CN103389251A - A compression strength rebound detecting method for pumping mountain sand and concrete - Google Patents
A compression strength rebound detecting method for pumping mountain sand and concrete Download PDFInfo
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- CN103389251A CN103389251A CN2013103075202A CN201310307520A CN103389251A CN 103389251 A CN103389251 A CN 103389251A CN 2013103075202 A CN2013103075202 A CN 2013103075202A CN 201310307520 A CN201310307520 A CN 201310307520A CN 103389251 A CN103389251 A CN 103389251A
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Abstract
The invention provides a compression strength rebound detecting method for pumping mountain sand and concrete. The detecting method is a pumping mountain sand and concrete rebound detecting method established, for the first time, based on tests and regression analyses on concrete members that are manufactured by common building engineering materials and moulding technologies in Guizhou province. The rebound method is suitable for common silicate cement and mixing water which meet the national standards, mountain sand and weather conditions which meet the Guizhou local standards "Mountain sand and concrete technical procedures", adoption of a common moulding technology, adoption of break stones having a maximum particle size not more than 40 mm, natural curing and natural dried surfaces, an age period of 14d-730 d and concrete strength of 10-60 MPa. The detecting method comprises steps of on-site detecting zone selection, carbonation depth measurement and compression strength calculation of concrete to be detected.
Description
Technical field
The present invention relates to construction work concrete crushing strength detection field, relate in particular to a kind of pumping rock sand concrete compressive strength resilience detection method.
Background technology
Rebound method detect rock sand concrete compressive strength in Guizhou successful Application for many years, although obtain the favorable comment of social each side, the strong curve of the survey of this standard is with normal concrete (100～500kg/cm in last century
2) be setting up of object, and use in a large number premixings, pumping, high slump concretes in engineering now, its strength grade is many between C10～C60, extensively mix the additives such as coal powder, breeze, water reducer in composition material, therefore the strong curve of former survey is not suitable with the needs of this province engineering construction development gradually, and this type of construction timber with self uniqueness should be formulated adaptability local special-purpose strong curve of surveying preferably according to its singularity to the pumping rock sand concrete.
Summary of the invention
In order to evade the inapplicable problem of original technical manual, the present invention carries out experimental study by the concrete component that Guizhou Ben Sheng material commonly used, moulding process are made, proposition can meet the needs of this province construction work construction development, further guarantees a kind of pumping rock sand concrete compressive strength resilience detection method of accuracy of detection.
The present invention is that to solve the problems of the technologies described above the technical scheme that adopts as follows: the first step, the on-the-spot district that surveys is selected: member can survey face on select to be no less than 16 and survey district, 16 resilience readings are read in every survey district, survey two symmetries that district should be evenly distributed on member can survey face on, also can be selected in one can survey face on, should arrange and survey district in member significant points (as: maximum weighted and weak part):
Preferably, survey area is preferably 0.02～0.04m in surveying district's selection
2, and adjacent two spacings of surveying district should be controlled in 2m, survey district and should be controlled at 0.2～0.5m from the distance at component ends or construction joint edge.
Second step, carbonation depth value are measured: select the member of surveying to be no less than 30% survey district and carry out the measurement of carbonation depth value, the developer that uses during test is 1% phenolphthalein alcoholic solution.
Preferably, selected measurement aperture is preferably 15mm when the carbonation depth value is measured, and can accurately measure to 0.25mm.
In the 3rd step, institute's concrete crushing strength value of surveying is calculated: at first, calculate and survey the average rebound value in district, from this, survey 3 maximal values of rejecting and 3 minimum value 16 rebound values distinguishing, then 10 rebound values of remainder are calculated as follows:
R in formula
mFor surveying the average rebound value in district, R
iIt is the rebound value of i measuring point; Secondly, calculate the average carbonation depth value of same concrete members:
D in formula
mFor surveying the average carbonation depth in district, d
iBe the carbonation depth of i measuring point, n is the measuring point sum; Again, calculate concrete compressive strength:
In formula
Be i the compressive strength of surveying district, R
M, iBe i and survey the average rebound value in district, d
mFor surveying the average carbonation depth in district.
The invention has the advantages that: be experiment and the regression analysis that carries out on the concrete component that this province construction work common used material, moulding process are made due to the present invention, the pumping rock sand concrete resilience detection method of setting up first, therefore the rock sand concrete of Guizhou province had certain specific aim, can be widely used in the concrete crushing strength measurement and calculation in the Guizhou province construction work.
Embodiment
The present invention is described in detail below in conjunction with specific embodiment.Following examples will help those skilled in the art further to understand the present invention, but not limit in any form the present invention.Should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, can also make some and improve.These all belong to protection scope of the present invention.
Embodiment: the first step, the on-the-spot district that surveys is selected: member can survey face on select to be no less than 16 and survey district, 16 resilience readings are read in every survey district, survey two symmetries that district should be evenly distributed on member can survey face on, also can be selected in one can survey face on, should arrange and survey district in member significant points (as: maximum weighted and weak part); Survey district and should be chosen in and can make reisilometer be in horizontal direction to detect the concreting side, if when can not meet this and should require, can be chosen in non-horizontal direction and detect concreting side, surface or bottom surface.In selection, survey area is preferably 0.02～0.04m
2, be defined as 0.03m in the present embodiment
2, and adjacent two spacings of surveying district should be controlled in 2m, are decided to be 2m in the present embodiment, survey district and should be controlled at 0.2～0.5m from the distance at component ends or construction joint edge, are decided to be 0.4m in the present embodiment.
Second step, carbonation depth value are measured: select the member of surveying to be no less than on 30% survey district and representative position and carry out the measurement of carbonation depth value, the developer that uses during test is 1% phenolphthalein alcoholic solution.Selected measurement aperture is preferably 15mm when the carbonation depth value is measured, and can accurately measure to 0.25mm; During less than 6.0mm, be accurate to 0.25mm when the carbonation depth value; Get the carbonation depth value of 6.0mm as this survey district or this member during greater than 6.0mm when the carbonation depth value.
In the 3rd step, institute's concrete crushing strength value of surveying is calculated: at first, calculate and survey the average rebound value in district, from this, survey 3 maximal values of rejecting and 3 minimum value 16 rebound values distinguishing, then 10 rebound values of remainder are calculated as follows:
R in formula
mFor surveying the average rebound value in district, R
iIt is the rebound value of i measuring point; Secondly, calculate the average carbonation depth value of same concrete members:
D in formula
mFor surveying the average carbonation depth in district, d
iBe the carbonation depth of i measuring point, n is the measuring point sum; Again, calculate concrete compressive strength:
In formula
Be i the compressive strength of surveying district, R
M, iBe i and survey the average rebound value in district, d
mFor surveying the average carbonation depth in district.
Claims (3)
1. a pumping rock sand concrete compressive strength resilience detection method, is characterized in that comprising the steps:
The first step, the on-the-spot district that surveys is selected: member can survey face on select to be no less than 16 and survey district, 16 resilience readings are read in every survey district, survey two symmetries that district should be evenly distributed on member can survey face on, also can be selected in one can survey face on, should arrange and survey district in member significant points (as: maximum weighted and weak part);
Second step, carbonation depth value are measured: select the member of surveying to be no less than 30% survey district and carry out the measurement of carbonation depth value, the developer that uses during test is 1% phenolphthalein alcoholic solution;
In the 3rd step, institute's concrete crushing strength value of surveying is calculated: at first, calculate and survey the average rebound value in district, from this, survey 3 maximal values of rejecting and 3 minimum value 16 rebound values distinguishing, then 10 rebound values of remainder are calculated as follows:
R in formula
mFor surveying the average rebound value in district, R
iIt is the rebound value of i measuring point; Secondly, calculate the average carbonation depth value of same concrete members:
D in formula
mFor surveying the average carbonation depth in district, d
iBe the carbonation depth of i measuring point, n is the measuring point sum; Again, calculate concrete compressive strength:
In formula
Be i the compressive strength of surveying district, R
M, iBe i and survey the average rebound value in district, d
mFor surveying the average carbonation depth in district.
2. a kind of pumping rock sand concrete compressive strength resilience detection method as claimed in claim 1 is characterized in that: survey area is preferably 0.02～0.04m in the first pacing district is selected
2, and adjacent two spacings of surveying district should be controlled in 2m, survey district and should be controlled at 0.2～0.5m from the distance at component ends or construction joint edge.
3. a kind of pumping rock sand concrete compressive strength resilience detection method as claimed in claim 1, it is characterized in that: selected measurement aperture is 15mm when second step carbonation depth value is measured, and can accurately measure to 0.25mm.
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| CN2013103075202A CN103389251A (en) | 2013-07-16 | 2013-07-16 | A compression strength rebound detecting method for pumping mountain sand and concrete |
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| CN2013103075202A CN103389251A (en) | 2013-07-16 | 2013-07-16 | A compression strength rebound detecting method for pumping mountain sand and concrete |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108776078A (en) * | 2018-06-13 | 2018-11-09 | 上海建为历保科技股份有限公司 | The method that the accuracy rate of reisilometer wood component density prediction is improved using resistance dynamometer |
| CN110763583A (en) * | 2019-10-22 | 2020-02-07 | 浙江二十冶建设有限公司 | Concrete strength detection method |
| CN111829869A (en) * | 2020-06-30 | 2020-10-27 | 元测检测技术（江苏）股份有限公司 | Special strength measuring curve for detecting concrete compressive strength by resilience 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 |
| CN112213217A (en) * | 2020-10-22 | 2021-01-12 | 廊坊市阳光建设工程质量检测有限公司 | Method for establishing compression strength curve of concrete detected by rebound method |
| CN113959825A (en) * | 2021-10-28 | 2022-01-21 | 长安大学 | Concrete beam carbonization depth calculation method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1696649A (en) * | 2005-05-17 | 2005-11-16 | 贵州中建建筑科研设计院 | Method for testing compressive strength of pit sand concrete in high strength grade through rebound tester without damage |
| JP2009002721A (en) * | 2007-06-20 | 2009-01-08 | Ohmoto Gumi Co Ltd | Method for determining time of demolding concrete |
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2013
- 2013-07-16 CN CN2013103075202A patent/CN103389251A/en active Pending
Patent Citations (2)
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| CN1696649A (en) * | 2005-05-17 | 2005-11-16 | 贵州中建建筑科研设计院 | Method for testing compressive strength of pit sand concrete in high strength grade through rebound tester without damage |
| JP2009002721A (en) * | 2007-06-20 | 2009-01-08 | Ohmoto Gumi Co Ltd | Method for determining time of demolding concrete |
Non-Patent Citations (1)
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| 贵州中建建筑科研设计院: "《回弹法检测山砂混凝土抗压强度技术规范》", 1 March 1996 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108776078A (en) * | 2018-06-13 | 2018-11-09 | 上海建为历保科技股份有限公司 | The method that the accuracy rate of reisilometer wood component density prediction is improved using resistance dynamometer |
| CN110763583A (en) * | 2019-10-22 | 2020-02-07 | 浙江二十冶建设有限公司 | Concrete strength detection method |
| CN111829869A (en) * | 2020-06-30 | 2020-10-27 | 元测检测技术（江苏）股份有限公司 | Special strength measuring curve for detecting concrete compressive strength by resilience 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 |
| CN112213217A (en) * | 2020-10-22 | 2021-01-12 | 廊坊市阳光建设工程质量检测有限公司 | Method for establishing compression strength curve of concrete detected by rebound method |
| CN113959825A (en) * | 2021-10-28 | 2022-01-21 | 长安大学 | Concrete beam carbonization depth calculation method |
| CN113959825B (en) * | 2021-10-28 | 2024-04-19 | 长安大学 | Calculation method for carbonization depth of concrete beam |
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