CN108645736A - A method of base's performance of flushing is measured by cross direction profiles Measuring Device - Google Patents
A method of base's performance of flushing is measured by cross direction profiles Measuring Device Download PDFInfo
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- CN108645736A CN108645736A CN201810391802.8A CN201810391802A CN108645736A CN 108645736 A CN108645736 A CN 108645736A CN 201810391802 A CN201810391802 A CN 201810391802A CN 108645736 A CN108645736 A CN 108645736A
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- measuring device
- cross direction
- direction profiles
- flushing
- track plate
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
- G01N3/567—Investigating resistance to wear or abrasion by submitting the specimen to the action of a fluid or of a fluidised material, e.g. cavitation, jet abrasion
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention relates to a kind of method measuring base's performance of flushing by cross direction profiles Measuring Device, including following steps are rapid：Step 1：Mix and stir cement stabilized macadam；Step 2：Forming double-layer track plate：By the volume of track plate die trial and the maximum dry density of cement stabilized macadam, amount of filler aftershaping bilayer track plate is calculated；Step 3：By the double-deck track plate test specimen prepared health 28 days at the standard conditions；Step 4：By the good test specimen of health, drying to constant weight, claims to obtain quality m1；Step 5：Open cross direction profiles formula Measuring Device, time 60min；Step 6：The double-deck track plate after experiment is taken out, drying to constant weight, claims to obtain quality m2, die trial weight m is claimed to obtain after demoulding3；Step 7：By erosion quantity=m1‑m2, scour rate=(m1‑m2)/(m1‑m3) obtain scour rate conclusion." cross direction profiles formula Measuring Device " in the method for the present invention is improved on the basis of common Measuring Device, and method is simple and easily operated.Therefore, the present invention has apparent economic and social benefit.
Description
Technical field
The invention belongs to building fields, are related to a kind of method measuring base's performance of flushing by cross direction profiles Measuring Device.
Background technology
During the use of road, moisture can be oozed by the crack of top course in people's road surface structare layer, into people road surface
The moisture of structure sheaf is generally difficult to evaporate.In rainy season, rainfall in continuous several days is possible to that the base under pavement crack is made to be in
Water-saturated state there is also flowable water when base and bad face layer combination in face layer and base's interface, vehicular load
Constantly acting on, which makes these flowable water generate powerful flowing pressure and be generated to base, washes away.When semi-rigid sub-base material antiscour
Face layer comes to nothing with base when scarce capacity, caused by washing away can cause the destruction of pavement structure.
To the scour resistance of base material, external test method mainly has rotating brush damage test method(s) and rotational shear examination
Method is tested, but the two has very big difference with actual pressure water stream souring.The test method that the country mainly uses has shake table
Test method(s) and the washout test method for applying impact force using MTS (material test system).
Rotating brush experiment is to carry out polish-brush effect to the surface of test specimen by the wire brush being rotating, and pass through different test specimens
The power of their erosion resistibilities is weighed by the number of the material granule weight under wire brush brush.This test method perhaps exists
To a certain extent to being simulated similar to mechanical abrasion phenomenon in the scour process of base, but do not related in entire experiment
And arrive water.Base material under road deck by the souring of flow during, not only have similar in mechanical movement
Wear phenomenon, and destruction and " pump-absorb action " of flowing pressure are more importantly generated under Driving Loading, this
A little factors are not all modeled in rotating brush experiment.Thus, evaluate the anti-of semi-rigid sub-base material with this test method
Scouring capability differs greatly with actual state.
French road researcher is tested using rotating brush or shake table to do the indoor performance of flushing of base material.Australia is big
The researcher of Leah also carries out washout test with shake table, and experiment conception is essentially identical with French shaketalle test, only
It is different on the detailed problems such as sample dimensions, vibration frequency.
An Chunying is easy to happen erosion damage problem in use for cement stabilized macadam base, proposes a kind of punching
Brush test method.Instrument by washout test machine, controllable air compressor machine, wash away the components such as cylinder and constitute.
The Chang An University sand love people pass through the research to semi-rigid type base scour resistance, it is proposed that antierosion experiment
Machine-MTS testing machines, the main scouring test methods for applying impact force using MTS, and move up and down by motor eccentric block
Test specimen is washed away in realization, passes through the controllable size for washing away number and external load power of these testing equipments.
What dogface is on the basis of analyzing semi-rigid sub-base material scour principle, it is proposed that is loaded using MTS test platforms
Mode evaluates the scour resistance of Cement Treated Material, and steady to PP (polypropylene) fibre reinforced cement using the method
The scour resistance for determining crushed stone material is studied.
On the basis of Chen Haifeng analyzes Cement Stable Macadam Mixture scour principle, propose to use antiscour test evaluation water
The scour resistance of cement-stabilizing broken stone cold regeneration mix carries out cement stabilized macadam cold regeneration mix scour resistance
Evaluation.It is tested by bobbing machine, is washed away using 5min (washing away number 3000 times) as a period, will be washed away again after finishing
Object is poured into second metal basin and is precipitated.Full 6 periods (always washing away number 18000 times) are done in experiment.All down washes are precipitated
The clear water of basin middle and upper part is carefully poured out after 8h, remaining sediment, which is put into baking oven, dries, and then weighs and records experiment knot
Fruit.Erosion quantity W is the ratio of the down wash weight G and period of time t of the period.
Zhu Tangliang, Tan Zhiming have carried out 3 class semi-rigid sub-base materials using the road material washout tester voluntarily researched and developed
The indoor washout test of 7d, 28d, 90d age, the standard that obtained are washed away number, are washed away between flowing pressure and cleavage strength
Relational expression.Research is found：As age increases, the antiscour coefficient of material has a declining tendency, and washes away the change of stress ratio index
Change it is smaller, substantially 1.8 or so, scour depth index by wash away flowing pressure and age influenced it is smaller, 1.8 or so；Freeze thawing
The antiscour coefficient of material, the influence for washing away stress ratio index can be given and being ignored, the decline of Anti brushing Performance can be attributed to
The decline of structural strength.In addition, the cleavage strength of reflection mortar cohesive action has more compared with the drag of washing away of compression strength and material
Good correlation.
Huang Jiancai, Wang Feng are opened using the scouring instrument voluntarily developed using 30min, 18000 erosion quantities as typical value
The cement stabilized macadam of two kinds of different types of structure of framework dense structure and suspension compact structure has been opened up in 7d, 14d, 28d age
Washout test.
Li Mingjie is when evaluating cement stabilized macadam scour resistance quality, it is contemplated that cause the amount of force washed away and
Act on material loss amount in number, scour process.Plat-bottom escape pattern is interpreted as anti-in flowing pressure caused by road surface is washed away
Multiple souring unit of going to a grassroots level washes away the pit slot volume generated on area, thus using material loss volume in scour process with
Area and effect number ratio wash away to characterize its antiscour energy in base.
Invention content
For overcome the deficiencies in the prior art, the present invention provides a kind of by cross direction profiles Measuring Device measurement base erosion
The method of energy.
The present invention provides the following technical solutions：
A method of it is rapid by cross direction profiles Measuring Device measurement base performance of flushing, including following steps：
Step 1：The mixture proportion of cement and the grading of cement stabilized macadam are drafted, determines the grading of cement stabilized macadam,
It determines cement stabilized macadam optimum moisture content and maximum dry density, then mixes mixing according to optimum moisture content and maximum dry density
Material；
Step 2：Forming double-layer track plate：By the volume of track plate die trial and the maximum dry density of cement stabilized macadam, meter
Calculate amount of filler aftershaping bilayer track plate；
Step 3：By the double-deck track plate test specimen prepared health 28 days at the standard conditions；
Step 4：By the good test specimen of health, drying to constant weight, claims to obtain quality m1；
Step 5：Open cross direction profiles formula Measuring Device, time 60min；
Step 6：Track plate after experiment is taken out, drying to constant weight, claims to obtain quality m2, and die trial weight is claimed to obtain after demoulding
m3；
Step 7：By erosion quantity=m1-m2, scour rate=(m1-m2)/(m1-m3) obtains scour rate conclusion.
It is preferably in the above scheme, in step 1, cement stabilized macadam optimum moisture content is determined using compaction test
And maximum dry density.
In any of the above-described scheme preferably, in step 2, a height of 300mm × 300mm of length and width of the double-deck track plate ×
80mm。
In any of the above-described scheme preferably, in step 3, standard conditions be 20 DEG C of temperature, relative humidity 95% with
On.
In any of the above-described scheme preferably, in step 4, the good test specimen of health is dried to perseverance under the conditions of 105 DEG C
Weight.
In any of the above-described scheme preferably, in step 5, experimental condition is that the water surface submerges track plate 15mm.
In any of the above-described scheme preferably, in step 5, experimental condition is rut pressure 0.7MPa.
In any of the above-described scheme preferably, in step 5, experimental condition is 42 times/min of longitudinal traveling speed, horizontal
To movement speed 10cm/min.
In any of the above-described scheme preferably, in step 5, experimental condition is lateral distance 20cm, travel time
60min。
In any of the above-described scheme preferably, the Measuring Device uses high precision numerical control horizontal movement workbench, complete
At Measuring Device horizontal motion, flatness reaches 0.01mm/ ㎡.
It is preferably in any of the above-described scheme, Measuring Device longitudinal direction linear precision and lateral linear precision are respectively less than etc.
In 0.01mm/m.
In any of the above-described scheme preferably, in step 6, the track plate taking-up after experiment is placed in 105 DEG C of conditions
It is lower that drying to constant weight.
" cross direction profiles formula Measuring Device " in the method for the present invention is improved on the basis of common Measuring Device, method letter
It is single and easily operated.Therefore, the present invention has apparent economic and social benefit.
The test method is mainly characterized by：
(1) it is further applied load as the dynamic traveling load of cross direction profiles, the actual forced status on closer road surface.
(2) there are certain attrition, the stress under the conditions of closer interlaminar separation other than souring.
(3) the double-deck track plate surrounding has the time of day of die trial limitation and water stability detritus mixture in pavement structure more
It is close.
(4) this method is slightly weak relative to the T0860-2009 test methods " pump-absorb action " in testing regulations, but flow is rushed
It is stronger to hit power.
Description of the drawings
Fig. 1 is in an a kind of preferred implementation of method measuring base's performance of flushing by cross direction profiles Measuring Device of the present invention
Experimental rig figure.
Specific implementation mode
In order to further appreciate that the technical characteristic of the present invention, the present invention is explained in detail with reference to specific embodiment
It states.Embodiment only has illustrative effect to the present invention, without the effect of any restrictions, those skilled in the art
The modification for any unsubstantiality made on the basis of the present invention should all belong to the scope of protection of the present invention.
A method of it is rapid by cross direction profiles Measuring Device measurement base performance of flushing, including following steps：
Step 1：The mixture proportion of cement and the grading of cement stabilized macadam are drafted, determines the grading of cement stabilized macadam,
It determines cement stabilized macadam optimum moisture content and maximum dry density, then mixes mixing according to optimum moisture content and maximum dry density
Material；
Step 2：Forming double-layer track plate：By the volume of track plate die trial and the maximum dry density of cement stabilized macadam, meter
Calculate amount of filler aftershaping bilayer track plate；
Step 3：By the double-deck track plate test specimen prepared health 28 days at the standard conditions；
Step 4：By the good test specimen of health, drying to constant weight, claims to obtain quality m1；
Step 5：Open cross direction profiles formula Measuring Device, time 60min；
Step 6：Track plate after experiment is taken out, drying to constant weight, claims to obtain quality m2, and die trial weight is claimed to obtain after demoulding
m3；
Step 7：By erosion quantity=m1-m2, scour rate=(m1-m2)/(m1-m3) obtains scour rate conclusion.
It is preferably in the above scheme, in step 1, cement stabilized macadam optimum moisture content is determined using compaction test
And maximum dry density.
Further, in step 2, a height of 300mm × 300mm of length and width × 80mm of the double-deck track plate.
Further, in step 3, standard conditions are 20 DEG C of temperature, and relative humidity is 95% or more.
Further, in step 4, by the good test specimen of health, drying to constant weight under the conditions of 105 DEG C.
Further, in step 5, experimental condition is that the water surface submerges track plate 15mm.
Further, in step 5, experimental condition is rut pressure 0.7MPa.
Further, in step 5, experimental condition is longitudinal traveling speed 42 times/min, transverse shifting speed 10cm/
min。
Further, in step 5, experimental condition is lateral distance 20cm, travel time 60min.
Further, the Measuring Device uses high precision numerical control horizontal movement workbench, completes Measuring Device level side
To movement, flatness reaches 0.01mm/ ㎡.
Further, Measuring Device longitudinal direction linear precision and lateral linear precision are respectively less than and are equal to 0.01mm/m.
Further, in step 6, drying to constant weight under the conditions of the track plate taking-up after experiment is placed in 105 DEG C.
The Measuring Device that the experimental study of the present invention uses is the HYCZ-6 of Beijing Space space flight observation and control technology research institute production
Novel and multifunctional automatic Measuring Device, dependable performance, Measure Precision be high, it is easy to operate, can also can longitudinally be transported with transverse movement
It moves, adjustable speed, submerging test can be done.The Measuring Device uses high precision numerical control horizontal movement workbench, and it is horizontal to complete Measuring Device
Direction moves, and flatness reaches 0.01mm/ ㎡.Vertical and horizontal movement is formed using ball screw and high-precision the linear guide.
Longitudinal linear precision and lateral linear precision are respectively less than and are equal to 0.01mm/m.
Cement stabilized macadam base is most common semi-rigid sub-base material, and the material of use is derived from Beijing building stones factory 0-
5mm, 5-10mm and 10-20mm third gear limestone virgin material.According to《Highway road surface construction technology detailed rules and regulations》JTG F20-2015
Above-mentioned material is carried out in different ways to wash away abrasion test.
Experimental group carries out verification experimental verification to verify this method using multigroup different contrast test group.According to《Highway
Constructing road foundation technical manual》The cement stabilized macadam grading recommended in JTG F20-2015, determines water-stable gravel grade
Match, then is verified by above-mentioned steps, experimental rig such as Fig. 1, test result such as table 1.As a control group, it uses《Highway engineering
Stabilized with inorganic binder testing of materials regulation》T 0860-2009 stabilized with inorganic binder materials are anti-in JTG E51-2009 specifications
Scouring test methods carry out control group experiment.
Embodiment 1
Experimental group using the contrast test group of multigroup different gradation mixture test to verify this method
Card, according to《Highway road surface construction technology detailed rules and regulations》The cement stabilized macadam grading recommended in JTG F20-2015 selects C-
Tri- kinds of water-stable gravel gradings of C-1, C-C-2, C-C-3 are verified as test group 1-3 further according to above-mentioned steps, experiment knot
Fruit such as table 1.
Table 1 washes away Abrasion test results
As a control group, it uses《Highway engineering stabilized with inorganic binder testing of materials regulation》JTG E51-2009 rule
T 0860-2009 stabilized with inorganic binder material antiscour test method carries out control group experiment in model, further according to above-mentioned steps
It verifies, test result such as table 2.The use of control group graded mixture control group 1-3 identical with test group.
Table 2 washes away Abrasion test results
The above results can be seen that in the same test group and control group, the washout test result of this method with《Highway
Engineered inorganic binder stabilizing material testing regulations》T 0860-2009 stabilized with inorganic binder materials in JTG E51-2009 specifications
Material antiscour test method washout test result is compared, and the rate of wear that washes away of test group and control group differs not under each grading
Greatly, line line equation is fitted to test group and control group data and finds that relative coefficient reaches 0.90, show that this method can have
It imitates washing away under simulation flowing pressure and wears away.
Claims (10)
1. a kind of method measuring base's performance of flushing by cross direction profiles Measuring Device, including following steps are rapid：
Step 1：The mixture proportion of cement and the grading of cement stabilized macadam are drafted, determines cement stabilized macadam optimum moisture content
And maximum dry density, then cement stabilized macadam is mixed and stirred according to optimum moisture content and maximum dry density；
Step 2：Forming double-layer track plate：By the volume of track plate die trial and the maximum dry density of cement stabilized macadam, calculating is filled out
Doses aftershaping bilayer track plate；
Step 3：By the double-deck track plate test specimen prepared health 28 days at the standard conditions；
Step 4：By the good test specimen of health, drying to constant weight, claims to obtain quality m1；
Step 5：Open cross direction profiles formula Measuring Device, time 60min；
Step 6：The double-deck track plate after experiment is taken out, drying to constant weight, claims to obtain quality m2, die trial weight is claimed to obtain after demoulding
m3；
Step 7：By erosion quantity=m1-m2, scour rate=(m1-m2)/(m1-m3) obtain scour rate conclusion.
2. the method for measuring base's performance of flushing by cross direction profiles Measuring Device as described in claim 1, it is characterised in that：Step
In rapid one, cement stabilized macadam optimum moisture content and maximum dry density are determined using compaction test.
3. the method for measuring base's performance of flushing by cross direction profiles Measuring Device as claimed in claim 2, it is characterised in that：Step
In rapid two, a height of 300mm × 300mm of length and width × 80mm of the double-deck track plate.
4. the method for measuring base's performance of flushing by cross direction profiles Measuring Device as claimed in claim 3, it is characterised in that：Step
In rapid three, standard conditions are 20 DEG C of temperature, and relative humidity is 95% or more.
5. the method for measuring base's performance of flushing by cross direction profiles Measuring Device as claimed in claim 4, it is characterised in that：Step
In rapid four, by the good test specimen of health, drying to constant weight under the conditions of 105 DEG C.
6. the method for measuring base's performance of flushing by cross direction profiles Measuring Device as claimed in claim 5, it is characterised in that：Step
In rapid five, experimental condition is that the water surface submerges track plate 15mm.
7. the method for measuring base's performance of flushing by cross direction profiles Measuring Device as claimed in claim 6, it is characterised in that：Step
In rapid five, experimental condition is rut pressure 0.7MPa.
8. the method for measuring base's performance of flushing by cross direction profiles Measuring Device as claimed in claim 7, it is characterised in that：Step
In rapid five, experimental condition is longitudinal traveling speed 42 times/min, transverse shifting speed 10cm/min.
9. the method for measuring base's performance of flushing by cross direction profiles Measuring Device as claimed in claim 8, it is characterised in that：Step
In rapid five, experimental condition is lateral distance 20cm, travel time 60min.
10. the method for measuring base's performance of flushing by cross direction profiles Measuring Device as claimed in claim 9, it is characterised in that：
The Measuring Device uses high precision numerical control horizontal movement workbench, completes Measuring Device horizontal motion, and flatness reaches
0.01mm/㎡。
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| CN201810391802.8A CN108645736A (en) | 2018-04-27 | 2018-04-27 | A method of base's performance of flushing is measured by cross direction profiles Measuring Device |
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| CN201810391802.8A CN108645736A (en) | 2018-04-27 | 2018-04-27 | A method of base's performance of flushing is measured by cross direction profiles Measuring Device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112082896A (en) * | 2020-09-29 | 2020-12-15 | 广西壮族自治区水利科学研究院 | Multi-gradient natural rainwater erosion resistance performance test device and test method |
-
2018
- 2018-04-27 CN CN201810391802.8A patent/CN108645736A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112082896A (en) * | 2020-09-29 | 2020-12-15 | 广西壮族自治区水利科学研究院 | Multi-gradient natural rainwater erosion resistance performance test device and test method |
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Application publication date: 20181012 |