CN112393975A - Concrete elasticity modulus apparatus of quick location installation - Google Patents

Concrete elasticity modulus apparatus of quick location installation Download PDF

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Publication number
CN112393975A
CN112393975A CN201910746430.0A CN201910746430A CN112393975A CN 112393975 A CN112393975 A CN 112393975A CN 201910746430 A CN201910746430 A CN 201910746430A CN 112393975 A CN112393975 A CN 112393975A
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CN
China
Prior art keywords
ring
upper ring
lower ring
displacement sensor
positioning platform
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910746430.0A
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Chinese (zh)
Inventor
马亮怡
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Guangdong University of Technology
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Guangdong University of Technology
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Publication date
Application filed by Guangdong University of Technology filed Critical Guangdong University of Technology
Priority to CN201910746430.0A priority Critical patent/CN112393975A/en
Publication of CN112393975A publication Critical patent/CN112393975A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • 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
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • 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
    • G01N3/02—Details
    • G01N3/04—Chucks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • 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
    • G01N2203/0001—Type of application of the stress
    • G01N2203/0003—Steady
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • 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
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0019—Compressive
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • 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
    • G01N2203/0058—Kind of property studied
    • G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
    • G01N2203/0075—Strain-stress relations or elastic constants
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • 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
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/025—Geometry of the test
    • G01N2203/0252—Monoaxial, i.e. the forces being applied along a single axis of the specimen
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • 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
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/04—Chucks, fixtures, jaws, holders or anvils
    • G01N2203/0423—Chucks, fixtures, jaws, holders or anvils using screws
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • 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
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/04—Chucks, fixtures, jaws, holders or anvils
    • G01N2203/0447—Holders for quick insertion/removal of test pieces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • 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
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/067—Parameter measured for estimating the property
    • G01N2203/0676—Force, weight, load, energy, speed or acceleration
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • 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
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/067—Parameter measured for estimating the property
    • G01N2203/0682—Spatial dimension, e.g. length, area, angle

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The invention relates to a concrete elastic modulus tester capable of being positioned and installed quickly.A positioning platform is arranged on an auxiliary bracket and used for fixing the positions of an upper ring and a lower ring, and two leveling screws are arranged below each positioning platform and used for finely adjusting the horizontal positions of the upper ring and the lower ring. The upper ring and the lower ring are respectively fastened on the outer wall of the concrete test piece through fastening screws. The displacement sensor is fixed by a bolt through a vertical hole on the upper ring, so that the displacement sensor can not slide with the upper ring in the stress process of the test piece. The invention can quickly position the upper ring and the lower ring through the positioning platform on the auxiliary bracket, and can adjust the horizontal positions of the upper ring and the lower ring, and the positioning rods do not need to be repeatedly disassembled for a large batch of test pieces. The positioning platform on the auxiliary support is fixed through the bolts, the position can be adjusted up and down according to actual requirements, and the applicability is wide.

Description

Concrete elasticity modulus apparatus of quick location installation
Technical Field
The invention relates to a concrete elasticity modulus tester capable of being positioned and installed quickly.
Technical Field
The concrete elasticity modulus tester currently used is shown in fig. 1 and comprises an upper ring 1, a lower ring 2, a set screw 3, a displacement sensor 4, a positioning bolt 5 and a long positioning rod 6. The top view is shown in fig. 2. The current basic method is as follows: the dimension of the test piece is measured to be length multiplied by width multiplied by height multiplied by 150 multiplied by 300, a long positioning rod 6 is firstly installed in three grooves of every 120 degrees in an upper ring 1 and a lower ring 2, a positioning bolt 5 is tightened to fix the height of the upper ring 1 and the lower ring 2, then a set screw 3 of every 90 degrees on the side surfaces of the upper ring 1 and the lower ring 2 is tightened to the surface of the concrete test piece, and the positions of the upper ring 1 and the lower ring 2 are fixed. The displacement sensor 4 lightly touches the platform of the lower ring 2 through the vertical hole of the upper ring 1, screws up the bolt and fixes the positions of the displacement sensor 4 and the upper ring 1. After the upper ring 1 and the lower ring 2 are positioned, the positioning bolt 5 is unscrewed, and the long positioning rod 6 is removed.
During the test, the concrete test block, the upper ring 1, the lower ring 2 and the displacement sensor 4 are placed in a mechanical testing machine together to measure the elastic modulus, in the test, uniform force is applied to the upper surface and the lower surface of the concrete test block according to a certain loading rate, the concrete test block is firstly subjected to elastic deformation, in the test process, the upper ring 1 and the lower ring 2 are fixed at positions 75mm away from the upper edge and the lower edge of the test block through the fastening screws 3, the upper ring 1 and the lower ring 2 generate displacement along with the deformation of the test block, the relative displacement of the upper ring 1 and the lower ring 3 is measured by the displacement sensor 4, the load applied by the comprehensive mechanical testing machine can be used for calculating the elastic modulus of the concrete. After the determination is finished, the long positioning rod 6 is installed again to position the next test piece.
The problems of the current elastic modulus measuring instrument are as follows: 1) the positioning long rod can only roughly position the heights of the upper ring and the lower ring, and the level of the upper ring and the lower ring cannot be ensured; 2) the positioning long rod is repeatedly installed and detached when each test piece is tested, and a large amount of time is consumed; 3) the contact surface of the set screw and the concrete test piece is small, local force is generated, the elastic modulus is easy to crack from the position of the set screw in the measurement process, so that the upper ring and the lower ring are separated from the original fixed positions, and the test result is influenced. 4) The relative positions of the upper ring and the lower ring are single, and the method is only suitable for one measuring range.
Disclosure of Invention
The invention provides a concrete elastic modulus tester capable of being positioned and installed quickly, which overcomes the problems in the prior art, and the concrete elastic modulus tester can ensure that the upper positioning platform and the lower positioning platform of two auxiliary supports are positioned at required heights and kept horizontal by adjusting the heights of the positioning platforms on the auxiliary supports and adjusting leveling screws on the positioning platforms, does not need to repeatedly install and disassemble a positioning long rod when measuring the elastic modulus of a plurality of test pieces, only needs to adjust the positioning platforms once before testing, then places an upper ring and a lower ring on the positioning platforms, and directly fixes the positions of the upper ring and the lower ring through the fastening screws.
The technical scheme of the invention is realized as follows:
the utility model provides a concrete elasticity modulus apparatus of quick location installation, includes to fit with a contraceptive ring, lower ring, auxiliary stand, positioning platform, and on positioning platform passed through the bolt fastening in auxiliary stand, displacement sensor passed through the vertical hole of bolt fastening in fitting with a contraceptive ring, fitted with a contraceptive ring and set screw with every 90 settings of lower ring side, make upper and lower ring fastening on concrete sample surface.
Preferably, the auxiliary support is provided with a graduated scale, the two auxiliary supports are used simultaneously, and the two layers of positioning platforms are respectively adjusted to the same position.
Preferably, two leveling screws arranged on the positioning platform are used for installing the upper ring and the lower ring on the positioning platform before testing the first test piece, the leveling screws are adjusted by virtue of a level gauge to enable the upper ring and the lower ring to be in a horizontal position, then the fastening screws are fastened on the surface of the concrete test piece to fix the positions of the upper ring and the lower ring, and the auxiliary support and the positioning platform are not required to be adjusted for subsequent test pieces. The set screw for fixing the upper ring and the lower ring has a large end area, so that the concrete surface is prevented from cracking due to external force of the screw. The upper end of the displacement sensor is tightly connected with the upper ring through the vertical hole of the upper ring and the bolt, so that the displacement sensor cannot slide in the test process, and the lower end of the displacement sensor touches the lower ring lightly.
The invention has the following beneficial effects: the invention has the advantages that only one-time positioning and leveling is needed, the upper ring and the lower ring can be quickly positioned and installed on a plurality of test pieces, the positioning long rod does not need to be repeatedly installed and disassembled, the height of the positioning platform on the auxiliary support can be adjusted according to the requirement, and the invention is suitable for various measuring ranges.
Drawings
Fig. 1 is a schematic structural diagram of the prior art.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a schematic structural diagram of the present invention.
FIG. 4 is a top view of the present invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
Example 1:
as shown in figures 3 and 4, the concrete elasticity modulus tester capable of being quickly positioned and installed comprises an upper ring 1, a lower ring 2, a set screw 3, a displacement sensor 4, an auxiliary bracket 5, a positioning bolt 6, a leveling bolt 7 and a positioning platform 8. Two leveling screws 7 arranged on the positioning platform 8 are used for installing the upper ring 1 and the lower ring 2 on the positioning platform 8 before testing a first test piece, adjusting the leveling screws by means of a level meter to enable the upper ring 1 and the lower ring 2 to be in a horizontal position, then tightly fixing the tightening screws on the surface of the concrete test piece, fixing the positions of the upper ring 1 and the lower ring 2, and enabling subsequent test pieces to be free from adjusting auxiliary supports and the positioning platform. The set screws 3 of the upper fixed ring 1 and the lower fixed ring 2 are set screws with large end areas, so that the concrete surface cracking caused by the external force of the screws is prevented. The upper end of the displacement sensor 4 is tightly connected with the upper ring 1 through a bolt through a vertical hole of the upper ring, and the lower end of the displacement sensor is in light contact with the lower ring.
When the device is used, the positioning platforms 8 are respectively adjusted to positions to be detected, the upper ring 1 and the lower ring 3 are respectively fixed at positions 75mm away from the upper section and the lower section of a concrete sample, the detection distance can be determined by screwing the positioning bolts 6, and then the fastening screws 3 of which the side surfaces of the upper ring and the lower ring are one at every 90 degrees are screwed. The auxiliary support 6 is then removed and ready for testing.
During the test, the concrete test block, the upper ring 1, the lower ring 2 and the displacement sensor 4 are placed in a mechanical testing machine together to measure the elastic modulus, in the test, uniform force is applied to the upper surface and the lower surface of the concrete test block according to a certain loading rate, the concrete test block is firstly subjected to elastic deformation, in the test process, the upper ring 1 and the lower ring 2 are fixed at positions 75mm away from the upper edge and the lower edge of the test block through the fastening screws 3, the upper ring 1 and the lower ring 2 generate displacement along with the deformation of the test block, the relative displacement of the upper ring 1 and the lower ring 3 is measured by the displacement sensor 4, the load applied by the comprehensive mechanical testing machine can be used for calculating the elastic modulus of the concrete.
After the test is finished, the set screws 3 are removed, the upper ring 1, the lower ring 2 and the displacement sensor 4 are taken out, the positioning support is placed beside the next concrete test piece, the upper ring 1, the lower ring 2 and the displacement sensor 4 are placed on the positioning platform 8, the set screws 3 are directly screwed without repositioning and leveling, and the elastic modulus tester can be quickly positioned and installed.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and are not intended to limit the embodiments of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The utility model provides a concrete elasticity modulus apparatus of quick location installation, includes to fit with a contraceptive ring, lower ring and displacement sensor, displacement sensor respectively with fit with a contraceptive ring, lower ring connection, its characterized in that: still including locating platform, locating platform still is equipped with the auxiliary stand, be equipped with vertical spout on the auxiliary stand.
2. The apparatus of claim 1, wherein the apparatus comprises: the positioning platform is connected with the auxiliary supports through positioning bolts, and the number of the auxiliary supports is at least two.
3. The positioning platform of claim 2, wherein: the test device further comprises two leveling screws arranged on the positioning platform, the upper ring and the lower ring are installed on the positioning platform before the first test piece is tested, and the leveling screws are adjusted to enable the upper ring and the lower ring to be in a horizontal position.
4. The apparatus of claim 1, wherein the apparatus comprises: the side surfaces of the upper ring and the lower ring comprise a set screw every 90 degrees.
5. The upper and lower rings of claim 4, wherein: the device also comprises 4 set screws, wherein the set screws are arranged at every 90 degrees in a reversing way, the set screws are connected with the surface of the concrete test piece, the positions of the upper ring and the lower ring are fixed through the set screws, and the auxiliary support and the positioning platform do not need to be adjusted for subsequent test pieces.
6. The apparatus of claim 1, wherein the apparatus comprises: the displacement sensor is fixedly connected with the upper ring, and the lower end of the displacement sensor is in light contact with the lower ring.
7. The set screw of claim 5, wherein: the end part of the fastening screw has larger area and forms surface contact with the concrete sample instead of point contact.
CN201910746430.0A 2019-08-13 2019-08-13 Concrete elasticity modulus apparatus of quick location installation Pending CN112393975A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910746430.0A CN112393975A (en) 2019-08-13 2019-08-13 Concrete elasticity modulus apparatus of quick location installation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910746430.0A CN112393975A (en) 2019-08-13 2019-08-13 Concrete elasticity modulus apparatus of quick location installation

Publications (1)

Publication Number Publication Date
CN112393975A true CN112393975A (en) 2021-02-23

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117760825A (en) * 2023-11-30 2024-03-26 西南石油大学 Device and method for measuring elastic modulus of mass concrete

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117760825A (en) * 2023-11-30 2024-03-26 西南石油大学 Device and method for measuring elastic modulus of mass concrete

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