CN103454159A - Torque-type detector for concrete compression strength and detection method thereof - Google Patents
Torque-type detector for concrete compression strength and detection method thereof Download PDFInfo
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- CN103454159A CN103454159A CN2013103705423A CN201310370542A CN103454159A CN 103454159 A CN103454159 A CN 103454159A CN 2013103705423 A CN2013103705423 A CN 2013103705423A CN 201310370542 A CN201310370542 A CN 201310370542A CN 103454159 A CN103454159 A CN 103454159A
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Abstract
The invention relates to the technical field of concrete compression strength, and discloses a torque-type detection method thereof. The method comprises the steps of: 1) drilling ring slots in a concrete member so as to form concrete specimens to be detected; 2) sleeving a torque-type detector on each concrete specimen and applying torque forces until the concrete specimens are twisted off; 3) obtaining a peak value of the torque forces; 4) obtaining the compression strength of the concrete specimens according to a corresponding conversion formula; 5) obtaining an average value of the compression strength of multiple concrete specimens by detecting the compression strength of multiple different concrete specimens so as to obtain the compression strength of the concrete member. According to the corresponding relationship between the concrete compression strength and the torque force, the concrete specimens are formed in the concrete member in a drilling manner and detected in a torque-acting manner by using the torque-type detector; the concrete compression strength is speculated through the conversion formula, and the damaged surface is small. In addition, the detection method is simple, convenient and rapid to operate, high in detection precision and wide in application range.
Description
Technical field
The present invention relates to the technical field of concrete crushing strength, relate in particular to calibrated wrench method detector and the detection method thereof of concrete crushing strength.
Background technology
Compressive strength is the performance parameter of concrete outbalance, is directly connected to the total quality safety of concrete component and even engineering construction.Needs for concrete component in different engineering constructions, concrete need to meet corresponding compressive strength, therefore, to the detection of concrete crushing strength, is a very important job.
In prior art, for detection of the method for concrete crushing strength, have multiple, as follows respectively:
1), cut platen press; It applies the pressure perpendicular to pressure-bearing surface according to shearing press instrument to the right-angle side of concrete component, makes the right-angle side of concrete component produce local shear compression failure, and infers the compressive strength of concrete component according to shearing pressure now; The defect that the method exists: directly adopt concrete component to be detected, concrete component is caused to certain damage, due to what detect, be the compressive strength on the surface of concrete component, like this, be subject to the condition restriction such as thickness of concrete component shape, detection position, compressive strength scope and concrete component, make the situation of shearing pressure comparatively complicated, be difficult to reach accurate detection;
2), core drilling method; Drill through concrete sample on concrete component, and be processed into the standard core, carry out its compressive strength detection on pressure testing machine; The defect of this detection method: concrete component is caused to larger damage, and, in testing process, influenced many factors, be difficult to reach accurate detection;
3), rebound method; According to the lip-deep hardness of concrete component and the relation of intensity, infer the compressive strength of concrete component; Although the method does not cause damage to concrete component,, by the relation of skin hardness and intensity, the precision of the compressive strength of deriving is lower, is difficult to reflect exactly concrete crushing strength;
4), Ultrasonic Resilience Comprehensive Method in Construction; The method, according to the hardness of surface of concrete structure and the ultrasonic velocity in concrete component, is inferred concrete crushing strength; Although the method does not cause damage to concrete component, the lossless detection method that precision is more single wants high.But the test operation flow process is comparatively loaded down with trivial details, and the on-the-spot test condition is had to more restriction and requirement, suffered tests affect factor is also relatively many, easily produces multiple measurement error, also directly affects accuracy of detection;
5), rear anchoring method; In the scope of the method according to concrete component top layer 30mm, rear anchoring method is destroyed the dial-out power of concrete component and is inferred concrete crushing strength; The defect that the method exists: concrete component is caused to certain damage, and, in testing process, influence factor is more, the stress complexity, cause being difficult to reach accurate detection.
In sum, in the above-mentioned method for detection of concrete crushing strength, exist to concrete component is caused damage and detects inaccurate problem.
In prior art, also have the shearing press instrument for detection of concrete crushing strength, utilization is cut platen press and is detected concrete compressive strength.Its right-angle side to concrete component applies the pressure perpendicular to pressure-bearing surface, makes the right-angle side of concrete component produce local shear compression failure, and carrys out the detection method of establish concrete strength according to shearing pressure, and this is cut platen press and has following defect:
1), be only applicable to the detection of compressive strength that cross section has right-angle side, can apply the concrete component of shearing pressure;
2), just for the surface strength of concrete component, therefore require concrete surface layer and internal soundness no significant difference or inside not to have defect;
3), the location place must vertically be evenly arranged along concrete component, the location that adjacent two locations should be arranged on the not ipsilateral of member should not be less than 0.2m from the member termination, the distance between two adjacent locations should not be less than 0.3m;
4), the location place of concrete component should be smooth, open defects such as free from flaw, loose, hole, honeycomb, and must not be arranged in the end face of concrete component formation;
5), the angle of the location place adjacent surface of concrete component should be between 88 °～92 °, when not meeting this and require, grinding process slightly;
6), must be no less than 14d the length of time of concrete component;
7), the compressive strength scope of concrete component is limited in 10MPa～60MPa;
8), the thickness of concrete component must be not less than 80mm.
In sum, cut the restriction condition that platen press is subject to more, therefore, when affect its accuracy of detection, also affected its scope of application, must apply and cause restriction the detection of concrete strength.
Summary of the invention
The object of the present invention is to provide the detection method of concrete crushing strength, be intended to solve the various detection methods of concrete crushing strength in prior art and have the problem that accuracy of detection is low and the scope of application is little.
The present invention is achieved in that the calibrated wrench method detection method of concrete crushing strength, comprises the following steps:
1) concrete that, on concrete component or concrete structural solid, drill annular groove, described annular groove surrounds forms concrete sample to be detected;
2), the calibrated wrench method detector is sheathed on described concrete sample, and apply torsion, until described concrete sample is twisted off;
3), when the moment that described concrete sample is twisted off, obtain the torsion peak value that described calibrated wrench method detector applies;
4), by the conversion formula of described torsion peak value substitution torsion and compressive strength, obtain the compressive strength of described concrete sample;
5), in the diverse location difference repetitive operation above-mentioned steps 1 of described concrete sample)～step 4), record the compressive strength of a plurality of different concrete samples, and then ask for the mean value of the compressive strength of a plurality of concrete samples, thereby obtain concrete compressive strength.
The present invention also provides the calibrated wrench method detector of concrete crushing strength, compressive strength for detection of concrete component or concrete structural solid, be formed with annular groove on described concrete component or concrete structural solid, the concrete that described annular groove surrounds forms concrete sample to be detected, described torque tester comprises pedestal, have front opening in described holder and be sheathed on the jaws of described concrete sample, described torque tube is perpendicular to described jaws.
Compared with prior art, in the calibrated wrench method detection method of above-mentioned concrete crushing strength, according to the corresponding relation of setting up between concrete crushing strength and torsion, drill concrete sample on concrete component or concrete structural solid, adopt the calibrated wrench method detector to carry out the calibrated wrench method detection to concrete sample, the conversion formula of setting up in advance by torsion and concrete sample is inferred concrete compressive strength, the concrete sample size that this calibrated wrench method detection method drills is little, to the detected concrete member or concrete structural solid to destroy face little, detection method is simple, convenient to operation, accuracy of detection is high, applied widely, more existing cube specimen compressive strength commonly used detects more directly perceived and operability, and better authenticity and representativeness, and more economy, environmental protection, be applicable to Site Detection, and intuitive is strong, representativeness is good, reliability is high.
The accompanying drawing explanation
Fig. 1 is that the in running order master of calibrated wrench method detector of the concrete crushing strength that provides of the embodiment of the present invention one looks schematic diagram;
Fig. 2 is that the master of the holder that provides of the embodiment of the present invention one looks schematic diagram;
Fig. 3 is that the in running order master of calibrated wrench method detector of the concrete crushing strength that provides of the embodiment of the present invention two looks schematic diagram.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Below in conjunction with specific embodiment, realization of the present invention is described in detail.
Embodiment mono-
As shown in Fig. 1～2, it is a preferred embodiment provided by the invention.
The detection method that the present embodiment provides, for detection of concrete crushing strength, its concrete operation step is as follows:
1), utilize hollow diamond, drill annular groove 21 on the concrete component of compressive strength to be detected or concrete structural solid 2, this annular groove 21 runs through the outside surface of concrete component or concrete structural solid 2, and the concrete that annular groove 21 surrounds is formed for the concrete sample 22 detected; , also can utilize miscellaneous equipment to be drilled concrete component or concrete structural solid 2 herein, be not limited to hollow diamond, can as long as can on concrete component or concrete structural solid 2, form 22 of the concrete samples of annular groove 21 encirclements;
2), calibrated wrench method detector 1 is provided, it is set in outside concrete sample 22, apply again torsion after clamping concrete sample 22, increase torsion gradually until concrete sample 22 is twisted off;
3), when the moment that concrete sample 22 is twisted off, now, the torsion maximum that calibrated wrench method detector 1 applies, thereby can obtain the torsion peak value that calibrated wrench method detector 1 applies;
4), according to the torsion peak value substitution torsion that obtains and the conversion formula of compressive strength, obtain the compressive strength of concrete sample 22, conversion formula herein can have multiple, is not limited to certain special formula;
5), the diverse location on concrete component or concrete structural solid 2 operates respectively above-mentioned steps 1)～4) operation, obtain a plurality of compressive strength of concrete component or concrete structural solid 2, thereby ask for the mean value of a plurality of compressive strength, obtain concrete compressive strength.
In the calibrated wrench method detection method of above-mentioned concrete crushing strength, it is according to the corresponding relation of setting up between concrete crushing strength and torsion, drill concrete sample 22 on concrete component or concrete structural solid 2, adopt 1 pair of concrete sample of calibrated wrench method detector 22 to carry out the calibrated wrench method detection, the conversion formula of setting up in advance by torsion and concrete sample 22 is inferred concrete compressive strength, the specimen size that this calibrated wrench method detection method drills is little, destruction face to detected concrete member or concrete structural solid 2 is little, detection method is simple, convenient to operation, accuracy of detection is high, it also has following beneficial effect:
1), in testing process, concrete sample 22 is stressed simple, its stress is only torsion, and the destruction face of concrete sample 22 is consistent with the torsion direction, therefore, its affected factor is less, accuracy of detection is high;
2), this detection method is not particularly limited the shape of concrete component to be detected or concrete structural solid 2, the test position is unrestricted, the surface of on-the-spot test position is without processing, the concrete sample 22 drilled does not need to process;
3), the specimen size that drills is little, little to the destruction face of detected concrete member or concrete structural solid 2, is applicable to detecting concrete component or the concrete structural solid 2 of Reinforcing Bar with Dense Disposition;
4), for the internal intensity of concrete component or concrete structural solid 2, detect concrete compressive strength, its accuracy of detection is higher;
5), to detect length of time scope wide, every calibrated wrench method test samples that can drill moulding, can adopt the calibrated wrench method detection method to detect, the earliest can be to 1d, can be the stretch-draw of prestressed concrete and put and the construction in concrete length of time morning provides technical guarantee;
6), be applicable to the detection of the concrete compressive strength of Structural Engineering of C10-C100;
7), the calibrated wrench method detector 1 that adopts is light, be easy to carry, simple to operate, accurate quick, cost be low.
To sum up, the calibrated wrench method detection method of utilizing the present embodiment to provide detects the compressive strength of coagulation, and it is little that it has the specimen size drilled, to concrete component or concrete structural solid 2 damages are little, accuracy of detection is high and the advantage such as applied widely.
In the present embodiment, conversion formula is as follows:
Wherein:
the compressive strength scaled value (MPa) of i concrete component or concrete structural solid 2 when the calibrated wrench method detector that is employing detects; f
nj, ithe calibrated wrench method detector that is employing puts on i concrete component or concrete structural solid 2 concrete torsion peak values (kN) while detecting; A, b are the regression coefficient of regression equation.
Certainly, except above-mentioned formula, the conversion formula of torsion and compressive strength can also be other formula, is not limited to above-mentioned formula.
In above-mentioned calibrated wrench method detection method, calibrated wrench method detector 1 comprises holder 12, the jaws that there is front opening in holder 12, and holder 12 is connected with torque tube 11, in step 2) in, jaws is inserted in the annular groove 21 of concrete component or concrete structural solid 2, holder 12 is set in annular groove 21, make the inwall of jaws be connected to the outer wall of concrete sample 22, and contraction jaws, make jaws and the firm butt of concrete sample 22, now, make torque tube 11 and jaws in plumbness, and driving torque bar 11, making jaws clamp concrete sample 22 rotates, until concrete sample 22 is twisted off.
In the process of above-mentioned driving torque bar 11, keep torque tube 11 and jaws in plumbness constantly.Like this, utilize the cooperation of torque tube 11 and holder 12, the cross section that makes concrete sample 22 be twisted off and torsion, in same direction, are simplified the suffered stress situation of concrete sample 22, greatly improve the accuracy of detection of this calibrated wrench method detection method.
In the present embodiment, can directly by outside equipment, calculate conversion formula, obtain concrete compressive strength, certainly, also can obtain by automatic method, specific as follows:
Be provided with control element in torque tube 11, this control element can detect the torsion that 11 pairs of concrete samples 22 of torque tube apply, and be embedded with above-mentioned conversion formula, thereby, when concrete sample 22 is twisted off, control element can be directly according to torsion peak value and conversion formula, directly obtain the compressive strength of concrete sample 22, and show by the display screen 111 on torque tube 11, be convenient to the user and read, and simplify the operation.
Calibrated wrench method detection method according to above-mentioned concrete crushing strength, the present invention also provides the calibrated wrench method detector of coagulation compressive strength, it comprises holder 12, the jaws that there is front opening in holder 12, and holder 12 is externally connected with torque tube 11, jaws is inserted in the concrete sample 22 at concrete component 2, thereby the inwall that makes jaws is connected to outside concrete sample 22, and torque tube 11 and jaws are in plumbness, like this, in testing process, direct driving torque bar 11, making torque tube 11 drive holder 12 rotates, utilize jaws to clamp concrete sample 22, thereby the torsion applied along with torque tube 11 constantly increases, concrete sample 22 will be twisted off, now, obtain the torsion peak value, utilize the conversion formula between this torsion peak value and compressive strength, can obtain concrete compressive strength.
Certainly, in above-mentioned operating process, can drill at the diverse location of concrete component or concrete structural solid 2 a plurality of concrete samples 22, thereby obtain the compressive strength of a plurality of concrete samples 22 on same concrete component or concrete structural solid 2, and then obtain the mean value of a plurality of compressive strength, be concrete compressive strength.
Utilize 1 pair of concrete component of above-mentioned calibrated wrench method detector or concrete structural solid 2 to be detected, its have little to 2 damages of concrete component or concrete structural solid, accuracy of detection is high and the advantage such as applied widely.
In the present embodiment, holder 12 comprises that pedestal 122 and two is connected to the clamping plate that are arc surfaced 121 at pedestal 122 two ends, two clamping plate 121 extend towards the inboard of pedestal 122 respectively, be oppositely arranged, form the jaws of above-mentioned holder 12 between the two, in testing process, clamping plate 121 are placed in to the annular groove 21 that concrete component or concrete structural solid 2 drill, make the inwall of clamping plate 121 be connected to outside concrete sample 22, clamp concrete sample 22.Certainly, clamping plate 121 herein are arc surfaced, and radian is consistent with the radian of annular groove 21, could keep like this itself and the coordinating of concrete sample 22.
Torque tube 11 is connected on pedestal 122, and extends outwardly, and itself and clamping plate 121 are and are arranged vertically, like this, when clamping plate 121 be clipped in concrete sample 22 outer after, utilize torque tube 11 to rotate, make concrete sample 22 be twisted off, now, shear stress is consistent with the cross-wise direction that concrete sample 22 is twisted off.
In the present embodiment, in testing process, in order to make clamping plate 121 can clamp concrete sample 22, be provided with the pushing structure of the movement that can make clamping plate 121 move with respect to pedestal 122 in pedestal 122, like this, by making clamping plate 121 relatively move with respect to another clamping plate 121 or two clamping plate 121, make the wide variety of jaws, thereby make clamping plate 121 can clamp concrete sample 22.
Particularly, pushing structure comprises the screw rod 123 be arranged in pedestal 122, this screw rod 123 extends layout along the length direction of pedestal 122, its surface has the first screw thread, and be emerging in outside pedestal 122, the outer end of clamping plate 121 is bending, form connection strap, this connection strap is plugged in pedestal 122, and which is provided with the second screw thread with the first threaded engagement of screw rod 123, like this, by lead-screw 123, rotate, utilize coordinating and the propelling relation between the first screw thread and the second screw thread, can be so that the wide variety of the jaws between clamping plate 121, namely, in testing process, can pass through rotating screw bolt 123, make clamping plate 121 clamp concrete sample 22.
In the present embodiment, clamp concrete sample 22 for what make that clamping plate 121 can be more firm, the inside surface of clamping plate 121 is provided with concaveconvex structure 124, when clamping plate 121 clamp concrete sample 22, this concaveconvex structure 124 can be embedded in the surface of concrete sample 22, thereby, in the process detected, avoid skidding between holder 12 and concrete sample 22, be convenient to detect, and improve accuracy of detection.
In order to realize the full-automation detected, in the present embodiment, be provided with control element in torque tube 11, this control element can detect torque tube 11 and be applied to the torsion on holder 12, and be embedded in the conversion formula of torsion and compressive strength, thereby, when concrete sample 22 is twisted off, control element can directly obtain the compressive strength of concrete sample 22.
Watch comparatively intuitively testing result for the ease of the user, in the present embodiment, the surface of torque tube 11 is provided with display screen 111, and this display screen 111 is electrically connected control element, and it can be for showing testing result.Certainly, control element also can be electrically connected on other display device externally, and for example, small displays etc., like this, can not need directly to arrange on the surface of torque tube 11 display screen 111.
In the present embodiment, pedestal 122 block that extends outwardly out, torque tube 11 is connected on this block, like this, makes torque tube 11 be connected with pedestal 122, certainly, for the ease of operation, between torque tube 11 and block, can be rotationally connected.
Embodiment bis-
As shown in Figure 3, be another preferred embodiment provided by the invention.
The difference of the present embodiment and embodiment mono-is: in the present embodiment, torque tube 11 is one-body molded with pedestal 122, that is to say between the two fixing, above-mentioned pushing structure comprises chute 126 and the bearing pin 125 that is arranged on pedestal 122, chute 126 extends layout along the length direction of pedestal 122, bearing pin 125 is located in chute 126, and be connected on clamping plate 121, like this, along with bearing pin 125 can move in chute 126, make the width of the jaws between two clamping plate 121 change, certainly, when clamping plate 121 are clamped concrete sample 22, directly utilize securing member to be connected on bearing pin 125, the position of strap 121 on pedestal 122.
In the present embodiment, can be by the length of chute 126 is set, the distance that makes clamping plate 121 move, the namely width range of jaws.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. the calibrated wrench method detection method of concrete crushing strength, is characterized in that, comprises the following steps:
1) concrete that, on concrete component or concrete structural solid, drill annular groove, described annular groove surrounds forms concrete sample to be detected;
2), the calibrated wrench method detector is sheathed on described concrete sample, and apply torsion, until described concrete sample is twisted off;
3), when the moment that described concrete sample is twisted off, obtain the torsion peak value that described calibrated wrench method detector applies;
4), by the conversion formula of described torsion peak value substitution torsion and compressive strength, obtain the compressive strength of described concrete sample;
5), in the diverse location difference repetitive operation above-mentioned steps 1 of described concrete sample)～step 4), record the compressive strength of a plurality of different concrete samples, and then ask for the mean value of the compressive strength of a plurality of concrete samples, thereby obtain concrete compressive strength.
2. the calibrated wrench method detection method of concrete crushing strength as claimed in claim 1, it is characterized in that, described calibrated wrench method detector comprises holder, described holder has the jaws of front opening, and described holder is connected with torque tube, in above-mentioned steps 2) in, described holder is sheathed in described annular groove, make the inwall of described jaws be connected to the outer wall of described concrete sample, make described torque tube perpendicular to described jaws, described torque tube is rotated around described concrete sample, apply torsion to described concrete sample.
3. the calibrated wrench method detector of concrete crushing strength, compressive strength for detection of concrete component or concrete structural solid, be formed with annular groove on described concrete component or concrete structural solid, the concrete that described annular groove surrounds forms concrete sample to be detected, it is characterized in that, described torque tester comprises pedestal, has front opening in described holder and is sheathed on the jaws of described concrete sample, and described torque tube is perpendicular to described jaws.
4. the calibrated wrench method detector of concrete crushing strength as claimed in claim 3, it is characterized in that, described holder comprises that pedestal and two is connected to described pedestal two ends and is placed in the clamping plate that described annular groove is connected to described concrete sample outer wall, two described clamping plate positioned opposite, and be arc surfaced, two described clamping plate surround and form described jaws, and described torque tube is connected in described pedestal, it extends outwardly, and described torque tube is perpendicular to described clamping plate.
5. the calibrated wrench method detector of concrete crushing strength as claimed in claim 3, is characterized in that, is provided with in described torque tube and detects the control element that torque tube applies torsion and described torsion is changed to concrete crushing strength.
6. the calibrated wrench method detector of concrete crushing strength as claimed in claim 3, is characterized in that, described torque tube is provided with for showing the display screen of concrete crushing strength.
7. the calibrated wrench method detector of concrete crushing strength as claimed in claim 3, is characterized in that, the inwall of described clamping plate is provided with the concaveconvex structure be embedded in described concrete sample surface.
8. as the calibrated wrench method detector of the described concrete crushing strength of claim 3～7 any one, it is characterized in that, be provided with the pushing structure that can make described clamping plate move with respect to described pedestal in described pedestal.
9. the calibrated wrench method detector of concrete crushing strength as claimed in claim 8, it is characterized in that, described pushing structure comprises the screw rod that is placed in described pedestal, described screw rod extends layout along the length direction of described pedestal, its surface is provided with and is revealed in the first outer screw thread of described pedestal, the outer end of described clamping plate is bending, forms and is inserted in the connection strap in described pedestal, and described connection strap is provided with the second screw thread with described the first threaded engagement.
10. the calibrated wrench method detector of concrete crushing strength as claimed in claim 8, it is characterized in that, described pushing structure comprises chute and the bearing pin of being located in described pedestal, described chute extends layout along the length direction of described pedestal, described bearing pin is arranged in described chute, and is connected in described clamping plate.
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| CN103983524A (en) * | 2014-06-11 | 2014-08-13 | 太原理工大学 | Device for detecting concrete compression strength by torque method |
| CN112051149A (en) * | 2020-09-25 | 2020-12-08 | 新疆生产建设兵团建筑工程科学技术研究院有限责任公司 | Top-pulling type detection method for concrete strength |
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| CN101620042A (en) * | 2008-07-02 | 2010-01-06 | 张国志 | Method for detecting compressive strength of concrete by body sampling |
| CN203443864U (en) * | 2013-08-22 | 2014-02-19 | 王文明 | Torque method detector for detecting concrete compression strength |
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| CN103983524A (en) * | 2014-06-11 | 2014-08-13 | 太原理工大学 | Device for detecting concrete compression strength by torque method |
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| CN112051149A (en) * | 2020-09-25 | 2020-12-08 | 新疆生产建设兵团建筑工程科学技术研究院有限责任公司 | Top-pulling type detection method for concrete strength |
| CN112051149B (en) * | 2020-09-25 | 2022-12-02 | 新疆生产建设兵团建筑工程科学技术研究院有限责任公司 | Top-pulling type detection method for concrete strength |
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