination method of the hard and soft interlayer contact face of a kind of road described in claim 2 or 3, it is characterized in that, described coarse aggregate is rubble;
Described fine aggregate is natural sand or Machine-made Sand.
5. the best brushing process parameter determination method of the hard and soft interlayer contact face of a kind of road according to claim 1, is characterized in that, described double-deck rut plate manufacturing process is according to 0.6kg/m on each indoor stucco concrete slab
2evenly smear emulsified asphalt sticking layer oil, after emulsified asphalt sticking layer oil fully infiltrates, pitch upper layer material is paved and places the double-deck rut die for molding of indoor stucco concrete slab, obtain double-deck rut plate.
6. the best brushing process parameter determination method of the hard and soft interlayer contact face of a kind of road according to claim 5, is characterized in that, described moulding adopt HYCX ?1 type rut sample forming machine.
7. the best brushing process parameter determination method of the hard and soft interlayer contact face of a kind of road according to claim 1, is characterized in that, uses brill core machine to drill through the core that four diameters are 105mm on each double-deck rut plate.
8. the best brushing process parameter determination method of the hard and soft interlayer contact face of a kind of road according to claim 1, is characterized in that, is carrying out drawing property test and before testing shear performance, parallel test specimen is being placed in to 25 ℃ ± 1 time insulation 2h in water-bath environmental cabinet.
9. the best brushing process parameter determination method of the hard and soft interlayer contact face of a kind of road according to claim 1, is characterized in that, the concrete steps of offering groove on cement concrete slab test specimen base plate are:
1) cement concrete slab test specimen base plate is placed on grinding depth Control experiment worktable, utilizes block to fix;
2) with chalk, on cement concrete slab test specimen base plate, draw accurately the position of each groove;
3) adjust cutting machine elevating screw, make gaining machine blade row embed the plucking degree of depth, plucking groove width and plucking spacing that cement concrete slab test specimen base plate reaches respectively setting;
4) open gaining machine motor switch, at the uniform velocity rotation cutting forward, gaining machine speed is 20mm/min.
10. the best brushing process parameter determination method of the hard and soft interlayer contact face of a kind of road according to claim 1, is characterized in that, described anti-pulling performance test concrete steps are:
(1) by parallel test specimen two of 25 ± 1 ℃ with epoxy resin be separately fixed at LGZ ?on I type drawing instrument bottom panel and drawing head;
(2) after solidifying completely, drawing equipment is positioned over to parallel test specimen top, regulate three balance brackets to make whole draw-off gear become vertical relation with parallel test specimen;
(3) nut under the drawing arm of force is connected and is fixed with drawing head, open motor and automatically stop after breaking, directly read drawing stress value and drawing displacement size;
Described anti-shear performance experimental working technique is as follows:
(1) parallel test specimen is fixed on to the fixed mould of JHY ?A type boxshear apparatus, makes the seam of tack coat surface of contact and fixed mould in same plane;
(2) will load after arm of force reset, loading velocity 30Hz and numbering will be set, shear;
(3), after shearing finishes, directly read shear stress values and shear displacemant size.
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| CN106442060A (en) * | 2016-10-20 | 2017-02-22 | 长安大学 | Forming test mold for asphalt mixture rutting test piece |
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