CN201653832U - Test device for newly-mixed concrete volume compressibility coefficient under side limiting condition - Google Patents
Test device for newly-mixed concrete volume compressibility coefficient under side limiting condition Download PDFInfo
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- CN201653832U CN201653832U CN 201020163425 CN201020163425U CN201653832U CN 201653832 U CN201653832 U CN 201653832U CN 201020163425 CN201020163425 CN 201020163425 CN 201020163425 U CN201020163425 U CN 201020163425U CN 201653832 U CN201653832 U CN 201653832U
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Abstract
The utility model discloses a test device for newly-mixed concrete volume compressibility coefficient under side limiting condition, consisting of a loading system, a collecting system and a material gathering system, wherein mixed concrete with set water cement ratio is loaded into the material gathering system to collect initial volume data; the loading system is used for exerting vibrating load on the newly-mixed concrete, a long-stroke displacement sensor is used for testing the volume compression deformation of the newly-mixed concrete during and after vibrating, finally a data processing system outputs the volume compressibility coefficient of the newly-mixed concrete under side limiting condition during and after vibrating. The test device can be used for studying the volume compression coefficient of the newly-mixed concrete under different water cement ratios and vibrating energy and the internal relations between the modulus of compressibility and the concrete early strength, long-term strength, durability and other important performance indexes, and can provide fountainhead technical support for the structure design, construction and operation of the concrete.
Description
Technical field
The utility model relates to a kind of proving installation of volume compression coefficient of freshly mixed concrete under side-limit condition.Specifically relate to the long Stroke Displacement Transducer of a kind of employing piezoelectric type, the device of fresh concrete coefficient of volume compressibility after process is vibrated in the process neutralization of vibrating under the test lateral confinement condition.
Background technology
Present stage, each country all was that the concrete test block (cube or right cylinder) later to moulding carries out the axle center compression test to the test of concrete modulus in compression, obtained axial compression value and radial drawing value, then derived concrete modulus in compression after the moulding.This class testing method is only considered concrete modulus in compression after the moulding, and the coefficient of volume compressibility of fresh concrete is not then related to.
In addition, present stage has possessed the function of test fresh concrete quality by the fresh concrete analyzer that manufacturer provides, and comprises mensuration concrete water-cement ratio, the slump, pours into the mould degree and estimate 28 days intensity.When implementing to measure, one special probe inserted in the sample rotate, suffered resistance calculates concrete water cement ratio, the slump and 28 days intensity automatically when utilizing measuring sonde to rotate in concrete, utilize its subsidiary software data download from instrument, and carry out quality verification after making analysis also.This quasi-instrument is only tested the material parameter of fresh concrete (water cement ratio, the slump, pour into mould degree etc.), and can't realize that the mechanical property (modulus in compression etc.) to fresh concrete tests.
And early age strength of concrete, later strength, permanance etc. certainly will be when building concrete coefficient of volume compressibility closely related.Simultaneously, as the direct sign of mechanical performance of concrete, good cubic compressive strength, prism axial compressive strength equal strength index are to guarantee many important concrete works safety, durable necessary condition.
At present, mensuration to concrete strength all (GBJ107-87) is carried out according to " Standard for inspection and assessment of strength of concrete ", fresh concrete is built in die trial and is finished and according to after certain curing condition maintenance moulding, the compressive strength of concrete test block after test moulding on the testing machine.Promptly test the method for concrete crushing strength at present, be based on all that molded concrete test block carries out, all do not relate to and measure the coefficient of volume compressibility of fresh concrete under the load action that vibrates, the coefficient of volume compressibility of also not setting up fresh concrete and concrete are in early days or the relation of later strength.And in fact, the coefficient of volume compressibility of fresh concrete and concreting molding effect and concrete formation quality have inevitable mutual relationship.
The utility model content
In order to overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of proving installation of volume compression coefficient of freshly mixed concrete under side-limit condition.
In order to realize above-mentioned purpose, the utility model is realized by following technical characterictic:
The proving installation of fresh concrete compressibility coefficient under a kind of lateral confinement condition is made of loading system, acquisition system and system's three parts of gathering materials, and the system that gathers materials fixed placement is in the top of loading system, and acquisition system is connected to the system that gathers materials.
The proving installation of fresh concrete compressibility coefficient under the aforementioned lateral confinement condition, described loading system involving vibrations charger, vibration Loading Control System.
The described system that gathers materials is located on the vibration charger of loading system, comprise charging basket, drainage cushion block, portal three parts, wherein charging basket be positioned at the below of the system that gathers materials and be located at the vibration charger above, portal is fixed on the top of charging basket bucket wall, and the drainage cushion block is pressed in the end face of the fresh concrete that holds in the charging basket.
Described acquisition system comprises the long Stroke Displacement Transducer of piezoelectric type, data collecting instrument, data handling system, long Stroke Displacement Transducer is installed between drainage bed course and the portal, the stiff end of long Stroke Displacement Transducer is installed on the portal of the system that gathers materials, induction end is installed in the end face of drainage bed course, and the long Stroke Displacement Transducer of piezoelectric type, data collecting instrument, data handling system connect successively.
The aforementioned charging basket of stating is a cylindrical shape, the diameter of charging basket base plate is greater than the charging basket diameter, and on base plate, axially be provided with some mounting holes, be used for charging basket is fixed on charger, top at the charging basket outer wall is provided with teat symmetrically, radially be provided with mounting hole on teat, portal is connected with charging basket by these mounting holes.
The principle of work of proving installation that the utility model provides is:
The system loading fresh concrete that gathers materials applies level and vertical vibration by loading system to the system that gathers materials, and has the fresh concrete volume that absorbs under the lateral confinement condition behind the vibrational energy to change.Directly record fresh concrete in vibration processes and the cubic deformation amount after the vibration by acquisition system, and then extrapolate the coefficient of volume compressibility of fresh concrete under the lateral confinement condition.
Beneficial effect: adopt proving installation provided by the utility model, can study the coefficient of volume compressibility or the modulus in compression of fresh concrete under Different Water-Cement Ratio, the vibrational energy effect, thereby disclose the inner link between the important performance indexes such as the coefficient of volume compressibility of fresh concrete or modulus in compression and early age strength of concrete, later strength, permanance, the design, construction and the operation that can be xoncrete structure provide the source technical support.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described:
Fig. 1 is the structural representation of the proving installation of a kind of volume compression coefficient of freshly mixed concrete under side-limit condition provided by the utility model;
Fig. 2 is the system architecture synoptic diagram that gathers materials of the proving installation of a kind of volume compression coefficient of freshly mixed concrete under side-limit condition provided by the utility model;
Fig. 3 is the schematic three dimensional views of steel charging basket in the system that gathers materials of proving installation of a kind of volume compression coefficient of freshly mixed concrete under side-limit condition provided by the utility model;
Fig. 4 is in the loading procedure and the W/C=0.40 displacement-time curve figure of vibration behind the loaded;
Fig. 5 is in the loading procedure and the W/C=0.50 displacement-time curve figure of vibration behind the loaded.
Being described as follows of each Reference numeral in the accompanying drawing:
Portal 1, long Stroke Displacement Transducer 2, drainage bed course 3, charging basket 4, fresh concrete 5, vibration charger 6, vibration Loading Control System 7, data collecting instrument 8, data handling system 9, coupling bolt 10.
Embodiment
Below in conjunction with accompanying drawing, the utility model is elaborated:
Fig. 1 is the structural representation of the proving installation of a kind of volume compression coefficient of freshly mixed concrete under side-limit condition provided by the utility model.Fig. 2 is the system architecture synoptic diagram that gathers materials of the proving installation of a kind of volume compression coefficient of freshly mixed concrete under side-limit condition provided by the utility model.With reference to Fig. 1, shown in Figure 2, the proving installation of fresh concrete compressibility coefficient under the lateral confinement condition is made of loading system, acquisition system and system's three parts of gathering materials, and the system that gathers materials is fixed on the top of loading system, and acquisition system is connected to the system that gathers materials.
Wherein loading system involving vibrations charger 6, the vibration Loading Control System 7; The system that gathers materials is located on the pedestal of loading system, comprise charging basket 4, drainage cushion block 3, portal 1 three parts, form by the steel processing and fabricating, wherein charging basket 4 be positioned at the below of the system that gathers materials and be located at vibration charger 6 above, portal 1 is fixed on the top of charging basket bucket wall, and drainage cushion block 3 is pressed in the end face of the fresh concrete 5 that holds in the charging basket; Acquisition system comprises the long Stroke Displacement Transducer 2 of piezoelectric type and data collecting instrument 8, data handling system 9, long Stroke Displacement Transducer 2 is installed between drainage bed course 3 and the portal 1, the stiff end of long Stroke Displacement Transducer 2 is installed on the portal 1 of the system that gathers materials, induction end is installed in the end face of drainage bed course 3, and the long Stroke Displacement Transducer 2 of piezoelectric type, data collecting instrument 8, data handling system 9 connect successively.
Fig. 3 is the schematic three dimensional views of charging basket in the system that gathers materials of proving installation of a kind of volume compression coefficient of freshly mixed concrete under side-limit condition provided by the utility model.With reference to shown in Figure 3, charging basket is a cylindrical shape, the diameter of charging basket base plate is greater than the charging basket diameter, and on base plate, axially be provided with some mounting holes, be used for charging basket is fixed on vibration charger 6, top at the charging basket outer wall is provided with teat symmetrically, radially is provided with mounting hole on teat, and portal 1 is connected with the charging basket bucket by these mounting holes.
Embodiment 1
The proving installation of volume compression coefficient of freshly mixed concrete under side-limit condition is made and number of assembling steps:
The first step: adopt the steel plate of wide 500mm, thick 20mm to make the charging basket 4 of the system that gathers materials; Adopt channel bar to make portal 1; On the base plate of charging basket, evenly stay and establish 8 bolts hole, be used for connecting gather materials system and loading system.
Second step: test acquisition system, to grow Stroke Displacement Transducer 2, data collecting instrument 8 and data handling system 9 assembled formations, the displacement of the long Stroke Displacement Transducer 2 of manual shift, it is intact to judge according to the displacement time-history curves of reflection in the data handling system 9 whether acquisition system connects.
The 3rd step: the test loading system, regulate vibration loading direction and vibration acceleration value in the vibration Loading Control System, whether 6 work of test vibration charger are normal.
The 4th step: after system to be loaded and acquisition system test finish, charging basket 4 is mounted on the vibration charger 6.
The 5th step: fresh concrete 5 is poured in the charging basket 4, and put drainage cushion block 3 at TOC.
The 6th step: portal 1 is installed is fixed to charging basket 4 tops and by coupling bolt 10, the sensing part of long Stroke Displacement Transducer 2 is installed between drainage cushion block 3 and the portal 1, the stiff end of long Stroke Displacement Transducer 2 is fixed on the portal 1, and induction end is fixed on the drainage bed course 3.
According to test findings, draw in the vibration loading procedure and the displacement-time curve figure behind the vibration loaded.Fig. 4 is in the loading procedure and the W/C=0.40 displacement-time curve figure of vibration behind the loaded.Fig. 5 is in the loading procedure and the W/C=0.50 displacement-time curve figure of vibration behind the loaded.As Fig. 4, shown in Figure 5, wherein the parameter of Fig. 4 is vibration acceleration (VAL)=4.5g, water-cement ratio (W/C)=0.40, r * h=100 * 600mm, vibration load time (t)=30s, the parameter among Fig. 5 is vibration acceleration (VAL)=4.5g, water-cement ratio (W/C)=0.50, r * h=100 * 600mm, vibration load time (t)=30s.
Two stage fresh concrete coefficient of volume compressibility under each test parameters condition of table 1.
Above-mentioned embodiment does not limit the technical solution of the utility model in any form, and the technical scheme that mode obtained that every employing is equal to replacement or equivalent transformation all drops on protection domain of the present utility model.
Claims (5)
1. the proving installation of fresh concrete compressibility coefficient under the lateral confinement condition is characterized in that being made of loading system, acquisition system and system's three parts of gathering materials, and the system that gathers materials is positioned on the loading system, and acquisition system is connected to the system that gathers materials.
2. according to the proving installation of fresh concrete compressibility coefficient under the described lateral confinement condition of claim 1, it is characterized in that described loading system involving vibrations charger (6) and vibration Loading Control System (7).
3. the proving installation of fresh concrete compressibility coefficient under the lateral confinement condition according to claim 1, it is characterized in that the described system that gathers materials comprises charging basket (4), drainage cushion block (3), portal (1) three part, wherein charging basket (4) be positioned at the below of the system that gathers materials and be located at vibration charger (6) above, portal (1) is fixed on the top of charging basket (4) bucket wall, and drainage cushion block (3) is pressed in the end face of the fresh concrete (5) that holds in the charging basket (4).
4. the proving installation of fresh concrete compressibility coefficient under the lateral confinement condition according to claim 1, it is characterized in that described acquisition system comprises the long Stroke Displacement Transducer (2) of piezoelectric type, data collecting instrument (8), data handling system (9), long Stroke Displacement Transducer (2) is installed between drainage cushion block (3) and the portal (1), the table body portion of the long Stroke Displacement Transducer of piezoelectric type (2) is installed on the portal (1) of the described system that gathers materials, stiff end is installed on the portal (1) of the system that gathers materials, induction end is installed in the end face of drainage cushion block (3), the long Stroke Displacement Transducer (2) of piezoelectric type, data collecting instrument (8), data handling system (9) connects successively.
5. the proving installation of fresh concrete compressibility coefficient under the lateral confinement condition according to claim 3, it is characterized in that axially being provided with on the described charging basket base plate some being used for is fixed on mounting hole on the charger with charging basket, top at the charging basket outer wall is provided with teat symmetrically, radially be provided with mounting hole on teat, portal (1) is fixedlyed connected with charging basket by these mounting holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020163425 CN201653832U (en) | 2010-04-15 | 2010-04-15 | Test device for newly-mixed concrete volume compressibility coefficient under side limiting condition |
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| CN 201020163425 CN201653832U (en) | 2010-04-15 | 2010-04-15 | Test device for newly-mixed concrete volume compressibility coefficient under side limiting condition |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813610A (en) * | 2010-04-15 | 2010-08-25 | 河海大学 | Testing device of volume compression coefficient of freshly mixed concrete under side-limit condition and testing method thereof |
| CN103033419A (en) * | 2012-12-15 | 2013-04-10 | 山东中复船艇科技发展有限公司 | Device and method for detecting tension of marine glass fibre reinforced plastic vertical connecting plate |
| US20190072524A1 (en) * | 2012-04-05 | 2019-03-07 | Cidra Corporate Services Llc | Speed of sound and/or density measurement using acoustic impedance |
-
2010
- 2010-04-15 CN CN 201020163425 patent/CN201653832U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813610A (en) * | 2010-04-15 | 2010-08-25 | 河海大学 | Testing device of volume compression coefficient of freshly mixed concrete under side-limit condition and testing method thereof |
| CN101813610B (en) * | 2010-04-15 | 2015-04-29 | 河海大学 | Testing device of volume compression coefficient of freshly mixed concrete under side-limit condition and testing method thereof |
| US20190072524A1 (en) * | 2012-04-05 | 2019-03-07 | Cidra Corporate Services Llc | Speed of sound and/or density measurement using acoustic impedance |
| CN103033419A (en) * | 2012-12-15 | 2013-04-10 | 山东中复船艇科技发展有限公司 | Device and method for detecting tension of marine glass fibre reinforced plastic vertical connecting plate |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20130415 |