CN102252915A - Method for performing low temperature performance test on joint strip by using pull test machine - Google Patents
Method for performing low temperature performance test on joint strip by using pull test machine Download PDFInfo
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- CN102252915A CN102252915A CN2011101543444A CN201110154344A CN102252915A CN 102252915 A CN102252915 A CN 102252915A CN 2011101543444 A CN2011101543444 A CN 2011101543444A CN 201110154344 A CN201110154344 A CN 201110154344A CN 102252915 A CN102252915 A CN 102252915A
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Abstract
The invention discloses a method for performing low temperature performance test on a joint strip by using a pull test machine. The pull test machine comprises a pull test machine, a low temperature device and a processor. The method comprises the following steps of: preparing a test piece of the joint strip; installing and pulling, namely placing the test piece in the low temperature device and preserving heat for preset time, and then installing on the pull test machine; and testing parameters, namely pulling the test piece of the joint strip opposite to each other bidirectionally by a pull rod structure of the pull test machine and automatically acquiring and displaying a stress-strain curve by using the processor in the testing process. The method realizes the test of the key technical index, namely low temperature performance of the joint strip, and provides guarantee for the mass production, wide application and performance improvement of the joint strip.
Description
Technical field
The invention belongs to the road engineering field.More specifically, the present invention relates to a kind of method of utilizing cupping machine pressing belt to be carried out the cryogenic property test.
Background technology
The crack is one of main disease of bituminous pavement, adopts various technological means sealing pavement cracks, and anti-sealing infiltrates pavement structure inside, is extensively thought to slow down the effective means that pavement disease occurs, prolongs service life of road surface in the world.Usually adopting the joint filling or the cementation of fissures to carry out the crack repairs.Filling technology does not expand groove to the crack, directly adopts joint sealing material to fill in the crack, and result of use is relatively poor usually.Slit-pouring Technology is at first slotted and is expanded seam, adopts fluid sealant perfusion crack then, and result of use is better relatively.But also there is certain limitation in Slit-pouring Technology, at first is that the work efficiency of the fluting cementation of fissures is very low, is difficult to satisfy the requirement of repairing road surface at quick speed; Next is to slot to bring easily afterwards to gnaw limit, the sick evil of latasuture grade, and the highway section aging more serious on the road surface is all the more so.
Pressing belt (also claiming affixing kerfs belt, joint filling band) is a kind of novel crack patching material, usually can be divided into two types of self-adhering type and hot sticky formulas, primary raw material is made of rubber asphalt and fibrous material, can also comprise high-strength binding material, antiaging agent, antistripping agent etc. in addition.The principle of work of pressing belt is by external force extruding strip material closed fracture, is similar to pavement crack " adhesive bandage ".The technology that adopts pressing belt to carry out the pavement crack repairing is called the tooled joint technology, this technology does not need the road pavement crack to slot, only need simply clean fracture faces and get final product, and have very high work efficiency, and can not produce the secondary disease that fluting causes.Therefore, the tooled joint technology has remedied the deficiency of Slit-pouring Technology preferably, becomes a kind of novel crack fast repairing material of rising in recent years.
Because cryogenic property is the most critical technical indicator of pressing belt, therefore can be accurately that pressing belt is carried out the demand that cryogenic property tests is more and more urgent, the present invention just is based on the deficiency of existing cryogenic property measuring technology, propose a kind of method that can carry out the test of accurate cryogenic property to novel crack fast repairing materials such as pressing belts, thereby give security for a large amount of productions of pressing belt and widely-used and improvement in performance.
Summary of the invention
Deficiency when novel crack fast repairing materials such as pressing belt being carried out the cryogenic property test in order to overcome in the prior art, the present invention aims to provide a kind of method of utilizing cupping machine pressing belt to be carried out the cryogenic property test, wherein said cupping machine comprises stretching testing machine, Cryo Equipment and processor, described Cryo Equipment is connected with stretching testing machine, and stretching testing machine is connected with processor; It is characterized in that this method may further comprise the steps:
A kind of method of utilizing cupping machine pressing belt to be carried out the cryogenic property test, wherein said cupping machine comprises stretching testing machine, Cryo Equipment and processor, described Cryo Equipment is connected with stretching testing machine, stretching testing machine is connected with processor, it is characterized in that this method may further comprise the steps:
Pressing belt test block preparation process, wherein the bituminous concrete to the moulding of wheel tracking test rules cuts according to the size of cryogenic tensile testing mould, obtain two bituminous concrete test blocks, described two bituminous concrete test blocks are embedded respectively in two cryogenic tensile testing moulds, and utilize adhering with epoxy resin to fix, bituminous concrete test block height is higher than cryogenic tensile testing mould side wall, then that described two cryogenic tensile testing moulds are parallel and put and have therebetween at interval, pressing belt pastes described bituminous concrete test block in the mode that is symmetrical in described interval and is exposed on the upper surface of openend one side of described testing mould, form described pressing belt test block, wherein said testing mould has framed structure, it has the side wall and the bottom end at two ends, the top is an openend, described framed structure is used to place the bituminous concrete test block, has Tiebar structure in the outside of described framed structure one distolateral wall;
Stretching step is installed, wherein described pressing belt test block is positioned in the Cryo Equipment, be incubated according to preset time and predetermined probe temperature, insulating process is installed in it on described stretching testing machine after finishing, and, in test process, keep described presumptive test temperature by the two-way relative stretching pressing belt test block of described Tiebar structure employing predetermined speed;
Testing procedure wherein utilizes described processor to obtain automatically and shows stress-strain curve, and occurs significantly falling after rise when changing when curve, stops to stretch and writes down the maximum extensibility and the maximum tension stress of pressing belt.
Description of drawings
By reading the detailed description of doing with reference to the following drawings that non-limiting example is done, it is more obvious that other features, objects and advantages of the present invention will become:
Fig. 1 is a kind of according to an embodiment of the invention synoptic diagram that utilizes the pressing belt test block described in cupping machine carries out cryogenic property test to pressing belt the method.
Fig. 2 is a kind of according to an embodiment of the invention synoptic diagram that utilizes the pressing belt test block described in cupping machine carries out cryogenic property test to pressing belt the method.
Fig. 3 is a kind of according to an embodiment of the invention synoptic diagram that utilizes applied environment in cupping machine carries out cryogenic property test to pressing belt the method.
Fig. 4 is the load-displacement curve figure that fracture takes place pressing belt behind the low-temperature test according to an embodiment of the invention.
Fig. 5 is the load-displacement curve figure that fracture takes place pressing belt behind the low-temperature test according to an embodiment of the invention.
Same or analogous Reference numeral is represented same or analogous parts in the accompanying drawing.
Embodiment
1-5 is described in further detail the present invention below with reference to accompanying drawings.
Fig. 1 is a kind of according to an embodiment of the invention synoptic diagram that utilizes the pressing belt test block described in cupping machine carries out cryogenic property test to pressing belt the method.As shown in Figure 1, described pressing belt test block comprises testing mould 101 and 102, corresponding with it is bituminous concrete test block 103 and 104, bituminous concrete test block 103 and 104 with the moulding of wheel tracking test rules is cut according to the size of cryogenic tensile testing mould 101 and 102, obtain two bituminous concrete test blocks 103 and 104, then described two bituminous concrete test blocks are embedded in cryogenic tensile testing mould 101 and 102, and bituminous concrete test block 103 and 104 is adhesively fixed in cryogenic tensile testing mould 101 and 102 with epoxy resin, wherein bituminous concrete test block 103 is fixed in the testing mould 101, and bituminous concrete test block 104 is fixed in the testing mould 102.Described bituminous concrete test block 103 and 104 all adopts cube structure.Usually, bituminous concrete test block height is higher than cryogenic tensile testing mould side wall.Just described then cryogenic tensile testing mould 101 is parallel with 102 and put, and promptly described two bituminous concrete test blocks 103 are parallel with 104 and put, and has at interval between two bituminous concrete test blocks 103 and 104.In one aspect of the invention, be spaced apart 10mm-30mm between described two bituminous concrete test blocks.Preferred, be spaced apart 10-20mm between described two bituminous concrete test blocks.
Described testing mould 101 and 102 has framed structure, and described framed structure has the side wall 108 and the bottom end 109 at two ends, and the top is an openend, and described framed structure is used to place described bituminous concrete test block 103 and 104.In one aspect of the invention, the thickness of side wall is 5mm.Aspect another, the thickness of described side wall and bottom is identical of the present invention.The outside at described framed structure one distolateral wall has Tiebar structure 105.Tiebar structure is used for being connected with the tractor of stretching testing machine.Stretching testing machine adopts the two-way relative tractive pressing belt test block of predetermined speed by described Tiebar structure.Two cryogenic tensile testing moulds 101 and 102 Tiebar structure are respectively in relative side wall 108 outsides.Has certain intervals 107 between described two testing moulds 101 and 102.In one aspect of the invention, described interval 107 is 0-20mm, is preferably 0-10mm.Of the present invention aspect another, only keep the testing mould 101 of two parallel connections and the interval of 102 side wall thicknesses sum between two bituminous concrete test blocks 103 and 104, i.e. two testing moulds 101 and 102 next-door neighbours.In a preferred embodiment of the invention, the thickness of side wall is 5mm, and two testing moulds 101 and 102 next-door neighbours make the interval that has 10mm between two bituminous concrete test blocks 103 and 104.Pressing belt 106 pastes described two bituminous concrete test blocks 103 and 104 in the mode that is symmetrical in described interval 107 and is exposed on the surface of openend one side of testing mould 101 and 102, promptly on the upper surface as shown in Figure 1.The length of pressing belt also can make the length of the length of pressing belt more than or equal to the side wall 108 that is parallel to pressing belt certainly less than the length of the side wall 108 that is parallel to pressing belt.In one aspect of the invention, pressing belt to be measured is a square or rectangular, and the width of its draw direction is 100-120mm, preferably 120mm.
In synoptic diagram shown in Figure 1, the material of testing mould and bituminous concrete test block can have multiple choices, and its geometric configuration also can adopt various ways, and is fixing as long as the two can mate.In addition, Tiebar structure adopts circular Tiebar structure usually, also can adopt the structure of other shapes.Tiebar structure can adopt the mode that runs through the testing mould sidewall, needn't design the clamp structure or the mechanical fixed structure of more complicated like this.The design of the Tiebar structure among the present invention can make two testing mould generation relative displacements make in the tension test process lateral shift or perk phenomenon not to occur.For example, can pass through the mode of the vertical direction surface of contact of increase Tiebar structure and sidewall.
Fig. 2 is a kind of according to an embodiment of the invention synoptic diagram that utilizes the pressing belt test block described in cupping machine carries out cryogenic property test to pressing belt the method.In this embodiment, two bituminous concrete test blocks embed in two testing moulds, only keep the interval of blind end thickness sum of the testing mould of two parallel connections between two bituminous concrete test blocks, i.e. two testing moulds next-door neighbours.
It is provided by the invention that to utilize cupping machine that pressing belt is carried out the test result that the method for cryogenic property test obtains stable.With the testing mould and the distance of test block and the cryogenic property that dimensional parameters can be measured pressing belt especially exactly that adopt in the method provided by the invention, measurement result is stable especially, and error is very little, and repeatability is high.
Fig. 3 is a kind of according to an embodiment of the invention synoptic diagram that utilizes the applied environment of cupping machine carries out cryogenic property test to pressing belt method.As shown in Figure 3, the cupping machine that the cryogenic property test is adopted comprises stretching testing machine 201, Cryo Equipment 202 and processor 203, and wherein said Cryo Equipment 202 is connected with stretching testing machine 201, and stretching testing machine 201 is connected with processor 203.In the cryogenic property test process, the above-mentioned pressing belt test block for preparing is placed stretching testing machine 201.Stretching testing machine 201 has load sensor and tractor, and 105 pairs of two testing moulds of Tiebar structure by the pressing belt test block carry out two-way relative stretching.Described processor 203 is generally PC or server end, can obtain and show stress-strain curve according to the concrete extensograph parameter of stretching testing machine 201 feedback and data and corresponding stress etc., while is according to the variation of curve, determine when to stop to stretch, and the maximum extensibility and the maximum tension stress of pressing belt carried out record.Process of the test and measurement, demonstration, analysis etc. are finished by PC or server automatic or manual.
Can also carry out repeatedly repeated stretching cyclic test in the method for the present invention.When carrying out repeatedly repeated stretching cyclic test, can the average extensibility of pressing belt be calculated and add up with average tension and corresponding data, and the parameters such as fatigue behaviour of analysis pressing belt, but the analysis of above-mentioned parameter and calculate the drawing numbers can detect described pressing belt and the average behavior index (as average tension, average extensibility), but extremely important to life cycle and the serviceable life of analyzing pressing belt.
Cryo Equipment 202 is mainly used in the pressing belt test block is incubated, thereby satisfy the demand of test relevant parameter, usually pressing belt test block time of placing in Cryo Equipment 202 and being incubated is 4 hours or for more time, drops to predetermined temperature up to the temperature of pressing belt test block.
In the cryogenic tensile experiment, the pressing belt test block fracture after the stretched test.Fig. 4 and Fig. 5 show be according to an embodiment of the invention behind the low-temperature test pressing belt load-displacement curve figure of fracture takes place.Pressing belt ruptures owing to stretching, relevant parameter during fracture and stress-strain curve have good reference value to important parameters such as the ultimate elongation amount of analyzing pressing belt and extensibility, tensions, so this crack conditions must cause the concrete curve map that shows in the processor or the significant change of data when taking place.In general, tangible falling can appear in curve.Take place at pressing belt under the situation of fracture fully, the tension force vanishing curve promptly occurs and drops to zero phenomenon.In some cases, for example, the pressing belt generating unit is divided fracture, and for example certain layer of pressing belt ruptures, and at this moment zigzag fashion appears in curve, and promptly stress increases again after falling after rise suddenly, and fracture fully takes place at last again, and stress curve drops to zero situation.Relevant parameter in the time of can adopting first falling of appearance or last falling in this case as required.Relevant parameter when in general, adopting last falling.Processor is to the analysis and the statistics of above-mentioned data, and the cryogenic property test of the development of pressing belt technology and follow-up new pressing belt is possessed significance.
Provided one below and will be used for the concrete test process of cryogenic property test and result's example according to the pressing belt test block that abovementioned steps prepares:
After placing Cryo Equipment insulation to be no less than 4h the pressing belt test block for preparing, be installed on the cupping machine.With 0.05mm/min speed tensile sample, process of the test keeps the test temperature of regulation.
Process of the test is obtained automatically by processor and is shown stress-strain curve, when curve occurs significantly falling after rise when changing, stops to stretch and writes down the maximum extensibility and the maximum tension stress of pressing belt.
The concrete parameter and the result of fracture took place in pressing belt when following table 1 was the cryogenic tensile test.Fig. 4 and Fig. 5 are the load-displacement curve figure of the pressing belt after the cryogenic tensile test according to an embodiment of the invention, and shown in it is exactly that post-rift load-displacement curve takes place pressing belt, and the probe temperature shown in Fig. 4 and Fig. 5 is respectively-30 ℃ and-20 ℃.As can be seen from Figure 4 and Figure 5, when temperature is-30 ℃, be when 13.766mm and pulling force are 1.912KN in displacement, (promptly descending) takes place obviously to fall after rise in curve; When temperature is-20 ℃, be when 14.580mm and pulling force are 1.904KN in displacement, (promptly descending) takes place obviously to fall after rise in curve.
Table 1 cryogenic tensile test findings
| Test temperature | Maximum displacement | The maximum, force value |
| -30℃ | 13.766mm | 1.912KN |
| -20℃ | 14.580mm | 1.904KN |
Treat pressure measurement seam band and carry out random sampling, cutting a plurality of samples of the same area carry out revision test, and test result is stable, and deviation is in ± 2%.
Certainly, above-mentioned table 1 only shows a kind of when probe temperature during for-30 ℃ and-20 ℃, the displacement under the situation that pressing belt to be tested takes place to rupture and the concrete numerical value of value of thrust, be understandable that, can set temperature, thus the maximum displacement and the maximum pull value of testing pressing belt under the different temperatures.Simultaneously, also can set the standard maximum displacement and the maximum pull value of the pressing belt of this kind material according to the test result that repeatedly ruptures, thereby when pressing belt (is for example finished the regulation amount of tension, maximum displacement value and value of thrust are near the mark) time, carry out the repeatedly stretching loop test of described pressing belt, thus but the fatigue behaviour and the drawing numbers of test pressing belt.
Perhaps, finish regulation amount of tension (as the maximum displacement value that records in the incipient stage 50%, 75% or be slightly less than 100% etc.) after, reply at room temperature after the taking-up, the fatigue behaviour of pressing belt is investigated in the cyclic test that repeats again repeatedly to stretch.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and under the situation that does not deviate from spirit of the present invention or essential characteristic, can realize the present invention with other concrete form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present invention is limited by claims rather than above-mentioned explanation, therefore is intended to be included in the present invention dropping on the implication that is equal to important document of claim and all changes in the scope.Any Reference numeral in the claim should be considered as limit related claim.In addition, obviously miscellaneous part, unit or step do not got rid of in " comprising " speech, and odd number is not got rid of plural number.A plurality of parts of stating in system's claim, unit or device also can be realized by software or hardware by parts, unit or device.
Claims (9)
1. one kind is utilized cupping machine that pressing belt is carried out the method that cryogenic property is tested, wherein said cupping machine comprises stretching testing machine, Cryo Equipment and processor, described Cryo Equipment is connected with stretching testing machine, stretching testing machine is connected with processor, it is characterized in that this method may further comprise the steps:
Pressing belt test block preparation process, wherein the bituminous concrete to the moulding of wheel tracking test rules cuts according to the size of cryogenic tensile testing mould, obtain two bituminous concrete test blocks, described two bituminous concrete test blocks are embedded respectively in two cryogenic tensile testing moulds, and utilize adhering with epoxy resin to fix, bituminous concrete test block height is higher than cryogenic tensile testing mould side wall, then that described two cryogenic tensile testing moulds are parallel and put, have therebetween at interval, pressing belt to be measured pastes described bituminous concrete test block in the mode that is symmetrical in described interval and is exposed on the upper surface of openend one side of described testing mould, form described pressing belt test block, wherein said testing mould has framed structure, it has the side wall and the bottom end at two ends, the top is an openend, has Tiebar structure in the outside of described framed structure one distolateral wall;
Stretching step is installed, wherein described pressing belt test block is positioned in the Cryo Equipment, be incubated according to preset time and predetermined probe temperature, insulating process is installed in it on described stretching testing machine after finishing, and, in test process, keep described presumptive test temperature by the two-way relative stretching pressing belt test block of described Tiebar structure employing predetermined speed;
Testing procedure wherein utilizes described processor to obtain automatically and shows stress-strain curve, and occurs significantly falling after rise when changing when curve, stops to stretch and writes down the maximum extensibility and the maximum tension stress of pressing belt.
2. the method for utilizing cupping machine that pressing belt is carried out cryogenic property test as claimed in claim 1 is spaced apart 10mm-30mm between wherein said two bituminous concrete test blocks, is preferably 10-20mm.
3. the method for utilizing cupping machine that pressing belt is carried out cryogenic property test as claimed in claim 2 is spaced apart 0-20mm between wherein said two testing moulds, is preferably 0-10mm.
4. as each described method of utilizing cupping machine that pressing belt is carried out the cryogenic property test among the claim 1-3, the thickness of the side wall of wherein said testing mould is 5mm.
5. as each described method of utilizing cupping machine that pressing belt is carried out the cryogenic property test among the claim 1-3, wherein said pressing belt to be measured is a square or rectangular, and the width of its draw direction is 100-120mm.
6. as each described cupping machine that utilizes among the claim 1-3 pressing belt is carried out the method that cryogenic property is tested, wherein also comprise the pressing belt test block is repeatedly stretched loop test to obtain the step of average extensibility, average tension and pressing belt fatigue behaviour index.
7. as each described method of utilizing cupping machine that pressing belt is carried out the cryogenic property test among the claim 1-3, wherein said preset time is 4 hours or longer time.
8. as each described method of utilizing cupping machine that pressing belt is carried out the cryogenic property test among the claim 1-3, wherein said predetermined speed is 0.05mm/min.
9. as each described cupping machine that utilizes among the claim 1-3 method that pressing belt carries out the cryogenic property test is wherein also comprised the step that pressing belt bearing capacity, amount of tension and stretching displacement are tested.
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| CN201110154344.4A CN102252915B (en) | 2011-06-09 | 2011-06-09 | A kind of cupping machine that utilizes carries out the method for cryogenic property test to pressing belt |
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| CN201110154344.4A CN102252915B (en) | 2011-06-09 | 2011-06-09 | A kind of cupping machine that utilizes carries out the method for cryogenic property test to pressing belt |
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| CN112710818A (en) * | 2020-12-23 | 2021-04-27 | 中冶路桥建设有限公司 | Method and device for evaluating low-temperature performance of asphalt pavement crack repairing material |
| CN113720703A (en) * | 2021-09-15 | 2021-11-30 | 南京林业大学 | Method for researching mechanism of graphene for enhancing mechanical properties of asphalt |
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| CN102980803A (en) * | 2012-11-19 | 2013-03-20 | 华南理工大学 | Stretching test fixture and stretching test method for pitch ultra-thin overlaying layer test piece |
| CN104198373B (en) * | 2014-08-26 | 2017-01-11 | 交通运输部公路科学研究所 | Test assembly and method for evaluating construction performance of seam sealing adhesive |
| CN104198685A (en) * | 2014-08-26 | 2014-12-10 | 交通运输部公路科学研究所 | Test assembly and method for evaluating road holding performance of seam sealing adhesive |
| CN105675852A (en) * | 2014-08-26 | 2016-06-15 | 交通运输部公路科学研究所 | Method for evaluating road surface driving performance of crack adhesive |
| CN104198373A (en) * | 2014-08-26 | 2014-12-10 | 交通运输部公路科学研究所 | Test assembly and method for evaluating construction performance of seam sealing adhesive |
| CN105675852B (en) * | 2014-08-26 | 2017-12-01 | 交通运输部公路科学研究所 | The method of the road traveling performance of evaluation patch seam glue |
| CN105784484A (en) * | 2016-04-26 | 2016-07-20 | 山西省交通科学研究院 | Crack filling material performance testing device |
| CN105784484B (en) * | 2016-04-26 | 2018-06-08 | 山西省交通科学研究院 | A kind of crack pointing performance testing device |
| CN106198941A (en) * | 2016-06-17 | 2016-12-07 | 哈尔滨工业大学 | A kind of method evaluating heat filling class base joint grouting glue high-temperature behavior |
| CN106198941B (en) * | 2016-06-17 | 2018-01-30 | 哈尔滨工业大学 | A kind of method evaluated heat and fill class base joint grouting glue high-temperature behavior |
| CN108280303A (en) * | 2018-01-30 | 2018-07-13 | 南京林业大学 | pitch data processing method and device |
| CN109357951A (en) * | 2018-10-26 | 2019-02-19 | 济南大学 | The method and device of material property extension test under a kind of low temperature |
| CN112710818A (en) * | 2020-12-23 | 2021-04-27 | 中冶路桥建设有限公司 | Method and device for evaluating low-temperature performance of asphalt pavement crack repairing material |
| CN113720703A (en) * | 2021-09-15 | 2021-11-30 | 南京林业大学 | Method for researching mechanism of graphene for enhancing mechanical properties of asphalt |
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| CN102252915B (en) | 2015-12-02 |
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