CN1696649A - Method for testing compressive strength of pit sand concrete in high strength grade through rebound tester without damage - Google Patents
Method for testing compressive strength of pit sand concrete in high strength grade through rebound tester without damage Download PDFInfo
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- CN1696649A CN1696649A CN 200510003070 CN200510003070A CN1696649A CN 1696649 A CN1696649 A CN 1696649A CN 200510003070 CN200510003070 CN 200510003070 CN 200510003070 A CN200510003070 A CN 200510003070A CN 1696649 A CN1696649 A CN 1696649A
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Abstract
A non-destructive method for detecting compression strength of high grade mountain sand concrete by using resiliometer uses resiliometer with impact energy of 5.5 Joule and carbonization depth detector of 0 - 8 mm concrete as tools to detect structure or structural component deposited by concrete formed by mountain sand in diameter of 0.08 - 8.0 mm and prepared in unit weight of 2200 - 2800 kg / cu m with strength of 50 Mpa - 90 Mpa. The detection point and area are determined by assigned method.
Description
Technical field
The present invention relates to a kind of detection method, particularly a kind of non-damage detection method of on-site concrete compressive strength.
Background technology
Usually the detection of concrete crushing strength is to adopt moulding concrete cube test specimen (on pressure testing machine, to carry out the method that pressure test is obtained concrete compression strength value as 10 * 10 * 1cm, 15 * 15 * 15cm, 20 * 20 * 20cm.
The on-the-spot non-damage detection method of concrete crushing strength be one just in developing emerging technology, still be in the exploratory stage.For example: in xoncrete structure that is used in construction project or member, unit weight is at 2200～2800kg/m
3Between, intensity adopts the high strength grade rock sand concrete of particle diameter in the preparation of the mountain of 0.08～8.0mm sand at 50MPa～90MPa.Because detection method and requirement is uncertain, the conclusion that obtains is widely different, is difficult to reflect concrete compressive strength exactly, usually causes dispute.
Summary of the invention
The objective of the invention is to, provide a kind of reisilometer the non-damaged compressive strength of pit sand concrete in high strength grade method that detects.In xoncrete structure that is used in construction project or member, unit weight is at 2200～2800kg/m
3Between, compressive strength adopts the high strength grade rock sand concrete of particle diameter in the preparation of the mountain of 0.08～8.0mm sand at 50MP～90MPa, adopts the present invention can reflect concrete compressive strength index exactly.
Technical scheme of the present invention.The non-damaged compressive strength of pit sand concrete in high strength grade method that detects of reisilometer is characterized in that: undertaken by following step;
Determining of a, detected object: be used for the xoncrete structure or the member of construction project, its unit weight is at 2200～2800kg/m
3Between, intensity adopts the concrete of particle diameter in the preparation of the mountain of 0.08～8.0mm sand at 50MP～90MPa;
Determining of b, testing tool: impact energy is 5.5 joules a reisilometer, 0～8mm concrete carbonization depth analyzer;
C, detection method: for single structure or member, get and be no less than 10 and survey the district, each is surveyed to survey in the district and reads 16 resilience readings; Measure on the structure or member finish in resilience, choose again and be no less than the mensuration that 30% survey district carries out concrete carbonization depth;
D, measured value are handled: reject 3 maximum numbers and 3 minimum numbers from survey 16 the resilience readings in district, the arithmetic mean of remaining 10 resilience readings is surveyed the rebound value in district for this; To the concrete of carbonation depth≤8mm, intensity is between 50～90MPa the time, and the rebound value of mensuration and concrete crushing strength should satisfy following requirement;
Compressive strength (MPa) rebound value
90 ≥40.8
85 ≥39.6
80 ≥38.4
75 ≥37.1
70 ≥35.7
65 ≥34.2
60 ≥32.5
55 ≥30.8
50 ≥28.9。
Non-damaged the detection in the compressive strength of pit sand concrete in high strength grade method of above-mentioned reisilometer, the rebound value in each survey district and rock sand concrete compressive strength rate are preferably and should satisfy following requirement in the steps d;
Compressive strength (MPa) rebound value
90 ≥43.0
85 ≥41.8
80 ≥40.6
75 ≥39.2
70 ≥37.8
65 ≥36.3
60 ≥34.6
55 ≥32.9
50 ≥31.1。
Non-damaged the detection in the compressive strength of pit sand concrete in high strength grade method of aforesaid reisilometer, what the rebound value in each survey district and rock sand concrete compressive strength were best in the steps d is to satisfy following requirement;
Compressive strength (MPa) rebound value
90 ≥44.0
85 ≥42.8
80 ≥41.6
75 ≥40.3
70 ≥38.9
65 ≥37.4
60 ≥35.7
55 ≥34.0
50 ≥32.1。
Non-damaged the detection in the compressive strength of pit sand concrete in high strength grade method method of aforesaid reisilometer, the survey district among the step c preferably should satisfy, and area is not less than 0.02m
2, adjacent two spacings of surveying the district are no more than 3m; 16 resilience readings that survey is read should satisfy, and each measuring point is evenly distributed on to be surveyed in the district, and the clear distance of adjacent two measuring points is not less than 30mm.
Non-damaged the detection in the compressive strength of pit sand concrete in high strength grade method of aforesaid reisilometer, when having among the step c by batch detection requirements, should get structure or member sum 30% and the structure of getting or number of components must not be less than 10 and detect.
Non-damaged the detection in the compressive strength of pit sand concrete in high strength grade method of aforesaid reisilometer, reisilometer among the step b is meant that the elastic hammer impingement length is that 100mm, elastic stem front end spherical radius are that 18.0mm, Rockwell's hardness are that its rate definite value is 83 ± 2 high-strength reisilometer on the riveting stake of HRC 60 ± 2.
Compared with the prior art, the present invention is through repeatedly practising, sum up, conclude and screen a kind of detection method towards special object of acquisition.For unit weight at 2200～2800kg/m
3Between, intensity adopts high strength grade rock sand concrete structure or the member of particle diameter in the preparation of the mountain of 0.08～8.0mm sand at 50MPa～90MPa, adopts the present invention can reflect concrete compressive strength index exactly.The present invention can directly detect member at the scene, and the right and wrong breakage method that adopts, and the member after can continue to use after testing.In the assessment and judicial expertise that the present invention can be applicable to build after quality control in building construction project and inspection of quality, existed building and the calamity.
Embodiment
Embodiment 1.With reisilometer high strength grade rock sand concrete is carried out non-damaged detection of compressive strength, is undertaken by following step:
The unit weight of a, detected object is 2450kg/m
3About, strength grade is C60 (60MPa), adopts the concrete of particle diameter in 5mm and the mountain sand preparation below the 5mm, the beam of moulding by casting, 60 days its length of time.
B, testing tool: impact energy is 5.5 joules, and the elastic hammer impingement length is that 100mm, elastic stem front end spherical radius are that 18.0mm, Rockwell's hardness are that its rate definite value is 83 ± 2 reisilometer and 0～8mm concrete carbonization depth analyzer on the riveting stake of HRC 60 ± 2.Reisilometer and carbonation depth analyzer all have the commercially available prod.
C, any 1 beams of concrete of extraction detect.Arrange 10 and survey the district on this beams of concrete, survey area is 0.15 * 0.15m, and adjacent two spacings of surveying the district are got 0.3m; Survey in each surveys the district and read 16 resilience readings, measuring point evenly distributes in surveying the district, and the clear distance of adjacent two measuring points is not less than 30mm and gets measuring point; When the resilience that 10 on this beam is surveyed the district all survey run through after, survey from 10 and to extract 4 the district and survey the mensuration that the district carries out concrete carbonization depth according to a conventional method.When having batch detection to require, the beams of concrete that extracts total radical 30% pursues root and detects.As 10 of the lazy weights that extract by total radical 30%, should get and be no less than 10 and detect.Identical for strength grade of concrete, concrete raw material, match ratio, moulding process, curing condition and the length of time, essentially identical member can be used as same batch.
D, from 16 the resilience readings in every survey district, reject 3 maximum numbers and 3 minimum numbers, remaining 10 arithmetic means are surveyed the rebound value in district as this; As concrete carbonization depth≤8mm, each rebound value of surveying the district is not less than 32.5; The concrete strength of tested beam promptly can be considered the requirement of satisfying C60 (60MPa), if each rebound value of surveying the district is not less than 34.6, shows that then the concrete strength index of tested beam is relatively good; If each rebound value of surveying the district is not less than 35.7, show that then the concrete strength index of tested beam is fine.Above result coincide with the actual quality of measurand through cube and two kinds of crash test checkings of core boring sampling.
With reference to the method for embodiment 1, can detect the xoncrete structure or the member (Ru Liang, plate, post and wall etc.) of compressive strength at 50MPa～90MPa.
As long as each surveys the requirement that the rebound value of distinguishing satisfies table 1, the compressive strength that the then tested xoncrete structure or the intensity of member can meet the demands.
Table 1
Compressive strength (MPa) rebound value
90 ≥40.8
85 ≥39.6
80 ≥38.4
75 ≥37.1
70 ≥35.7
65 ≥34?2
60 ≥32.5
55 ≥30.8
50 ≥28.9。
Each surveys the requirement that the rebound value of distinguishing if can satisfy table 2, shows that then the intensity index of detected concrete structure or member is relatively good.
Table 2
Compressive strength (MPa) rebound value
90 ≥43.0
85 ≥41.8
80 ≥40.6
75 ≥39.2
70 ≥37.8
65 ≥36.3
60 ≥34.6
55 ≥32.9
50 ≥31.1。
Each surveys the requirement that the rebound value of distinguishing if can satisfy table 3, shows that then the detected concrete intensity index is fine.
Table 3
Compressive strength (MPa) rebound value
90 ≥44.0
85 ≥42.8
80 ≥41.6
75 ≥40.3
70 ≥38.9
65 ≥37.4
60 ≥35.7
55 ≥34.0
50 ≥32.1。
Result in table 1, table 2 and the table 3 all through cube and two kinds of crash test checkings of core boring sampling, coincide with the actual quality of measurand.
Claims (6)
1, the non-damaged compressive strength of pit sand concrete in high strength grade method that detects of reisilometer is characterized in that: undertaken by following step;
Determining of a, detected object: be used for the xoncrete structure or the member of construction project, its unit weight is at 2200～2800kg/m
3Between, intensity adopts the concrete of particle diameter in the preparation of the mountain of 0.08～8.0mm sand at 50MPa～90MPa;
Determining of b, testing tool: impact energy is 5.5 joules a reisilometer, 0～8mm concrete carbonization depth analyzer;
C, detection method: for single structure or member, get and be no less than 10 and survey the district, each is surveyed to survey in the district and reads 16 resilience readings; Measure on the structure or member finish in resilience, choose again and be no less than the mensuration that 30% survey district carries out concrete carbonization depth;
D, measured value are handled: reject 3 maximum numbers and 3 minimum numbers from survey 16 the resilience readings in district, the arithmetic mean of remaining 10 resilience readings is surveyed the rebound value in district for this; To the concrete of carbonation depth≤8mm, intensity is between 50～90MPa the time, and the rebound value of mensuration and concrete crushing strength should satisfy following requirement;
Compressive strength (MPa) rebound value
90 ≥40.8
85 ≥39.6
80 ≥38.4
75 ≥37.1
70 ≥35.7
65 ≥34.2
60 ≥32.5
55 ≥30.8
50 ≥28.9。
2, the non-damaged compressive strength of pit sand concrete in high strength grade method that detects of reisilometer according to claim 1, it is characterized in that: the rebound value and the rock sand concrete compressive strength in each survey district should satisfy following requirement in the steps d;
Compressive strength (MPa) rebound value
90 ≥43.0
85 ≥41.8
80 ≥40.6
75 ≥39.2
70 ≥37.8
65 ≥36.3
60 ≥34.6
55 ≥32.9
50 ≥31.1。
3, the non-damaged compressive strength of pit sand concrete in high strength grade method that detects of reisilometer according to claim 2, it is characterized in that: the rebound value and the rock sand concrete compressive strength in each survey district should satisfy following requirement in the steps d;
Compressive strength (MPa) rebound value
90 ≥44.0
85 ≥42.8
80 ≥41.6
75 ≥40.3
70 ≥38.9
65 ≥37.4
60 ≥35.7
55 ≥34.0
50 ≥32.1。
4, according to claim 1, the non-damaged compressive strength of pit sand concrete in high strength grade method that detects of 2 or 3 described reisilometers, it is characterized in that: the survey district among the step c should satisfy, and area is not less than 0.02m
2, adjacent two spacings of surveying the district are no more than 3m; 16 resilience readings that survey is read should satisfy, and each measuring point is evenly distributed on to be surveyed in the district, and the clear distance of adjacent two measuring points is not less than 30mm.
5, the non-damaged compressive strength of pit sand concrete in high strength grade method that detects of reisilometer according to claim 4, it is characterized in that: when having by the batch detection requirement among the step c, 30% and the institute structure of getting or the number of components that should get structure or member sum must not be less than 10 and detect.
6, the non-damaged compressive strength of pit sand concrete in high strength grade method that detects of reisilometer according to claim 5, it is characterized in that: the reisilometer among the step b is meant that the elastic hammer impingement length is that 100mm, elastic stem front end spherical radius are that 18.0mm, Rockwell's hardness are that its rate definite value is 83 ± 2 high-strength reisilometer on the riveting stake of HRC 60 ± 2.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389251A (en) * | 2013-07-16 | 2013-11-13 | 贵州中建建筑科研设计院有限公司 | A compression strength rebound detecting method for pumping mountain sand and concrete |
| CN104316422A (en) * | 2014-11-06 | 2015-01-28 | 常熟市苏常工程质量检测有限公司 | Detection method of concrete hardness |
| CN105372144A (en) * | 2015-12-01 | 2016-03-02 | 廊坊市阳光建设工程质量检测有限公司 | Method for overall calibration of rebound apparatus by using central-area value |
| CN107271280A (en) * | 2017-06-19 | 2017-10-20 | 山西省交通科学研究院 | A kind of impact echo resilience Comprehensive Assessment concrete crushing strength method |
| CN112147228A (en) * | 2020-09-28 | 2020-12-29 | 廊坊市阳光建设工程质量检测有限公司 | Method for establishing strength measurement curve for detecting concrete strength by using rebound ultrasonic angle measurement comprehensive method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2030719U (en) * | 1988-03-20 | 1989-01-11 | ***司令部工程勘察设计所 | Concrete compression strength measuring device |
| JPH11271286A (en) * | 1998-03-24 | 1999-10-05 | Fujita Corp | Estimating method for concrete strength |
| CN2449223Y (en) * | 2000-08-29 | 2001-09-19 | 王明堂 | Resilience instrument for non-destructive test concente C40-C80 surface hardness |
| CN2563568Y (en) * | 2002-07-18 | 2003-07-30 | 潘宗岭 | Data collector of resiliometer |
| KR20020087900A (en) * | 2002-09-12 | 2002-11-23 | 서 치 호 | The line hitting rebound test method for nondestructive test of concrete compressive strength |
-
2005
- 2005-05-17 CN CNB2005100030703A patent/CN100414283C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389251A (en) * | 2013-07-16 | 2013-11-13 | 贵州中建建筑科研设计院有限公司 | A compression strength rebound detecting method for pumping mountain sand and concrete |
| CN104316422A (en) * | 2014-11-06 | 2015-01-28 | 常熟市苏常工程质量检测有限公司 | Detection method of concrete hardness |
| CN105372144A (en) * | 2015-12-01 | 2016-03-02 | 廊坊市阳光建设工程质量检测有限公司 | Method for overall calibration of rebound apparatus by using central-area value |
| CN105372144B (en) * | 2015-12-01 | 2018-02-27 | 廊坊市阳光建设工程质量检测有限公司 | A kind of method that zones values in carry out overall calibration to reisilometer |
| CN107271280A (en) * | 2017-06-19 | 2017-10-20 | 山西省交通科学研究院 | A kind of impact echo resilience Comprehensive Assessment concrete crushing strength method |
| CN112147228A (en) * | 2020-09-28 | 2020-12-29 | 廊坊市阳光建设工程质量检测有限公司 | Method for establishing strength measurement curve for detecting concrete strength by using rebound ultrasonic angle measurement comprehensive method |
| CN112147228B (en) * | 2020-09-28 | 2023-03-10 | 廊坊市阳光建设工程质量检测有限公司 | Method for establishing strength measurement curve for detecting concrete strength by using rebound ultrasonic angle measurement comprehensive method |
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| CN100414283C (en) | 2008-08-27 |
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