CN104964874A - Pit sand concrete compressive strength detection method and apparatus thereof - Google Patents
Pit sand concrete compressive strength detection method and apparatus thereof Download PDFInfo
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- CN104964874A CN104964874A CN201510271517.9A CN201510271517A CN104964874A CN 104964874 A CN104964874 A CN 104964874A CN 201510271517 A CN201510271517 A CN 201510271517A CN 104964874 A CN104964874 A CN 104964874A
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Abstract
The invention relates to the field of civil and architectural engineering, and discloses a pit sand concrete compressive strength detection method and an apparatus thereof. The method comprises the following steps: selecting at least three detection zones, and drilling a core sample with the diameter of 70mm on the structural concrete of each of the detection zones; cutting, rubbing, and carrying out compressive strength test by using a universal material testing machine to obtain the average compressive strength fcor.j of the core samples in the detection zones; and calculating the concrete standard compressive strength equivalent value fcu.j by using a correction coefficient formula. The method and the apparatus enhance the detection adaptability of the compressive strength and improve the detection precision.
Description
Technical field
The present invention relates to civil construction project field, particularly relate to a kind of rock sand concrete detection method of compression strength and device.
Background technology
Concrete strength is the basic foundation of evaluation construction engineering quality.Under normal circumstances, xoncrete structure should by reinforced concrete construction and acceptance specification " requirement, make evaluation and examination that cube standard maintaining test block carries out concrete strength, but when running into some special circumstances (time with suspicion to the test result of test block pressure resistance intensity, because of material, construction or maintenance bad and there is concrete quality problem time, concrete suffers freeze injury, fire, when when chemical erosion or other infringements, needs detect concrete strength in the building structure or buildings used for many years), directly will carry out quality testing and evaluation to component itself, wherein a kind of half lossless detection method---core drilling method (drill through concrete core sample and detect its intensity) is generally considered a kind of directly perceived, method that is reliable and that accurately the intensity of concrete component is evaluated.
In prior art, " factor about core-drilling test concrete strength technical regulation " defines the method adopting core strength of structural concrete intensity, and its main points think that diameter is that the compression strength value of 70 ~ 75mm core test specimen is suitable with concrete cube test specimen compression strength value.But a large amount of detection practices shows, when using factor about core-drilling test concrete strength, the compression strength value of core test specimen and value of concrete strength are along with the change of starting material, maintenance process, the length of time, label, dry and wet state, all likely change, that is, have region with factor about core-drilling test concrete strength, the method applicability of prior art is not strong, lack specific aim, error is large.
Summary of the invention
The invention provides a kind of rock sand concrete detection method of compression strength and device, the method applicability solving prior art in prior art is strong, lack specific aim, technical matters that error is large.
The object of the invention is to be achieved through the following technical solutions:
A kind of rock sand concrete detection method of compression strength, comprising:
Select at least three Chu Ce districts, and on the structural concrete entity in described survey district, drill through the core of diameter 70mm;
By cutting, polish, then carry out compressive strength test with universal testing machine, draw and survey core mean compressive strength value fcor.j in district;
Correction factors formula is utilized to calculate concrete standard compressive strength scaled value fcu.j.
A kind of rock sand concrete detecting device for pressure strength, comprising:
Sampling module, for selecting at least three Chu Ce districts, and drills through the core of diameter 70mm on the structural concrete entity in described survey district;
First computing module, for by cutting, polishing, then carries out compressive strength test with universal testing machine, draws and surveys core mean compressive strength value fcor.j in district;
Second computing module, calculates concrete standard compressive strength scaled value fcu.j for utilizing correction factors formula.
By a kind of rock sand concrete detection method of compression strength provided by the invention and device, by selecting at least three Chu Ce districts, and on the structural concrete entity in described survey district, drill through the core of diameter 70mm; By cutting, polish, then carry out compressive strength test with universal testing machine, draw and survey core mean compressive strength value fcor.j in district; Correction factors formula is utilized to calculate concrete standard compressive strength scaled value fcu.j.Make the detection adaptability of compressive strength stronger, and improve accuracy of detection.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, also can obtain other accompanying drawing according to these accompanying drawings.
The process flow diagram of a kind of rock sand concrete detection method of compression strength that Fig. 1 provides for the embodiment of the present invention;
The structural drawing of a kind of rock sand concrete detecting device for pressure strength that Fig. 2 provides for the embodiment of the present invention.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, and below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
If Fig. 1 is for providing a kind of rock sand concrete detection method of compression strength in the embodiment of the present invention, comprising:
Step 101, selection at least three Chu Ce districts, and on the structural concrete entity in described survey district, drill through the core of diameter 70mm;
Step 102, by cutting, to polish, then carry out compressive strength test with universal testing machine, draw and survey core mean compressive strength value fcor.j in district;
Step 103, correction factors formula is utilized to calculate concrete standard compressive strength scaled value fcu.j.
Wherein, step 103 specifically can comprise: according to core mean compressive strength value fcor.j in survey district, utilize correction factors formula to deduce structure and mix concrete standard compressive strength scaled value fcu.j, wherein, correction factors formula is fcu.j=Afcor.j+B, A span 0.75-1.60, B span is 0-10.37.
Core boring sampling adopts adamas or the artificiaal diamond thin wall drill bit of internal diameter 70mm.
In step 102, core is cut, polished, the core ratio of height to diameter be processed into is 1: 1.
Before step 101, can comprise:
Utilize the reinforcing bar in the structural concrete in detection instrument detection survey district;
According to the reinforcement location detected, drill bit is avoided described reinforcing bar, with core boring sampling.
By this step, make drill bit clog-freely can go deep into structural concrete internal extraction core, make testing result more accurately credible.
By a kind of rock sand concrete detection method of compression strength provided by the invention, by selecting at least three Chu Ce districts, and on the structural concrete entity in described survey district, drill through the core of diameter 70mm; By cutting, polish, then carry out compressive strength test with universal testing machine, draw and survey core mean compressive strength value fcor.j in district; Correction factors formula is utilized to calculate concrete standard compressive strength scaled value fcu.j.Make the detection adaptability of compressive strength stronger, and improve accuracy of detection.In addition, because 70mm core diameter is less, compared with large core core drilling method, greatly reduce the repairing because detection damage structure or component cause, reinforcing expense.70mm core utilizes pre-determined correction factors formula to be converted into concrete standard compression strength value, unites with concrete works design strength and delivery receiving acceptance intensity, is namely all corresponding cube standard compressive strength, thus has good comparability.
The embodiment of the present invention additionally provides a kind of rock sand concrete detecting device for pressure strength, as shown in Figure 2, comprising:
Sampling module 210, for selecting at least three Chu Ce districts, and drills through the core of diameter 70mm on the structural concrete entity in described survey district;
First computing module 220, for by cutting, polishing, then carries out compressive strength test with universal testing machine, draws and surveys core mean compressive strength value fcor.j in district;
Second computing module 230, calculates concrete standard compressive strength scaled value fcu.j for utilizing correction factors formula.
Wherein, second computing module 230 specifically for according to survey district in core mean compressive strength value fcor.j, utilize correction factors formula to deduce structure and mix concrete standard compressive strength scaled value fcu.j, wherein, correction factors formula is fcu.j=Afcor.j+B, A span 0.75-1.60, B span is 0-10.37.
Native system can also comprise:
Detection module 240, before drilling through the core of diameter 70mm, utilizes the reinforcing bar in the structural concrete in detection instrument detection survey district on the structural concrete entity in described survey district;
Execution module 250, for according to the reinforcement location detected, avoids described reinforcing bar by drill bit, with core boring sampling.
Above to invention has been detailed introduction, applying specific case herein and setting forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (8)
1. a rock sand concrete detection method of compression strength, is characterized in that, comprising:
Select at least three Chu Ce districts, and on the structural concrete entity in described survey district, drill through the core of diameter 70mm;
By cutting, polish, then carry out compressive strength test with universal testing machine, draw and survey core mean compressive strength value fcor.j in district;
Correction factors formula is utilized to calculate concrete standard compressive strength scaled value fcu.j.
2. rock sand concrete detection method of compression strength according to claim 1, is characterized in that, the described correction factors formula that utilizes deduces structural concrete strength, comprising:
According to core mean compressive strength value fcor.j in survey district, utilize correction factors formula to deduce structure and mix concrete standard compressive strength scaled value fcu.j, wherein, correction factors formula is fcu.j=Afcor.j+B, A span 0.75-1.60, B span is 0-10.37.
3. rock sand concrete detection method of compression strength according to claim 1, is characterized in that, core boring sampling adopts adamas or the artificiaal diamond thin wall drill bit of internal diameter 70mm.
4. rock sand concrete detection method of compression strength according to claim 1, is characterized in that, core is cut, polished, and the core ratio of height to diameter be processed into is 1: 1.
5. rock sand concrete detection method of compression strength according to claim 1, is characterized in that, described on the structural concrete entity in described survey district, drill through the core of diameter 70mm before, comprising:
Utilize the reinforcing bar in the structural concrete in detection instrument detection survey district;
According to the reinforcement location detected, drill bit is avoided described reinforcing bar, with core boring sampling.
6. a rock sand concrete detecting device for pressure strength, is characterized in that, comprising:
Sampling module, for selecting at least three Chu Ce districts, and drills through the core of diameter 70mm on the structural concrete entity in described survey district;
First computing module, for by cutting, polishing, then carries out compressive strength test with universal testing machine, draws and surveys core mean compressive strength value fcor.j in district;
Second computing module, calculates concrete standard compressive strength scaled value fcu.j for utilizing correction factors formula.
7. rock sand concrete detecting device for pressure strength according to claim 6, second computing module specifically for according to survey district in core mean compressive strength value fCor.j, utilize correction factors formula to deduce structure and mix concrete standard compressive strength scaled value fcu.j, wherein, correction factors formula is fcu.j=Afcor.j+B, A span 0.75-1.60, B span is 0-10.37.
8. rock sand concrete detecting device for pressure strength according to claim 6, is characterized in that, also comprise:
Detection module, before drilling through the core of diameter 70mm, utilizes the reinforcing bar in the structural concrete in detection instrument detection survey district on the structural concrete entity in described survey district;
Execution module, for according to the reinforcement location detected, avoids described reinforcing bar by drill bit, with core boring sampling.
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| CN106248714A (en) * | 2016-07-25 | 2016-12-21 | 太原理工大学 | A kind of infrared detection method for concrete high-temperature damage |
| CN108627397A (en) * | 2018-05-11 | 2018-10-09 | 建研科技股份有限公司 | Structural performance inspection method for large prefabricated reinforced concrete column member |
| CN110567808A (en) * | 2019-09-11 | 2019-12-13 | 上海市市政规划设计研究院有限公司 | Method for evaluating tensile strength and flexural strength of ultrahigh-performance concrete |
| CN110726585A (en) * | 2019-11-26 | 2020-01-24 | 上海市建筑科学研究院有限公司 | On-site micro-loss sampling detection method for block strength of masonry structure |
| CN111077065A (en) * | 2019-12-30 | 2020-04-28 | 广东交科检测有限公司 | Method for measuring damaged depth of concrete after high temperature through grouped compression resistance of core samples |
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| CN106248714A (en) * | 2016-07-25 | 2016-12-21 | 太原理工大学 | A kind of infrared detection method for concrete high-temperature damage |
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| CN110567808B (en) * | 2019-09-11 | 2022-01-28 | 上海市市政规划设计研究院有限公司 | Method for evaluating tensile strength and flexural strength of ultrahigh-performance concrete |
| CN110726585A (en) * | 2019-11-26 | 2020-01-24 | 上海市建筑科学研究院有限公司 | On-site micro-loss sampling detection method for block strength of masonry structure |
| CN111077065A (en) * | 2019-12-30 | 2020-04-28 | 广东交科检测有限公司 | Method for measuring damaged depth of concrete after high temperature through grouped compression resistance of core samples |
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Application publication date: 20151007 |