CN111912708B - Cement mortar splitting tensile test tool - Google Patents

Cement mortar splitting tensile test tool Download PDF

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Publication number
CN111912708B
CN111912708B CN202010829986.9A CN202010829986A CN111912708B CN 111912708 B CN111912708 B CN 111912708B CN 202010829986 A CN202010829986 A CN 202010829986A CN 111912708 B CN111912708 B CN 111912708B
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China
Prior art keywords
base
sliding sleeve
sample
notch
spring mechanism
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CN202010829986.9A
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Chinese (zh)
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CN111912708A (en
Inventor
刘建宇
刘琳
王同波
谢世军
陈永胜
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Shandong Liangong Testing Machine Co ltd
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Shandong Liangong Testing Machine Co ltd
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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
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0017—Tensile
    • 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
    • G01N2203/006—Crack, flaws, fracture or rupture
    • G01N2203/0067—Fracture or rupture
    • 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
    • G01N2203/026—Specifications of the specimen
    • G01N2203/0284—Bulk material, e.g. powders
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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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 discloses a cement mortar splitting tensile test fixture which is mainly used for carrying out splitting tensile strength test on cement mortar. The device comprises a base, a telescopic sliding sleeve and a spring mechanism, wherein a sample position is arranged on the base, two sides of the sample position are respectively provided with a vertical sliding sleeve, the bottom end of the sliding sleeve is matched with a transverse groove of the base, two symmetrical stepped holes are formed in the position of the sample on the base, one spring mechanism is arranged in each stepped hole, the top end of the spring mechanism protrudes out of the upper surface of the base, the upper end of the sliding sleeve is provided with a first notch, and the lower end of the sliding sleeve is provided with a second notch. The invention can prevent the sample from tilting and the steel pad strip from sliding sideways, thereby solving the problems of inaccurate test result and potential safety hazard caused by the tilting of the sample and the sliding sideways of the steel pad strip in the test process.

Description

Cement mortar splitting tensile test tool
Technical Field
The invention relates to a cement mortar splitting tensile test fixture which is mainly used for cement mortar splitting tensile tests.
Background
JTS/T236-2019 technical Specification for testing Water transportation engineering concrete test requires that the splitting tensile strength test be performed for cement mortar splitting. In the test, 70 x 70 cube samples are placed between an upper platen and a lower platen of a press machine, steel backing strips with the diameters of 4mm are respectively placed on the top surface and the bottom surface, the steel backing strips are gradually loaded, and the mortar splitting tensile strength f of the steel backing strips is calculated (Specification 10.10). However, during the test, the steel gasket strip is often directly placed between the upper and lower pressure plates of the universal testing machine or the press machine and the sample, and the following problems are often encountered during the test: 1. the cube sample is not on a plane, so that the sample is inclined and unstable, and the force has lateral component force, so that the calculation is inaccurate; 2. the steel pad strip is contacted with the sample wire, so that lateral sliding is easy to generate, and people are injured even by extrusion.
Disclosure of Invention
The invention is designed aiming at the problems that when the cement mortar splitting tensile strength test is carried out, the test sample is inclined and calculated inaccurately in the conventional test device, and the steel pad strip is contacted with the test sample line to generate lateral sliding. The invention provides a cement mortar splitting tensile test fixture, which solves the problems of inaccurate calculation, lateral sliding of a steel pad strip and even human injury caused by extrusion caused by unstable inclination of a cube sample and contact of the steel pad strip with a sample line during cement mortar splitting tensile strength test.
The invention is realized by the following technical scheme: a cement mortar splitting tensile test tool is characterized in that: including base, telescopic slip cap, spring mechanism, be provided with the sample position on the base, be equipped with one respectively in the both sides of sample position and set up perpendicularly slip cap, slip cap bottom with the base cross slot cooperation that base upper portion set up is provided with two symmetrical shoulder holes in sample position department on the base, every be provided with one in the shoulder hole spring mechanism, spring mechanism's top protrusion in the upper surface of base, slip cap's upper end has first notch, slip cap's lower extreme has the second notch.
When the invention is used, the base is arranged in the middle of a lower pressing disc of a universal machine or a press machine and the like, a sample is arranged above a sample position in the middle of the base, steel pad strips are respectively arranged in the middle of the upper surface and the lower surface of the sample, the sliding sleeve is arranged in a base transverse groove on the base, the positions of the sliding sleeve are adjusted to enable a first notch and a second notch at two ends of the sliding sleeve to be respectively aligned with the upper steel pad strip and the lower steel pad strip, the upper steel pad strip and the lower steel pad strip are respectively inserted into the corresponding notches, and the test machine is started, so that the upper pressing disc slowly compresses the device and the sample. The spring mechanism can support the sample to keep a normal position without tilting during the test, and the spring mechanism moves downwards along with the sample when the test is loaded. The upper steel cushion strip and the lower steel cushion strip are horizontally limited by the sliding sleeve, so that the upper steel cushion strip and the lower steel cushion strip cannot laterally move at the middle position of the sample, and when the upper pressure plate is pressed down, the sleeve descends along with the upper pressure plate, so that no influence is caused on the load.
Furthermore, for the convenience of installation and positioning, the pipe orifice of the sliding sleeve is square.
Further, for the installation of the sliding sleeve and the cooperation with the steel filler strip of being convenient for, one side of the base transverse groove close to the base end is of an opening structure.
Further, the spring mechanism comprises a screw rod, a nut and a spring, wherein the screw rod sequentially penetrates through the spring and the stepped hole and then is screwed with the nut below the stepped hole. The spring is in a compressed state after being screwed, and the top end of the spring mechanism protrudes out of the upper surface of the base, so that the sample can be supported to keep a normal position without tilting in the test process.
Further, for being convenient for cooperate and be convenient for carry out spacingly to the steel filler strip, sliding sleeve's first slot mouth is the circular arc mouth that the angle is greater than pi, and the second notch is the U type mouth.
The beneficial effects of the invention are as follows: firstly, the base is provided with the base transverse groove to position the sliding sleeve, and the steel pad strip can be limited by the sliding sleeve, so that the steel pad strip cannot slide laterally, and potential safety hazards in the test process are avoided; the invention adopts the design that the base is provided with the stepped hole and the spring mechanism is arranged in the hole, so that the sample keeps a normal position and does not incline in the test process, and the problem of inaccurate calculation caused by lateral component force is avoided.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a front view of the present invention in use;
FIG. 3 is a side view of FIG. 2;
FIG. 4 is a top view of FIG. 2 (upper platen not shown);
FIG. 5 is a schematic perspective view of a sliding sleeve according to the present invention;
FIG. 6 is a side view of a sliding sleeve according to the present invention;
FIG. 7 is a schematic perspective view of a base in the present invention;
FIG. 8 is a side view of a base in the present invention;
in the figure, 1, a base, 11, a sample position, 12, a base transverse groove, 13, a stepped hole, 2, a spring mechanism, 21, a screw rod, 22, a spring, 23, a nut, 3, a sliding sleeve, 31, a first notch, a second notch, 4, a steel gasket strip, 5, a sample, 6, a lower pressure plate, 7 and an upper pressure plate.
Detailed Description
The invention will now be further illustrated by means of specific examples, without being limiting thereto, in connection with the accompanying drawings.
A cement mortar splitting tensile test tool comprises a base 1, a spring mechanism 2 and a sliding sleeve 3.
The base 1 is of a cuboid structure, and a sample position 11, a base transverse groove 12 and a stepped hole 13 are formed in the base 1. The sample position 11 is the area of the upper surface of the base at the center. The number of the base transverse grooves 12 is two, the base transverse grooves 12 are positioned at symmetrical positions on two sides of the sample position 11, and one side, close to the end part of the base, of the base transverse grooves 12 is of an opening structure. The number of the stepped holes 13 is two, the stepped holes 13 are positioned at two symmetrical positions inside the sample position 11, are circular holes and penetrate through the upper surface and the lower surface of the base.
The two spring mechanisms 2 are respectively arranged in the stepped holes 13 and comprise a screw rod 21, a spring 22 and a nut 23, wherein the screw rod 21 sequentially penetrates through the spring 22 and the stepped holes 23 and then is screwed with the nut 23 below the stepped holes, the spring 22 is in a compressed state after being screwed, and the top end of the spring mechanism 2 protrudes out of the upper surface of the base 1.
The number of the sliding sleeves 3 is two, and the sliding sleeves 3 are telescopic and consist of two sleeved sleeves. The sliding sleeve 3 is vertically arranged at two sides of the sample position 11 and is matched with the base transverse groove 12 at the upper part of the base 1, the pipe orifice of the sliding sleeve 3 is square, the upper end of the sliding sleeve is provided with a first notch 31, the lower end of the sliding sleeve is provided with a second notch 32, preferably, the first notch 31 of the sliding sleeve is an arc opening with an angle larger than pi, the second notch 32 is a U-shaped opening, and the opening is downward.
When the invention is used for testing, the base 1 is arranged in the middle of the lower pressure plate 6 of a universal machine or a press machine and the like, the sample 5 is arranged above the sample position 11 in the middle of the base 1, two steel cushion strips 4 are respectively arranged in the middle of the upper surface and the lower surface of the sample 5, the sliding sleeve 3 is arranged in the base transverse groove 12 on the base 1, the positions of the sliding sleeve 3 are adjusted to enable the first notch 31 and the second notch 32 at the two ends of the sliding sleeve 3 to be respectively aligned with the upper steel cushion strip 4 and the lower steel cushion strip to be respectively inserted into the corresponding notches, and the testing machine is started, so that the upper pressure plate 7 slowly compresses the device and the sample 5.
The spring mechanism 2 can support the sample to maintain a normal position without tilting during the test, and the sample moves downwards along with the loading of the test. The spring supporting force has little influence on the load and can be ignored. The upper steel cushion strip and the lower steel cushion strip are horizontally limited by the sliding sleeve 3, so that the upper steel cushion strip and the lower steel cushion strip cannot laterally move at the middle position of a sample, and when the upper pressure plate is pressed down, the sleeve descends, so that no influence is caused on the load.
The invention has simple structure, can ensure that the sample keeps normal position and does not incline in the test process, and can improve the test accuracy; the steel pad strip can be ensured to slide laterally in the middle of the test process, and the safety of the test process is improved.
Other parts in this embodiment are related art, and are not described herein.

Claims (2)

1. A cement mortar splitting tensile test tool is characterized in that: the device comprises a base, a telescopic sliding sleeve and a spring mechanism, wherein a sample position is arranged on the base, two sides of the sample position are respectively provided with the sliding sleeve which is vertically arranged, the bottom end of the sliding sleeve is matched with a transverse base groove arranged on the upper part of the base, two symmetrical stepped holes are formed in the sample position on the base, one spring mechanism is arranged in each stepped hole, the top end of each spring mechanism protrudes out of the upper surface of the base, the upper end of the sliding sleeve is provided with a first notch, and the lower end of the sliding sleeve is provided with a second notch; the pipe orifice of the sliding sleeve is square; the first notch of the sliding sleeve is an arc opening with an angle larger than pi, and the second notch is a U-shaped opening; the spring mechanism comprises a screw rod, a nut and a spring, wherein the screw rod sequentially penetrates through the spring and the stepped hole and is screwed with the nut below the stepped hole; the sample is placed above the sample position in the middle of the base, two steel filler strips are respectively placed in the middle of the upper surface and the lower surface of the sample, and two ends of the two steel filler strips are respectively inserted into a first notch and a second notch on the sliding sleeves at two sides correspondingly.
2. The cement mortar splitting tensile test fixture of claim 1, wherein: one side of the base transverse groove, which is close to the end part of the base, is of an opening structure.
CN202010829986.9A 2020-08-18 2020-08-18 Cement mortar splitting tensile test tool Active CN111912708B (en)

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Application Number Priority Date Filing Date Title
CN202010829986.9A CN111912708B (en) 2020-08-18 2020-08-18 Cement mortar splitting tensile test tool

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Application Number Priority Date Filing Date Title
CN202010829986.9A CN111912708B (en) 2020-08-18 2020-08-18 Cement mortar splitting tensile test tool

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CN111912708B true CN111912708B (en) 2023-07-28

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113281163A (en) * 2021-06-22 2021-08-20 安徽理工大学 Tensile and anti-bending dual-purpose test fixture for laboratory

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07318471A (en) * 1994-05-26 1995-12-08 Ishikawajima Constr Materials Co Ltd Strength testing method and device for embedded member in concrete molding
CN205506550U (en) * 2016-03-02 2016-08-24 江苏方建工程质量鉴定检测有限公司 Concrete sample brazilian test anchor clamps
CN208937409U (en) * 2018-09-04 2019-06-04 中交武汉港湾工程设计研究院有限公司 The general splitting fixture of concrete durability experiment
CN110455640A (en) * 2019-08-14 2019-11-15 北京建筑大学 Tensile Strength of Frozen Soil test macro and test method

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
CN203396643U (en) * 2013-08-28 2014-01-15 深圳大学 Cube test block splitting test clamp
CN204389274U (en) * 2015-01-26 2015-06-10 河南理工大学 A kind of coal petrography diametral compression test device
CN106944737B (en) * 2017-03-28 2019-05-31 江苏大学 Connecting rod ultrasonic wave added cracks processing method and its processing unit (plant)
CN108709800A (en) * 2018-08-31 2018-10-26 中国矿业大学 A kind of centralising device for concrete sample spilt test
CN210142040U (en) * 2019-04-12 2020-03-13 中铁第四勘察设计院集团有限公司 Cube test block splitting test fixture

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07318471A (en) * 1994-05-26 1995-12-08 Ishikawajima Constr Materials Co Ltd Strength testing method and device for embedded member in concrete molding
CN205506550U (en) * 2016-03-02 2016-08-24 江苏方建工程质量鉴定检测有限公司 Concrete sample brazilian test anchor clamps
CN208937409U (en) * 2018-09-04 2019-06-04 中交武汉港湾工程设计研究院有限公司 The general splitting fixture of concrete durability experiment
CN110455640A (en) * 2019-08-14 2019-11-15 北京建筑大学 Tensile Strength of Frozen Soil test macro and test method

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