CN104359794B - A kind of plate-type ballastless track closed cavity self-compacting concrete static stability evaluation method and device - Google Patents
A kind of plate-type ballastless track closed cavity self-compacting concrete static stability evaluation method and device Download PDFInfo
- Publication number
- CN104359794B CN104359794B CN201410662917.8A CN201410662917A CN104359794B CN 104359794 B CN104359794 B CN 104359794B CN 201410662917 A CN201410662917 A CN 201410662917A CN 104359794 B CN104359794 B CN 104359794B
- Authority
- CN
- China
- Prior art keywords
- self
- closed cavity
- compacting concrete
- concrete
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The present invention relates to a kind of plate-type ballastless track closed cavity self-compacting concrete static stability evaluation method and device, this method testing procedure：1) autodensing concrete almixture is loaded from interstitial hole 1；2) mixture is flowed freely on a base plate 2；3) after full of whole die cavity 3, mixture rises to certain altitude from peep hole 4；4) stop irrigating when mixture is highly in fill orifice 1 and peep hole is highly consistent；5) after static 15 minutes, the needle penetration of peep hole and fill orifice is tested using the penetrometer 5 of given size and quality；6) needle penetration and peep hole 4 and the needle penetration of fill orifice 1 of test peep hole 4 are poor；7) after after self-compacting concrete final set, concrete in fill orifice and peep hole is rived, the distance between measurement coarse aggregate and upper top surface.Simulation filling process self-compacting concrete flow regime in plate-type ballastless track closed cavity of the invention true, with simple operation, measuring accuracy it is high, suitable for scene the features such as.
Description
Technical field：
The invention belongs to the technical field of measurement and test of construction material, and in particular to a kind of plate-type ballastless track closed cavity is from close
The static method for estimating stability of real concrete and device, it is adaptable to self-compacting concrete, Cracking of High Flowing Concrete static stability
Evaluation, be particularly suitable for use in high-speed railway CRTS II plate-types ballastless track turnouts and CRTS type IIIs plate-type ballastless track envelope
The evaluation of mold closing chamber self-compacting concrete stability.
Background technology：
With concrete material itself intelligent power realize structure from filling and self-compaction function be using material property come
Solution is caused the important technical revolution of Structural Endurance Problem by construction factor.It is used as the typical generation of intelligent power concrete
Table --- self-compacting concrete because its height can application property, Technical Economy and environment friendly be applied to it is autonomous with China
In the CRTS type III platy ballastless track structures of intellectual property.The special structure of CRTS type III plate-type ballastless track filling beds
Form, new technical requirements are proposed to filling bed with self-compacting concrete：The filling bed closed die that track plates are constituted with base
Chamber determines that self-compacting concrete should have high self-leveling can be with good foam stability energy.In filling bed closed cavity space
The multiple inhibition such as the door rebar of limited impression and track plates bottom on reinforced mesh, base requires that filling layer concrete should
With good clearance through, from Packing character and education resistance.The water suction of filling bed bottom geotextiles separation layer flexible foundation
Characteristic and great friction coefficient determine that filling bed self-compacting concrete should possess high fluidity and high-moisture-retention.In plate-type ballastless
The self-compacting concrete that this closed cavity of track is used, should consider that self-compacting concrete has enough mobility, from close
Real concrete can irrigate whole die cavity；Consider that self-compacting concrete has appropriate stability again, in self-compacting concrete
The aggregate that filling process and perfusion are finished in rear self-compacting concrete quiescing process, autodensing concrete almixture must not occur
Isolation.Research currently for self-compacting concrete stability is more, it was also proposed that some detection methods.Foreign Japan and
American-European self-compacting concrete Specification, China's Specification proposes phase to self-compacting concrete Detection of Stability
The index answered,《Self-compacting concrete direction of design and construction》The examination of mixture stability jumping table is proposed in (CCES 02-2004)
Test, it is proposed that coarse aggregate vibration isolation rate is not more than 10% requirement.Accordingly,《Autodensing concrete almixture stability test
Device》(ZL 200720062718.9) is open to know clearly using static state isolation post method to evaluate the steady of autodensing concrete almixture
It is qualitative, the device include Detection of Stability cylinder and jumping table, Detection of Stability honor be by three section sizes it is identical (a diameter of φ 115mm,
Height 100mm) cylinder stack together, most descend pitch circle column casing be provided with bottom plate, Detection of Stability cylinder be placed in jumping table.Two cylindrical drums
Joint is provided with prominent side, and blending bolt is fixed.The internal diameter of the cylindrical drum is 115mm, is highly 100mm.Described jumping table
Amplitude is 25 ± 2mm, and vibration per second 1 time, vibration number is 25 times.《Self-compacting concrete direction of design and construction》(CCES
02-2004) propose self-compacting concrete hardenite homogeneity and should meet the thickness of maturing upper surface screed and be less than
15mm requirement, but do not provide corresponding detection method.《Self-compacting concrete application technology code》(CECS 203-2006)
Self-compacting concrete education resistance is evaluated in proposition with V-type funnel passage time, and self-compacting concrete education resistance is divided into
Three Estate, one-level：10-25s, two grades：7-25s, three-level：4-25s.The capacity of V-type funnel is about 10L, and making material can be
Metal or plastics, at the position of leak discharging opening provided with the quick bottom opened and there is watertightness.《Self-compacting concrete application
Technical regulation》(JGJ/T 283-2012) proposes using isolation rate and coarse aggregate vibration isolation rate two indices to evaluate from close
The education resistance of real concrete, isolation rate is divided into two grades, i.e., less than 20% and less than 15%, and isolation rate Cleaning Principle is base
Aggregate sinks under static state in autodensing concrete almixture, in test cylinder (total height 300mm) upper strata (60mm)
Mortar accounts for the ratio of concrete, and mortar is that the square hole screen for crossing 5mm using concrete is obtained；Coarse aggregate vibrates isolation rate test method
With evaluation criterion with《Self-compacting concrete direction of design and construction》Equally.With the expansion of self-compacting concrete application,
The stability of autodensing concrete almixture turns into the key for determining its application, and numerous scholars gradually begin one's study self-compaction coagulation
Soil static stability and dynamic stability.The evaluation of self-compacting concrete stability can substantially be divided into several major classes：The first kind is
Estimation of stability is visualized, this method is while self-compacting concrete divergence is determined, be distributed according to aggregate in mixture,
Around bleeding ring by the analysis of stability of self-compacting concrete be four grades, the features such as this method has simple and easy to apply, and by
Include《Test Method for Slump Flow of Self-Consolidating Concrete》(ASTM C 1611-
2014).Equations of The Second Kind is sieve analysis, takes 10 ± 0.5L autodensing concrete almixtures to be placed in bucket, and is closed the lid, in level
The concrete that a barrel top (4.8 ± 0.2) kg is weighed after place standing 15min pours into square hole screen from sieve top 50 ± 5cm positions, claims
Mass ratio of the amount by the mortar of sieve with taking concrete.3rd class is static isolation post method, and this method is to mix self-compaction
In the cylinder of one more piece cylinder of solidifying soil, in static a period of time test the superiors and orlop autodensing concrete almixture
Aggregate distribution, this method has been included into《Test Method for Static Segregation of Self-
Consolidating Concrete Using Column Technique》(ASTM C1610-2014).4th class its other party
Method, other method includes electrical conductivity method, sinks to test method(s) etc., but not yet carries out Practical Project in conceptual phase more than these methods
Using.Substantially, the stability of self-compacting concrete refers to be filled into stability when being remained static in entity structure, this
When self-compacting concrete pass through multiple processes such as horizontal transport, pumping, free-flowing, autodensing concrete almixture it is steady
Qualitative is not the stability in laboratory in MIX PROPORTION DESIGN OF SELF-COMPACTING CONCRETE.Current self-compacting concrete static stability
There is problems with evaluation：One is the influence for not accounting for external force factor to autodensing concrete almixture stability；Two be not have
Have and consider self-compacting concrete flow regime and state when reaching stable in entity structure；Three are the absence of being directed to board-like nothing
The evaluation of self-compacting concrete stability under tiny fragments of stone, coal, etc. track closed cavity operating mode.
The content of the invention：
The present invention is for lacking high-speed railway plate type ballastless track closed cavity self-compacting concrete static stability evaluation
Present situation, invented it is a kind of have visualization, suitable for scene and can the objective board-like self-compacting concrete of simulation in non-fragment orbit
The mixture method for estimating stability and device of flow regime in closed cavity, to realize to high-speed railway plate type ballastless track certainly
The field control of air-free concrete mixture stability, proposes the present invention.
Technical scheme：A kind of plate-type ballastless track closed cavity self-compacting concrete static stability evaluation side
Method and device, the testing procedure of this method：1) autodensing concrete almixture is loaded from interstitial hole 1；2) mixture is in bottom plate 2
It is upper to flow freely；3) after full of whole die cavity 3, mixture rises to certain altitude from peep hole 4；4) mixed in fill orifice 1
Stop irrigating when compound height and highly consistent peep hole；5) static 15 minutes, using the penetrometer 5 of given size and quality
Test the needle penetration of peep hole and fill orifice；6) needle penetration and peep hole 4 and the needle penetration of fill orifice 1 of test peep hole 4
Difference；7) finally concrete in fill orifice and peep hole is rived after after self-compacting concrete final set, measurement coarse aggregate and upper top surface
The distance between.
Described plate-type ballastless track closed cavity self-compacting concrete static stability evaluation method and device, its feature
It is：The device is to be made up of the closed cavity with a fill orifice and two peep holes with penetrometer.
Described closed cavity is made up of lucite, and size is 100cm × 100cm × 20cm.Fill orifice and observation
The size in hole is φ 10cm × 40cm.
The bottom plate of described closed cavity can be dismantled, and geotextiles can be laid on bottom plate.
Described penetrometer is the cylindrical drum of aluminium alloy or plastics, and internal diameter, height and thickness are respectively 75mm, 50mm with
1mm, weight is 40-60g.
Described needle penetration test, perfusion is finished after static 15 minutes, and penetrometer is in peep hole and fill orifice respectively measurement 3
Individual point.
Described aggregate settling height test is that after concrete final set, the concrete in peep hole and fill orifice is taken out
After rive, measurement 10mm aggregates apart from upper surface distance.
The mechanism of the present invention：Pass through the closed cavity and perfusion work of realistic simulation plate-type ballastless track self-compacting concrete layer
Condition, fully reflection self-compacting concrete flow regime in die cavity, closed cavity use lucite material, can mix self-compaction
Solidifying soil flow regime visualization, there is provided fill orifice and peep hole, utilize the fill orifice higher than closed cavity and the portion of peep hole
Point, the static stability of test autodensing concrete almixture.
Advantages of the present invention：(1) true simulation self-compacting concrete flow regime in non-fragment orbit closed cavity, can
Play the construction quality of control self-compacting concrete；(2) test equipment is simple, and method of testing is convenient, is applicable not only to laboratory
Self-compacting concrete is prepared, and is also applied for the quality control of job site self-compacting concrete.
Brief description of the drawings：
Fig. 1 is the structural representation of one embodiment of the invention.
Fig. 2 is the structural representation of closed cavity in Fig. 1.
Fig. 3 is the structural representation of penetrometer in Fig. 1.
In figure：1- fill orifices, 2- bottom plates, 3- closed cavities, 4- peep holes, 5- penetrometers.
Embodiment：
Below by embodiment, and with reference to accompanying drawing, technical scheme is further illustrated.
Embodiment 1：Autodensing concrete almixture is loaded into fill orifice 1, autodensing concrete almixture is allowed in die cavity
Flow freely, after self-compacting concrete reaches four weeks, will gradually with die cavity upper surface, reach to a certain degree, mixture
It will be overflowed from peep hole, and when mixture is higher by die cavity 20cm, stop perfusion, after static 15 minutes, tested with penetrometer 5
The needle penetration of peep hole and fill orifice.After needle penetration head is placed 15-20 seconds, the depth of penetration of penetrometer is read.Work as injection
When depth is less than 20mm, self-compacting concrete has preferable static stability.
Embodiment 2：Autodensing concrete almixture is loaded into fill orifice 1, autodensing concrete almixture is allowed in die cavity
Flow freely, after self-compacting concrete reaches four weeks, will gradually with die cavity upper surface, reach to a certain degree, mixture
It will be overflowed from peep hole, and when mixture is higher by die cavity 20cm, stop perfusion, after static 15 minutes, tested with penetrometer 5
The needle penetration of peep hole and fill orifice.After needle penetration head is placed 15-20 seconds, the depth of penetration of penetrometer is read.From close
After real concrete final set, the self-compacting concrete in peep hole and fill orifice is taken out, is rived along center, measure 10mm aggregates
With the distance of upper surface, when 10mm aggregates are less than 10mm with upper surface distance, self-compacting concrete has preferably static state steady
It is qualitative.
The above-mentioned description to embodiment is it will be appreciated that and using this for ease of those skilled in the art
Invention.Person skilled in the art obviously can easily make various modifications to these embodiments, and illustrating herein
General Principle be applied in other embodiment without passing through performing creative labour.Therefore, the invention is not restricted to reality here
Example is applied, those skilled in the art are according to the announcement of the present invention, and the improvement made for the present invention and modification all should be in the present invention
Protection domain within.
Claims (6)
1. a kind of plate-type ballastless track closed cavity self-compacting concrete static stability evaluation method, it is characterised in that：1) from
Autodensing concrete almixture is irrigated in interstitial hole；2) mixture is flowed freely on bottom plate (2)；3) when in closed cavity (3)
During full of mixture, continue to irrigate, until mixture rises to certain altitude and with mixing in fill orifice (1) in peep hole (4)
Stop perfusion when compound is highly consistent；4) after standing 15 minutes, tested and observed using the penetrometer (5) of given size and quality
Hole (4) and the needle penetration of fill orifice (1)；5) after after self-compacting concrete final set, by the concrete in fill orifice and peep hole
Rive, the distance between measurement coarse aggregate and upper top surface.
2. plate-type ballastless track closed cavity self-compacting concrete static stability evaluation method according to claim 1,
It is characterized in that：Device used in this method is by closed cavity and needle penetration with a fill orifice and two peep holes
Instrument is constituted.
3. plate-type ballastless track closed cavity self-compacting concrete static stability evaluation method according to claim 1,
It is characterized in that：Closed cavity is made up of lucite, and size is 100cm × 100cm × 20cm, fill orifice and peep hole
Size is
4. plate-type ballastless track closed cavity self-compacting concrete static stability evaluation method according to claim 1,
It is characterized in that：The bottom plate of closed cavity can be dismantled.
5. plate-type ballastless track closed cavity self-compacting concrete static stability evaluation method according to claim 1,
It is characterized in that：Perfusion is finished after static 15 minutes, and penetrometer respectively measures 3 points in peep hole and fill orifice.
6. plate-type ballastless track closed cavity self-compacting concrete static stability evaluation method according to claim 1,
It is characterized in that：After concrete final set, rived after the concrete in peep hole and fill orifice is taken out, measure 10mm aggregate distances
The distance of upper surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410662917.8A CN104359794B (en) | 2014-11-20 | 2014-11-20 | A kind of plate-type ballastless track closed cavity self-compacting concrete static stability evaluation method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410662917.8A CN104359794B (en) | 2014-11-20 | 2014-11-20 | A kind of plate-type ballastless track closed cavity self-compacting concrete static stability evaluation method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104359794A CN104359794A (en) | 2015-02-18 |
| CN104359794B true CN104359794B (en) | 2017-09-19 |
Family
ID=52527077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410662917.8A Active CN104359794B (en) | 2014-11-20 | 2014-11-20 | A kind of plate-type ballastless track closed cavity self-compacting concrete static stability evaluation method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104359794B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104777078B (en) * | 2015-05-11 | 2017-06-09 | 中南大学 | Filling bed self-dense concrete mixture stability testing device and its method of testing |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4582750B2 (en) * | 2001-09-28 | 2010-11-17 | 株式会社フジタ | Test method for evaluating the material separation resistance of concrete |
| JP5010936B2 (en) * | 2007-02-14 | 2012-08-29 | 宇部興産株式会社 | Concrete fluidity evaluation test method and apparatus |
| CN201016975Y (en) * | 2007-03-16 | 2008-02-06 | 中南大学 | Self-dense concrete mixture stability testing device |
| CN202018414U (en) * | 2010-12-23 | 2011-10-26 | 中国铁道科学研究院铁道建筑研究所 | Working performance comprehensive test device for self-filling concrete for high speed railway slab ballastless tracks |
| CN103926392A (en) * | 2014-04-14 | 2014-07-16 | 浙江建设职业技术学院 | Testing device for working performance of self-compacting concrete |
-
2014
- 2014-11-20 CN CN201410662917.8A patent/CN104359794B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104359794A (en) | 2015-02-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104360047B (en) | A kind of plate-type ballastless track closes die cavity self-compacting concrete dynamic stability evaluation methodology and device | |
| CN104865156B (en) | A kind of cement concrete isolation degree evaluation device and its evaluation method | |
| CN102749439B (en) | Test and evaluation device for segregation of fresh concrete | |
| CN104777078B (en) | Filling bed self-dense concrete mixture stability testing device and its method of testing | |
| CN103675244B (en) | Concrete homogeneity testing method | |
| CN102815902A (en) | Preparation and application method of high-strength large-flow shrinkage-free cement slurry | |
| Cui et al. | Deterioration of soil-cement piles in a saltwater region and its influence on the settlement of composite foundations | |
| CN109884285A (en) | A kind of test method for Under Concrete isolation degree of vibrating | |
| Tian-shun | Model for compaction density and engineering properties of light weight soil | |
| Lu et al. | Accelerated testing of cement treated Singapore marine clay cured under elevated temperature | |
| Liu et al. | Construction techniques and quality test and evaluation of lightweight cellular concrete mixed with fly ash as subgrade material | |
| Li et al. | Influence of steel fiber distribution on splitting damage and transport properties of ultra-high performance concrete | |
| CN104359794B (en) | A kind of plate-type ballastless track closed cavity self-compacting concrete static stability evaluation method and device | |
| Fang et al. | Effect of concrete surface roughness on shear strength of frozen soil–concrete interface based on 3D printing technology | |
| Omran et al. | Portable pressure device to evaluate lateral formwork pressure exerted by fresh concrete | |
| CN106969955A (en) | Composite mortar penetration type sub-surface compound Unconfined compressive sample preparation method | |
| Montero-Cubillo et al. | Pull-out creep laboratory test for soft rocks | |
| CN204613058U (en) | A kind of cement concrete segregation degree evaluation device | |
| Ding et al. | A laboratory investigation into the composite bonding system of cement-emulsified asphalt-epoxy resin | |
| CN205786186U (en) | Concrete disintegration evaluating apparatus under a kind of horizontal centrifugal effect | |
| CN208819499U (en) | A kind of railway bed is risen soil teaching demonstration device | |
| Chompoorat | Dynamic properties of cement treated clay | |
| Pousley | Investigating Alternative Construction Methods for Air Entrained Grout Enriched Roller Compacted Concrete | |
| Jian-feng | Numerical modeling of reinforced soil segmental retaining walls under real toe restraint conditions | |
| CN107782595A (en) | A kind of method that air bubble mix light-textured soil sample is prepared using the temperature difference |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |