CN105784544B - A kind of experimental method for being used to determine filling cut of asphaltum road surface viscosity of material requirement - Google Patents
A kind of experimental method for being used to determine filling cut of asphaltum road surface viscosity of material requirement Download PDFInfo
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- CN105784544B CN105784544B CN201511016546.7A CN201511016546A CN105784544B CN 105784544 B CN105784544 B CN 105784544B CN 201511016546 A CN201511016546 A CN 201511016546A CN 105784544 B CN105784544 B CN 105784544B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
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Abstract
The invention discloses a kind of experimental method for being used to determine filling cut of asphaltum road surface viscosity of material requirement, claimed using cementation of fissures interface coverage rate to the viscosity of filling cut of asphaltum road surface material.The present invention is suitable for determining for various filling cut of asphaltum road surface viscosity of material requirement, and after the method for the invention, the repairing effect of asphalt pavement crack significantly improves, and avoids the generation of crack extension.
Description
Technical field
The present invention relates to a kind of experimental method for being used to determine filling cut of asphaltum road surface viscosity of material requirement, belong to road engineering
Technology.
Background technology
Crack disease is most common Damage Types during bituminous paving use, general to be dripped using the method for the cementation of fissures
Blue or green pavement crack reparation.But during the cementation of fissures of actual bitumen concrete road surface cracks, many materials are excessive due to viscosity
It can not penetrate into inside crack, cause gap-grouting material to rest on fracture faces or only penetrate into very little part, seriously affected reparation effect
Fruit.Therefore, to ensure the cementation of fissures repairing effect of asphalt pavement crack, the requirement to filling cut of asphaltum road surface viscosity of material need to be proposed.
However, China is mostly empirically to be determined to the viscosity requirement of filling cut of asphaltum road surface material at present, lack determining for science
Method.For this reason, the present invention proposes a kind of test method for being used to determine filling cut of asphaltum road surface viscosity of material requirement.
The content of the invention
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention provides a kind of for determining bituminous paving
The experimental method of gap-grouting material viscosity requirement, for determining the viscosity requirement of filling cut of asphaltum road surface material；Cementation of fissures interface is covered
Rate corresponding viscosity at 85~95% is the viscosity requirement to filling cut of asphaltum road surface material.
Technical solution：To achieve the above object, the technical solution adopted by the present invention is：
A kind of experimental method for being used to determine filling cut of asphaltum road surface viscosity of material requirement, using cementation of fissures interface coverage rate to drip
The viscosity of blue or green pavement seam filling material claims, and cementation of fissures interface coverage rate is filling cut of asphaltum road surface material on crack side circle
Area coverage and the ratio of the side interface gross area on face.
According to mechanics of materials correlation theory, when the timing of stress intensity one, pulling force or shearing are directly proportional to tension shear(ing) area.
The crack of bituminous paving is corresponded to, after filling cut of asphaltum road surface material is circulated into crack, filling cut of asphaltum road surface material sheet
The tensile strength of body and the product of contact area are the pulling force limiting value that can bear, and shearing is also identical.Therefore, for fixation
Filling cut of asphaltum road surface material for, cementation of fissures interface coverage rate is bigger, and the success rate of reparation is higher.Multiple laboratory test results table
Bright, when cementation of fissures interface coverage rate is not less than 90%, repairing effect is preferable.Therefore, we determined that being covered with 90% cementation of fissures interface
Rate is to determine the threshold value of viscosity requirement, it is desirable to which the viscosity of repair materials is less than identified viscosity.
Specifically, this method comprises the following steps：
(1) the miniature bituminous concrete of equal proportion is prepared according to the structure of crack bituminous paving first and tests beam, then will
Experiment beam is broken or sawed-off, the crack for simulation bituminous paving that fracture is stitched together, according to the fracture width tune of bituminous paving
Save fracture spacing；
(2) with the both sides and lower part of masking foil parcel fracture, fracture top is reserved, by the bituminous paving of a certain viscosity undetermined
Gap-grouting material is poured into fracture by fracture top；
(3) after filling cut of asphaltum road surface material no longer flows, the masking foil around experiment beam is removed, separately tests beam, point
Cementation of fissures interface of the filling cut of asphaltum road surface material of a certain viscosity undetermined on two sides of fracture is not calculated with gridding method
Coverage rate is simultaneously averaged；
(4) the filling cut of asphaltum road surface material of another viscosity undetermined is replaced, it is another to obtain this to step (3) for repeat step (1)
Cementation of fissures interface coverage rate of the filling cut of asphaltum road surface material of viscosity undetermined on two sides of fracture is simultaneously averaged；
(5) according to obtained two average values and corresponding viscosity, 90% cementation of fissures circle is determined by the way of linear interpolation
Viscosity corresponding to the coverage rate of face, the viscosity are viscosity requirement of the crack bituminous paving to filling cut of asphaltum road surface material；When true
When arriving crack bituminous paving surely to the viscosity requirement of filling cut of asphaltum road surface material, with the filling cut of asphaltum road surface less than the viscosity requirement
Material carries out the cementation of fissures to the crack of bituminous paving.
Beneficial effect：Experimental method provided by the present invention for determining the requirement of filling cut of asphaltum road surface viscosity of material, implements
Process is simple, and after the method for the present invention, the repairing effect of asphalt pavement crack significantly improves, and avoids the hair of crack extension
It is raw.
Brief description of the drawings
Fig. 1 is the schematic diagram for the fracture cementation of fissures reparation that beam is tested in the method for the present invention；
Fig. 2 is the schematic diagram that gridding method calculates cementation of fissures interface coverage rate；
In figure：1 is filling cut of asphaltum road surface material, and 2 be experiment beam.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings.
A kind of experimental method for being used to determine filling cut of asphaltum road surface viscosity of material requirement, includes the following steps：
Step 1：The miniature bituminous concrete of equal proportion is prepared according to the structure of crack bituminous paving first and tests beam, so
Experiment beam is broken or sawed-off afterwards, the crack for simulation bituminous paving that fracture is stitched together is wide according to the crack of bituminous paving
Degree adjusts fracture spacing；
Step 2：With the both sides and lower part of masking foil parcel fracture, fracture top is reserved, by the pitch of a certain viscosity undetermined
Pavement seam filling material is poured into fracture by fracture top；
Step 3：After filling cut of asphaltum road surface material no longer flows, the masking foil around experiment beam is removed, separately experiment
Beam, is calculated the cementation of fissures of the filling cut of asphaltum road surface material of a certain viscosity undetermined on two sides of fracture with gridding method respectively
Interface coverage rate is simultaneously averaged；
Step 4：The filling cut of asphaltum road surface material of another viscosity undetermined is replaced, repeat step (1) is somebody's turn to do to step (3)
Cementation of fissures interface coverage rate of the filling cut of asphaltum road surface material of another viscosity undetermined on two sides of fracture is simultaneously averaged；
Step 5：According to two obtained average values and corresponding viscosity, 90% filling is determined by the way of linear interpolation
The viscosity corresponding to the coverage rate of interface is stitched, which is viscosity requirement of the crack bituminous paving to filling cut of asphaltum road surface material；
When determine to crack bituminous paving to the viscosity requirement of filling cut of asphaltum road surface material when, with the bituminous paving less than the viscosity requirement
Gap-grouting material carries out the cementation of fissures to the crack of bituminous paving.
The present invention is made further instructions with reference to embodiment.
There are a large amount of cracks in certain section of SMA-13 road surface, and live crack investigation shows that most cracks are more than 1mm cracks；
Implementation steps are as follows：
Step 1：One group of SMA girder test specimen is made, the size of girder test specimen is 380cm × 50cm × 50cm.Girder is sawed
It is disconnected, then fracture is stitched together and simulates the crack of bituminous paving, at a distance of 1mm between fracture.
Step 2：SMA girder fracture lower parts and both sides are wrapped up using masking foil, only stay top.Then using viscosity as
The repair materials A of 3000mPas is poured into the crack between fracture.
Step 3：After gap-grouting material A stablizes and no longer flows, the masking foil around girder is removed, girder is separated, with grid
Method calculates coverage rate of the repair materials on two side section of girder, is respectively 76% and 78%, and it is 77% to take average result.
Step 4：Repeat the above steps, the repair materials cementation of fissures using viscosity as 1000mPas, calculates interface coverage rate
For 93%.Determine that the viscosity requirement corresponding to 90% interface coverage rate is about 1375mPas with linear interpolation method.
Because the section overwhelming majority fracture width is in more than 1mm, therefore, the present embodiment using 1mm as control width requirement,
Determine the viscosity requirement of repair materials.Repair materials viscosity selected by this section should be not more than 1375mPas.
The above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (3)
- A kind of 1. experimental method for being used to determine filling cut of asphaltum road surface viscosity of material requirement, it is characterised in that：Using cementation of fissures interface Coverage rate claims the viscosity of filling cut of asphaltum road surface material, and cementation of fissures interface coverage rate exists for filling cut of asphaltum road surface material Area coverage and the ratio of the side interface gross area on the interface of crack side；By cementation of fissures interface coverage rate at 85~95% Corresponding viscosity is as the viscosity requirement to filling cut of asphaltum road surface material；This method comprises the following steps：(1) the miniature bituminous concrete of equal proportion is prepared according to the structure of crack bituminous paving first and tests beam, then will experiment Beam is broken or sawed-off, the crack for simulation bituminous paving that fracture is stitched together, disconnected according to the adjusting of the fracture width of bituminous paving Mouth spacing；(2) with the both sides and lower part of masking foil parcel fracture, fracture top is reserved, by the filling cut of asphaltum road surface of a certain particular viscosity Material is poured into fracture by fracture top；(3) after filling cut of asphaltum road surface material no longer flows, remove experiment beam around masking foil, separately test beam, respectively with Cementation of fissures interface covering of the filling cut of asphaltum road surface material of a certain particular viscosity on two sides of fracture is calculated in gridding method Rate is simultaneously averaged；(4) the filling cut of asphaltum road surface material of another particular viscosity is replaced, it is another specific to obtain this to step (3) for repeat step (1) Cementation of fissures interface coverage rate of the filling cut of asphaltum road surface material of viscosity on two sides of fracture is simultaneously averaged；(5) according to obtained two average values and corresponding viscosity, 85~95% cementation of fissures circle are determined by the way of linear interpolation Viscosity corresponding to the coverage rate of face, the viscosity are viscosity requirement of the crack bituminous paving to filling cut of asphaltum road surface material.
- 2. the experimental method according to claim 1 for being used to determine filling cut of asphaltum road surface viscosity of material requirement, its feature exist In：By cementation of fissures interface coverage rate, corresponding viscosity is the viscosity requirement to filling cut of asphaltum road surface material at 90%.
- 3. the experimental method according to claim 1 for being used to determine filling cut of asphaltum road surface viscosity of material requirement, its feature exist In：When determine to crack bituminous paving to the viscosity requirement of filling cut of asphaltum road surface material when, with the pitch less than the viscosity requirement Pavement seam filling material carries out the cementation of fissures to the crack of bituminous paving.
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| CN107560962B (en) * | 2017-09-22 | 2020-10-30 | 广东省长大公路工程有限公司 | Thermal load test device and method for epoxy resin waterproof layer for pouring type asphalt pavement |
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