CN111929167A - Concrete test block strength detection device and detection method thereof - Google Patents
Concrete test block strength detection device and detection method thereof Download PDFInfo
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
The invention discloses a concrete test block strength detection device and a detection method, which comprise the following steps: concrete test block locating member, supporting member and resilience method detection device, concrete test block locating member includes: box, pneumatic cylinder, mounting, universal joint, extruded article and U type groove support, the pneumatic cylinder mounting, U type groove support are fixed in inside the box, the pneumatic cylinder passes through the universal joint with the extruded article is connected and is controlled the extruded article carries out piston repetitive motion. The concrete test block detection device and the detection method can detect the concrete strength precision.
Description
Technical Field
The invention relates to the field of concrete strength, in particular to a concrete test block strength detection device and a detection method thereof.
Background
At present, most of concrete used in construction engineering is commercial concrete, the detection of the compressive strength of the concrete is one of the most common detection methods, and the inaccurate detection precision becomes a difficult problem to be solved urgently in the technical field of concrete strength detection.
The utility model discloses a chinese application number is 201920107717.4's utility model discloses a resilience method detects concrete compressive strength survey district and arranges device fast, including handle, support frame, roller bearing, cylinder and the outer seal of cylinder, the support frame is installed to handle one end, and the support frame includes the roller bearing, is equipped with the cylinder on the roller bearing, and the inside cavity of cylinder, cylinder are equipped with and push away the lid, are equipped with the outer seal of cylinder on the cylinder, and the outer seal of cylinder includes seal face district and non-seal face district, and the seal face district is including dyeing district and a plurality of evenly distributed's cell.
The prior art does not provide an effective solution for the concrete strength detection precision.
Disclosure of Invention
The invention aims to provide a concrete test block strength detection device and a detection method thereof aiming at the defects of the prior art.
The concrete test block strength detection device includes: concrete test block locating member, supporting member and resilience method detection device, concrete test block locating member is fixed in the supporting member top, concrete test block locating member includes: the rebound method detection device comprises a resiliometer, a moisture meter and a concrete strength calculation module, wherein the resiliometer and the moisture meter are electrically connected with the concrete strength calculation module; the resiliometer is used for detecting a rebound value H of the building concrete and sending the rebound value H to the concrete strength calculation module; the moisture meter is used for detecting the moisture content S of the building concrete and sending the moisture content S to the concrete strength calculation module, the concrete strength calculation module is used for calculating the strength value F of the building concrete according to the rebound value H and the moisture content S, and the vertical surface carbonization depth value T is obtained through conversion according to the strength value F and the rebound value H.
Further, the support component is a concrete rack formed by pouring concrete with the strength not lower than C30, the concrete rack is of a door-shaped structure, the thickness of the top plate is 150mm, the thickness of the side wall body is 200mm, and the height of the bottom of the top plate from the ground is 1800 mm.
Further, the concrete strength calculation module is realized by adopting an ARM9200 processing chip.
The invention provides a method for detecting the strength of a concrete test block, which is characterized by comprising the following steps:
step 3, solving the extraction force by adopting an extraction method;
and 4, acquiring a measurement area, and matching a corresponding function relation according to a preset function relation and the relation of the measurement area, wherein the function relation comprises a first function corresponding to the sound velocity value, a second function corresponding to the rebound value and a third function corresponding to the pull-out force, the first function is substituted into the sound velocity value to obtain first conversion strength, the second function is substituted into the rebound value to obtain second conversion strength, and the third function is substituted into the pull-out force to obtain third conversion strength.
Further, the step 1 of obtaining the sound speed value by using an ultrasonic method includes:
step 1.1, symmetrically and uniformly arranging five ultrasonic testing points on the parallel surface of the concrete test block along the diagonal line of the two surfaces;
and step 1.2, respectively measuring the ultrasonic propagation time of each point, calculating the ultrasonic sound velocity value of each point, and then solving the average sound velocity of five pairs of measured points to obtain the sound velocity value.
Further, the step 2 of obtaining the rebound value by the rebound method includes:
step 2.1, mounting the hydraulic cylinder on a U-shaped groove support welded in the box body, fixing the hydraulic cylinder by using a fixing piece, and then connecting the fixing piece with the box body through threads;
step 2.2, fixing one end of the universal joint to the hydraulic cylinder, and fixing the other end of the universal joint to the extrusion piece;
step 2.3, pouring concrete with the design strength not lower than C30 into a concrete rack serving as a supporting member;
step 2.4, during pouring, placing the box body on the top of the supporting member, arranging reinforcing ribs on two sides of the box body, and removing the concrete forming template after the strength of the concrete reaches the designed strength;
step 2.5, placing the standard concrete test block into a box body, wherein the test surface of the standard concrete test block is downward and kept horizontal;
step 2.6, starting the hydraulic cylinder, enabling the hydraulic cylinder to push the extrusion piece to uniformly pressurize the concrete test block to 60-150 kN, stopping the hydraulic cylinder, and keeping the pressure stable;
and 2.7, detecting the concrete in the box body by adopting a resiliometer and a moisture meter to calculate a concrete strength value F in the supporting member, and calculating a vertical surface carbonization depth value T according to the concrete strength F.
Further, the step 3 of obtaining the extraction force by using the extraction method includes:
step 3.1, inserting the expansion spring into the forming hole, and completely embedding the expansion spring anchoring step into the annular groove through the expansion rod to ensure reliable anchoring;
step 3.1, connecting and centering the puller and the anchoring piece by using a pull rod, and enabling the puller and the anchoring piece to be vertical to the surface of the concrete test block;
step 3.2, continuously and uniformly applying a pulling force to control the speed to be 0.5-1.0kN/s until the concrete test block is cracked and damaged and the reading of the force measuring display is not increased any more, and recording the limit pulling force value to be accurate to 0.1 kN;
and 3.3, when abnormality occurs in the pulling-out detection process, recording in detail, omitting the value, supplementing and detecting a detection point nearby the value, and after the pulling-out detection, repairing the damaged part of the concrete test block caused by the pulling-out detection.
Further, in step 4, the measurement area is obtained, and the corresponding functional relation is matched according to the relation between the preset functional relation and the measurement area, where the first functional formula is: f. of1＝a*Ci bWherein f is1As a first converted intensity, CiThe sound velocity value measured in the step 1 is obtained, and a and b are corresponding equation coefficients of the measurement area; the second function is: f. of2＝c*TdWherein f is2The first conversion strength is obtained, T is the vertical surface carbonization depth value measured in the step 2, and c and d are equation coefficients corresponding to the measurement area; the third function is: f. of3＝ePi+ g, wherein, f3Is the third converted intensity, PiAnd e and g are the extraction force measured in the step 3, and the e and g are the equation coefficients corresponding to the measuring region.
Further, the concrete strength value F calculated in step 2.7 adopts the following formula:
f ═ l + mH + nS, -40< l < -36,1.4< m <1.5,5.2< n <5.3, preferably, l ═ 38.216, the m ═ l.484, the n ═ 5.225, the strength value of the concrete can be accurately obtained by detecting the rebound value of the building concrete by a rebound tester and the water fraction of the building concrete by a moisture tester.
Further, the concrete strength value F calculated in step 2.7 adopts the following formula:
step 2.7, the following formula is adopted for calculating the vertical surface carbonization depth value T according to the concrete strength F:
Compared with the prior art, the concrete test block detection device and the detection method thereof have the following remarkable advantages and effects:
the concrete test block strength detection device and the detection method thereof can change according to different equation coefficients of a measurement area so as to better fit the local conversion strength, and the error between the finally obtained conversion strength and the actual conversion strength is smaller by detecting the concrete carbonization depth value, so that the concrete test block strength measurement precision is improved.
Drawings
FIG. 1 is a schematic perspective view of a concrete test block strength detection apparatus according to the present invention;
FIG. 2 is a schematic plan view of the concrete test block positioning member according to the present invention.
Shown in the figure: 1-concrete test block positioning component, 11-box, 12-hydraulic cylinder, 13-fixing piece, 14-universal joint, 15-extrusion piece, 16-U-shaped groove bracket, 17-concrete test block, 18-anchoring piece; 2-a support member.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
Example 1
As shown in FIGS. 1-2, the device for detecting the strength of the concrete test block comprises: concrete test block locating member 1, supporting member 2 and resilience method detection device (not shown in the figure), concrete test block locating member 1 is fixed in the 2 tops of supporting member, and concrete test block locating member 1 includes: the rebound method detection device comprises a box body 11, a hydraulic cylinder 12, a fixing piece 13, a universal joint 14, an extrusion piece 15 and a U-shaped groove support 16, wherein the hydraulic cylinder 12, the fixing piece 13 and the U-shaped groove support 16 are fixed inside the box body 11, the hydraulic cylinder 12 is connected with the extrusion piece 15 through the universal joint 14 and controls the extrusion piece 15 to perform piston reciprocating motion, the rebound method detection device comprises a rebound instrument (not shown), a moisture meter (not shown) and a concrete strength calculation module (not shown), and the rebound instrument and the moisture meter are both electrically connected with the concrete strength calculation module; the resiliometer is used for detecting a rebound value H of the building concrete and sending the rebound value H to the concrete strength calculation module; the moisture meter is used for detecting the moisture percentage S of the building concrete and sending the moisture percentage S to the concrete strength calculation module, the concrete strength calculation module is used for calculating the strength value F of the building concrete according to the rebound value H and the moisture percentage S, and the vertical plane carbonization depth value T is obtained through conversion according to the strength value F and the rebound value H.
Further, the supporting member 2 is a concrete rack formed by pouring concrete with the strength not lower than C30, the concrete rack is of a door-shaped structure, the thickness of a top plate is 150mm, the thickness of a side wall body is 200mm, and the height of the bottom of the top plate from the ground is 1800 mm.
Further, the center axis of the hydraulic cylinder 12, the midpoint of the universal joint 14, and the midpoint of the extrusion 15 are on the same axis.
Further, the fixing member 13 is a U-shaped clip, and the hydraulic cylinder 12 is fixed in the box 11 by the U-shaped clip.
Further, anchoring parts 18 are uniformly distributed on the outer side wall of the box body 11 and used for stabilizing the box body 11.
Furthermore, the box body 11 is made of a steel plate with the length of 530mm, the width of 230mm, the height of 180mm and the thickness of 30mm, and an opening is formed in one side of the box body 11 with a large area.
Further, extrusion 15 is made of a steel plate having a length 165mm, a width 165mm, and a thickness 30 mm.
Further, the pressing member 15 can perform a piston reciprocating motion within a range of 0mm to 70mm of the hydraulic cylinder for pressing and fixing the concrete test block 17.
Further, the bottom of the U-shaped groove support 16 is fixedly connected with the inner wall of the box body 11, and the groove of the U-shaped groove support is connected with the hydraulic cylinder 12.
Further, the concrete strength calculation module is realized by adopting an ARM9200 processing chip.
The concrete test block detection method comprises the following steps:
step 3, solving the extraction force by adopting an extraction method;
and 4, acquiring a measurement area, and matching a corresponding function relation according to a preset function relation and the relation of the measurement area, wherein the function relation comprises a first function corresponding to the sound velocity value, a second function corresponding to the rebound value and a third function corresponding to the pull-out force, the first function is substituted into the sound velocity value to obtain first conversion strength, the second function is substituted into the rebound value to obtain second conversion strength, and the third function is substituted into the pull-out force to obtain third conversion strength.
Further, the step 1 of obtaining the sound speed value by using an ultrasonic method includes:
step 1.1, symmetrically and uniformly arranging five ultrasonic testing points on the parallel surface of the concrete test block along the diagonal line of the two surfaces;
and step 1.2, respectively measuring the ultrasonic propagation time of each point, calculating the ultrasonic sound velocity value of each point, and then solving the average sound velocity of 5 pairs of measuring points to obtain the sound velocity value.
Further, the step 2 of obtaining the rebound value by the rebound method includes:
step 2.1, installing the hydraulic cylinder 12 on a U-shaped groove support 16 welded in the box body 11, fixing the hydraulic cylinder by using a fixing piece 13, and then connecting the fixing piece 13 with the box body 11 in a threaded manner;
step 2.2, fixing one end of the universal joint 14 to the hydraulic cylinder 12, and fixing the other end of the universal joint 14 to the extrusion piece 15;
step 2.3, pouring concrete with the design strength not lower than C30 into a concrete platform as a supporting member 2;
step 2.4, during pouring, placing the box body 11 on the top of the supporting member 2, arranging reinforcing ribs on two sides of the box body 11, and removing the concrete forming template after the concrete strength reaches the designed strength;
step 2.5, placing the standard concrete test block into the box body 11, wherein the test surface of the standard concrete test block is downward and kept horizontal;
step 2.6, starting the hydraulic cylinder 12, enabling the hydraulic cylinder 12 to push the extrusion piece 15 to uniformly pressurize the concrete test block to 60-150 kN, stopping the hydraulic cylinder 12, and keeping the pressure stable;
step 2.7, detecting the concrete in the box body 11 by adopting a resiliometer and a moisture meter to calculate a concrete strength value F in the supporting member 2, and calculating a vertical plane carbonization depth value T according to the concrete strength F;
further, the concrete strength value F calculated in step 2.7 adopts the following formula:
f ═ l + mH + nS, -40< l < -36,1.4< m <1.5,5.2< n <5.3, preferably, l ═ 38.216, the m ═ l.484, the n ═ 5.225, the strength value of the concrete can be accurately obtained by detecting the rebound value of the building concrete by a rebound tester and the water fraction of the building concrete by a moisture tester.
Further, in step 2.7, the vertical surface carbonization depth value T is calculated according to the concrete strength F by using the following formula:
Further, the step 3 of obtaining the extraction force by using the extraction method includes:
step 3.1, inserting the expansion spring into the forming hole, and completely embedding the expansion spring anchoring step into the annular groove through the expansion rod to ensure reliable anchoring;
step 3.1, connecting and centering the puller and the anchoring piece by using a pull rod, and enabling the puller and the anchoring piece to be vertical to the surface of the concrete test block;
step 3.2, continuously and uniformly applying a pulling force to control the speed to be 0.5-1.0kN/s until the concrete test block is cracked and damaged and the reading of the force measuring display is not increased any more, and recording the limit pulling force value to be accurate to 0.1 kN;
and 3.3, when abnormality occurs in the pulling-out detection process, recording in detail, omitting the value, supplementing and detecting a detection point nearby the value, and after the pulling-out detection, repairing the damaged part of the concrete test block caused by the pulling-out detection.
Further, in step 4, the measurement area is obtained, and the corresponding functional relation is matched according to the relation between the preset functional relation and the measurement area, where the first functional formula is: f. of1＝a*Ci bWherein f is1As a first converted intensity, CiThe sound velocity value measured in the step 1 is obtained, and a and b are corresponding equation coefficients of the measurement area; the second function is: f. of2＝c*TdWherein f is2The first conversion strength is obtained, T is the vertical surface carbonization depth value measured in the step 2, and c and d are equation coefficients corresponding to the measurement area; the third function is: f. of3＝ePi+ g, wherein, f3Is the third converted intensity, PiAnd e and g are the extraction force measured in the step 3, and the e and g are the equation coefficients corresponding to the measuring region.
The above description is only for the preferred embodiment of the present invention and should not be construed as limiting the present invention, and various modifications and changes can be made by those skilled in the art without departing from the spirit and principle of the present invention, and any modifications, equivalents, improvements, etc. should be included in the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a concrete test block intensity detection device which characterized in that includes: concrete test block locating member, supporting member and resilience method detection device, concrete test block locating member is fixed in the supporting member top, concrete test block locating member includes: the rebound method detection device comprises a resiliometer, a moisture meter and a concrete strength calculation module, wherein the resiliometer and the moisture meter are electrically connected with the concrete strength calculation module; the resiliometer is used for detecting a rebound value H of the building concrete and sending the rebound value H to the concrete strength calculation module; the moisture meter is used for detecting the moisture percentage S of the building concrete and sending the moisture percentage S to the concrete strength calculation module, the concrete strength calculation module is used for calculating the strength value F of the building concrete according to the rebound value H and the moisture percentage S, and the vertical surface carbonization depth value T is obtained through conversion according to the strength value F and the rebound value H.
2. The concrete test block detection device of claim 1, wherein the support member is a concrete rack formed by pouring concrete with strength not lower than C30, the concrete rack is of a door-shaped structure, the thickness of the top plate is 150mm, the thickness of the side wall is 200mm, and the height of the bottom of the top plate from the ground is 1800 mm.
3. The concrete test block detection device of claim 1, wherein the concrete strength calculation module is implemented by an ARM9200 processing chip.
4. A method for detecting the strength of a concrete test block is characterized by comprising the following steps:
step 1, solving a sound velocity value by adopting an ultrasonic method;
step 2, calculating a rebound value by adopting a rebound method;
step 3, solving the extraction force by adopting an extraction method;
and 4, acquiring a measurement area, and matching a corresponding function relation according to a preset function relation and the relation of the measurement area, wherein the function relation comprises a first function corresponding to the sound velocity value, a second function corresponding to the rebound value and a third function corresponding to the pull-out force, the first function is substituted into the sound velocity value to obtain first conversion strength, the second function is substituted into the rebound value to obtain second conversion strength, and the third function is substituted into the pull-out force to obtain third conversion strength.
5. The method for detecting the strength of the concrete test block according to claim 4, wherein the step 1 of obtaining the sound velocity value by using the ultrasonic method comprises the following steps:
step 1.1, symmetrically and uniformly arranging five ultrasonic testing points on the parallel surface of the concrete test block along the diagonal line of the two surfaces;
and step 1.2, respectively measuring the ultrasonic propagation time of each point, calculating the ultrasonic sound velocity value of each point, and then solving the average sound velocity of five paired measuring points to obtain the sound velocity value.
6. The method for detecting the strength of the concrete test block according to claim 4, wherein the step 2 of obtaining the rebound value by the rebound method comprises the following steps:
step 2.1, mounting the hydraulic cylinder on a U-shaped groove support welded in the box body, fixing the hydraulic cylinder by using a fixing piece, and then connecting the fixing piece with the box body through threads;
step 2.2, fixing one end of the universal joint to the hydraulic cylinder, and fixing the other end of the universal joint to the extrusion piece;
step 2.3, pouring concrete with the design strength not lower than C30 into a concrete rack serving as a supporting member;
step 2.4, during pouring, placing the box body on the top of the supporting member, arranging reinforcing ribs on two sides of the box body, and removing the concrete forming template after the strength of the concrete reaches the designed strength;
step 2.5, placing the standard concrete test block into a box body, wherein the test surface of the standard concrete test block is downward and kept horizontal;
step 2.6, starting the hydraulic cylinder, enabling the hydraulic cylinder to push the extrusion piece to uniformly pressurize the concrete test block to 60-150 kN, stopping the hydraulic cylinder, and keeping the pressure stable;
and 2.7, detecting the concrete in the box body by adopting a resiliometer and a moisture meter to calculate a concrete strength value F in the supporting member, and calculating a vertical surface carbonization depth value T according to the concrete strength F.
7. The method for testing the strength of the concrete test block according to claim 4, wherein the step 3 of obtaining the pull-out force by using the pull-out method comprises:
step 3.1, inserting the expansion spring into the forming hole, and completely embedding the expansion spring anchoring step into the annular groove through the expansion rod to ensure reliable anchoring;
step 3.1, connecting and centering the puller and the anchoring piece by using a pull rod, and enabling the puller and the anchoring piece to be vertical to the surface of the concrete test block;
step 3.2, continuously and uniformly applying a pulling force to control the speed to be 0.5-1.0kN/s until the concrete test block is cracked and damaged and the reading of the force measuring display is not increased any more, and recording the limit pulling force value to be accurate to 0.1 kN;
and 3.3, when abnormality occurs in the pulling-out detection process, recording in detail, omitting the value, supplementing and detecting a measuring point nearby, and repairing the damaged part of the concrete test block caused by the pulling-out detection after the pulling-out detection.
8. The method for detecting the strength of the concrete test block according to claim 4, wherein the step 4 of obtaining the measuring area matches a corresponding functional relation according to a preset functional relation and the relation of the measuring area, and the first functional relation is as follows: f. of1＝a*Ci bWherein f is1As a first converted intensity, CiThe sound velocity value measured in the step 1 is obtained, and a and b are corresponding equation coefficients of the measurement area; the second function is: f. of2＝c*TdWherein f is2The first conversion strength is obtained, T is the vertical surface carbonization depth value measured in the step 2, and c and d are equation coefficients corresponding to the measurement area; the third function is: f. of3＝ePi+ g, wherein, f3Is the third converted intensity, PiAnd e and g are the extraction force measured in the step 3, and the e and g are the equation coefficients corresponding to the measuring region.
9. The method for detecting the strength of the concrete test block according to claim 6, wherein the step 2.7 of calculating the concrete strength value F adopts the following formula:
f is l + mH + nS, -40< l < -36,1.4< m <1.5,5.2< n <5.3, preferably l is-38.216, the m is l.484, the n is 5.225, the rebound value of the building concrete is detected only by a rebound tester, and the moisture rate of the building concrete is detected by a moisture meter to accurately obtain the strength value of the concrete.
10. The method for detecting the strength of the concrete test block according to claim 6, wherein the step 2.7 of calculating the concrete strength value F adopts the following formula:
step 2.7, the following formula is adopted for calculating the vertical surface carbonization depth value T according to the concrete strength F:
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114324006A (en) * | 2022-01-06 | 2022-04-12 | 青岛理工大学 | Detection apparatus for shear strength between polyester fiber concrete layer |
| CN114674660A (en) * | 2022-02-28 | 2022-06-28 | 交通运输部公路科学研究所 | Concrete permanent stress testing method |
| CN114878384A (en) * | 2022-07-08 | 2022-08-09 | 中铁十八局集团第四工程有限公司 | Concrete strength testing device and method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114324006A (en) * | 2022-01-06 | 2022-04-12 | 青岛理工大学 | Detection apparatus for shear strength between polyester fiber concrete layer |
| CN114324006B (en) * | 2022-01-06 | 2024-05-17 | 青岛理工大学 | Detection device for shear strength between polyester fiber concrete layers |
| CN114674660A (en) * | 2022-02-28 | 2022-06-28 | 交通运输部公路科学研究所 | Concrete permanent stress testing method |
| CN114674660B (en) * | 2022-02-28 | 2022-10-28 | 交通运输部公路科学研究所 | Concrete permanent stress testing method |
| CN114878384A (en) * | 2022-07-08 | 2022-08-09 | 中铁十八局集团第四工程有限公司 | Concrete strength testing device and method |
| CN114878384B (en) * | 2022-07-08 | 2022-11-04 | 中铁十八局集团第四工程有限公司 | Concrete strength testing device and method |
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