CN1301405C - Device for measuring permeability of concrete - Google Patents
Device for measuring permeability of concrete Download PDFInfo
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- CN1301405C CN1301405C CNB200410043839XA CN200410043839A CN1301405C CN 1301405 C CN1301405 C CN 1301405C CN B200410043839X A CNB200410043839X A CN B200410043839XA CN 200410043839 A CN200410043839 A CN 200410043839A CN 1301405 C CN1301405 C CN 1301405C
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Abstract
The present invention relates to a device for measuring the permeability of concrete, particularly to a device for measuring the performance of concrete. The upper end of the lower end of a sample (1) are respectively communicated with one end of each of two water pipes (2), the other end of each of the two water pipes (2) is connected and is communicated with the bottom of a liquid storage tank (5), the upper half part of the liquid storage tank (5) is connected with the output end of a pressure regulator (3) through a check valve (14), the left end and the right end of the sample (1) are respectively connected with two input ends of a measuring circuit (6) through conductors, the output end of the measuring circuit (6) is connected with the input end of an A/D circuit (7), the output end of the A/D circuit (7) is connected with the data input end of a computer (8), the output end of the computer (8) is connected with the control end of a motor (4), and the output end of the motor (4) is connected with the input end of the pressure regulator (3) through a coupling (15). The device overcomes the defects of time wasting and low precision in existing methods for measuring the permeability of concrete, and the device has the advantages of time saving and accuracy.
Description
Technical field
The present invention relates to a kind of measurement mechanism of concrete performance, specifically relate to a kind ofly can test measuring device for permeability of concrete.
Background technology
Concrete perviousness and its intensity and permanance are closely related, are the important indicators of estimating concrete quality.Available coagulation soil permeability method of testing has hydraulic pressure test method and electric quantity test method.The hydraulic pressure test method is to add hydraulic pressure on concrete sample, and as anti-penetration grade, or the sample of riving is measured the height of water infiltration in the sample with permeable pressure.This method not only the test duration long, and measure inaccurately, error is bigger.The electric quantity test method is that sample is immersed in the conducting solution, and conductive ion dissolves in sample, and under extra electric field, the electric weight that flows through sample by measurement is tested concrete perviousness, but this method is also more time-consuming.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can quick and precisely test measuring device for permeability of concrete.The present invention comprises sample part 1, water pipe 2, pressure governor 3, motor 4, fluid reservoir 5, reverse checkvalve 14, shaft coupling 15, metering circuit 6, A/D circuit 7, computing machine 8; The sample part is communicated with an end of two water pipes 2 respectively at two ends about in the of 1, the other end tandem of two water pipes 2 also is communicated with the bottom of fluid reservoir 5, the first half of fluid reservoir 5 is connected with the output terminal of pressure governor 3 by reverse checkvalve 14, the front end of sample part 1, the rear end, left end, right-hand member is connected by the input end of lead with metering circuit 6 respectively, the output terminal of metering circuit 6 is connected with the input end of A/D circuit 7, the output terminal of A/D circuit 7 is connected with the data input pin of computing machine 8, the output terminal of computing machine 8 is connected with the control end of motor 4, and the output terminal of motor 4 is connected with the input end of pressure governor 3 by shaft coupling 15; Be filled with salt solution in the water pipe 2 during test, 1 equivalence of sample part is for sample resistance and insert metering circuit, the process of sample part infiltration water is the process that the sample resistance descends, and computing machine just can be measured the perviousness of sample exactly by measuring sample resistance and this changes in resistance rate.Concrete sample among the present invention is owing to done the processing of embedding pipe fittings, under hydraulic action, can make the osmotic effect of salt solution obvious, computing machine continuous automatic measurement sample resistance, overcome the not high drawback of time-consuming precision in the available coagulation soil permeability method of testing, made this device have to save time, advantage accurately.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present invention, and Fig. 2 is the longitudinal sectional view of sample part 1,
Fig. 3 is the vertical view of sample part 1, and Fig. 4 is the structural representation of pressure governor 3 and shaft coupling 15, and Fig. 5 is the structural representation of metering circuit 6.
Embodiment
Embodiment one: present embodiment is with reference to Fig. 1, and it is made up of sample part 1, water pipe 2, pressure governor 3, motor 4, fluid reservoir 5, reverse checkvalve 14, shaft coupling 15, metering circuit 6, A/D circuit 7, computing machine 8.The sample part is communicated with an end of two water pipes 2 respectively at two ends about in the of 1, the other end tandem of two water pipes 2 also is communicated with the bottom of fluid reservoir 5, the first half of fluid reservoir 5 is connected with the output terminal of pressure governor 3 by reverse checkvalve 14, the front end of sample part 1, the rear end, left end, right-hand member is connected by the input end of lead with metering circuit 6 respectively, the output terminal of metering circuit 6 is connected with the input end of A/D circuit 7, the output terminal of A/D circuit 7 is connected with the data input pin of computing machine 8, the output terminal of computing machine 8 is connected with the control end of motor 4, and the output terminal of motor 4 is connected with the input end of pressure governor 3 by shaft coupling 15.Described sample part 1 is as Fig. 2, shown in Figure 3, it is by concrete sample 1-1, Insulating frame 1-2, battery lead plate 1-3, nut 1-4, screw 1-5, embedding pipe fittings 1-6 forms, the front end of concrete sample 1-1, the rear end, left end, right-hand member respectively is fixed with the metal electrode board 1-3 of a symmetry, fixed outside at four metal electrode board 1-3 has Insulating frame 1-2, Insulating frame 1-2 is by screw 1-5, nut 1-4 fixes, screw 1-5 front end compresses battery lead plate 1-3, screw 1-5 end inserts metering circuit by lead, the both ends of the surface up and down of concrete sample 1-1 respectively have embedding pipe fittings 1-6, and embedding pipe fittings 1-6 is communicated with water pipe 2.Equivalent resistance is the sample resistance R between the A of sample part 1, B
AB, equivalent resistance is the sample resistance R between the C of sample part 1, D
CDDescribed pressure governor 3, as shown in Figure 4, it is by piston 3-1, screw rod 3-2, tube-like envelope 3-3 forms, and piston 3-1 is set in the tube-like envelope 3-3, the end of screw rod 3-2 is connected with piston 3-1, the other end of screw rod 3-2 is connected with an end of shaft coupling 15, described metering circuit as shown in Figure 5, it is by resistance R
1, resistance R
2, the sample resistance R
AB, the sample resistance R
CD, direct supply E forms.Resistance R
1, resistance R
2Be two identical outer meeting resistances of resistance, resistance R
1With the sample resistance R
ABBe connected in series resistance R
1The other end be connected the sample resistance R with the positive pole of direct supply E
ABThe other end be connected resistance R with the negative pole of direct supply E
2With the sample resistance R
CD, be connected in series resistance R
2The other end be connected the sample resistance R with the positive pole of direct supply E
CDThe other end be connected resistance R with the negative pole of direct supply E
1The voltage at two ends is U
1, resistance R
2The voltage at two ends is U
2, voltage U
1, voltage U
2Output terminal connect the input end of A/D circuit 7 respectively.The used A/D converter of the present invention is selected 5G14433 range 2V precision 1mv for use, and motor 4 is selected stepper motor for use.Principle of work: sample part 1 connects water pipe 2, is full of salt solution in the water pipe 2, and it is setting value that computer-controlled stepper motor 4 is regulated the interior hydraulic pressure of pressure governor 3 maintenance water pipes.Computing machine continuous automatic measurement sample resistance and calculated resistance rate of change, under the situation that hydraulic pressure voltage remains unchanged, the process that salt solution infiltrates sample is the process that sample resistance descends, and uses sample resistance change rate Δ R/R (Δ R is an increased resistance value) can measure concrete perviousness rapidly and accurately within a certain period of time.
Embodiment two: with reference to Fig. 1, what this embodiment and embodiment one were different is that the water pipe 2-2 that is communicated with sample part 1 upper and lower side also is connected with water filling port 9 by reverse checkvalve 10.Perfusion salt solution is convenient like this.
Embodiment three: with reference to Fig. 1, what this embodiment and embodiment one were different is that increasing again has handwheel 11, handwheel 11 to be installed on the manual control end of motor 4, can regulate and control pressure governor 3 with handwheel 11.
Embodiment four: with reference to Fig. 1, what this embodiment and embodiment one were different is on the convergence point and the water pipe 2-1 between the fluid reservoir 5 of two water pipes 2, pressure transducer 12, tensimeter 13 to be installed also.Can observe the pressure in the water pipe 2 so more intuitively.
Claims (7)
1, concrete permeability measurement apparatus, it comprises sample part (1), water pipe (2), pressure governor (3), motor (4), fluid reservoir (5), reverse checkvalve (14), shaft coupling (15), metering circuit (6), A/D circuit (7), computing machine (8), it is characterized in that sample part (1) is communicated with an end of two water pipes (2) respectively at two ends up and down, the other end tandem of two water pipes (2) also is communicated with the bottom of fluid reservoir (5), the first half of fluid reservoir (5) is connected with the output terminal of pressure governor (3) by reverse checkvalve (14), the front end of sample part (1), the rear end, left end, right-hand member is connected by the input end of lead with metering circuit (6) respectively, the output terminal of metering circuit (6) is connected with the input end of A/D circuit (7), the output terminal of A/D circuit (7) is connected with the data input pin of computing machine (8), the output terminal of computing machine (8) is connected with the control end of motor (4), and the output terminal of motor (4) is connected with the input end of pressure governor (3) by shaft coupling (15).
2, concrete permeability measurement apparatus according to claim 1, it is characterized in that described sample part (1) is by concrete sample (1-1), Insulating frame (1-2), battery lead plate (1-3), nut (1-4), screw (1-5), embedding pipe fittings (1-6) is formed, the front end of concrete sample (1-1), the rear end, left end, right-hand member respectively is fixed with the metal electrode board (1-3) of a symmetry, fixed outside at four metal electrode boards (1-3) has Insulating frame (1-2), Insulating frame (1-2) is by screw (1-5), nut (1-4) is fixing, screw (1-5) front end compresses battery lead plate (1-3), screw (1-5) is terminal to insert metering circuit by lead, the both ends of the surface up and down of concrete sample (1-1) respectively have embedding pipe fittings (1-6), and embedding pipe fittings (1-6) is communicated with water pipe (2).
3, concrete permeability measurement apparatus according to claim 1, it is characterized in that described pressure governor (3) is made up of piston (3-1), screw rod (3-2), tube-like envelope (3-3), piston (3-1) is set in the tube-like envelope (3-3), one end of screw rod (3-2) is connected with piston (3-1), and the other end of screw rod (3-2) is connected with an end of shaft coupling (15).
4, concrete permeability measurement apparatus according to claim 1 is characterized in that described metering circuit (6) is by resistance R
1, resistance R
2, the sample resistance R
AB, the sample resistance R
CD, direct supply E forms resistance R
1, resistance R
2Be two identical outer meeting resistances of resistance, resistance R
1With the sample resistance R
ABBe connected in series resistance R
1The other end be connected the sample resistance R with the positive pole of direct supply E
ABThe other end be connected resistance R with the negative pole of direct supply E
2With the sample resistance R
CDBe connected in series resistance R
2The other end be connected the sample resistance R with the positive pole of direct supply E
CDThe other end be connected resistance R with the negative pole of direct supply E
1The voltage at two ends is U
1, resistance R
2The voltage at two ends is U
2, voltage U
1, voltage U
2Output terminal connect the input end of A/D circuit (7) respectively.
5, concrete permeability measurement apparatus according to claim 1 is characterized in that the water pipe (2-2) that is communicated with sample part (1) upper and lower side also is connected with water filling port (9) by reverse checkvalve (10).
6, concrete permeability measurement apparatus according to claim 1 is characterized in that it increases again handwheel (11) is arranged, and handwheel (11) is installed on the manual control end of motor (4).
7, concrete permeability measurement apparatus according to claim 1 is characterized in that on the convergence point of two water pipes (2) and the water pipe (2-1) between the fluid reservoir (5) pressure transducer (12), tensimeter (13) being installed also.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410043839XA CN1301405C (en) | 2004-08-27 | 2004-08-27 | Device for measuring permeability of concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410043839XA CN1301405C (en) | 2004-08-27 | 2004-08-27 | Device for measuring permeability of concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1598562A CN1598562A (en) | 2005-03-23 |
| CN1301405C true CN1301405C (en) | 2007-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200410043839XA Expired - Fee Related CN1301405C (en) | 2004-08-27 | 2004-08-27 | Device for measuring permeability of concrete |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100487419C (en) * | 2006-01-26 | 2009-05-13 | 同济大学 | Annular detecting instrument for concrete gas seepage coefficient and detecting method |
| CN101470107B (en) * | 2007-12-27 | 2013-02-13 | 河南理工大学 | Concrete body and test instrument thereof and method for permeation performance with other medium bonding surface |
| CN101514978B (en) * | 2009-04-02 | 2013-09-25 | 河海大学 | Test method for studying phenomenon of permeable damage on soil body and test device thereof |
| CN103487570B (en) * | 2013-09-29 | 2015-06-03 | 北京航空航天大学 | Method for testing accelerated life of reinforced concrete in chloride environment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4979390A (en) * | 1988-12-01 | 1990-12-25 | Morris Schupack | Method and apparatus for testing relative permeability of materials |
| US5219388A (en) * | 1992-01-17 | 1993-06-15 | University Of Florida | Method and apparatus for testing water permeability of concrete |
| JPH06317560A (en) * | 1993-04-30 | 1994-11-15 | Tokyo Electric Power Co Inc:The | Estimation method of compression strength of concrete by rapid chlorine ion permeability test |
| JPH07229822A (en) * | 1994-02-16 | 1995-08-29 | Yasuo Tanigawa | Method and apparatus for testing gap permeability of fresh concrete |
| JPH07229824A (en) * | 1994-02-16 | 1995-08-29 | Yasuo Tanigawa | Method and apparatus for testing gap permeability of fresh concrete |
| CN1249427A (en) * | 1999-09-10 | 2000-04-05 | 清华大学 | Rapid evaluation method for concrete permeability |
| CN1512162A (en) * | 2002-12-31 | 2004-07-14 | 湖北省建筑科学研究设计院 | Method for detecting concrete permeability by solution air pressure method |
-
2004
- 2004-08-27 CN CNB200410043839XA patent/CN1301405C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4979390A (en) * | 1988-12-01 | 1990-12-25 | Morris Schupack | Method and apparatus for testing relative permeability of materials |
| US5219388A (en) * | 1992-01-17 | 1993-06-15 | University Of Florida | Method and apparatus for testing water permeability of concrete |
| JPH06317560A (en) * | 1993-04-30 | 1994-11-15 | Tokyo Electric Power Co Inc:The | Estimation method of compression strength of concrete by rapid chlorine ion permeability test |
| JPH07229822A (en) * | 1994-02-16 | 1995-08-29 | Yasuo Tanigawa | Method and apparatus for testing gap permeability of fresh concrete |
| JPH07229824A (en) * | 1994-02-16 | 1995-08-29 | Yasuo Tanigawa | Method and apparatus for testing gap permeability of fresh concrete |
| CN1249427A (en) * | 1999-09-10 | 2000-04-05 | 清华大学 | Rapid evaluation method for concrete permeability |
| CN1512162A (en) * | 2002-12-31 | 2004-07-14 | 湖北省建筑科学研究设计院 | Method for detecting concrete permeability by solution air pressure method |
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| CN1598562A (en) | 2005-03-23 |
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