CN214622091U - Cylindric solid concrete compressive strength detection device - Google Patents
Cylindric solid concrete compressive strength detection device Download PDFInfo
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- CN214622091U CN214622091U CN202120476006.1U CN202120476006U CN214622091U CN 214622091 U CN214622091 U CN 214622091U CN 202120476006 U CN202120476006 U CN 202120476006U CN 214622091 U CN214622091 U CN 214622091U
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Abstract
A kind of cylindrical concrete compressive strength detection device of the solid, including the bow-shaped sample located in cylindrical concrete of solid, distribute the metal pressure head, miniature screw rod hydraulic jack, spherical bearing, reaction beam sequentially on it; two ends of the counter-force beam are respectively connected with two ends of the metal tank chain and hoop the cylindrical solid concrete, the metal pressure head, the miniature screw oil jack and the spherical support ring therein. The utility model discloses a cylindric solid concrete is banded to counter-force crossbeam and metal tank chain circle, and rethread metal pressure head, miniature screw rod hydraulic jack, spherical bearing exert pressure on bow-shaped sample, are spade shape and destroy until bow-shaped sample, read the biggest spade and appear and destroy the load value to according to concrete compressive strength and spade shape and destroy the conversion formula of establishing between the load value and estimate concrete compressive strength. The invention has reasonable design, accurate detection and strong practicability.
Description
Technical Field
The utility model relates to a cylindric solid concrete compressive strength detection device.
Background
The compressive strength is one of important performance parameters of concrete, and is directly related to the quality safety and normal use of concrete structural members and even the whole engineering. Therefore, it is a very important task to measure the compressive strength of concrete.
In the prior art, there are many common methods for detecting the compressive strength of concrete, which are briefly described as follows: (1) a shearing and pressing method. The concrete shear-compression instrument is utilized to apply pressure perpendicular to the pressure bearing surface to the surface of the right-angle side of the concrete member, so that the right-angle side of the concrete member generates local shear-compression damage, and the compressive strength of the concrete member is estimated according to the shear pressure at the moment. The method has the following defects: concrete without right-angle edges, such as cylindrical pier concrete, cannot be detected, and detection practicability is affected. (2) Core drilling method. And drilling a concrete test piece on the concrete member, processing the concrete test piece into a standard core sample, and detecting the compressive strength of the standard core sample on a pressure testing machine. The detection method has the following defects: due to the size of the prepared standard core sample
On one hand, the damage to the structure is large, and on the other hand, the reinforcing steel bars cannot be sampled when being dense, so that the detection practicability is influenced. (3) Rebound method. And estimating the compressive strength of the concrete member according to the relationship between the surface hardness and the strength of the concrete member. The detection method has the following defects: through the relationship between the surface hardness and the strength, the derived compressive strength has lower precision, and the detection accuracy is influenced; the method is not suitable for concrete with the age of more than 1000 days and the curved surface radius of less than 250mm, and the detection practicability is influenced. (4) An ultrasonic rebound synthesis method. The compressive strength of the concrete is estimated based on the hardness of the surface of the concrete member and the ultrasonic wave velocity in the concrete member. The detection method has the following defects: the test operation flow is complicated, the test influence factors are more, various test deviations are easy to generate, and the detection accuracy is influenced; is not suitable for curved surface mixture with age over 2000 daysConcrete, such as cylindrical pier concrete, affects the detection practicability. (5) a pulling-out method. The compressive strength of the concrete is estimated according to the pulling-out force of the concrete member when the concrete member is damaged within the range of 30mm of the surface layer of the concrete member. The detection method has the following defects: complex drilling and groove grinding procedures are required in the detection process; curved concrete, like cylindric pier concrete, can't detect, influence the detection practicality. (6) A pull-off method. A core sample specimen having a diameter of 44 mm and a depth of 44 mm is drilled on the hardened concrete member, a pull-out test is performed by a device having an automatic clamping device, and the compressive strength of the concrete is estimated from the pull-out strength value of the core sample specimen. The detection method has the following defects: when the stress of the pull-off test piece is calculated, the diameter size of the position close to the fracture part of the test piece and perpendicular to each other needs to be measured, and the diameter of the test piece is small, so that accurate measurement is difficult, and the detection accuracy is affected.
In summary, when the compressive strength of the cylindrical solid concrete is detected, the above methods all have various disadvantages, so that innovative design is required.
SUMMERY OF THE UTILITY MODEL
The utility model provides a reasonable in design, the practicality is strong, detect accurate cylindric solid concrete compressive strength detection device. The device can solve the problems of various existing methods when the compressive strength of the cylindrical solid concrete is detected.
The utility model adopts the technical proposal that: a kind of cylindrical concrete compressive strength detection device of the solid, including the bow-shaped sample located in cylindrical concrete of solid, distribute the metal pressure head, miniature screw rod hydraulic jack, spherical bearing, reaction beam sequentially on it; two ends of the counter-force beam are respectively connected with two ends of the metal tank chain and hoop the cylindrical solid concrete, the metal pressure head, the miniature screw oil jack and the spherical support ring therein. The utility model discloses a cylindric solid concrete is banded to counter-force crossbeam and metal tank chain circle, and rethread metal pressure head, miniature screw rod hydraulic jack, spherical bearing exert pressure on bow-shaped sample, are spade shape and destroy until bow-shaped sample, read the biggest spade and appear and destroy the load value to according to concrete compressive strength and spade shape and destroy the conversion formula of establishing between the load value and estimate concrete compressive strength.
Further, the arch-shaped test sample comprises an arch-shaped surface and a pressure-receiving surface; the arch surface is a minor arch and is positioned on the longitudinal section of the cylindrical solid concrete, and the rise is not less than 60 mm; the compression surface is rectangular, is positioned on the surface of the cylindrical solid concrete and is vertically intersected with the arched surface, the long edge of the compression surface is coincided with the chord of the arched surface, and the short edge of the compression surface is not less than 20 mm.
Furthermore, the metal pressure head is formed by cutting a cylinder with the diameter of 40mm along a longitudinal axis, the longitudinal axis of a longitudinal section and the chord of the bow-shaped sample surface are perpendicularly intersected at the midpoint of the chord, and the longitudinal section and the bow-shaped sample surface are in the same plane; one end of the metal pressure head is contacted with the pressure surface of the bow-shaped sample, and the other end of the metal pressure head is fixedly connected with the bottom surface of the miniature screw oil jack; and the connecting line of the centers of gravity of the two ends of the metal pressure head is superposed with the extension line of the longitudinal axis of the miniature screw oil jack.
Furthermore, the top surface of the miniature screw oil jack is connected with the bottom surface of the counter-force beam through a spherical support; the miniature screw oil jack is provided with a digital pressure gauge.
Further, the reaction beam is made of steel and is a rectangular body, the upper bottom surface and the lower bottom surface are parallel to the pressure-bearing surface of the bow-shaped test sample, and the length of the reaction beam is at least 40mm greater than the sum of the diameter of the cylindrical solid concrete and the thickness of 2 times of the connecting hole of the metal tank chain.
Furthermore, the two ends of the metal tank chain are provided with connecting holes which are matched with the counter-force beam and can sleeve the end part of the counter-force beam in the connecting holes.
The utility model has the advantages that: (1) in carrying out the testing process, cramp cylindric solid concrete through counter-force crossbeam and metal tank chain circle, rethread metal pressure head, miniature screw rod oil jack, spherical support apply pressure on bow-shaped sample, destroy until bow-shaped sample is spade shape, read the biggest spade shape and destroy the load value to presume concrete compressive strength reasonable in design according to the conversion formula that concrete compressive strength and spade shape were destroyed and are destroyed between the load value, detect the accuracy. (2) All the instruments and equipment are convenient to process and purchase, and have great popularization value and strong practicability. (3) The method solves the problems of various existing methods when the compressive strength of the cylindrical solid concrete is detected.
Drawings
Fig. 1 is a schematic front view of the present invention.
Fig. 2 is a schematic view of the a-a head-up of the present invention.
Fig. 3 is a schematic view of the B-B head-up of the present invention.
Fig. 4 is a schematic top view of the present invention.
Fig. 5 is a schematic top view of the present invention.
Fig. 6 is a schematic top view of E-E of the present invention.
Figure 7 is the utility model discloses a metal tank chain picture.
Detailed Description
The present invention will be further described with reference to the following specific embodiments, but the present invention is not limited to these specific embodiments. It will be recognized by those skilled in the art that the present invention encompasses all alternatives, modifications, and equivalents as may be included within the scope of the claims.
Referring to fig. 1-7, a cylindrical solid concrete compressive strength detection device comprises an arch sample 8 positioned in cylindrical solid concrete 11, and a metal pressure head 7, a micro screw oil jack 6, a spherical support 3 and a counter-force beam 2 are sequentially arranged on the arch sample; two ends of the counter-force beam 2 are respectively connected with two ends of a metal tank chain 10 and hoop a cylindrical solid concrete 11, a metal pressure head 7, a miniature screw oil jack 6 and a spherical support 3 therein. The utility model discloses a cylindric solid concrete 11 is banded to counter-force crossbeam 2 and 10 rings of metal tank chain, and rethread metal pressure head 7, miniature screw rod hydraulic jack 6, spherical bearing 3 exert pressure on bow-shaped sample 8, destroy until bow-shaped sample 8 is spade shape, read the biggest spade and appear and destroy the load value to according to concrete compressive strength and spade and appear and destroy the conversion formula of establishing between the load value and estimate concrete compressive strength.
The cylindrical solid concrete 11 of this embodiment has a diameter of 500 mm.
The bow-shaped test sample 8 comprises a bow-shaped surface and a pressure-receiving surface; the cambered surface is a minor arc and is positioned on the longitudinal section of the cylindrical solid concrete 11, the rise is 60 mm, and the chord length is 170 mm; the compression surface is rectangular, is positioned on the surface of the cylindrical solid concrete and is vertically intersected with the arched surface, the long edge of the compression surface is coincided with the chord of the arched surface, and the short edge of the compression surface is 23 mm.
The metal pressure head 7 of the embodiment is formed by cutting a cylinder with the diameter of 40mm along a longitudinal axis, the longitudinal axis of a longitudinal section and the chord of the arch surface of the arch sample 8 are perpendicularly intersected at the midpoint of the chord, and the longitudinal section and the arch surface of the arch sample 8 are in the same plane; one end of the metal pressure head 7 is contacted with the pressure-bearing surface of the bow-shaped sample 8, and the other end of the metal pressure head is fixedly connected with the bottom surface of the miniature screw oil jack 6; and the connecting line of the centers of gravity of the two ends of the metal pressure head 7 is superposed with the extension line of the longitudinal axis of the miniature screw oil jack 6.
In the embodiment, the top surface of the miniature screw oil jack 6 is connected with the bottom surface of the counter-force beam 2 through the spherical support 3; the miniature screw oil jack 6 is provided with a digital pressure gauge 4.
In this embodiment, the reaction beam 2 is made of steel and is a rectangular body, and the upper and lower bottom surfaces are parallel to the pressure receiving surface of the bow-shaped sample 8, and have a length of 600mm, a width of 50mm and a height of 40 mm.
In this embodiment, the two ends of the metal tank chain 10 are provided with connecting holes 1 which are matched with the reaction beam 2 and can sleeve the end part of the reaction beam 2, wherein the width of each connecting hole 1 is 51mm, the height is 41mm, and the thickness is 30 mm.
The detection steps of this embodiment are as follows: (1) polishing the surface of the cylindrical solid concrete 11 by using a portable concrete polisher to form a rectangular plane which is 170mm multiplied by 50mm and is parallel to the longitudinal axis of the cylindrical solid concrete 11; (2) a portable concrete cutting machine is adopted, a diamond cutting blade with the diameter of 180mm is installed, and a cutting knife is longitudinally cut downwards along the connecting line of the middle points of the short sides of the rectangular plane to form a positioning groove 9 and an arched sample 8; (3) a metal tank chain 10 is looped around cylindrical solid concrete 11, and two ends of a counter-force beam 2 are respectively sleeved into the connecting holes 1; (4) a metal pressure head 7, a micro screw rod oil pressure jack 6 and a spherical support 3 are sequentially placed on a pressure-bearing surface of the bow-shaped sample 8, a longitudinal axis of a longitudinal section of the metal pressure head 7 is vertically intersected with a chord of the bow-shaped surface of the bow-shaped sample 8 at the midpoint of the chord, the longitudinal section and the bow-shaped surface of the bow-shaped sample 8 are on the same plane, and the top surface of the micro screw rod oil pressure jack 6 is connected with the bottom surface of the counter-force beam 2 through the spherical support 3; (5) keep the upper and lower bottom surface of counter-force crossbeam 2 parallel with bow-shaped sample 8 pressure receiving face, rotate application of force screw rod 5 on the miniature screw rod oil jack 6, exert pressure on bow-shaped sample 8, destroy until bow-shaped sample 8 is spade shape, read the biggest spade shape and destroy the load value to presume concrete compressive strength according to the conversion formula of establishing between concrete compressive strength and the spade shape destruction load value.
In this embodiment, the conversion formula is as follows:
Yi＝AXi+B
wherein: yi is a compressive strength conversion value (MPa) of the i-th cylindrical solid concrete 11 when the detection device is used for detection; xi is a maximum spade-shaped breaking load value (N) applied to the ith cylindrical solid concrete 11 when detected by the detection device; A. and B is the regression coefficient of the regression equation.
Of course, the conversion formula of the concrete compressive strength and the spade shaped breaking load value can be other formulas besides the above formula, and is not limited to the above formula.
Claims (6)
1. The utility model provides a cylindric solid concrete compressive strength detection device which characterized in that: the device comprises an arch sample positioned in cylindrical solid concrete, and a metal pressure head, a miniature screw oil jack, a spherical support and a counter-force beam are sequentially arranged on the arch sample; two ends of the counter-force beam are respectively connected with two ends of the metal tank chain and hoop the cylindrical solid concrete, the metal pressure head, the miniature screw oil jack and the spherical support ring therein.
2. The cylindrical concrete compressive strength detection device according to claim 1, characterized in that: the arched test sample comprises an arched surface and a pressure surface; the arch surface is a minor arch and is positioned on the longitudinal section of the cylindrical solid concrete, and the rise is not less than 60 mm; the compression surface is rectangular, is positioned on the surface of the cylindrical solid concrete and is vertically intersected with the arched surface, the long edge of the compression surface is coincided with the chord of the arched surface, and the short edge of the compression surface is not less than 20 mm.
3. The cylindrical concrete compressive strength detection device according to claim 1, characterized in that: the metal pressure head is formed by cutting a cylinder with the diameter of 40mm along a longitudinal axis, the longitudinal axis of a longitudinal section and the chord of the bow-shaped sample surface are perpendicularly intersected at the midpoint of the chord, and the longitudinal section and the bow-shaped sample surface are in the same plane; one end of the metal pressure head is contacted with the pressure surface of the bow-shaped sample, and the other end of the metal pressure head is fixedly connected with the bottom surface of the miniature screw oil jack; and the connecting line of the centers of gravity of the two ends of the metal pressure head is superposed with the extension line of the longitudinal axis of the miniature screw oil jack.
4. The cylindrical concrete compressive strength detection device according to claim 1, characterized in that: the top surface of the micro screw oil jack is connected with the bottom surface of the counter-force beam through a spherical support; the miniature screw oil jack is provided with a digital pressure gauge.
5. The cylindrical concrete compressive strength detection device according to claim 1, characterized in that: the reaction beam is made of steel and is a rectangular body, the upper bottom surface and the lower bottom surface are parallel to the pressure-bearing surface of the bow-shaped test sample, and the length of the reaction beam is at least 40mm greater than the sum of the diameter of the cylindrical solid concrete and the thickness of 2 times of the connecting hole of the metal tank chain.
6. The cylindrical concrete compressive strength detection device according to claim 1, characterized in that: and connecting holes which are matched with the counter-force beam and can sleeve the end part of the counter-force beam are formed at the two ends of the metal tank chain.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120476006.1U CN214622091U (en) | 2021-03-05 | 2021-03-05 | Cylindric solid concrete compressive strength detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120476006.1U CN214622091U (en) | 2021-03-05 | 2021-03-05 | Cylindric solid concrete compressive strength detection device |
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| CN214622091U true CN214622091U (en) | 2021-11-05 |
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| CN202120476006.1U Active CN214622091U (en) | 2021-03-05 | 2021-03-05 | Cylindric solid concrete compressive strength detection device |
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